JANUS ASPEN SERIES
N-30D, 1997-08-22
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                               Janus Aspen Series
                             1997 Semiannual Report

                                                                    [Logo] JANUS
<PAGE>

                               TABLE OF CONTENTS
- --------------------------------------------------------------------------------
JANUS ASPEN SERIES
- --------------------------------------------------------------------------------
Portfolio Managers' Commentary and Schedules of Investments
- --------------------------------------------------------------------------------
     Growth Portfolio                                                          2
- --------------------------------------------------------------------------------
     Aggressive Growth Portfolio                                               6
- --------------------------------------------------------------------------------
     Capital Appreciation Portfolio                                            9
- --------------------------------------------------------------------------------
     International Growth Portfolio                                           11
- --------------------------------------------------------------------------------
     Worldwide Growth Portfolio                                               17
- --------------------------------------------------------------------------------
     Balanced Portfolio                                                       23
- --------------------------------------------------------------------------------
     Equity Income Portfolio                                                  27
- --------------------------------------------------------------------------------
     Flexible Income Portfolio                                                30
- --------------------------------------------------------------------------------
     High-Yield Portfolio                                                     33
- --------------------------------------------------------------------------------
     Short-Term Bond Portfolio                                                36
- --------------------------------------------------------------------------------
     Money Market Portfolio                                                   38
- --------------------------------------------------------------------------------
Notes to Schedules of Investments                                             39
- --------------------------------------------------------------------------------
Statements of Asstes and Liabilities                                          40
- --------------------------------------------------------------------------------
Statements of Operations                                                      40
- --------------------------------------------------------------------------------
Statements of Changes in Net Assets                                           42
- --------------------------------------------------------------------------------
Financial Highlights                                                          44
- --------------------------------------------------------------------------------
Notes to Financial Statements                                                 47
- --------------------------------------------------------------------------------

<PAGE>

        Janus Aspen Growth Portfolio -  Portfolio Manager, James P. Craig

Performance Review

Janus Aspen Growth  Portfolio  gained  13.27%  during the first half of the year
ended June 30, 1997, compared to a gain of 20.60% for the S&P 500 Index.(1) Both
returns include reinvested dividends.

During  the first  half,  strong  cash  flows  into  equities,  corporate  share
buybacks,  strong earnings growth, and virtually no inflation combined to make a
very strong market.  For some time now,  stocks have been the preferred  vehicle
for retirement investments.  Old valuation standards appear to be falling by the
wayside,  and frankly, as a traditional  business analyst, I am having to adjust
to the new, high PE environment.  Using strict valuation rules caused me to sell
positions  too early in some cases and not to invest  quickly  enough in others.
Perhaps we really  are in a new equity  environment  and the  business  of stock
picking has changed a bit. In the future, I may have to be more flexible.

Because I could not find enough  attractive  opportunities  for much of the last
six months, I let cash accumulate.  The Portfolio's cash position and the narrow
breadth of the  market  were the  primary  reasons we did not keep pace with the
Index.  For most of the first half,  only the very  largest  stocks  drove Index
performance.  During the first calendar  quarter of 1997, the largest 100 stocks
in the S&P 500 Index accounted for approximately 86% of the Index's performance.
It was a market  where size and  liquidity  took  precedence  over  earnings and
business potential.

During the market  decline in March and April,  I took advantage of lower prices
to put cash to work. I believe we have identified some good  opportunities  that
will lead to better performance.

- --------------------------------------------------------------------------------
Portfolio Profile       June 30, 1997     December 31, 1996
Equities                     87.1%              80.3%
  Foreign                    16.2%              14.4%
  Europe                     14.5%              12.0%
Top 10 Equities              17.6%              21.5%
Number of Stocks              142                124
Cash & Cash Equivalents      12.9%              19.7%
- --------------------------------------------------------------------------------

Stock Highlights

Two exciting new additions to the Portfolio were Nationwide  Financial  Services
and Philips  Electronics.  Nationwide  is a newly  public  company spun off from
Nationwide  Insurance.  It is one of the top three  participants  in the rapidly
growing variable annuity market. Philips is headquartered in the Netherlands and
manufactures  consumer  electronics.  The company has successfully  undertaken a
major  restructuring  of its  operations  under a new CEO. To date,  Philips has
closed or divested over 28 divisions, reduced its headquarters staff by 30%, and
still has significant changes pending.

Our  financial  service  companies  continued to perform well during the period.
Familiar names such as Citicorp, Bank of New York, and Associates First Capital,
the well-run consumer finance company,  were in this group.  Disability  insurer
UNUM also appreciated. 

A sell-off in technology  afforded an opportunity to build  positions in stable,
high-quality  technology companies.  These companies are dominant competitors in
their market sectors and include Parametric Technology in engineering and design
software,  Microsoft in personal computer operating software,  Texas Instruments
in  the  semiconductor  industry,  and  Lucent  Technologies  in  communications
equipment.  In addition, MFS Communications was purchased by WorldCom at a price
well above our cost.

A substantial  portion of Portfolio assets remain committed to  pharmaceuticals.
Warner-Lambert  was added to existing  positions  in Pfizer,  Johnson & Johnson,
SmithKline  Beecham,  and Bristol Myers Squibb.  Warner-Lambert's  new drugs for
cholesterol  reduction  and  for  diabetes  are  penetrating  the  market  at an
unprecedented  rate, and, along with other products in the pipeline,  could make
Warner-Lambert  the fastest  growing  major drug  company  for the next  several
years.

Finally,   Dionex,   Wal-Mart,   and  Equifax   made   significant   performance
contributions. Dionex is a maker of specialty laboratory equipment and continues
to streamline operations. Retailing giant Wal-Mart has begun to slow its capital
expenditures  by reducing  inventories and is also  repurchasing  its own stock.
Equifax, a business services company,  collects and supplies credit information.
Not only is demand  for credit  information  on the rise from  cellular  service
providers and other  telecommunications  utilities, but it is also being used by
financial companies to market their services to a defined prospect base.

I took losses in aerospace and manufacturing  conglomerate  Raychem when margins
compressed,  and in IKON, a provider of office supplies and equipment, after the
company had operational difficulties with recent acquisitions.

The Current Outlook

A rebound in small and medium-sized companies occurred during the second quarter
of  1997.  So  I am  hopeful  we  will  return  to  a  market  that  takes  into
consideration  business fundamentals and earnings growth and pays less attention
to size and liquidity.  Markets that rely too much on arbitrary criteria tend to
be short-lived.  Over time, solid business practices and profits determine share
price.  By those  standards,  our companies  get high marks,  and should do well
going forward.

Thank you for your investment in Janus Aspen Growth Portfolio.

- --------------------------------------------------------------------------------
(1)  Index and Portfolio returns include reinvested  dividends.  The Portfolio's
     securities may differ significantly from the securities in the index. Index
     returns  do not  include  taxes on  dividends  and  interest  payments,  or
     operating expenses necessary to maintain a portfolio consisting of the same
     securities that are in the index.  The Portfolio's  return does not reflect
     the  charges  and  expenses  of  any  particular  insurance  product.  Past
     performance is no guarantee of future results.

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 2
<PAGE>

             Janus Aspen Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Common Stock - 87.1%
- --------------------------------------------------------------------------------
Aerospace and Defense - 1.5%
     32,525    AlliedSignal, Inc.                                  $   2,732,100
     28,000    Boeing Co.                                              1,485,750
     33,250    United Technologies Corp.                               2,759,750
- --------------------------------------------------------------------------------
                                                                       6,977,600
- --------------------------------------------------------------------------------
Airlines - 0.7%
     38,100    Delta Air Lines, Inc.                                   3,124,200
- --------------------------------------------------------------------------------
Automotive - Truck Parts and Equipment - 0.7%
     88,275    Federal-Mogul Corp.                                     3,089,625
- --------------------------------------------------------------------------------
Beverages - Non-Alcoholic - 0.2%
     32,550    Coca-Cola Enterprises, Inc.                               748,650
- --------------------------------------------------------------------------------
Broadcast Services and Programming - 0.1%
     13,950    Grupo Televisa S.A. (GDR)*                                423,731
- --------------------------------------------------------------------------------
Cable Television - 0.6%
      9,250    Cablevision Systems Corp.*                                499,500
     48,100    Comcast Corp. - Class A                                 1,028,138
    100,950    Tele-Communications, Inc. - Class A*                    1,501,631
- --------------------------------------------------------------------------------
                                                                       3,029,269
- --------------------------------------------------------------------------------
Chemicals - Diversified - 4.6%
    102,270    BASF A.G.                                               3,782,596
    124,687    BOC Group PLC**                                         2,168,548
     39,825    Cytec Industries, Inc.*                                 1,488,459
    111,200    E.I. du Pont de Nemours and Co.                         6,991,700
     50,000    Imperial Chemical Industries PLC (ADR)                  2,843,750
    112,275    Monsanto Co.                                            4,834,842
- --------------------------------------------------------------------------------
                                                                      22,109,895
- --------------------------------------------------------------------------------
Chemicals - Specialty - 0.1%
     11,025    Praxair, Inc.                                             617,400
- --------------------------------------------------------------------------------
Commercial Banks - 2.6%
      9,475    First Empire State Corp.                                3,193,075
     19,275    Northern Trust Corp.                                      932,428
     70,000    Signet Banking Corp.                                    2,520,000
     49,075    Star Banc Corp.                                         2,073,419
     83,425    State Street Corp.                                      3,858,406
- --------------------------------------------------------------------------------
                                                                      12,577,328
- --------------------------------------------------------------------------------
Commercial Services - 0.2%
     12,038    ServiceMaster L.P.                                        273,101
        347    SGS Societe Generale de
               Surveillance Holdings S.A.                                742,628
- --------------------------------------------------------------------------------
                                                                       1,015,729
- --------------------------------------------------------------------------------
Computer Services - 1.8%
    121,725    Computer Sciences Corp.*                                8,779,416
- --------------------------------------------------------------------------------
Computer Software - 3.2%
     80,000    Cadence Design Systems, Inc.*                           2,680,000
     35,425    Microsoft Corp.*                                        4,476,835
    191,300    Parametric Technology Corp.*                            8,142,206
- --------------------------------------------------------------------------------
                                                                      15,299,041
- --------------------------------------------------------------------------------
Computers - Micro - 0.3%
     14,000    Compaq Computer Corp.*                                  1,389,500
- --------------------------------------------------------------------------------
Consumer Products - 1.0%
    206,175    Gibson Greetings, Inc.*                                 4,638,937
- --------------------------------------------------------------------------------
Containers - Paper and Plastic - 0.3%
     31,575    Sealed Air Corp.*                                      1,499,812
- --------------------------------------------------------------------------------
Cosmetics and Toiletries - 1.1%
     35,600    Avon Products, Inc.                                     2,512,025
     25,000    Colgate-Palmolive Co.                                   1,631,250
     28,706    Rhone-Poulenc - Class A**                               1,173,482
- --------------------------------------------------------------------------------
                                                                       5,316,757
- --------------------------------------------------------------------------------
Cruise Lines - 1.1%
     77,025    Carnival Corp. - Class A                            $   3,177,281
     60,375    Royal Caribbean Cruises, Ltd.                           2,109,352
- --------------------------------------------------------------------------------
                                                                       5,286,633
- --------------------------------------------------------------------------------
Data Processing and Management - 1.1%
    122,200    First Data Corp.                                        5,369,162
- --------------------------------------------------------------------------------
Diversified Financial Services - 1.1%
     91,425    Associates First Capital Corp. - Class A                5,074,088
- --------------------------------------------------------------------------------
Diversified Operations - 5.8%
    111,100    General Electric Co.                                    7,263,162
     55,775    Minnesota Mining and Manufacturing Co.                  5,689,050
    264,220    Rentokil Initial PLC**                                    927,854
    283,890    Siebe PLC**                                             4,805,103
     20,000    Tyco International, Ltd.                                1,391,250
     30,925    Unilever N.V. - N.Y. Shares                             6,741,650
     41,150    Westinghouse Electric Corp.                               951,594
- --------------------------------------------------------------------------------
                                                                      27,769,663
- --------------------------------------------------------------------------------
Electronic Components - 2.9%
    138,742    Philips Electronics N.V.                                9,956,059
     47,475    Texas Instruments, Inc.                                 3,990,867
- --------------------------------------------------------------------------------
                                                                      13,946,926
- --------------------------------------------------------------------------------
Electronic Security Devices - 0.3%
     30,675    Pittway Corp. - Class A                                 1,526,081
- --------------------------------------------------------------------------------
Finance - Consumer Loans - 0.7%
     93,029    Lloyds TSB Group PLC**                                    953,741
     19,775    Student Loan Marketing Association                      2,511,425
- --------------------------------------------------------------------------------
                                                                       3,465,166
- --------------------------------------------------------------------------------
Finance - Investment Banker/Broker - 0.8%
     91,475    Charles Schwab Corp.                                    3,721,889
- --------------------------------------------------------------------------------
Finance - Other Services - 0.8%
    101,850    Equifax, Inc.                                           3,787,547
- --------------------------------------------------------------------------------
Food - Diversified - 0.7%
     50,000    ConAgra, Inc.                                           3,206,250
- --------------------------------------------------------------------------------
Food - Retail - 0.5%
     50,925    Safeway, Inc.*                                          2,348,916
- --------------------------------------------------------------------------------
Food - Wholesale - 0.5%
     88,800    J.P. Foodservice, Inc.*                                 2,547,450
- --------------------------------------------------------------------------------
Hotels and Motels - 0.1%
     42,000    Extended Stay America, Inc.*                              661,500
- --------------------------------------------------------------------------------
Human Resources - 0.7%
     25,000    Manpower, Inc.                                          1,112,500
     47,800    Robert Half International, Inc.*                        2,249,588
- --------------------------------------------------------------------------------
                                                                       3,362,088
- --------------------------------------------------------------------------------
Instruments - Controls - 0.5%
     41,525    Parker Hannifin Corp.                                   2,520,048
- --------------------------------------------------------------------------------
Instruments - Scientific - 1.6%
    134,225    Dionex Corp.*                                           6,879,031
      8,175    Perkin-Elmer Corp.                                        650,424
- --------------------------------------------------------------------------------
                                                                       7,529,455
- --------------------------------------------------------------------------------
Life and Health Insurance - 5.2%
     51,575    AFLAC, Inc.                                             2,436,919
    382,350    Nationwide Financial Services, Inc. - Class A*         10,156,172
     30,000    Protective Life Corp.                                   1,507,500
     25,075    UICI*                                                     739,712
    175,500    UNUM Corp.                                              7,371,000
     86,250    Western National Corp.                                  2,312,578
- --------------------------------------------------------------------------------
                                                                      24,523,881
- --------------------------------------------------------------------------------
Medical - Biomedical and Genetic - 0.2%
     25,800    Immunex Corp.*                                            935,250
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 3
<PAGE>

             Janus Aspen Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Medical - Drugs - 5.9%
     29,675    American Home Products Corp.                          $ 2,270,138
     66,825    Bristol-Myers Squibb Co.                                5,412,825
     55,762    Glaxo Wellcome PLC**                                    1,150,778
     46,075    Pfizer, Inc.                                            5,505,962
    296,000    SmithKline Beecham PLC**                                5,446,056
     64,875    Warner-Lambert Co.                                      8,060,719
- --------------------------------------------------------------------------------
                                                                      27,846,478
- --------------------------------------------------------------------------------
Medical - HMO - 1.5%
    137,250    United Healthcare Corp.                                 7,137,000
- --------------------------------------------------------------------------------
Medical - Hospitals - 0.3%
     42,775    Tenet Healthcare Corp.*                                 1,264,536
- --------------------------------------------------------------------------------
Medical - Products - 1.9%
     26,375    Baxter International, Inc.                              1,378,094
     40,725    Fresenius Medical Care A.G. (ADR)*                      1,186,115
    104,375    Johnson & Johnson                                       6,719,141
- --------------------------------------------------------------------------------
                                                                       9,283,350
- --------------------------------------------------------------------------------
Medical - Wholesale Drug Distribution - 0.6%
     53,625    Cardinal Health, Inc.                                   3,070,031
- --------------------------------------------------------------------------------
Medical Instruments - 0.5%
     13,150    Boston Scientific Corp.*                                  807,903
     17,950    Guidant Corp.                                           1,525,750
- --------------------------------------------------------------------------------
                                                                       2,333,653
- --------------------------------------------------------------------------------
Medical Labs and Testing Services - 0.2%
     51,400    Covance, Inc.*                                            992,662
- --------------------------------------------------------------------------------
Metal - Aluminum - 0.8%
     51,100    Reynolds Metals Co.                                     3,640,875
- --------------------------------------------------------------------------------
Money Center Banks - 7.1%
    208,525    Bank of New York Co., Inc.                              9,070,838
     65,200    BankAmerica Corp.                                       4,209,475
    261,502    Barclays PLC**                                          5,187,796
     64,825    Citicorp                                                7,815,464
     30,614    Deutsche Bank A.G.                                      1,790,247
    123,084    ING Groep N.V.                                          5,685,182
- --------------------------------------------------------------------------------
                                                                      33,759,002
- --------------------------------------------------------------------------------
Multilevel Direct Selling - 0.2%
     21,175    Amway Asia Pacific, Ltd.                                  923,759
- --------------------------------------------------------------------------------
Multimedia - 0.3%
     50,425    Meredith Corp.                                          1,462,325
          1    Viacom, Inc. - Class B*                                        30
- --------------------------------------------------------------------------------
                                                                       1,462,355
- --------------------------------------------------------------------------------
Networking Products - 0.4%
     30,675    Cisco Systems, Inc.*                                    2,059,059
- --------------------------------------------------------------------------------
Office Automation and Equipment - 0.8%
     45,675    Xerox Corp.                                             3,602,616
- --------------------------------------------------------------------------------
Oil - Field Services - 1.0%
     15,000    Halliburton Co.                                         1,188,750
     29,175    Schlumberger, Ltd.                                      3,646,875
- --------------------------------------------------------------------------------
                                                                       4,835,625
- --------------------------------------------------------------------------------
Oil and Gas Drilling - 1.6%
     50,000    Global Marine, Inc.*                                    1,162,500
     75,000    Noble Drilling Corp.*                                   1,692,188
    146,400    Santa Fe International Corp.*                           4,977,600
- --------------------------------------------------------------------------------
                                                                       7,832,288
- --------------------------------------------------------------------------------
Oil Companies - Exploration and Production - 2.6%
     63,900    Burlington Resources, Inc.                            $ 2,819,587
     60,000    Enron Oil & Gas Co.                                     1,087,500
    250,000    Gulf Canada Resources, Ltd.*                            2,078,125
     35,000    Noble Affiliates, Inc.                                  1,354,062
     30,000    Renaissance Energy, Ltd.*                                 835,050
    100,000    Union Pacific Resources Group, Inc.                     2,487,500
     58,050    YPF S.A. (ADR)                                          1,785,038
- --------------------------------------------------------------------------------
                                                                      12,446,862
- --------------------------------------------------------------------------------
Oil Companies - Integrated - 3.6%
    300,000    British Petroleum Co., PLC**                            3,727,200
     20,000    Mobil Corp.                                             1,397,500
     64,500    Royal Dutch Petroleum Co. - N.Y. Shares                 3,507,187
     50,000    Texaco, Inc.                                            5,437,500
     81,000    Unocal Corp.                                            3,143,813
- --------------------------------------------------------------------------------
                                                                      17,213,200
- --------------------------------------------------------------------------------
Oil Field Machinery and Equipment - 1.9%
     50,000    Baker Hughes, Inc.                                      1,934,375
    120,000    Smith International, Inc.*                              7,290,000
- --------------------------------------------------------------------------------
                                                                       9,224,375
- --------------------------------------------------------------------------------
Pharmacy Services - 0.2%
     32,750    Omnicare, Inc.                                          1,027,531
- --------------------------------------------------------------------------------
Property and Casualty Insurance - 0.6%
    166,000    Sumitomo Marine & Fire Insurance Co.                    1,363,628
    112,000    Tokio Marine & Fire Insurance Co.                       1,468,146
- --------------------------------------------------------------------------------
                                                                       2,831,774
- --------------------------------------------------------------------------------
Protection - Safety - 0.3%
    100,000    Lo-Jack Corp.*                                          1,437,500
- --------------------------------------------------------------------------------
Publishing - Books - 1.3%
     51,469    Wolters Kluwer N.V.                                     6,278,239
- --------------------------------------------------------------------------------
Retail - Building Products - 0.4%
     36,425    Fastenal Co.                                            1,784,825
- --------------------------------------------------------------------------------
Retail - Consumer Electronics - 0.4%
     30,100    Tandy Corp.                                             1,685,600
- --------------------------------------------------------------------------------
Retail - Discount - 1.0%
     16,975    TJX Companies, Inc.                                       447,716
    120,000    Wal-Mart Stores, Inc.                                   4,057,500
- --------------------------------------------------------------------------------
                                                                       4,505,216
- --------------------------------------------------------------------------------
Retail - Diversified - 0.1%
      7,993    Vendex International N.V.                                 438,539
- --------------------------------------------------------------------------------
Retail - Hypermarkets - 0.9%
    133,275    Costco Companies, Inc.*                                 4,381,416
- --------------------------------------------------------------------------------
Retail - Major Department Stores - 1.7%
    116,675    Dayton Hudson Corp.                                     6,205,652
     33,675    J.C. Penney Co., Inc.                                   1,757,414
- --------------------------------------------------------------------------------
                                                                       7,963,066
- --------------------------------------------------------------------------------
Retail - Restaurants - 0.4%
     76,350    Wendy's International, Inc.                             1,980,328
- --------------------------------------------------------------------------------
Rubber - Tires - 0.2%
    402,365    Pirelli S.p.A.                                          1,013,302
- --------------------------------------------------------------------------------
Savings/Loan/Thrifts - 0.2%
     10,000    Catskill Financial Corp.                                  155,000
     27,400    Long Island Bancorp, Inc.                                 994,963
- --------------------------------------------------------------------------------
                                                                       1,149,963
- --------------------------------------------------------------------------------
Special Purpose Banks - 0.3%
     15,216    Dexia France**                                          1,482,481
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 4
<PAGE>

             Janus Aspen Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Telecommunication Equipment - 1.9%
     37,675    ECI Telecommunications, Ltd.                        $   1,120,831
     69,150    Lucent Technologies, Inc.                               4,983,122
     32,075    Northern Telecom, Ltd.                                  2,918,825
- --------------------------------------------------------------------------------
                                                                       9,022,778
- --------------------------------------------------------------------------------
Telecommunication Services - 0.2%
     28,300    Telefonaktiebolaget L.M. Ericsson (ADR) - Class B       1,114,312
- --------------------------------------------------------------------------------
Telephone - Local - 0.5%
     70,300    Cincinnati Bell, Inc.                                   2,214,450
- --------------------------------------------------------------------------------
Television - 0.6%
     50,725    Univision Communications, Inc.*                         1,984,616
     24,100    Young Broadcasting Corp. - Class A*                       783,250
- --------------------------------------------------------------------------------
                                                                       2,767,866
- --------------------------------------------------------------------------------
Tobacco - 0.4%
     40,300    Philip Morris Companies, Inc.                           1,788,312
- --------------------------------------------------------------------------------
Transportation - Truck - 0.7%
    194,350    Consolidated Freightways Corp.*                         3,182,481
- --------------------------------------------------------------------------------
Total Common Stock (cost $355,688,533)                               415,196,588
- --------------------------------------------------------------------------------
Short-Term Corporate Notes - 6.3%
$10,000,000    AVCO Financial Service
                 5.58%, 8/26/97                                        9,913,200
 10,000,000    Deutsche Bank A.G.
                 5.48%, 7/7/97                                         9,990,867
 10,000,000    NationsBank Corp.
                 5.57%, 8/19/97                                        9,924,186
- --------------------------------------------------------------------------------
Total Short-Term Corporate Notes (amortized cost $29,828,253)         29,828,253
- --------------------------------------------------------------------------------
U. S. Government Agencies - 8.6%
 30,000,000   Fannie Mae
                5.41%, 7/24/97                                        29,896,308
 11,000,000   Federal Home Loan Mortgage Corp.
                5.75%, 7/1/97                                         11,000,000
- --------------------------------------------------------------------------------
Total U. S. Government Agencies (amortized cost $40,896,308)          40,896,308
- --------------------------------------------------------------------------------
Total Investments (total cost $426,413,094) - 102.0%                 485,921,149
- --------------------------------------------------------------------------------
Liabilities, net of Cash, Receivables, and Other Assets - (2.0%)     (9,383,664)
- --------------------------------------------------------------------------------
Net Assets - 100%                                                   $476,537,485
- --------------------------------------------------------------------------------

                       Summary of Investments by Country
                                 June 30, 1997

Country                       % of Investment Securities            Market Value
- --------------------------------------------------------------------------------
Argentina                               0.4%                          $1,785,038
Canada                                  0.2%                             835,050
France                                  0.5%                           2,655,963
Germany                                 1.4%                           6,758,958
Hong Kong                               0.2%                             923,759
Israel                                  0.2%                           1,120,831
Italy                                   0.2%                           1,013,302
Japan                                   0.6%                           2,831,774
Mexico                                  0.1%                             423,731
Netherlands                             6.7%                          32,606,855
Sweden                                  0.2%                           1,114,313
Switzerland                             0.2%                             742,627
United Kingdom                          5.0%                          24,367,076
United States++                        84.1%                         408,741,872
- --------------------------------------------------------------------------------
Total                                 100.0%                        $485,921,149
================================================================================
++ Includes Short-Term Securities (69.6% excluding Short-Term Securities)

                           Forward Currency Contracts
                             Open at June 30, 1997

  Currency Sold and              Currency            Currency        Unrealized
   Settlement Date              Units Sold        Value in $ U.S.    Gain/(Loss)
- --------------------------------------------------------------------------------
British Pound 7/24/97            3,700,000           $6,154,580        ($92,500)
British Pound 7/28/97            2,000,000            3,326,400         (91,882)
British Pound 8/20/97            1,900,000            3,157,800        (128,621)
British Pound 11/24/97           4,150,000            6,876,550         (91,733)
French Franc 10/10/97            5,300,000              908,172          22,551
- --------------------------------------------------------------------------------
Total                                               $20,423,502       ($382,185)
================================================================================

See Notes to Schedule of Investments

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 5
<PAGE>

  Janus Aspen Aggressive Growth Portfolio - Portfolio Manager, James P. Goff

Performance Review

The Janus Aspen  Aggressive  Growth Portfolio gained 2.63% for the first half of
the year ended June 30,  1997.  The  Standard & Poor's  MidCap 400 Index  gained
13.04%(1). All returns include reinvested dividends.

We lagged the Index primarily  because the larger  capitalization  stocks in the
Index  outperformed  the broad mid-cap universe during the first three months of
the  period.  The  stocks of  larger  companies  have  dominated  their  smaller
counterparts  for  the  better  part  of  a  year  now.  Numerous  factors  have
contributed to the relative dominance of larger stocks, including a long stretch
of above average corporate earnings, an affinity among investors' for liquidity,
and "hot" money chasing a limited  number of stocks in the indexing  phenomenon.
Stocks with high  price-to-earnings  multiples  (PEs) were  especially  hard hit
earlier in the year, even when they met or exceeded earnings estimates. Although
our companies are actually  thriving on a fundamental  basis,  their prices came
down anyway.

Finally,  we had several  disappointments  during the period,  including  Paging
Network, Global DirectMail,  and Viking Office Supplies. Paging Network was sold
at a loss  when  unexpectedly  large  investments  in its  new  paging  product,
VoiceNow,  put our  earnings  estimates  in jeopardy.  Direct  marketers  Global
DirectMail  and  Viking  Office  Products  were  sold at losses  when  increased
competition  in  their  catalogue   businesses  caused  them  to  miss  earnings
estimates.

- --------------------------------------------------------------------------------
Portfolio Profile        June 30, 1997    December 31, 1996
Equities                     93.7%              94.4%
  Foreign                    14.4%              14.7%
Number of Stocks               75                 59
Top 10 Equities              42.5%              45.8%
Cash & Cash Equivalents       6.3%               5.6%
- --------------------------------------------------------------------------------

Stock Highlights

During the period,  I remained  true to my investment  discipline,  and while we
were  frustrated  in the early  going,  my patience  recently  began to pay off.
Fastenal,  Papa John's,  Premier Parks, Omnicare, and the Apollo Group saw their
prices  decline  substantially  as the year  began,  despite  strong  underlying
earnings  growth.  However,  all five posted strong gains in the second quarter,
recouping their previous losses, as the turnaround in market psychology  started
to reward  companies with solid  fundamentals  and rapid earnings  growth.  Papa
John's  International  serves  as  a  good  example  of  the  change  in  market
psychology.  Papa John's is a well-run  pizza delivery chain which prides itself
on quality  products and service.  The company has reported  quarterly  earnings
gains of 56% and 48%, nicely  exceeding our expectations for long-term growth of
35% and Wall Street's estimates of 30%.  In spite of its strong  outperformance,
the stock had declined 25% earlier in the year. But during the second quarter it
recouped its losses.  

Regal Cinemas and Sofamor Danek Group are new additions to the Portfolio.  Regal
is the sixth largest operator of movie theaters in the U.S., and boasts the best
levels of  profitability  and growth in the industry by a wide  margin.  Regal's
management has proven itself highly capable in growing the company rapidly, both
internally  and  through  acquisitions,  while  maintaining  superior  levels of
profitability.   The  company  enjoys  tremendous  economies  of  scale  as  its
multiplexes  have on average at least eight movie screens  each,  the highest in
the industry.  Sofamor Danek dominates the market for surgical spinal  implants.
The FDA recently expanded its approval for the company's products,  allowing for
increased  surgical  applications.   Additionally,  new  products,  including  a
minimally invasive camera, should help boost future revenues.

In  general,  restaurants  and  wireless  communications,  two  areas  where the
Portfolio had concentrations, have drastically underperformed the general market
for some time. Our three  restaurant/pub  companies  achieved  average  earnings
gains  of 48% in the  first  quarter,  but  underperformed  due to the  negative
perception of the restaurant group. With the exception of Paging Network,  which
was mentioned  earlier,  our wireless stocks also beat earnings  estimates,  but
their  stock  prices  were  off  due to  poor  market  perception,  not to a any
deterioration in fundamentals.  CommNet Cellular,  serves as a good example. The
stock  price  soared  from  depressed  levels  following   Blackstone  Capital's
acquisition bid, which  reaffirmed our belief that there are tremendous  pockets
of value in the cellular industry.

Portfolio Strategy

Although the Portfolio recorded good results during the second quarter, we still
have a ways to go. I am not pleased with the year-to-date results. But I believe
that we are only beginning to be rewarded for our patience, and that we have yet
to be paid for our investments' full potential.  I remain enthusiastic about the
current Portfolio's prospects,  and continue to search for compelling investment
ideas where our research can truly add value.

Thank  you for your  continued  investment  in  Janus  Aspen  Aggressive  Growth
Portfolio.

- --------------------------------------------------------------------------------
(1)  Index and Portfolio returns include reinvested  dividends.  The Portfolio's
     securities may differ significantly from the securities in the index. Index
     returns  do not  include  taxes on  dividends  and  interest  payments,  or
     operating expenses necessary to maintain a portfolio consisting of the same
     securities that are in the index.  The Portfolio's  return does not reflect
     the  charges  and  expenses  of  any  particular  insurance  product.  Past
     performance is no guarantee of future results.

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 6
<PAGE>

       Janus Aspen Aggressive Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Common Stock - 93.3%
- --------------------------------------------------------------------------------
Advertising Sales - 1.4%
    152,775    Outdoor Systems, Inc.*                              $   5,843,644
- --------------------------------------------------------------------------------
Cellular Telecommunications - 1.4%
     22,250    CommNet Cellular, Inc.*                                   773,188
    545,421    PriCellular Corp. - Class A*                            5,011,055
- --------------------------------------------------------------------------------
                                                                       5,784,243
- --------------------------------------------------------------------------------
Chemicals - Specialty - 0.5%
     55,875    Minerals Technologies, Inc.                             2,095,313
- --------------------------------------------------------------------------------
Commercial Banks - 0.9%
      7,725    First Empire State Corp.                                2,603,325
      2,725    Northern Trust Corp.                                      131,822
     31,700    Regions Financial Corp.                                 1,002,513
- --------------------------------------------------------------------------------
                                                                       3,737,660
- --------------------------------------------------------------------------------
Commercial Services - 2.6%
    245,237    Paychex, Inc.                                           9,319,006
    126,500    Profit Recovery Group International*                    1,755,188
- --------------------------------------------------------------------------------
                                                                      11,074,194
- --------------------------------------------------------------------------------
Computers - Mainframe - 0.1%
     49,675    Amdahl Corp.*                                             434,656
- --------------------------------------------------------------------------------
Containers - Paper and Plastic - 1.8%
    160,250    Sealed Air Corp.*                                       7,611,875
- --------------------------------------------------------------------------------
Cruise Lines - 0.8%
    103,450    Royal Caribbean Cruises, Ltd.                           3,614,284
- --------------------------------------------------------------------------------
Dental Supplies and Equipment - 0%
      2,750    Sybron International Corp.*                               109,656
- --------------------------------------------------------------------------------
Direct Marketing - 0.1%
     10,150    Catalina Marketing Corp.*                                 488,469
- --------------------------------------------------------------------------------
Diversified Financial Services - 0.4%
     28,900    Associates First Capital Corp. - Class A                1,603,950
- --------------------------------------------------------------------------------
Diversified Operations - 0.4%
    440,238    Rentokil Initial PLC**                                  1,545,972
- --------------------------------------------------------------------------------
Drug Delivery Systems - 0.5%
    142,875    DepoTech Corp.*                                         1,946,672
- --------------------------------------------------------------------------------
Electric Products - 2.2%
    329,050    Littelfuse, Inc.*                                       9,295,663
- --------------------------------------------------------------------------------
Electronic Components - 0.6%
    119,450    Methode Electronics - Class A                           2,374,069
- --------------------------------------------------------------------------------
Finance - Auto Loans - 0.2%
     83,125    Credit Acceptance Corp.*                                1,070,234
- --------------------------------------------------------------------------------
Finance - Consumer Loans - 0.2%
      7,450    Household International, Inc.                             874,909
- --------------------------------------------------------------------------------
Finance - Investment Banker/Broker - 1.0%
    100,700    Charles Schwab Corp.                                    4,097,231
- --------------------------------------------------------------------------------
Finance - Leasing Companies - 0.1%
      6,750    Finova Group, Inc.                                        516,375
- --------------------------------------------------------------------------------
Finance - Mortgage Loan Banker - 0.2%
     25,925    Federal Agricultural Mortgage Corp.*                      939,781
- --------------------------------------------------------------------------------
Finance - Other Services - 1.1%
     24,700    HealthCare Financial Partners, Inc.*                      503,263
    219,725    Medallion Financial Corp.                               4,202,241
- --------------------------------------------------------------------------------
                                                                       4,705,504
- --------------------------------------------------------------------------------
Food - Retail - 0.8%
     63,575    Quality Food Centers, Inc.                              2,415,850
     17,925    Safeway, Inc.*                                            826,791
- --------------------------------------------------------------------------------
                                                                       3,242,641
- --------------------------------------------------------------------------------
Food - Wholesale - 0.5%
     71,600    J.P. Foodservice, Inc.*                             $   2,054,025
- --------------------------------------------------------------------------------
Golf - 1.4%
    260,525    Family Golf Centers, Inc.*                              5,992,075
- --------------------------------------------------------------------------------
Hotels and Motels - 4.0%
     62,925    Choice Hotels International, Inc.*                      1,065,792
    276,675    HFS, Inc.*                                             16,047,150
- --------------------------------------------------------------------------------
                                                                      17,112,942
- --------------------------------------------------------------------------------
Human Resources - 0.1%
      4,800    Robert Half International, Inc.*                          225,900
- --------------------------------------------------------------------------------
Independent Power Producer - 1.5%
    262,125    Trigen Energy Corp.                                     6,553,125
- --------------------------------------------------------------------------------
Life and Health Insurance - 4.0%
     16,150    AFLAC, Inc.                                               763,088
    119,450    Hartford Life, Inc. - Class A*                          4,479,375
     20,825    Nationwide Financial Services, Inc. - Class A*            553,164
    155,200    Protective Life Corp.                                   7,798,800
     71,050    UICI*                                                   2,095,975
     45,200    Western National Corp.                                  1,211,925
- --------------------------------------------------------------------------------
                                                                      16,902,327
- --------------------------------------------------------------------------------
Machine Tools and Related Products - 0.2%
     34,075    JLK Direct Distribution, Inc. - Class A*                  873,172
- --------------------------------------------------------------------------------
Medical - Drugs - 3.1%
    203,075    Teva Pharmaceutical Industries, Ltd.                   13,149,106
- --------------------------------------------------------------------------------
Medical Instruments - 3.1%
    287,000    Sofamor Danek Group, Inc.*                             13,130,250
- --------------------------------------------------------------------------------
Multi-Line Insurance - 0.3%
     19,875    Travelers Group, Inc.                                   1,253,367
- --------------------------------------------------------------------------------
Pharmacy Services - 2.3%
    317,900    Omnicare, Inc.                                          9,974,113
- --------------------------------------------------------------------------------
Property and Casualty Insurance - 1.0%
     48,200    Progressive Corp. 4,193,400
- --------------------------------------------------------------------------------
Publishing - Newspapers - 0.7%
     40,525    Central Newspapers, Inc. - Class A                      2,902,603
- --------------------------------------------------------------------------------
Radio - 5.3%
    188,625    Clear Channel Communications, Inc.*                    11,600,438
    158,625    Evergreen Media Corp. - Class A                         7,078,641
     71,725    Heftel Broadcasting Corp.*                              3,962,806
- --------------------------------------------------------------------------------
                                                                      22,641,885
- --------------------------------------------------------------------------------
Real Estate Investment and Management - 2.9%
    670,500    Insignia Financial Group, Inc. - Class A*              12,152,812
- --------------------------------------------------------------------------------
Rental Auto/Equipment - 1.2%
    211,650    Coinmach Laundry Corp.*                                 5,026,687
- --------------------------------------------------------------------------------
Resorts and Theme Parks - 1.4%
    161,975    Premier Parks, Inc.*                                    5,972,828
- --------------------------------------------------------------------------------
Retail - Auto Parts - 0.9%
    102,500    O'Reilly Automotive, Inc.*                              3,946,250
- --------------------------------------------------------------------------------
Retail - Building Products - 7.8%
    680,175    Fastenal Co.                                           33,328,575
- --------------------------------------------------------------------------------
Retail - Catalog Shopping - 2.7%
    332,575    Barnett, Inc.*                                          8,148,087
     81,350    MSC Industrial Direct Co., Inc. - Class A*              3,264,169
- --------------------------------------------------------------------------------
                                                                      11,412,256
- --------------------------------------------------------------------------------
Retail - Diversified - 4.1%
    588,070    Petco Animal Supplies, Inc.*                           17,642,100
- --------------------------------------------------------------------------------
Retail - Hypermarkets - 0.2%
     20,800    Costco Companies, Inc.*                                   683,800
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 7
<PAGE>

       Janus Aspen Aggressive Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Retail - Pubs - 5.2%
    990,915    Wetherspoon (J.D.) PLC**,+                          $  22,181,478
- --------------------------------------------------------------------------------
Retail - Regional Department Stores - 0.5%
     43,560    Fred Meyer, Inc.*                                       2,251,507
- --------------------------------------------------------------------------------
Retail - Restaurants - 9.8%
    474,280    Papa John's International, Inc.*                       17,429,790
  2,315,964    PizzaExpress PLC**,+                                   24,244,546
- --------------------------------------------------------------------------------
                                                                      41,674,336
- --------------------------------------------------------------------------------
Retirement and Aged Care - 1.6%
    121,325    Karrington Health, Inc.*                                1,819,875
    145,750    Sunrise Assisted Living, Inc.*                          5,101,250
- --------------------------------------------------------------------------------
                                                                       6,921,125
- --------------------------------------------------------------------------------
Savings/Loan/Thrifts - 0.1%
      8,950    TCF Financial Corp.                                       441,906
- --------------------------------------------------------------------------------
Schools - 2.3%
    283,575    Apollo Group, Inc. - Class A*                           9,996,019
- --------------------------------------------------------------------------------
Telephone - Local - 0.1%
      8,100    Cincinnati Bell, Inc.                                     255,150
- --------------------------------------------------------------------------------
Television - 0.8%
     92,250    Univision Communications, Inc.*                         3,609,281
- --------------------------------------------------------------------------------
Theaters - 1.5%
    192,725    Regal Cinemas, Inc.*                                    6,359,925
- --------------------------------------------------------------------------------
Transportation - Railroad - 2.6%
    301,850    Wisconsin Central Transportation Corp.*                11,243,912
- --------------------------------------------------------------------------------
Vitamins and Nutrition Products - 0.2%
     60,325    Weider Nutrition International, Inc.                      957,659
- --------------------------------------------------------------------------------
Water Treatment Services - 2.3%
    222,775    Culligan Water Technologies, Inc.*                      9,969,181
- --------------------------------------------------------------------------------
X-Ray Equipment - 0.3%
     25,000    Dentsply International, Inc.                            1,225,000
- --------------------------------------------------------------------------------
Total Common Stock (cost $306,153,364)                               397,217,072
- --------------------------------------------------------------------------------
Short-Term Corporate Note - 2.3%
$10,000,000    Deutsch Bank A.G.
                 5.48%, 7/7/97 (amoritized cost $9,990,867)            9,990,867
- --------------------------------------------------------------------------------
U.S. Government Agencies - 4.6%
               Federal Home Loan Mortgage Corp.:
  9,760,000      5.75%, 7/1/97                                         9,760,000
 10,000,000      6.01%, 8/6/97                                         9,945,100
- --------------------------------------------------------------------------------
Total U.S. Government Agencies (amortized cost $19,705,100)           19,705,100
- --------------------------------------------------------------------------------
Warrants - 0.4%
- --------------------------------------------------------------------------------
Electric Products - 0.4%
     65,700    Littelfuse, Inc. - exp. 12/31/01*
                 (total cost $677,514)                                 1,486,462
- --------------------------------------------------------------------------------
Total Investments (total cost  $336,526,845) - 100.6%  428,399,501  
- --------------------------------------------------------------------------------
Liabilities, net of Cash, Receivables and Other Assets - (0.6%)      (2,554,687)
- --------------------------------------------------------------------------------
Net Assets - 100%                                                   $425,844,814
- --------------------------------------------------------------------------------


                       Summary of Investments by Country
                                 June 30, 1997

Country                   % of Investment Securities                Market Value
- --------------------------------------------------------------------------------
Israel                                  3.1%                         $13,149,106
United Kingdom                         11.2%                          47,971,996
United States++                        85.7%                         367,278,399
- --------------------------------------------------------------------------------
Total                                 100.0%                        $428,399,501
================================================================================
++ Includes Short-Term Securities (78.8% excluding Short-Term Securities)


                           Forward Currency Contracts
                             Open at June 30, 1997

Currency Sold and                Currency             Currency       Unrealized
 Settlement Date                Units Sold         Value in $ U.S.   Gain/(Loss)
- --------------------------------------------------------------------------------
British Pound 7/18/97            1,000,000           $1,663,700      $    3,405
British Pound 7/24/97            7,200,000           11,976,480        (120,608)
British Pound 7/28/97            1,700,000            2,827,440         (78,100)
British Pound 8/20/97            2,800,000            4,653,600        (189,546)
British Pound 9/11/97            1,908,000            3,168,997        (121,921)
British Pound 11/28/97           4,500,000            7,455,600        (165,150)
- --------------------------------------------------------------------------------
Total                                               $31,745,817      ($ 671,920)
================================================================================

See Notes to Schedule of Investments

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 8
<PAGE>

Janus Aspen Capital Appreciation Portfolio-Portfolio Manager, Scott W. Schoelzel

Performance Review

Janus  Aspen  Capital  Appreciation  Portfolio  opened  on May 1,  1997.  Before
discussing Portfolio performance, I would like to take this opportunity to thank
each of you for your  investment  with Janus.  The  Portfolio  got off to a good
start during its first two months, but my goals are really long-term.  I want to
generate highly competitive results for investors by purchasing great individual
businesses at reasonable prices. That basic discipline will be the driving force
behind your future returns.

Since inception,  Janus Aspen Capital Appreciation Portfolio appreciated 17.50%,
versus a gain of 10.83% for the S&P 500 Index(1). All returns include reinvested
dividends.

The  Portfolio  opened in the midst of a powerful and  broad-based  market rally
that was sparked by signs of moderate economic growth.  For much of the previous
year,  however,  market focus had been  confined  primarily  to large,  familiar
companies,   as  investors'  desire  for  predictability  and  liquidity  became
increasingly acute. Many large stocks were trading at unprecedented levels, so I
was patient in putting capital to work. Whenever possible,  I used volatility to
build positions at lower prices.

Portfolio Strategy

The Portfolio employs a "barbell" approach. At one end of the barbell are large,
stable,  professionally managed companies, such as Citicorp, Pfizer, and Merrill
Lynch,  that have  numerous  product  lines and  powerful,  secure global market
franchises.  On the  other  end  of  the  barbell  are  smaller,  faster-growing
companies such as Dell Computer,  LHS Group, and Lam Research,  which have fewer
product  lines,  higher  price-earnings  rations  (PEs),  and are still building
market  share.  The Portfolio is fairly  concentrated,  and should remain so. As
assets grow, it will probably hold 25-40 positions.

I am  enthusiastic  about a number of broad  investment  areas,  where I believe
earnings  are  the  most  dynamic.   Financial   services,   telecommunications,
technology,  health  care,  pharmaceuticals  and  biotechnology  should  benefit
greatly from  fundamental  changes in economic and demographic  trends,  both at
home and abroad. Within these areas, I try to identify individual companies with
outstanding  fundamentals.  Even though the short-term market risk may be higher
with  some of  these  companies  than  with the more  mature  businesses  in the
Portfolio, I remain convinced the long-term potential of the barbell approach is
also much higher.

- --------------------------------------------------------------------------------
Portfolio Profile          June 30, 1997
Equities                       30.1%
Top 10 Equities                25.0%
Number of Stocks                16
Cash & Cash Equivalents        69.9%
- --------------------------------------------------------------------------------

Stock Highlights

Among the large,  more mature  companies  in the  Portfolio  are two  technology
stocks,   Intel  and   Microsoft.   Intel  is  the   premier   manufacturer   of
microprocessors.  Microsoft  is,  quite  simply,  a  juggernaut  in the software
industry.  The company enjoys 91% gross margins, has no debt, and generates over
$500 million in free cash flow a month.  It owns the global  market in operating
software for PCs and is making aggressive inroads into the server market.

Eli Lilly, Warner-Lambert, and Pfizer make up our large pharmaceutical holdings.
All three have excellent product  pipelines.  Sales of Lilly's new drug Zyprexa,
which treats schizophrenia,  were well ahead of expectations,  and two other new
products,  Gemzar, for pancreatic  cancer, and Reopro, for acute  cardiovascular
disease,  are also selling well.  Warner-Lambert has already achieved incredible
market  penetration  with  Lipitor,  its new  anti-cholesterol  drug,  and  with
Rezulin, its new diabetes drug.

Our large financial  stocks include  Citicorp and Merrill Lynch,  which dominate
markets  both at home and  overseas.  The breadth  and depth of both  companies'
foreign operations make them tough  competitors.  Citicorp is a dominant banking
presence  in  emerging  economies.  Merrill  Lynch  has  huge  market  share  in
international  investment  banking.  Both companies also have substantial  stock
repurchase programs.

Dell  Computer,  LHS  Group,  and Lam  Research  represent  some of our  smaller
companies.  Dell is the most  efficient  competitor in the commercial PC market,
with excellent cost and inventory controls.  The company keeps only a twelve-day
supply of components on hand - the lowest in the industry - which has meant huge
cost  savings as the price of PC  components  has steadily  dropped.  The global
opportunities  for Dell are just now beginning to take shape, and the company is
also buying back its stock fairly aggressively. LHS provides on-line billing and
accounting  services to the fast-growing  telecommunications  industry,  and Lam
develops  and  markets  much of the  processing  equipment  used to  manufacture
semiconductors.

Going Forward

Given  the  current  market  environment,  I  intend  to  be  both  patient  and
opportunistic,  and to use volatility to build positions. The Portfolio contains
some very exciting  stocks that have  performed  well for the short time we have
held them.  But more  importantly,  these  companies have  management  teams and
product lines that should make them long-term industry leaders.

Thank you once again for your  investment  in Janus Aspen  Capital  Appreciation
Portfolio.

- --------------------------------------------------------------------------------
(1)  Index and Portfolio returns include reinvested  dividends.  The Portfolio's
     securities may differ significantly from the securities in the index. Index
     returns  do not  include  taxes on  dividends  and  interest  payments,  or
     operating expenses necessary to maintain a portfolio consisting of the same
     securities that are in the index.  The Portfolio's  return does not reflect
     the  charges  and  expenses  of  any  particular  insurance  product.  Past
     performance is no guarantee of future results.

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 9
<PAGE>

      Janus Aspen Capital Appreciation Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Common Stock - 30.1%
- --------------------------------------------------------------------------------
Computer Software - 3.6%
        160    Microsoft Corp.*                                         $ 20,220
        350    Wind River Systems*                                        13,387
- --------------------------------------------------------------------------------
                                                                          33,607
- --------------------------------------------------------------------------------
Computers - Micro - 1.2%
         96    Dell Computer Corp.*                                       11,274
- --------------------------------------------------------------------------------
Data Processing and Management - 4.7%
      1,000    LHS Group, Inc.*                                           43,812
- --------------------------------------------------------------------------------
Electronic Components - Semiconductors - 6.9%
        200    Intel Corp.                                                28,363
      1,000    Lam Research Corp.*                                        37,063
- --------------------------------------------------------------------------------
                                                                          65,426
- --------------------------------------------------------------------------------
Finance - Investment Banker/Broker - 3.7%
        580    Merrill Lynch & Co., Inc.                                  34,583
- --------------------------------------------------------------------------------
Life and Health Insurance - 0.2%
         44    SunAmerica, Inc.                                            2,145
- --------------------------------------------------------------------------------
Medical - Drugs - 3.8%
        100    Eli Lilly & Co.                                            10,931
         98    Pfizer, Inc.                                               11,711
        102    Warner-Lambert Co.                                         12,673
- --------------------------------------------------------------------------------
                                                                          35,315
- --------------------------------------------------------------------------------
Medical - HMO - 0.5%
         70    Oxford Health Plans, Inc.*                                  5,023
- --------------------------------------------------------------------------------
Money Center Banks - 3.1%
        240    BankAmerica Corp. 15,495
        112    Citicorp 13,503
- --------------------------------------------------------------------------------
                                                                          28,998
- --------------------------------------------------------------------------------
Multi-Line Insurance - 0.7%
        108    Travelers Group, Inc.                                       6,811
- --------------------------------------------------------------------------------
Telecommunication Services - 1.7%
        600    Quest Communications International, Inc.*                  16,350
- --------------------------------------------------------------------------------
Total Common Stock (cost $238,412)                                       283,344
- --------------------------------------------------------------------------------
U.S. Government Agencies - 69.5%
   $155,000    Federal Home Loan Bank
                 5.65%, 7/1/97                                           155,000
    500,000    Federal Home Loan Mortgage Corp.
                 5.75%, 7/1/97                                           500,000
- --------------------------------------------------------------------------------
Total U.S. Government Agencies (amortized cost $655,000)                 655,000
- --------------------------------------------------------------------------------
Total Investments (total cost $893,412) - 99.6%                          938,344
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 0.4%              3,613
- --------------------------------------------------------------------------------
Net Assets - 100%                                                       $941,957
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 10
<PAGE>

Janus Aspen International Growth Portfolio-Portfolio Manager, Helen Young Hayes

Performance Review

Janus Aspen  International  Growth Portfolio gained 18.31% during the first half
of our fiscal year ended June 30, 1997.  The Morgan Stanley  International  EAFE
Index (EAFE stands for Europe,  Australasia,  and the Far East) returned  11.21%
for the same period.(1) Both returns include reinvested net dividends.(2)

Our  research  team  continued  to find  many  excellent  individual  investment
opportunities over the last six months, sometimes in out-of-the-way  industries.
The Fund also owned a number of larger,  better-known  companies,  especially in
Europe. Both helped us beat the EAFE Index.

- --------------------------------------------------------------------------------
Portfolio Profile           June 30, 1997     December 31, 1996
Equities                         97.4%              70.9%
  Foreign                        96.9%              70.8%
Number of Stocks                  257                183
Top 10 Equities                  20.8%              18.3%
Cash & Fixed-Income Securities    2.6%              29.1%
- --------------------------------------------------------------------------------

The Portfolio

Volkswagen is new to the Portfolio and has performed well.  Sales are growing at
a good clip and the company is streamlining  its product lines and cutting costs
dramatically.  Volkswagen has vowed to triple its pretax margins between now and
the year 2000.

Two  German   banks,   Deutsche   Bank  and  DePfa   Bank,   and  Ahrend  NV,  a
Netherlands-based   distributor  of  office  supplies  throughout  Europe,  also
performed well.  DePfa is the largest  mortgage bank in Germany.  Along with its
banking  and  other  business  services,  DePfa  offers  software  for  property
managers,  which allows mortgage and rent payments to be made  electronically to
DePfa's bank, and speeds up the collection cycle. This contributes significantly
to DePfa's  profitability  and  competitive  edge.  Deutsche Bank  dominates the
commercial  banking  business in Germany  and is working to enhance  returns and
profitability by cutting costs and expanding into higher-return businesses.

Management at Ahrend is highly  cost-conscious and has successfully  boosted the
company's operating and profit margins. Ahrend is poised to gain market share on
the  Continent  and  especially in Germany,  where  companies  are  increasingly
realizing the efficiency and cost benefits of outsourcing to a single, preferred
vendor.

Positions   in   Philips    Electronics   and   Lloyds   TSB   were   increased.
Netherlands-based Philips is embarking on its second round of restructuring, led
by an energetic new CEO. His  immediate  plans  include  refocusing  the company
along key strategic  lines,  which will result in the spin-off of incongruous or
unprofitable  divisions.  Lloyds is an extremely  well-run  British bank that is
enjoying the benefits of a merger between  Lloyds and TSB Group.  As a result of
the merger,  Lloyds TSB will be able to take  approximately  10% out of the cost
base of the  combined  banks.  Lloyds  management  is  committed  to  increasing
shareholder value and is using discretionary cash to make strategic acquisitions
and to build the bank's higher-profit, retail financial services.

Finally,  Capita Group is a somewhat unusual beneficiary of the huge outsourcing
wave in Britain. In their attempt to lower costs, municipalities and other local
authorities are outsourcing  services and functions such as the national driving
test to private companies like Capita Group.

U.K.-based  Dorling  Kindersley  proved to be a disappointment  during the first
half. The company  specializes in publishing  children's  educational  books and
interactive  CD-ROMS.  Unfortunately,  the number of major chain  bookstores has
increased  substantially,  while  demand  has  actually  slowed  slightly.  Book
retailers can return unsold books to printers at cost, and the unexpected return
of inventory hurt Dorling Kindersley's results.

International Strategy

With some exceptions,  foreign markets  continue to behave  independently of the
U.S.,  and of each other.  This  diversity,  in addition to the many  attractive
individual  companies  we  continue  to identify  worldwide,  contributes  to my
ongoing  optimism about the potential of  international  investments.  The broad
trend  toward  government  deregulation,  and  a  somewhat  newer  trend  toward
profit-oriented,  shareholder-friendly  corporate management,  should provide an
increasingly healthy climate for global equity markets for some time to come.

Thank you for your  continued  investment  in Janus Aspen  International  Growth
Portfolio.

- --------------------------------------------------------------------------------
(1)  Index and Portfolio returns include reinvested  dividends.  The Portfolio's
     securities may differ significantly from the securities in the index. Index
     returns  do not  include  taxes on  dividends  and  interest  payments,  or
     operating expenses necessary to maintain a portfolio consisting of the same
     securities that are in the index.  The Portfolio's  return does not reflect
     the  charges  and  expenses  of  any  particular  insurance  product.  Past
     performance is no guarantee of future results.

(2)  Net dividends  reinvested  are the  dividends  that remain to be reinvested
     after foreign tax  obligations  have been met. Such  obligations  vary from
     country to country. EAFE stands for Europe, Australasia,  and the Far East.
     Neither  the U.S.  market nor the  emerging  markets of Latin  America  and
     Eastern Europe are represented in EAFE.

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 11
<PAGE>

      Janus Aspen International Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Common Stock - 95.6%
- --------------------------------------------------------------------------------
Aerospace and Defense - 0.3%
     14,125    DONCASTERS PLC*,**                                  $     326,641
- --------------------------------------------------------------------------------
Airlines - 1.2%
     18,916    Deutsche Lufthansa A.G.**                                 363,115
         93    Sairgroup*,**                                             104,365
     12,106    SAS Danmark A/S                                           141,495
     25,080    SAS Norge ASA - Class B                                   265,504
     25,118    SAS Sverige A.B.**                                        305,351
- --------------------------------------------------------------------------------
                                                                       1,179,830
- --------------------------------------------------------------------------------
Apparel Manufacturers - 0.5%
      7,767    Adolfo Dominguez S.A.                                     306,307
      3,150    Gucci Group N.V. - N.Y. Shares**                          202,781
- --------------------------------------------------------------------------------
                                                                         509,088
- --------------------------------------------------------------------------------
Appliances - 1.1%
     15,604    Electrolux A.B. - Series B**                            1,126,048
- --------------------------------------------------------------------------------
Athletic Footwear - 0.5%
      4,214    Adidas A.G.**                                             466,735
- --------------------------------------------------------------------------------
Audio and Video Products - 0.8%
      9,200    Sony Corp.**                                              803,181
- --------------------------------------------------------------------------------
Automotive - Cars and Light Trucks - 3.5%
        383    BMW A.G.**                                                317,164
        231    Mahindra & Mahindra, Ltd. (GDR)*,+                          3,292
     50,000    Mitsubishi Motors Corp.**                                 358,298
        700    Tata Engineering & Locomotive Co., Ltd.                    10,395
      4,873    Tata Engineering & Locomotive Co., Ltd. (GDR)+             72,364
      3,492    Volkswagen A.G.**                                       2,679,319
- --------------------------------------------------------------------------------
                                                                       3,440,832
- --------------------------------------------------------------------------------
Automotive - Truck Parts and Equipment - 0.7%
      4,354    Autoliv A.B.**                                            167,518
     23,000    Denso Corp.**                                             550,730
- --------------------------------------------------------------------------------
                                                                         718,248
- --------------------------------------------------------------------------------
Brewery - 0.8%
     56,800    Fomento Economico Mexicano S.A. de C.V.                   337,393
      7,208    Zaklady Piwowarskie w Zywcu S.A.                          460,611
- --------------------------------------------------------------------------------
                                                                         798,004
- --------------------------------------------------------------------------------
Broadcast Services and Programming - 0.5%
     16,225    Grupo Televisa S.A. (GDR)*                                492,834
- --------------------------------------------------------------------------------
Building - Heavy Construction - 0.3%
      2,364    Grupo Acciona S.A.                                        266,828
- --------------------------------------------------------------------------------
Building and Construction Products - 0.2%
      9,267    Tarkett A.G.**                                            239,315
- --------------------------------------------------------------------------------
Cable Television - 0%
      2,275    TV Filme, Inc.*,**                                         23,603
- --------------------------------------------------------------------------------
Casino Services - 0.2%
     29,925    London Clubs International PLC**                          188,758
- --------------------------------------------------------------------------------
Cellular Telecommunications - 0.2%
      1,465    Millicom International Cellular S.A.*                      69,954
        337    Telecel-Comunicacaoes Pessoais S.A.*                       27,989
     23,319    Telecom Italia Mobile S.p.A.                               74,925
- --------------------------------------------------------------------------------
                                                                         172,868
- --------------------------------------------------------------------------------
Chemicals - Diversified - 2.5%
      6,799    Akzo Nobel**,+                                            933,451
     24,027    BASF A.G.**                                               888,671
     36,771    BOC Group PLC**                                           639,519
- --------------------------------------------------------------------------------
                                                                       2,461,641
- --------------------------------------------------------------------------------
Chemicals - Specialty - 0.5%
        510    Clariant A.G.**                                     $     330,590
        166    SGL Carbon A.G.**,+                                        22,749
     36,142    Victrex PLC**                                             102,858
- --------------------------------------------------------------------------------
                                                                         456,197
- --------------------------------------------------------------------------------
Closed-End Funds - 0.3%
      3,200    Polish National Investment Fund -
                 Privatisation Certificate                               136,326
        185    Romania Investment Fund+                                  180,005
- --------------------------------------------------------------------------------
                                                                         316,331
- --------------------------------------------------------------------------------
Commercial Banks - 2.8%
      2,350    Amtssparekassen Fyn A/S                                   151,688
      2,612    Banco Frances del Rio de la Plata S.A. (ADR)               84,890
    113,134    Bank Handlowy W. Warszawie*,+                           1,304,765
      1,691    BG Bank A/S                                                93,594
    126,896    Credito Italiano S.p.A.                                   231,717
     16,165    Equitable Banking Corp.                                    58,529
      1,619    Jyske Bank A/S                                            139,663
      1,521    Nordbanken A.B.**                                          51,340
        148    Spar Nord Holdings A/S                                      6,919
      2,448    Sparbanken Sverige A.B. - Class A**                        54,454
      3,752    Sydbank A/S                                               171,453
     11,000    Uniao de Bancos Brasileiros S.A. (GDR)*                   408,375
- --------------------------------------------------------------------------------
                                                                       2,757,387
- --------------------------------------------------------------------------------
Commercial Services - 1.2%
     47,393    BTG PLC**                                                 497,709
      4,814    Sophus Berendsen A/S - Class B                            696,975
- --------------------------------------------------------------------------------
                                                                       1,194,684
- --------------------------------------------------------------------------------
Computer Services - 3.6%
      4,879    Axime*,**                                                 577,599
     10,880    Cap Gemini Sogeti S.A.**                                  574,491
    141,400    Capita Group PLC**                                        554,207
      9,883    CMG PLC**                                                 219,922
      7,559    Delphi Group PLC**                                         93,473
     26,651    Enator A.B.*,**                                           475,641
      2,989    Getronics N.V.**                                           96,718
     66,635    Logica PLC**                                              767,987
      3,005    Misys PLC**                                                68,142
        230    Sligos S.A.*,**                                            31,733
      4,060    WM-Data A.B. - Class B**                                   71,409
- --------------------------------------------------------------------------------
                                                                       3,531,322
- --------------------------------------------------------------------------------
Computer Software - 1.9%
    342,084    CI Technologies Group, Ltd.*                              384,405
      5,997    JBA Holdings PLC**                                         87,831
      6,107    Merkantildata A.S.A.                                      122,627
         27    NTT Data Corp.**                                        1,045,268
      2,209    SEMA Group PLC**                                           45,312
      2,518    TT Tieto Oy - Class B**                                   218,145
- --------------------------------------------------------------------------------
                                                                       1,903,588
- --------------------------------------------------------------------------------
Computers - Integrated Systems - 1.2%
      9,325    Dassault Systemes S.A. (ADR)*,**                          664,406
     33,000    Fujitsu, Ltd.**                                           458,533
      6,126    Prosolvia A.B. - B Shares*,**,+                            94,278
- --------------------------------------------------------------------------------
                                                                       1,217,217
- --------------------------------------------------------------------------------
Cosmetics and Toiletries - 3.6%
     77,282    Rhone-Poulenc - Class A**                               3,159,237
     25,000    Shiseido Co., Ltd.**                                      412,916
- --------------------------------------------------------------------------------
                                                                       3,572,153
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 12
<PAGE>

      Janus Aspen International Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Distribution and Wholesale - 0.3%
      6,000    Mitsubishi Corp.**                                  $      74,980
     18,000    Mitsui & Co.**                                            173,032
- --------------------------------------------------------------------------------
                                                                         248,012
- --------------------------------------------------------------------------------
Diversified Financial Services - 0.1%
        886    Compagnie Bancaire S.A.**                                 113,185
- --------------------------------------------------------------------------------
Diversified Operations - 8.4%
     14,664    Amer Group, Ltd.*,**                                      268,196
         71    Barco N.V.                                                 14,398
    546,000    First Pacific Co., Ltd.                                   697,716
     47,802    Hays PLC**                                                454,270
     45,000    Hutchison Whampoa, Ltd.                                   389,169
      1,775    Kinnevik A.B. - Class B**                                  49,469
     20,162    Lagardere S.C.A.**                                        586,219
     10,370    Metra Oy - Class B**                                      312,442
     19,775    Quinenco S.A. (ADR)                                       365,838
    632,251    Rentokil Initial PLC**                                  2,220,259
    105,475    Siebe PLC**                                             1,785,263
        700    South African Breweries, Ltd.**,+                          21,491
        328    Sulzer A.G.**                                             281,236
     44,052    TI Group PLC**                                            383,808
      7,976    VEBA A.G.**                                               448,570
- --------------------------------------------------------------------------------
                                                                       8,278,344
- --------------------------------------------------------------------------------
Drug Delivery Systems - 0.1%
      1,825    Elan Corp. PLC (ADR)*                                      82,581
- --------------------------------------------------------------------------------
Electric - Distribution - 0%
      4,130    Manila Electric Co.                                        20,356
- --------------------------------------------------------------------------------
Electric - Integrated - 1.1%
        900    Centrais Electricas de Santa Catarina S.A. (GDR)+         124,200
  2,900,000    Companhia de Eletricidade do Estado da Bahia*             266,686
      6,425    Companhia Energetica de Minas Gerais (ADR)                326,872
      9,178    Electricidade de Portugal S.A.                            168,638
      5,100    Mosenergo (ADR)*,+                                        211,650
- --------------------------------------------------------------------------------
                                                                       1,098,046
- --------------------------------------------------------------------------------
Electric Products - 2.1%
     37,858    Gewiss S.p.A.                                             647,268
     80,000    Hitachi, Ltd.**                                           894,870
        459    Le Carbone-Lorraine**,+                                   111,800
      2,743    Siemens A.G.**                                            163,003
      4,800    UCAR International, Inc.*                                 219,600
- --------------------------------------------------------------------------------
                                                                       2,036,541
- --------------------------------------------------------------------------------
Electronic Components - 5.4%
     51,598    Electrocomponents PLC**                                   385,147
     42,502    Philips Electronics N.V.**                              3,049,923
     18,725    Philips Electronics N.V. - N.Y. Shares**                1,345,859
     16,526    Pricer A.B. - Class B*,**                                 568,508
- --------------------------------------------------------------------------------
                                                                       5,349,437
- --------------------------------------------------------------------------------
Electronic Measuring Instrument - 0%
        448    Simac Techniek N.V.**                                      38,413
- --------------------------------------------------------------------------------
Engineering - Research and Development - 0.1%
        577    VA Technologies A.G.*                                     105,614
- --------------------------------------------------------------------------------
Film Processing - 0.6%
         12    Fotolabo S.A.**                                             3,828
      3,836    Grand Optical Photoservice**                              582,822
- --------------------------------------------------------------------------------
                                                                         586,650
- --------------------------------------------------------------------------------
Finance - Auto Loans - 0.8%
    510,000    Putra Surya Multidana*                                    812,770
- --------------------------------------------------------------------------------
Finance - Consumer Loans - 1.8%
    143,142    Lloyds TSB Group PLC**                              $   1,467,504
     32,054    Provident Financial PLC**                                 297,145
- --------------------------------------------------------------------------------
                                                                       1,764,649
- --------------------------------------------------------------------------------
Finance - Investment Banker/Broker - 0.6%
      6,260    Compagnie de Suez**                                        15,408
     41,000    Nomura Securities Co., Ltd.**                             566,110
- --------------------------------------------------------------------------------
                                                                         581,518
- --------------------------------------------------------------------------------
Food - Catering - 0.5%
     47,552    Compass Group PLC**,+                                     533,013
- --------------------------------------------------------------------------------
Food - Dairy Products - 0.1%
        449    Koninklijke Nutricia Verenidge Bedrijven N.V.**            71,040
     26,103    Parmalat Finanziaria S.p.A.                                37,126
- --------------------------------------------------------------------------------
                                                                         108,166
- --------------------------------------------------------------------------------
Food - Diversified - 0.5%
        659    Hero A.G.**,+                                             368,409
      1,645    Raision Tehtaat Oy**                                      116,861
- --------------------------------------------------------------------------------
                                                                         485,270
- --------------------------------------------------------------------------------
Food - Meat Products - 0.5%
     56,949    Sardus A.B.*,**,+                                         489,773
- --------------------------------------------------------------------------------
Food - Retail - 0.5%
        419    Carrefour S.A.**                                          304,601
      1,347    Selecta Group, (The) *,**,+                               205,120
- --------------------------------------------------------------------------------
                                                                         509,721
- --------------------------------------------------------------------------------
Healthcare Safety Devices - 0%
      7,250    London International Group PLC**                           20,875
- --------------------------------------------------------------------------------
Home Furnishings - 0.1%
     14,334    Ekornes A.S.A.                                            121,395
- --------------------------------------------------------------------------------
Hotels and Motels - 0.1%
         81    Indian Hotels Co., Ltd. (GDR)*,+                            1,883
      3,106    Sol Melia S.A.                                            127,771
- --------------------------------------------------------------------------------
                                                                         129,654
- --------------------------------------------------------------------------------
Human Resources - 1.1%
     42,507    Brunel International N.V.**,+                             945,891
      6,194    Vedior N.V.*,**,+                                         164,071
- --------------------------------------------------------------------------------
                                                                       1,109,962
- --------------------------------------------------------------------------------
Investment Companies - 0.3%
     12,436    Corp. Financiera Reunida S.A.*                             52,426
        447    FIH A/S - Class B 11,393
        724    Incentive A.B. - Class B**                                 66,198
     13,396    Investment A.B. Bure**                                    168,914
- --------------------------------------------------------------------------------
                                                                         298,931
- --------------------------------------------------------------------------------
Investment Management and Advisory - 0%
      3,743    Colonial, Ltd.*,+                                           9,478
- --------------------------------------------------------------------------------
Lasers - Systems and Components - 0.3%
     15,325    Rofin-Sinar Technologies, Inc.*                           293,091
- --------------------------------------------------------------------------------
Machinery - General Industrial - 0.4%
     35,239    Powerscreen International PLC**                           383,853
- --------------------------------------------------------------------------------
Machinery - Pumps - 0.3%
      9,600    Pfeiffer Vacuum Technology A.G. (ADR)*,**                 279,600
- --------------------------------------------------------------------------------
Manufacturing - 0%
        253    Azkoyen S.A.                                               31,481
- --------------------------------------------------------------------------------
Medical - Biomedical and Genetic - 0.2%
        100    Ares-Serono Group - Class B**                             145,077
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 13
<PAGE>

      Janus Aspen International Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Medical - Drugs - 7.7%
        564    Altana A.G.**                                       $     602,020
     22,231    Astra A.B. - Class A**                                    414,008
      1,000    Eisai Co., Ltd.**                                          18,964
     10,150    Gedeon Richter (GDR)                                      918,575
     59,493    Glaxo Wellcome PLC**                                    1,227,776
        731    Novartis A.G.**                                         1,170,322
     14,743    Orion-Yhtyma Oy - Class B**                               554,893
        128    Roche Holding A.G.**                                    1,159,406
      6,900    Rhone-Poulenc                                             627,038
      3,662    SmithKline Beecham PLC**                                   67,377
        175    SmithKline Beecham PLC (ADR)**                             16,034
     25,000    Takeda Chemical Industries**                              703,487
      2,325    Teva Pharmaceutical Industries, Ltd. (ADR)                150,544
- --------------------------------------------------------------------------------
                                                                       7,630,444
- --------------------------------------------------------------------------------
Medical - Wholesale Drug Distribution - 1.0%
        389    Gehe A.G.**                                                26,565
      6,375    Grupo Casa Autrey S.A. de C.V. (ADR)                      129,492
     34,800    Torii Pharmaceutical Co., Ltd.                            818,072
- --------------------------------------------------------------------------------
                                                                         974,129
- --------------------------------------------------------------------------------
Medical Products - 1.1%
      4,149    Biocompatibles International PLC*,**                       89,871
        412    Fresenius Medical Care A.G.*,**                            29,602
     16,040    Fresenius Medical Care A.G. (ADR)*,**                     467,165
     12,670    Ortivus A.B.*,**                                          517,786
- --------------------------------------------------------------------------------
                                                                       1,104,424
- --------------------------------------------------------------------------------
Metal Processors and Fabricator - 0.9%
     38,662    Assa-Abloy A.B. - Class B**                               790,002
      3,866    Assa-Abloy A.B. - Class B New*,**                          77,496
- --------------------------------------------------------------------------------
                                                                         867,498
- --------------------------------------------------------------------------------
Money Center Banks - 5.9%
     17,089    Banque Nationale de Paris**                               704,991
     19,495    Barclays PLC**                                            386,751
      3,684    Credit Suisse Group**                                     473,814
     35,332    Deutsche Bank A.G.**                                    2,066,147
     14,487    ING Groep N.V.**                                          669,147
     11,000    Mitsubishi Trust and Banking Co., Ltd. **                 173,993
     35,000    Mitsui Trust and Banking Co., Ltd.**                      264,572
      1,364    Societe Generale*,**                                      152,409
     35,000    Sumitomo Trust & Banking Co., Ltd.**                      376,212
        456    UBS**                                                     522,358
      1,035    Unidanmark A/S - Class A                                   58,222
- --------------------------------------------------------------------------------
                                                                       5,848,616
- --------------------------------------------------------------------------------
Mortgage Banks -1.0%
     17,262    Deutsche Pfandbrief und Hypothekenbank A.G.**             993,598
- --------------------------------------------------------------------------------
Motorcycle and Motor Scooter - 0%
        464    Bajaj Auto, Ltd. (GDR)*,+                                  15,590
- --------------------------------------------------------------------------------
Multi-Line Insurance - 2.0%
        145    Baloise Holdings, Ltd.*,**                                346,126
      5,565    Pohjola Insurance Group - Class B**                       164,992
      1,911    Sampo Insurance Co., Ltd. - Class A**                     185,793
     11,164    Skandia Forsakrings A.B.**                                411,483
      2,222    Zurich Versicherungsgesellschaft**                        885,538
- --------------------------------------------------------------------------------
                                                                       1,993,932
- --------------------------------------------------------------------------------
Multilevel Direct Selling - 0.4%
      8,250    Amway Asia Pacific, Ltd.                                  359,906
        600    Nu Skin Asia Pacific, Inc. - Class A*                      15,900
- --------------------------------------------------------------------------------
                                                                         375,806
- --------------------------------------------------------------------------------
Music - 0%
        789    Polygram N.V.**                                            41,477
- --------------------------------------------------------------------------------
Office Automation and Equipment - 0.5%
     11,000    Canon, Inc.**                                       $     299,921
      1,444    Oce N.V.**                                                186,606
- --------------------------------------------------------------------------------
                                                                         486,527
- --------------------------------------------------------------------------------
Office Furnishings - 1.3%
     18,325    Koninklijke Ahrend Groep N.V.**                         1,239,236
- --------------------------------------------------------------------------------
Oil - International Integrated - 0.1%
      1,250    Tatneft (ADR)*,+                                          132,500
- --------------------------------------------------------------------------------
Oil Companies - Exploration and Production - 1.8
     11,891    Elf Aquitaine S.A.**                                    1,284,104
     11,202    MOL Magyar Olaj-es Gazipari Rt. (GDR)+                    250,645
      7,450    YPF S.A. (ADR)                                            229,088
- --------------------------------------------------------------------------------
                                                                       1,763,837
- --------------------------------------------------------------------------------
Oil Companies - Integrated - 0.3%
      3,300    Lukoil Oil Co. (ADR)                                      257,400
- --------------------------------------------------------------------------------
Precious Metals - 0.1%
      4,738    Johnson Matthey PLC**                                      45,657
- --------------------------------------------------------------------------------
Property and Casualty Insurance - 0.4%
     32,000    Tokio Marine & Fire Insurance Co.**                       419,470
- --------------------------------------------------------------------------------
Publishing - Books - 0.1%
      1,129    Wolters Kluwer N.V.**                                     137,717
- --------------------------------------------------------------------------------
Publishing - Newspapers - 0%
      3,174    Pearson PLC**                                              36,740
- --------------------------------------------------------------------------------
Real Estate Investment and Management - 1.9%
     23,800    Castellum A.B.*,**,+                                      178,522
     53,000    Mitsubishi Estate Co., Ltd.**                             768,854
     28,000    Mitsui Fudosan Co., Ltd.**                                386,612
      3,855    NK Cityfastigheter A.B.*,**,+                              27,420
     39,604    Tornet Fastighets A.B.**                                  466,087
- --------------------------------------------------------------------------------
                                                                       1,827,495
- --------------------------------------------------------------------------------
Recreational Vehicles - 0%
      1,000    Yamaha Motor Co., Ltd.**                                    9,962
- --------------------------------------------------------------------------------
Recycling - 0.3%
     16,446    Tomra Systems A.S.A.                                      336,972
- --------------------------------------------------------------------------------
Retail - Apparel and Shoes - 0%
        537    Cortefiel, S.A.                                            23,478
- --------------------------------------------------------------------------------
Retail - Diversified - 0.1%
      1,000    Ryohin Keikaku Co., Ltd.**                                 79,000
- --------------------------------------------------------------------------------
Retail - Hypermarkets - 1.2%
    110,435    Hemkopskedjan A.B. - B Shares**,+                       1,135,431
- --------------------------------------------------------------------------------
Retail - Jewelry - 0.1%
        284    TAG Heuer International S.A.*,**                           42,663
- --------------------------------------------------------------------------------
Retail - Major Department Stores - 0%
      1,000    Isetan Co.*,**                                             12,409
- --------------------------------------------------------------------------------
Retail - Pubs - 0.1%
      2,927    Wetherspoon (J.D.) PLC**                                   65,520
- --------------------------------------------------------------------------------
Retail - Regional Department Stores - 0.1%
     29,849    Harvey Nichols PLC**,+                                    140,588
- --------------------------------------------------------------------------------
Retail - Restaurants - 0.7%
     11,795    Tele Pizza S.A.*                                          696,135
- --------------------------------------------------------------------------------
Rubber - Tires - 1.0%
     11,174    Compagnie Generale des
               Etablissements Michelin - Class B**                       671,665
    138,710    Pirelli S.p.A.                                            349,323
- --------------------------------------------------------------------------------
                                                                       1,020,988
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 14
<PAGE>

      Janus Aspen International Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Security Services - 0.5%
      2,880    Prosegur Companhia de Seguridad S.A.                $      35,249
     17,267    Securitas A.B. - Class B**                                486,811
- --------------------------------------------------------------------------------
                                                                         522,060
- --------------------------------------------------------------------------------
Special Purpose Banks - 0.6%
      1,174    Credit Communal Holding/Dexia+                            126,217
      5,200    Dexia France**                                            506,631
- --------------------------------------------------------------------------------
                                                                         632,848
- --------------------------------------------------------------------------------
Telecommunication Equipment - 2.1%
      2,336    Alcatel Alsthom**                                         292,849
    119,000    Datacraft Asia, Ltd.*                                     378,420
     10,200    MAS Technology, Ltd. (ADR)*                               151,725
     10,293    Oy Nokia A.B. - Class A**                                 776,792
      4,675    Oy Nokia Corp. (ADR) - Class A**                          344,781
      5,384    Tandberg A.S.A.*                                           57,364
     13,712    Tandberg Television A.S.A.*                               102,080
- --------------------------------------------------------------------------------
                                                                       2,104,011
- --------------------------------------------------------------------------------
Telecommunication Services - 3.3%
     23,473    COLT Telecom Group PLC*,**                                120,714
    365,475    Freepages Group PLC*,**                                   218,974
     15,700    Nortel Inversora S.A. (ADR)                               425,863
        974    SK Telecom Co., Ltd. (ADR)                                  9,801
     84,554    Stet-Societa' Finanziaria Telefonica S.p.A.*              492,018
     50,794    Telecom Italia S.p.A.                                     162,845
      4,000    Telefonaktiebolaget L.M. Ericsson - Class B**             157,500
     10,487    Telefonaktiebolaget L.M. Ericsson
                 (ADR) - Class B**                                       412,976
     20,549    Telinfo S.A.                                            1,254,660
- --------------------------------------------------------------------------------
                                                                       3,255,351
- --------------------------------------------------------------------------------
Telephone - Integrated - 2.5%
      5,618    Hellenic Telecommunication Organization S.A.              132,022
        161    Nippon Telegraph & Telephone Corp.**                    1,547,671
        500    Portugal Telecom S.A. (ADR)                                20,063
      4,400    Telecom Argentina Stet S.A. (ADR)                         231,000
      5,075    Telefonica de Argentina S.A. (ADR)                        175,722
     14,050    Telefonica del Peru S.A. (ADR) - Class B*                 367,932
- --------------------------------------------------------------------------------
                                                                       2,474,410
- --------------------------------------------------------------------------------
Television - 0%
        900    CanWest Global Communications Corp.                        13,331
- --------------------------------------------------------------------------------
Textile - Apparel - 0.2%
      2,308    Wolford A.G.                                              224,004
- --------------------------------------------------------------------------------
Tobacco - 0%
      3,500    PT Hanjaya Mandala Sampoerna                               13,351
- --------------------------------------------------------------------------------
Traffic Management Systems - 0.5%
  1,216,000    Jianesu Expressway Co., Ltd.*,+                           431,635
    194,000    Shenzhen Expressway Co. - Class H*,+                       53,212
- --------------------------------------------------------------------------------
                                                                         484,847
- --------------------------------------------------------------------------------
Transportation - Services - 0.5%
      4,292    Koninklijke Nedlloyd Groep N.V.**                         124,203
     37,366    Stagecoach Holdings PLC**                                 394,273
- --------------------------------------------------------------------------------
                                                                         518,476
- --------------------------------------------------------------------------------
Travel Services - 0.3%
         77    Kuoni Reisen A.G. - Class B**                             264,088
- --------------------------------------------------------------------------------
Warehousing & Harbor Transport - 0.3%
  1,360,000    Pacific Ports Co., Ltd.+                                  272,095
- --------------------------------------------------------------------------------
Total Common Stock (cost $83,975,500)                                 94,762,900
- --------------------------------------------------------------------------------
Corporate Bond - 0.7%
- --------------------------------------------------------------------------------
Money Center Banks - 0.7%
  JPY 65,000,000    STB Cayman Capital Ltd.
                      0.50%, 10/1/07**,+ (cost $563,820)           $     646,137
- --------------------------------------------------------------------------------
Preferred Stock - 1.8%
- --------------------------------------------------------------------------------
Automotive - Cars and Light Trucks - 0%
         18    Porsche A.G.**                                             23,965
- --------------------------------------------------------------------------------
Brewery - 0%
     51,000    Companhia Cervejaria Brahma*                               38,846
- --------------------------------------------------------------------------------
Electric - Integrated - 0.4%
     16,000    Centrais Electricas de Santa Catarrina S.A.                23,780
  6,703,000    Companhia Energetica de Minas Gerais                      345,564
  1,000,000    Companhia Paranaense de Energia-Copel*                     18,578
- --------------------------------------------------------------------------------
                                                                         387,922
- --------------------------------------------------------------------------------
Medical Products - 0.1%
        393    Fresenius A.G.*,**                                         89,311
- --------------------------------------------------------------------------------
Oil Companies - Integrated - 0.2%
    779,000    Petroleo Brasileiro S.A.                                  215,636
- --------------------------------------------------------------------------------
Telecommunication Equipment - 0.7%
     10,200    Ericcson Telecomunicacoes S.A.                            606,383
- --------------------------------------------------------------------------------
Telephone - Integrated - 0.4%
      2,725    Telecomunicacoes Brasileiras S.A. (ADR)                   413,519
- --------------------------------------------------------------------------------
Total Preferred Stock (cost $1,323,117)                                1,775,582
- --------------------------------------------------------------------------------
Rights - 0%
        253    Azkoyen S.A.* (cost $0)                                     7,741
- --------------------------------------------------------------------------------
U.S. Government Agency - 4.6%
 $4,580,000    Federal Home Loan Mortgage Corp.
                 5.75%, 7/1/97 (amortized cost $4,580,000)             4,580,000
- --------------------------------------------------------------------------------
Total Investments (total cost $90,442,437) - 102.7%                  101,772,360
- --------------------------------------------------------------------------------
Liabilities, net of Cash,  Receivables and Other Assets - (2.7%)     (2,654,822)
- --------------------------------------------------------------------------------
Net Assets - 100%                                                  $  99,117,538
- --------------------------------------------------------------------------------
See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 15
<PAGE>

      Janus Aspen International Growth Portfolio June 30, 1997 (unaudited)

                       Summary of Investments by Country
                                 June 30, 1997

Country                    % of Investment Securities               Market Value
- --------------------------------------------------------------------------------
Argentina                               1.1%                        $  1,146,561
Australia                               0.4%                             393,882
Austria                                 0.3%                             329,618
Belgium                                 1.4%                           1,395,275
Brazil                                  2.8%                           2,812,040
Canada                                  0.0%                              13,331
Chile                                   0.4%                             365,837
China                                   0.4%                             431,635
Denmark                                 1.4%                           1,471,403
Finland                                 2.9%                           2,942,895
France                                 10.2%                          10,334,149
Germany                                10.0%                          10,166,614
Greece                                  0.1%                             132,022
Hong Kong                               1.7%                           1,772,098
Hungary                                 1.1%                           1,169,219
India                                   0.1%                             103,524
Indonesia                               0.8%                             826,120
Ireland                                 0.1%                              82,581
Israel                                  0.1%                             150,543
Italy                                   2.0%                           1,995,221
Japan                                  11.7%                          11,863,254
Luxembourg                              0.1%                              69,953
Mexico                                  0.9%                             959,719
Netherlands                             9.1%                           9,246,535
New Zealand                             0.1%                             151,725
Norway                                  1.0%                           1,005,941
Peru                                    0.4%                             367,934
Philippines                             0.1%                              78,884
Poland                                  1.9%                           1,901,701
Portugal                                0.2%                             216,689
Romania                                 0.2%                             180,005
Russia                                  0.6%                             601,550
Singapore                               0.4%                             378,420
South Africa                            0.0%                              21,491
South Korea                             0.0%                               9,801
Spain                                   1.5%                           1,547,415
Sweden                                  8.6%                           8,764,424
Switzerland                             6.2%                           6,302,939
United Kingdom                         14.1%                          14,333,787
United States++                         5.6%                           5,735,625
- --------------------------------------------------------------------------------
Total                                 100.0%                        $101,772,360
================================================================================
++ Includes Short-Term Securities (1.1% excluding Short-Term Securities)


                           Forward Currency Contracts
                             Open at June 30, 1997

 Currency Sold and                    Currency       Currency        Unrealized
  Settlement Date                    Units Sold   Value in $ U.S.    Gain/(Loss)
- --------------------------------------------------------------------------------
British Pound 7/24/97                   900,000      $1,497,060      ($  22,500)
British Pound 7/28/97                   600,000         997,920         (27,565)
Dutch Guilder 7/21/97                   500,000         255,115          23,903
Dutch Guilder 7/24/97                 2,200,000       1,122,735          84,563
Dutch Guilder 8/11/97                   375,000         191,630           9,648
Finnish Markka 7/18/97                   12,000           2,314             260
Finnish Markka 7/28/97                   29,000           5,597             546
French Franc 8/4/97                   4,000,000         682,396          48,024
French Franc 8/11/97                  2,500,000         426,694          20,838
French Franc 9/11/97                     43,000           7,354             164
French Franc 11/28/97                 5,000,000         859,697          21,321
German Deutschemark 7/17/97              60,000          34,447           3,772
German Deutschemark 7/21/97           1,000,000         574,317          52,749
German Deutschemark 7/23/97              29,000          16,658           1,407
German Deutschemark 7/24/97             846,000         485,984          36,632
German Deutschemark 8/11/97             200,000         115,048           6,858
Japanese Yen 7/18/97                  3,500,000          30,555             319
Japanese Yen 8/12/97                 59,000,000         515,093         (29,383)
Japanese Yen 9/11/97                  2,000,000          17,462            (604)
Japanese Yen 11/4/97                180,000,000       1,571,662          16,841
Japanese Yen 12/18/97                17,500,000         152,811           5,561
South African Rand 11/3/97               60,000          12,809          (1,319)
Swedish Krona 7/18/97                   585,000          75,896           9,102
Swedish Krona 7/28/97                   464,000          60,225           5,832
Swiss Franc 7/18/97                      50,000          34,303           2,754
Swiss Franc 7/21/97                     600,000         411,805          25,863
Swiss Franc 7/23/97                      35,000          24,028           1,166
Swiss Franc 7/24/97                     400,000         274,650          10,149
Swiss Franc 8/4/97                      450,000         309,427          12,599
Swiss Franc 8/11/97                     400,000         275,274           6,993
Swiss Franc 9/12/97                     300,000         207,225             330
Swiss Franc 11/12/97                     36,000          25,052             754
- --------------------------------------------------------------------------------
Total                                               $11,273,243       $ 327,577
================================================================================

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 16
<PAGE>

 Janus Aspen Worldwide Growth Portfolio - Portfolio Manager, Helen Young Hayes

Performance

Janus Aspen Worldwide  Growth  Portfolio gained 18.92% for the first half of our
fiscal  year ended June 30,  1997,  outperforming  the  Morgan  Stanley  Capital
International  World Index, which returned  15.38%(1).  Both returns include net
dividends reinvested.(2)

The ability to identify and invest in good individual businesses,  regardless of
their geographic location, was the primary reason the Portfolio outperformed the
Morgan Stanley Index. The Portfolio held large, stable,  high-quality  companies
whose  products  are  familiar  names  internationally,  along with a variety of
smaller  and  medium-sized   stocks  that  were  largely  overlooked  by  global
investors.

I remain especially  enthusiastic about opportunities in Europe, where a wave of
corporate restructuring, similar to that in the U.S., is on the rise in a number
of major industries,  including pharmaceuticals,  autos, and manufacturing.  The
coming of the European  Monetary  Union (EMU) is also fueling growth in software
development  and  information  technology  (IT) as Europe  prepares for a single
currency and standardized accounting.

- --------------------------------------------------------------------------------
Portfolio Profile       June 30, 1997     December 31, 1996
Equities                     95.5%              88.1%
  Foreign                    89.2%              78.3%
Number of Stocks              253                209
Top 10 Equities              17.9%              19.8%
Cash & Cash Equivalents       4.5%              11.9%
- --------------------------------------------------------------------------------

Stock Highlights

Volkswagen  is new to the  portfolio  and has  performed  well.  The  company is
experiencing good demand for its automobiles and is cutting costs  dramatically.
Volkswagen has vowed to triple its pretax margins between now and the year 2000.
Other good performers  included Philips,  Cap Gemini,  Getronics,  and Telebras.
Netherlands-based  Philips is  embarking  on its second round of  restructuring,
led by an energetic  new CEO. His  immediate  plans  consist of  refocusing  the
company  along  key  strategic  lines,  which  will  result in the  spin-off  of
incongruous  or  unprofitable  divisions.  French IT  provider  Cap  Gemini  has
experienced tremendous demand for its software as Europe approaches the onset of
the EMU, as well as for its year 2000  solutions.  Longtime  holding  Getronics,
which designs, installs, and maintains computer and telecommunications networks,
has benefited from  excellent  acceptance of its new IT products in the U.S. and
Europe.  Among our emerging market holdings,  Telebras continues to stand out. A
combination  of economic  growth and  tremendous  pent-up  demand for  telephone
service - just 8% of Brazil's population  currently have telephones - is driving
revenues and profits.  Deregulation and improved operating  efficiencies  should
also support strong revenue and earnings growth at Telebras.

Although   the   Portfolio   performed   well   overall,   it  was  not  without
disappointments,    including   LucasVarity   and   Dorling   Kindersley,   both
British-based  businesses.  LucasVarity was the result of the merger between two
highly  complementary auto parts companies,  Lucas and Varity. After the merger,
management set extremely aggressive  integration targets and then fell far short
of achieving them.  Dorling Kindersley  specializes in publishing,  specifically
children's  educational books and interactive CD-ROMS. The number of major chain
bookstores has increased  substantially,  nearly tripling capacity, while demand
has actually slowed  slightly.  Book retailers have the ability to return unsold
books to printers at cost,  and the  unexpected  return of inventory  negatively
impacted Dorling Kindersley's results.

Global Strategy

Foreign equity markets are exhibiting a growing independence  and diversity that
is very  healthy.  Fiscal  restraint  in the public and private  sectors and the
proliferation of shareholder-friendly corporate managers has created a wealth of
solid  growth  companies   around  the  globe.  In  this  excellent   investment
environment, our intensive,  fundamental analysis of individual companies should
continue to uncover a wide range of exceptional opportunities.

Thank  you for  your  continued  investment  in  Janus  Aspen  Worldwide  Growth
Portfolio.

- --------------------------------------------------------------------------------
(1)  Index and Portfolio returns include reinvested  dividends.  The Portfolio's
     securities may differ significantly from the securities in the index. Index
     returns  do not  include  taxes on  dividends  and  interest  payments,  or
     operating expenses necessary to maintain a portfolio consisting of the same
     securities that are in the index.  The Portfolio's  return does not reflect
     the  charges  and  expenses  of  any  particular  insurance  product.  Past
     performance is no guarantee of future results.

(2)  Net dividends  reinvested  are the  dividends  that remain to be reinvested
     after foreign tax  obligations  have been met. Such  obligations  vary from
     country to country.

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 17
<PAGE>

        Janus Aspen Worldwide Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Common Stock - 93.2%
- --------------------------------------------------------------------------------
Aerospace and Defense - 0.1%
     22,550    Boeing Co.                                          $   1,196,559
- --------------------------------------------------------------------------------
Airlines - 1.1%
    235,292    Deutsche Lufthansa A.G.**                               4,516,708
    207,575    Ryanair Holdings PLC (ADR)*                             5,630,472
      2,088    Sairgroup*,**                                           2,343,155
     31,566    SAS Danmark A/S                                           368,944
- --------------------------------------------------------------------------------
                                                                      12,859,279
- --------------------------------------------------------------------------------
Apparel Manufacturers - 0.1%
     24,625    Gucci Group N.V. - N.Y. Shares**                        1,585,234
- --------------------------------------------------------------------------------
Appliances - 1.1%
    191,471    Electrolux A.B. - Series B**                           13,817,328
- --------------------------------------------------------------------------------
Athletic Footwear - 0.5%
     59,030    Adidas A.G.**                                           6,538,059
- --------------------------------------------------------------------------------
Audio and Video Products - 0.9%
    121,700    Sony Corp.**                                           10,624,685
- --------------------------------------------------------------------------------
Automotive - Cars and Light Trucks - 3.5%
      5,386    BMW A.G.**                                              4,460,170
     18,389    Mahindra & Mahindra, Ltd. (GDR)*,+                        262,043
    669,000    Mitsubishi Motors Corp.**                               4,794,021
      6,200    Tata Engineering & Locomotive Co., Ltd.                    92,070
    159,444    Tata Engineering & Locomotive Co., Ltd. (GDR)+          2,367,743
     38,870    Volkswagen A.G.**                                      29,823,917
- --------------------------------------------------------------------------------
                                                                      41,799,964
- --------------------------------------------------------------------------------
Automotive - Truck Parts and Equipment - 0.8%
     56,068    Autoliv A.B.**                                          2,157,192
    302,000    Denso Corp.**                                           7,231,319
- --------------------------------------------------------------------------------
                                                                       9,388,511
- --------------------------------------------------------------------------------
Brewery - 0.4%
    764,900    Fomento Economico Mexicano S.A. de C.V.                 4,543,523
- --------------------------------------------------------------------------------
Broadcast Services and Programming - 0.6%
    249,725    Grupo Televisa S.A. (GDR)*                              7,585,397
- --------------------------------------------------------------------------------
Building - Heavy Construction - 0.2%
     18,141    Grupo Acciona S.A.                                      2,047,600
- --------------------------------------------------------------------------------
Building and Construction Products - 0.2%
     75,348    Tarkett A.G.**                                          1,945,821
- --------------------------------------------------------------------------------
Cable Television - 0.1%
    120,050    TV Filme, Inc.*,**                                      1,245,519
- --------------------------------------------------------------------------------
Casino Services - 0.2%
    389,091    London Clubs International PLC**                        2,454,268
- --------------------------------------------------------------------------------
Cellular Telecommunications - 0.6%
    121,375    Iridum World Communications, Ltd.                       2,199,922
     67,625    Millicom International Cellular S.A.*                   3,229,094
    596,841    Telecom Italia Mobile S.p.A.                            1,917,678
- --------------------------------------------------------------------------------
                                                                       7,346,694
- --------------------------------------------------------------------------------
Chemicals - Diversified - 3.2%
     70,181    Akzo Nobel**,+                                          9,635,317
    295,444    BASF A.G.**                                            10,927,400
    407,340    BOC Group PLC**                                         7,084,431
    263,325    Monsanto Co.                                           11,339,433
- --------------------------------------------------------------------------------
                                                                      38,986,581
- --------------------------------------------------------------------------------
Chemicals - Specialty - 0.6%
      6,651    Clariant A.G.**                                         4,311,277
      7,311    SGL Carbon A.G.**,+                                     1,001,913
    657,041    Victrex PLC**                                           1,869,908
- --------------------------------------------------------------------------------
                                                                       7,183,098
- --------------------------------------------------------------------------------
Commercial Banks - 1.6%
     35,417    Banco Frances del Rio de la Plata S.A. (ADR)        $   1,151,053
  2,481,970    Credito Italiano S.p.A.                                 4,532,166
    229,355    Equitable Banking Corp.                                   830,429
     22,977    Jyske Bank A/S                                          1,982,116
     54,366    Nordbanken A.B.**                                       1,835,079
      2,097    Spar Nord Holdings A/S**                                   98,039
     61,128    Sparbanken Sverige A.B. - Class A**                     1,359,739
     53,250    Sydbank A/S                                             2,433,335
    132,400    Uniao de Bancos Brasileiros S.A. (GDR)*                 4,915,350
- --------------------------------------------------------------------------------
                                                                      19,137,306
- --------------------------------------------------------------------------------
Commercial Services - 1.3%
    627,392    BTG PLC**                                               6,588,703
     10,475    Quintiles Transnational Corp.*                            729,322
     59,150    Sophus Berendsen A/S - Class B                          8,563,782
- --------------------------------------------------------------------------------
                                                                      15,881,807
- --------------------------------------------------------------------------------
Computer Services - 4.3%
     67,841    Axime*,**                                               8,030,954
    137,671    Cap Gemini Sogeti S.A.**                                7,269,371
  1,703,956    Capita Group PLC**                                      6,678,530
     64,431    CMG PLC**                                               1,433,757
     10,775    Computer Sciences Corp.*                                  777,147
    121,314    Delphi Group PLC**                                      1,500,138
     67,778    Enator A.B.*,**                                         1,209,636
    188,844    Getronics N.V.**                                        6,110,639
    653,529    Logica PLC **                                           7,532,103
    264,894    Misys PLC**                                             6,006,760
    270,600    WM-Data A.B. - Class B**                                4,759,415
- --------------------------------------------------------------------------------
                                                                      51,308,450
- --------------------------------------------------------------------------------
Computer Software - 3.4%
    259,287    JBA Holdings PLC**                                      3,797,476
    246,972    Merkantildata A.S.A.                                    4,959,145
        375    NTT Data Corp.**                                       14,517,605
    288,150    Parametric Technology Corp.*                           12,264,384
     45,305    SEMA Group PLC**                                          929,319
     48,895    TT Tieto Oy - Class B**                                 4,235,978
- --------------------------------------------------------------------------------
                                                                      40,703,907
- --------------------------------------------------------------------------------
Computers - Integrated Systems - 0.8%
     17,375    Dassault Systemes S.A. (ADR)*,**                        1,237,969
    433,000    Fujitsu, Ltd.**                                         6,016,515
     92,525    Wang Laboratories, Inc.*                                1,971,939
- --------------------------------------------------------------------------------
                                                                       9,226,423
- --------------------------------------------------------------------------------
Cosmetics and Toiletries - 1.7%
    373,282    Rhone-Poulenc - Class A**                              15,259,523
    344,000    Shiseido Co., Ltd.**                                    5,681,725
- --------------------------------------------------------------------------------
                                                                      20,941,248
- --------------------------------------------------------------------------------
Distribution and Wholesale - 0.3%
     86,000    Mitsubishi Corp.**                                      1,074,718
    251,000    Mitsui & Co.**                                          2,412,828
- --------------------------------------------------------------------------------
                                                                       3,487,546
- --------------------------------------------------------------------------------
Diversified Financial Services - 0.3%
     19,925    Associates First Capital Corp. - Class A                1,105,838
     17,954    Compagnie Bancaire S.A.**                               2,293,587
    104,000    JCG Holdings, Ltd.                                         83,900
- --------------------------------------------------------------------------------
                                                                       3,483,325
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 18
<PAGE>

        Janus Aspen Worldwide Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Diversified Operations - 9.3%
    189,686    Amer Group, Ltd.*,**                                $   3,469,250
     14,445    Barco N.V.                                              2,929,180
    126,475    C.G. Smith, Ltd.**                                        705,499
  5,856,000    First Pacific Co., Ltd.                                 7,483,193
     36,107    Grupo Carso S.A. de C.V. - Series A1                      251,017
  1,419,714    Hays PLC**                                             13,491,759
    618,000    Hutchison Whampoa, Ltd.                                 5,344,585
     53,730    Kinnevik A.B. - Class B**                               1,497,445
    316,685    Lagardere S.C.A.**                                      9,207,753
    191,124    Metra Oy - Class B**                                    5,758,459
  7,240,774    Rentokil Initial PLC **                                25,427,231
  1,137,864    Siebe PLC**                                            19,259,408
     27,841    South African Breweries, Ltd.**,+                         854,773
      6,668    Sulzer A.G.**                                           5,717,323
    583,172    TI Group PLC**                                          5,080,950
     99,679    VEBA A.G.**                                             5,605,941
- --------------------------------------------------------------------------------
                                                                     112,083,766
- --------------------------------------------------------------------------------
Drug Delivery Systems - 0.4%
     98,100    Elan Corp. PLC (ADR)*                                   4,439,025
- --------------------------------------------------------------------------------
Electric - Distribution - 0%
     55,400    Manila Electric Co.                                       273,051
- --------------------------------------------------------------------------------
Electric - Integrated - 0.9%
     96,775    BSES, Ltd. (GDR)+                                       2,516,150
    105,425    Companhia Energetica de Minas Gerais (ADR)              5,363,497
    114,160    Electricidade de Portugal S.A.                          2,097,598
     14,775    Mosenergo (ADR)+                                          613,163
- --------------------------------------------------------------------------------
                                                                      10,590,408
- --------------------------------------------------------------------------------
Electric Products - 1.5%
  1,057,000    Hitachi, Ltd.**                                        11,823,470
      6,647    Le Carbone-Lorraine**,+                                 1,619,028
     36,489    Siemens A.G.**                                          2,168,357
     43,125    UCAR International, Inc.*                               1,972,969
- --------------------------------------------------------------------------------
                                                                      17,583,824
- --------------------------------------------------------------------------------
Electronic Components - 4.8%
    486,613    Electrocomponents PLC**                                 3,632,267
    368,281    Philips Electronics N.V.**                             26,427,667
    298,361    Philips Electronics N.V. - N.Y. Shares**               21,444,697
    176,640    Pricer A.B. - Class B*,**                               6,076,557
- --------------------------------------------------------------------------------
                                                                      57,581,188
- --------------------------------------------------------------------------------
Electronic Components - Semiconductors - 0%
      2,000    Rohm Co.**                                                206,240
- --------------------------------------------------------------------------------
Film Processing - 0.2%
        664    Fotolabo S.A.**                                           211,791
     18,825    Grand Optical Photoservice**                            2,860,174
- --------------------------------------------------------------------------------
                                                                       3,071,965
- --------------------------------------------------------------------------------
Finance - Consumer Loans - 0.6%
    437,111    Provident Financial PLC**                               4,052,085
     27,525    Student Loan Marketing Association                      3,495,675
- --------------------------------------------------------------------------------
                                                                       7,547,760
- --------------------------------------------------------------------------------
Finance - Investment Banker/Broker - 0.5%
    402,000    Nomura Securities Co., Ltd.**                           5,550,641
- --------------------------------------------------------------------------------
Finance - Other Services - 0%
     55,360    Grupo Financiero Inbursa, S.A. de C.V. - Class B          235,233
- --------------------------------------------------------------------------------
Food - Catering - 0.6%
    649,644    Compass Group PLC**,+                                   7,281,899
- --------------------------------------------------------------------------------
Food - Dairy Products - 0.7%
     31,701    Koninklijke Nutricia Verenidge Bedrijven N. V.**        5,015,669
  2,397,331    Parmalat Finanziaria S.p.A.                             3,409,662
- --------------------------------------------------------------------------------
                                                                       8,425,331
- --------------------------------------------------------------------------------
Food - Diversified - 0.5%
      2,495    Hero A.G.**,+                                       $   1,394,811
     58,521    Raision Tehtaat Oy**                                    4,157,333
- --------------------------------------------------------------------------------
                                                                       5,552,144
- --------------------------------------------------------------------------------
Food - Retail - 0.4%
      5,466    Carrefour S.A.**                                        3,973,623
     25,175    Disco S.A. (ADR)*                                         997,559
- --------------------------------------------------------------------------------
                                                                       4,971,182
- --------------------------------------------------------------------------------
Healthcare Safety Devices - 0.1%
    401,066    London International Group PLC**                        1,154,765
- --------------------------------------------------------------------------------
Home Furnishings - 0.4%
    257,727    Ekornes A.S.A.                                          2,182,697
     27,200    Hunter Douglas N.V.**                                   2,318,353
- --------------------------------------------------------------------------------
                                                                       4,501,050
- --------------------------------------------------------------------------------
Hotels and Motels - 0.1%
     13,449    Indian Hotels Co., Ltd.*,+                                312,689
     33,608    Sol Melia S.A.                                          1,382,527
- --------------------------------------------------------------------------------
                                                                       1,695,216
- --------------------------------------------------------------------------------
Human Resources - 0.6%
     51,250    Manpower, Inc.                                          2,280,625
      7,477    Randstad Holdings N.V.                                    789,936
     33,750    Robert Half International, Inc.*                        1,588,359
     79,751    Vedior N.V.*,**,+                                       2,112,505
- --------------------------------------------------------------------------------
                                                                       6,771,425
- --------------------------------------------------------------------------------
Investment Companies - 0.3%
     90,096    Corp. Financiera Reunida S.A.*                            379,816
      6,349    FIH A/S - Class B                                         161,820
     19,457    Incentive A.B. - Class B**                              1,779,025
    106,928    Investment A.B. Bure**                                  1,348,289
- --------------------------------------------------------------------------------
                                                                       3,668,950
- --------------------------------------------------------------------------------
Investment Management and Advisors - 0%
     51,058    Colonial, Ltd.*,+                                         129,284
- --------------------------------------------------------------------------------
Machinery - General Industrial - 0.3%
    384,498    Powerscreen International PLC**                         4,188,277
- --------------------------------------------------------------------------------
Machinery - Pumps - 0%
      8,000    Pfeiffer Vacuum Technology A.G. (ADR)*,**                 233,000
- --------------------------------------------------------------------------------
Manufacturing - 0%
      3,992    Azkoyen S.A.                                              496,727
- --------------------------------------------------------------------------------
Medical - Biomedical and Genetic - 0.2%
      1,431    Ares-Serono Group - Class B**                           2,076,047
- --------------------------------------------------------------------------------
Medical - Drugs - 7.1%
      7,150    Altana A.G.**                                           7,631,989
    183,356    Astra A.B. - Class A**                                  3,414,630
    137,300    Bristol-Myers Squibb Co.                               11,121,300
    117,200    Eisai Co., Ltd.**                                       2,222,528
    435,238    Glaxo Wellcome PLC**                                    8,982,146
     11,297    Novartis A.G.**                                        18,086,359
      2,375    Pfizer, Inc.                                              283,813
      1,970    Roche Holding A.G.**                                   17,843,983
    228,720    SmithKline Beecham PLC**                                4,208,182
     12,050    SmithKline Beecham PLC (ADR)**                          1,104,081
    314,000    Takeda Chemical Industries**                            8,835,792
     33,875    Teva Pharmaceutical Industries, Ltd. (ADR)              2,193,406
- --------------------------------------------------------------------------------
                                                                      85,928,209
- --------------------------------------------------------------------------------
Medical - Wholesale Drug Distribution - 0.4%
     24,048    Gehe A.G.**                                             1,642,270
    175,325    Grupo Casa Autrey S.A. de C.V. (ADR)                    3,561,289
- --------------------------------------------------------------------------------
                                                                       5,203,559
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 19
<PAGE>

        Janus Aspen Worldwide Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Medical Instruments - 0.1%
     16,400    Boston Scientific Corp.*                            $   1,007,575
- --------------------------------------------------------------------------------
Medical Products - 1.5%
     57,695    Biocompatibles International PLC*,**                    1,249,724
     11,099    Fresenius Medical Care A.G.*                              797,456
    313,425    Fresenius Medical Care A.G. (ADR)*,**                   9,128,503
    163,862    Ortivus A.B.*,**                                        6,696,567
- --------------------------------------------------------------------------------
                                                                      17,872,250
- --------------------------------------------------------------------------------
Metal Processors and Fabricator - 1.0%
    561,355    Assa-Abloy A.B. - Class B**                            11,470,479
     56,135    Assa-Abloy A.B. - Class B New*,**                       1,125,258
- --------------------------------------------------------------------------------
                                                                      12,595,737
- --------------------------------------------------------------------------------
Money Center Banks - 8.1%
     31,500    BankAmerica Corp.                                       2,033,719
    227,368    Banque Nationale de Paris**                             9,379,855
    382,853    Barclays PLC**                                          7,595,212
     43,300    Citicorp                                                5,220,356
     52,093    Credit Suisse Group**                                   6,699,892
    332,600    Deutsche Bank A.G.**                                   19,449,801
    272,563    ING Groep N.V.**                                       12,589,534
    996,570    Lloyds TSB Group PLC**                                 10,216,923
    151,000    Mitsubishi Trust and Banking Co., Ltd **                2,388,446
    484,000    Mitsui Trust and Banking Co., Ltd.**                    3,658,655
     27,432    Societe Generale*,**                                    3,065,166
    489,000    Sumitomo Trust & Banking Co., Ltd.**                    5,256,225
      7,936    UBS**                                                   9,090,867
      7,873    Unidanmark A/S - Class A                                  442,883
- --------------------------------------------------------------------------------
                                                                      97,087,534
- --------------------------------------------------------------------------------
Mortgage Banks - 1.0%
    210,468    Deutsche Pfandbrief und Hypothekenbank A.G.**          12,114,507
- --------------------------------------------------------------------------------
Motorcycle and Motor Scooter - 0%
      6,680    Bajaj Auto, Ltd. (GDR)*,+                                 224,448
- --------------------------------------------------------------------------------
Multi-Line Insurance - 2.2%
      1,775    Baloise Holdings, Ltd.*,**                              4,237,061
    111,549    Pohjola Insurance Group - Class B**                     3,307,220
     24,523    Sampo Insurance Co., Ltd. - Class A**                   2,384,195
    147,984    Skandia Forsakrings A.B.**                              5,454,394
     28,607    Zurich Versicherungsgesellschaft**                     11,400,807
- --------------------------------------------------------------------------------
                                                                      26,783,677
- --------------------------------------------------------------------------------
Multilevel Direct Selling - 0%
      2,850    Nu Skin Asia Pacific, Inc. - Class A*                      75,525
- --------------------------------------------------------------------------------
Music - 0%
     10,831    Polygram N.V.**                                           569,377
- --------------------------------------------------------------------------------
Office Automation and Equipment - 0.7%
    166,000    Canon, Inc.**                                           4,526,085
     48,700    Danka Business Systems PLC (ADR)**                      1,990,613
     15,885    Oce N.V.**                                              2,052,793
- --------------------------------------------------------------------------------
                                                                       8,569,491
- --------------------------------------------------------------------------------
Office Furnishings - 1.1%
    193,883    Koninklijke Ahrend Groep N.V.**                        13,111,422
- --------------------------------------------------------------------------------
Oil - International Integrated - 0.3%
     30,400    Tatneft (ADR)*,+                                        3,222,400
- --------------------------------------------------------------------------------
Oil Companies - Exploration and Production - 2.2%
    151,645    Elf Aquitaine S.A.**                                   16,376,082
    151,423    MOL Magyar Olaj-es Gazipari Rt. (GDR)+                  3,388,090
    198,750    YPF S.A. (ADR)                                          6,111,563
- --------------------------------------------------------------------------------
                                                                      25,875,735
- --------------------------------------------------------------------------------
Oil Companies - Integrated - 0.2%
     34,725    Lukoil Holding (ADR)                                    2,708,550
- --------------------------------------------------------------------------------
Pharmacy Services - 0.1%
     25,600    Omnicare, Inc.                                      $     803,200
- --------------------------------------------------------------------------------
Precious Metals - 0%
     49,770    Johnson Matthey PLC**                                     479,599
- --------------------------------------------------------------------------------
Property and Casualty Insurance - 0.5%
    439,000    Tokio Marine & Fire Insurance Co.**                     5,754,608
- --------------------------------------------------------------------------------
Publishing - Books - 0.2%
     19,744    Wolters Kluwer N.V.**                                   2,408,392
- --------------------------------------------------------------------------------
Publishing - Newspapers - 0.1%
     61,395    Pearson PLC**                                             710,660
- --------------------------------------------------------------------------------
Real Estate Investment and Management - 1.7%
    728,000    Mitsubishi Estate Co. Ltd.**                           10,560,864
    386,000    Mitsui Fudosan Co., Ltd.**                              5,329,720
     58,332    NK Cityfastigheter A.B.*,**,+                             414,912
    316,497    Tornet Fastighets A.B.**                                3,724,756
- --------------------------------------------------------------------------------
                                                                      20,030,252
- --------------------------------------------------------------------------------
Recreational Vehicles - 0%
     17,000    Yamaha Motor Co., Ltd.**                                  169,361
- --------------------------------------------------------------------------------
Recycling - 0.4%
    207,147    Tomra Systems A.S.A.                                    4,244,355
- --------------------------------------------------------------------------------
Retail - Apparel and Shoes - 0%
      7,894    Cortefiel, S.A.                                           345,131
- --------------------------------------------------------------------------------
Retail - Diversified - 0.2%
     30,800    Ryohin Keikaku Co., Ltd.**                              2,433,207
- --------------------------------------------------------------------------------
Retail - Jewelry - 0.1%
      3,607    TAG Heuer International S.A.*,**                          541,848
- --------------------------------------------------------------------------------
Retail - Major Department Stores - 0.1%
     51,000    Isetan Co.**                                              632,876
- --------------------------------------------------------------------------------
Retail - Pubs - 0.2%
    101,901    Wetherspoon (J.D.) PLC**                                2,281,037
- --------------------------------------------------------------------------------
Retail - Regional Department Stores - 0.1%
    194,690    Harvey Nichols PLC**,+                                    916,984
- --------------------------------------------------------------------------------
Retail - Restaurants - 0.9%
    187,936    Tele Pizza, S.A.*                                      11,091,887
- --------------------------------------------------------------------------------
Rubber - Tires - 0.7%
    109,402    Compagnie Generale des Etablissements
                 Michelin - Class B**                                  6,576,118
    680,618    Pirelli S.p.A.                                          1,714,045
- --------------------------------------------------------------------------------
                                                                       8,290,163
- --------------------------------------------------------------------------------
Satellite Telecommunications - 0.1%
     55,450    Globalstar Telecommunications, Ltd.*                    1,698,156
- --------------------------------------------------------------------------------
Security Services - 0.6%
    149,740    Prosegur Companhia de Seguridad S.A.                    1,832,678
    210,288    Securitas A.B. - Class B**                              5,928,678
- --------------------------------------------------------------------------------
                                                                       7,761,356
- --------------------------------------------------------------------------------
Special Purpose Banks - 0.5%
     29,337    Credit Communal Holding/Dexia+                          3,154,033
     31,529    Dexia France**                                          3,071,842
- --------------------------------------------------------------------------------
                                                                       6,225,875
- --------------------------------------------------------------------------------
Super-Regional Banks - 0.7%
     31,450    Wells Fargo & Co.                                       8,475,775
- --------------------------------------------------------------------------------
Telecommunication Equipment - 1.9%
     35,413    Alcatel Alsthom**                                       4,439,491
     76,800    Lucent Technologies, Inc.                               5,534,400
     71,809    Oy Nokia A.B. - Class A**                               5,419,281
     69,550    Oy Nokia Corp. (ADR) - Class A**                        5,129,313
     84,339    Tandberg A.S.A.*                                          898,597
    214,784    Tandberg Television A.S.A.*                             1,598,970
- --------------------------------------------------------------------------------
                                                                      23,020,052
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 20
<PAGE>

        Janus Aspen Worldwide Growth Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Telecommunication Services - 2.9%
    576,527    COLT Telecom Group PLC*,**$                             2,964,898
  6,923,325    Freepages Group PLC*,**                                 4,148,096
    194,950    Nortel Inversora S.A.(ADR)                              5,288,019
     38,995    SK Telecom Co., Ltd. (ADR)                                392,391
  1,056,722    Stet Societa' Finanziaria Telefonica S.p.A.*            6,149,047
  1,031,493    Telecom Italia S.p.A.                                   3,306,961
    134,505    Telefonaktiebolaget L.M. Ericsson - Class B**           5,296,788
    122,825    Telefonaktiebolaget L.M. Ericsson (ADR)
                 - Class B**                                           4,836,234
    854,131    Telefonica del Peru S.A. - Class B                      2,238,922
- --------------------------------------------------------------------------------
                                                                      34,621,356
- --------------------------------------------------------------------------------
Telephone - Integrated - 3.0%
     69,897    Hellenic Telecommunication Organization S.A.+           1,642,568
      2,170    Nippon Telegraph & Telephone Corp.**                   20,859,909
     41,400    Telecom Argentina Stet S.A. (ADR)                       2,173,500
    107,750    Telefonica de Argentina S.A. (ADR)                      3,730,844
    295,900    Telefonica del Peru S.A. (ADR) - Class B                7,748,881
- --------------------------------------------------------------------------------
                                                                      36,155,702
- --------------------------------------------------------------------------------
Telephone - Local - 0.1%
     21,900    Cincinnati Bell, Inc.                                     689,850
- --------------------------------------------------------------------------------
Television - 0.2%
     71,025    CanWest Global Communications Corp                      1,052,058
     36,760    Central European Media Enterprises, Ltd. (ADR)*,**        955,760
- --------------------------------------------------------------------------------
                                                                       2,007,818
- --------------------------------------------------------------------------------
Textile - Apparel - 0.3%
     39,374    Wolford A.G.                                            3,821,468
- --------------------------------------------------------------------------------
Tobacco - 0.2%
    228,000    PT Hanjaya Mandala Sampoerna                              869,710
    144,228    Souza Cruz S.A.                                         1,520,590
- --------------------------------------------------------------------------------
                                                                       2,390,300
- --------------------------------------------------------------------------------
Traffic Management Systems - 0.1%
  3,042,000    Shenzhen Expressway Co. - Class H*,+                      834,390
- --------------------------------------------------------------------------------
Transportation - Services - 0.8%
     55,289    Koninklijke Nedlloyd Groep N.V.**                       1,599,985
    715,874    Stagecoach Holdings PLC**                               7,553,660
- --------------------------------------------------------------------------------
                                                                       9,153,645
- --------------------------------------------------------------------------------
Travel Services - 0.3%
      1,161    Kuoni Reisen A.G. - Class B**                           3,981,891
- --------------------------------------------------------------------------------
Total Common Stock (cost $941,156,564)                             1,120,547,720
- --------------------------------------------------------------------------------
Preferred Stock - 2.3%
- --------------------------------------------------------------------------------
Automotive - Cars and Light Trucks - 0.1%
        649    Porsche A.G.                                              864,075
- --------------------------------------------------------------------------------
Brewery - 0.1%
  1,593,000    Companhia Cervejaria Brahma*                            1,213,378
- --------------------------------------------------------------------------------
Electric - Integrated - 0.5%
    226,000    Centrais Electricas de Santa Catarina S.A.                335,888
108,780,000    Companhia Energetica de Minas Gerais                    5,608,008
 23,000,000    Companhia Paranaense de Energia-Copel*                    427,292
- --------------------------------------------------------------------------------
                                                                       6,371,188
- --------------------------------------------------------------------------------
Medical Products - 0.4%
     20,565    Fresenius A.G.*,**                                      4,673,504
- --------------------------------------------------------------------------------
Oil Companies - Integrated - 0.3%
 14,254,000    Petroleo Brasileiro S.A.                                3,945,660
- --------------------------------------------------------------------------------
Telecommunication Equipment - 0%
  4,000,000    Ericcson Telecomunicacoes S.A.                      $     237,797
- --------------------------------------------------------------------------------
Telephone - Intergrated - 0.9%
     68,425    Telecomunicacoes Brasileiras S.A.                      10,383,494
- --------------------------------------------------------------------------------
Total Preferred Stock(cost $17,096,401)                               27,689,096
- --------------------------------------------------------------------------------
Rights - 0%
- --------------------------------------------------------------------------------
Manufacturing - 0%
      3,992    Azkoyen S.A.* (cost $0)                                   122,146
- --------------------------------------------------------------------------------
Total  Investments  (total cost $958,252,965) - 95.5%              1,148,358,962
- --------------------------------------------------------------------------------
Cash, Receivables, and Other Assets, net of Liabilities - 4.5%        53,946,523
- --------------------------------------------------------------------------------
Net Assets - 100%                                                 $1,202,305,485
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 21
<PAGE>

        Janus Aspen Worldwide Growth Portfolio June 30, 1997 (unaudited)

                       Summary of Investments by Country
                                 June 30, 1997

Country                    % of Investment Securities               Market Value
- --------------------------------------------------------------------------------
Argentina                               1.7%                      $   19,452,537
Australia                               0.0%                             129,284
Austria                                 0.3%                           3,821,468
Belgium                                 0.5%                           6,083,212
Bermuda                                 0.2%                           2,199,922
Brazil                                  3.1%                          35,196,472
Canada                                  0.1%                           1,052,057
Denmark                                 1.2%                          14,050,918
Finland                                 3.0%                          33,861,028
France                                  8.2%                          94,660,535
Germany                                10.8%                         124,479,152
Greece                                  0.2%                           1,642,567
Hong Kong                               1.2%                          13,746,067
Hungary                                 0.3%                           3,388,089
India                                   0.5%                           5,775,143
Indonesia                               0.1%                             869,709
Ireland                                 0.9%                          10,069,496
Israel                                  0.2%                           2,193,406
Italy                                   1.8%                          21,029,560
Japan                                  12.4%                         142,562,045
Luxembourg                              0.3%                           3,229,094
Mexico                                  1.4%                          16,176,459
Netherlands                             9.4%                         107,771,521
Norway                                  1.2%                          13,883,762
Peru                                    0.9%                           9,987,803
Philippines                             0.1%                           1,103,479
Portugal                                0.2%                           2,097,598
Russia                                  0.6%                           6,544,112
South Africa                            0.1%                           1,560,272
South Korea                             0.0%                             392,391
Spain                                   1.5%                          17,698,510
Sweden                                  7.3%                          84,202,402
Switzerland                             7.7%                          87,937,111
United Kingdom                         16.0%                         183,845,862
United States++                         6.6%                          75,665,919
- --------------------------------------------------------------------------------
Total                                 100.0%                      $1,148,358,962
================================================================================
++ No Short-Term Securities held at June 30, 1997.


                           Forward Currency Contracts
                             Open at June 30, 1997

Currency Sold and                     Currency        Currency       Unrealized
 Settlement Date                     Units Sold    Value in $ U.S.   Gain/(Loss)
- --------------------------------------------------------------------------------
British Pound 7/24/97                 9,000,000     $14,970,600      ($ 225,000)
British Pound 7/28/97                13,500,000      22,453,200        (620,204)
Dutch Guilder 7/24/97                30,000,000      15,310,028       1,153,136
Dutch Guilder 8/11/97                 6,500,000       3,321,580         167,229
Finnish Markka 7/18/97                4,000,000         771,382          86,619
Finnish Markka 7/28/97                4,200,000         810,670          79,123
Finnish Markka 11/12/97               1,768,000         343,982           7,090
French Franc 7/18/97                  5,500,000         937,127         101,644
French Franc 8/4/97                  60,000,000      10,235,938         720,364
French Franc 8/11/97                 38,000,000       6,485,749         316,729
French Franc 11/28/97                30,000,000       5,158,184         127,927
German Deutschemark 7/17/97           5,000,000       2,870,594         314,323
German Deutschemark 7/21/97          10,000,000       5,743,166         527,488
German Deutschemark 7/23/97             300,000         172,325          14,556
German Deutschemark 7/24/97          12,536,000       7,201,287         557,045
German Deutschemark 8/11/97           7,500,000       4,314,312         257,186
German Deutschemark 9/11/97           2,600,000       1,498,991          32,493
Japanese Yen 7/18/97              1,237,000,000      10,799,070         112,587
Japanese Yen 8/12/97                600,000,000       5,238,230        (304,426)
Japanese Yen 9/11/97                100,000,000         873,075         (30,217)
Japanese Yen 11/4/97                950,000,000       8,294,879         230,653
Japanese Yen 12/18/97               250,000,000       2,183,008          79,436
South African Rand 11/3/97            4,248,000         906,898         (93,416)
Swedish Krona 7/18/97                25,000,000       3,243,425         389,239
Swedish Krona 7/23/97                22,000,000       2,854,844         274,601
Swedish Krona 7/28/97                23,662,000       3,071,232         296,433
Swiss Franc 7/18/97                   6,000,000       4,116,356         330,493
Swiss Franc 7/23/97                   2,500,000       1,716,326          83,271
Swiss Franc 7/24/97                   6,000,000       4,119,747         152,236
Swiss Franc 8/4/97                    7,000,000       4,813,312         195,991
Swiss Franc 8/11/97                   6,000,000       4,129,103         104,895
Swiss Franc 9/12/97                   7,000,000       4,835,256           7,694
Swiss Franc 11/12/97                  1,020,000         709,812          21,371
- --------------------------------------------------------------------------------
Total                                              $164,503,688      $5,468,589
================================================================================

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 22
<PAGE>

     Janus Aspen Balanced Portfolio - Portfolio Manager, Blaine P. Rollins

Portfolio Performance

The  financial  markets  posted  substantial  gains during the first half of the
year,  ended June 30, 1997.  After a brief  decline in March,  the S&P 500 Index
climbed to new  records,  and gained  20.60%  for the  period,  while the Lehman
Brothers  Government/Corporate  Bond  Index rose  2.74%.  Janus  Aspen  Balanced
Portfolio appreciated 12.32%(1). All returns include reinvested dividends.

The powerful rally in stocks was supported by signs of moderate  economic growth
in the second  quarter,  and by  continued  low  inflation.  During the  period,
Portfolio  strategy  continued to  concentrate  on  high-quality  companies that
generate  significant amounts of discretionary cash and use it prudently - often
to buy back their own shares. However, until the market decline in March, it was
hard to find many  inexpensive  opportunities.  The spring sell-off  cleared the
air,  and I was able to establish  new  positions as well as add to our existing
holdings.

Given the  volatility  of  interest  rates,  fixed-income  maturities  were kept
relatively  short,  mostly  in the two- to  five-year  range.  Our  fixed-income
securities   consist  of  a  diverse  mix  of  Treasuries,   convertible  bonds,
investment-grade  and high-yield  corporate  bonds,  and preferred  stocks.  Our
high-quality  corporates and Treasuries provide income and portfolio  stability,
while the  convertibles and high-yield  securities  produce income and allow for
capital appreciation potential as the issuing companies' fundamentals improve.

Predictable  earnings  growth  remains  the focus of our  equity  holdings.  Our
financial  companies  are  especially  exciting.  Included in this group are new
positions in small thrifts,  which are selling shares to the public,  often very
inexpensively. Finally, the decline in technology stocks provided an opportunity
to add companies that have built durable, often dominant, market positions.

- --------------------------------------------------------------------------------
Portfolio Asset Mix            June 30, 1997     December 31, 1996
Equities                            52.8%              50.3%
Number of Stocks                     145                103
Top 10 Equities                     12.2%              24.0%
Fixed-Income Securities               23                 32
  U.S. Treasury Bonds               15.4%              15.7%
  Investment-Grade Corp. Bonds       6.4%              16.0%
  High-Yield Corporate Bonds        13.9%               5.6%
Preferred Stock                      5.4%               3.6%
Cash & Cash Equivalents              6.1%               8.8%
- --------------------------------------------------------------------------------
                                                
Portfolio Highlights

During the first half, Dionex,  which manufactures ion chromatography  equipment
used in color spectrum  analysis,  continued to use excess cash flow to buy back
shares,  while carefully  managing its expenditures  and  investments.  Consumer
lender Associates First Capital is also still exceeding our expectations in both
earnings and asset growth.

Discount  broker  Charles  Schwab  was  increased,  as were  positions  in small
financial  institutions.  Schwab  continues  to capture  market share and gather
assets through the  distribution of mutual funds and other  financial  products.
Many small financial  institutions are cheap relative to their capital structure
and earnings  potential.  They are  distributing  extra cash to  shareholders as
dividends or through  share  buybacks.  Standard  Financial  is being  acquired,
another  example of the  consolidation  wave that is also  rolling  through  the
industry.

Important additions this half included Nationwide Financial Services and DuPont.
Nationwide is a newly public company spun off from Nationwide  Insurance.  It is
one of the top  three  participants  in the  rapidly  growing  variable  annuity
market. New senior management at DuPont is increasing returns by lowering costs,
fixing broken businesses, and allocating capital to high-return operations.

Both  disability  insurer UNUM and banking giant Wells Fargo were reduced.  They
have  been  terrific  performers.  At  Wells  Fargo,  the  integration  of First
Interstate, an important acquisition,  was taking longer than we anticipated.  I
took losses in Heritage Media and U.S. Satellite  Broadcasting (USSB).  Heritage
was a  frustrating  situation.  I sold  Heritage  after it missed  its  earnings
target,  but then the  company  was  acquired.  At USSB,  subscriber  demand for
satellite TV was less than I expected.

Dade  International  is  an  attractive  high-yield  bond  we  own.  Dade  makes
diagnostic  equipment used by hospitals to test blood and tissue.  Dade recently
purchased  the  diagnostic   equipment  division  of  Hoechst,  a  large  German
conglomerate.

Current Outlook

It appears the economy has moderated after a first-quarter growth spurt. As long
as interest rates remain stable, our fixed-income  holdings and financial stocks
should  continue to perform well. Our financial  companies have the potential to
achieve growth rates in the high teens, while trading at ten to twelve times our
1998 earnings estimates - or just 50% to 60% of the current market multiple.
In  short,  the  long-term  earnings  outlook  for the  Portfolio  remains  very
encouraging.

Thank you for your continued investment in Janus Aspen Balanced Portfolio.

- --------------------------------------------------------------------------------
(1)  Index and Portfolio returns include reinvested  dividends.  The Portfolio's
     securities may differ significantly from the securities in the index. Index
     returns  do not  include  taxes on  dividends  and  interest  payments,  or
     operating expenses necessary to maintain a portfolio consisting of the same
     securities that are in the index.  The Portfolio's  return does not reflect
     the  charges  and  expenses  of  any  particular  insurance  product.  Past
     performance is no guarantee of future results.

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 23
<PAGE>

            Janus Aspen Balanced Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Common Stock - 52.8%
- --------------------------------------------------------------------------------
Apparel Manufacturers - 0.5%
     14,350    St. John Knits, Inc.                                $     774,900
- --------------------------------------------------------------------------------
Automotive - Truck Parts and Equipment - 0.3
     14,975    Federal-Mogul Corp.                                       524,125
- --------------------------------------------------------------------------------
Cable Television - 0.2%
     22,425    Tele-Communications, Inc. - Class A*                      333,572
- --------------------------------------------------------------------------------
Chemicals - Diversified - 2.0%
     34,125    Airgas, Inc.*                                             676,102
     19,959    BASF A.G.                                                 738,211
     35,545    BOC Group PLC**                                           618,196
     20,850    E.I. du Pont de Nemours and Co.                         1,310,944
- --------------------------------------------------------------------------------
                                                                       3,343,453
- --------------------------------------------------------------------------------
Commercial Banks - 2.1%
      7,150    Cascade Bancorp                                           286,000
     11,375    Chester Bancorp, Inc.                                     167,781
     20,000    Community Financial Corp.                                 290,000
      8,125    First Savings Bancorp, Inc.                               180,781
      7,500    Northern Trust Corp.                                      362,812
     28,425    Star Banc Corp.                                         1,200,956
     20,725    State Street Corp.                                        958,531
      6,775    Sterling Bancorp                                          126,184
- --------------------------------------------------------------------------------
                                                                       3,573,045
- --------------------------------------------------------------------------------
Commercial Services - 0.3%
     11,600    First USA Paymentech, Inc.*                               335,675
        114    SGS Societe Generale de Surveillance                      243,976
- --------------------------------------------------------------------------------
                                                                         579,651
- --------------------------------------------------------------------------------
Computer Software - 0.9%
     36,600    Parametric Technology Corp.*                            1,557,787
- --------------------------------------------------------------------------------
Computers - Integrated Systems - 0.5%
     39,725    Wang Laboratories, Inc.*                                  846,639
- --------------------------------------------------------------------------------
Consumer Products - 0.3%
     18,850    Gibson Greetings, Inc.*                                   424,125
- --------------------------------------------------------------------------------
Containers - Paper and Plastic - 0.4%
     12,400    Sealed Air Corp.*                                         589,000
- --------------------------------------------------------------------------------
Cosmetics and Toiletries - 0.8%
     10,800    Avon Products, Inc.                                       762,075
     16,031    Rhone-Poulenc - Class A*                                  655,337
- --------------------------------------------------------------------------------
                                                                       1,417,412
- --------------------------------------------------------------------------------
Cruise Lines - 1.0%
     23,550    Carnival Corp. - Class A                                  971,437
     20,675    Royal Caribbean Cruises, Ltd.                             722,333
- --------------------------------------------------------------------------------
                                                                       1,693,770
- --------------------------------------------------------------------------------
Diversified Financial Services - 0.8%
     24,250    Associates First Capital Corp. - Class A                1,345,875
- --------------------------------------------------------------------------------
Diversified Operations - 2.4%
     26,733    Asko OY - Class A                                         493,049
     11,525    Minnesota Mining and Manufacturing Co.                  1,175,550
     26,064    Siebe PLC**                                               441,157
      4,350    Unilever N.V. - N.Y. Shares                               948,300
     43,050    Westinghouse Electric Corp.                               995,531
- --------------------------------------------------------------------------------
                                                                       4,053,587
- --------------------------------------------------------------------------------
Electronic Components - 0.7%
     14,284    Philips Electronics N.V.                                1,025,013
      1,700    Philips Electronics N.V. - N.Y. Shares                    122,187
- --------------------------------------------------------------------------------
                                                                       1,147,200
- --------------------------------------------------------------------------------
Electronic Safety Devices - 0%
      1,275    Pittway Corp. - Class A                                    63,431
- --------------------------------------------------------------------------------
Finance - Investment Banker/Broker - 0.9%
     38,850    Charles Schwab Corp.                                    1,580,709
- --------------------------------------------------------------------------------
Finance - Other Services - 0.8%
     36,275    Equifax, Inc.                                           1,348,977
- --------------------------------------------------------------------------------
Food - Retail - 0.4%
     13,500    Safeway, Inc.*                                      $     622,687
- --------------------------------------------------------------------------------
Hotels and Motels - 0.2%
     21,775    Extended Stay America, Inc.*                              342,956
- --------------------------------------------------------------------------------
Human Resources - 1.2%
     13,050    Manpower, Inc.                                            580,725
     31,925    Robert Half International, Inc.*                        1,502,470
- --------------------------------------------------------------------------------
                                                                       2,083,195
- --------------------------------------------------------------------------------
Instruments - Controls - 0.5%
     13,975    Parker Hannifin Corp.                                     848,108
- --------------------------------------------------------------------------------
Instruments - Scientific - 2.7%
     81,175    Dionex Corp.*                                           4,160,219
      5,725    Perkin-Elmer Corp.                                        455,495
- --------------------------------------------------------------------------------
                                                                       4,615,714
- --------------------------------------------------------------------------------
Life and Health Insurance - 5.5%
      8,650    AFLAC, Inc.                                               408,712
     43,500    ALLIED Life Financial Corp.                               859,125
      8,100    ARM Financial Group, Inc. - Class A*                      162,000
      5,225    Liberty Corp.                                             212,919
     91,400    Nationwide Financial Services, Inc. - Class A*          2,427,812
      9,900    Protective Life Corp.                                     497,475
     17,325    Reinsurance Group of America                              996,187
     44,875    UICI*                                                   1,323,812
     35,800    UNUM Corp.                                              1,503,600
     29,600    Western National Corp.                                    793,650
- --------------------------------------------------------------------------------
                                                                       9,185,292
- --------------------------------------------------------------------------------
Macinery - Pumps - 0.2%
     13,125    Pfeiffer Vacuum Technology A.G. (ADR)*                    382,266
- --------------------------------------------------------------------------------
Manufacturing - 0.5%
     15,550    Roper Industries, Inc.                                    806,656
- --------------------------------------------------------------------------------
Medical - Drugs - 1.2%
      7,150    Bristol-Myers Squibb Co.                                  579,150
      4,400    SmithKline Beecham PLC (ADR)**                            403,150
      7,600    Teva Pharmaceutical Industries, Ltd. (ADR)                492,100
      4,400    Warner-Lambert Co.                                        546,700
- --------------------------------------------------------------------------------
                                                                       2,021,100
- --------------------------------------------------------------------------------
Medical - HMO - 1.1%
     34,950    United Healthcare Corp.                                 1,817,400
- --------------------------------------------------------------------------------
Medical Labs and Testing Services - 0.2%
     20,950    Covance, Inc.*                                            404,597
- --------------------------------------------------------------------------------
Metal - Aluminum - 0.5%
     11,000    Reynolds Metals Co.                                       783,750
- --------------------------------------------------------------------------------
Money Center Banks - 2.7%
     32,075    Bank of New York Co., Inc.                              1,395,262
      7,400    BankAmerica Corp.                                         477,762
     65,519    Barclays PLC**                                          1,299,796
      3,975    Citicorp                                                  479,236
      7,649    Deutsche Bank A.G.                                        447,299
     37,288    Lloyds TSB Group PLC**                                    382,280
- --------------------------------------------------------------------------------
                                                                       4,481,635
- --------------------------------------------------------------------------------
Mortgage Banks - 0.2%
      5,499    Deutsche Pfandbrief und Hypothekenbank A.G.               316,522
- --------------------------------------------------------------------------------
Multimedia - 0.3%
     15,750    Meredith Corp.                                            456,750
- --------------------------------------------------------------------------------
Music - 0.3%
     23,150    Steinway Musical Instruments, Inc.*                       451,425
- --------------------------------------------------------------------------------
Oil Companies - Exploration and Production - 0.6%
     11,175    Burlington Resources, Inc.                                493,097
     20,650    Union Pacific Resources Group, Inc.                       513,669
- --------------------------------------------------------------------------------
                                                                       1,006,766
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 24
<PAGE>

            Janus Aspen Balanced Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Oil Companies - Integrated - 0.7%
      9,900    Royal Dutch Petroleum Co. - N.Y. Shares             $     538,312
      6,475    Texaco, Inc.                                              704,156
- --------------------------------------------------------------------------------
                                                                       1,242,468
- --------------------------------------------------------------------------------
Oil Field Machinery and Equipment - 1.0%
     19,550    Baker Hughes, Inc.                                        756,341
     13,825    Smith International, Inc.*                                839,869
- --------------------------------------------------------------------------------
                                                                       1,596,210
- --------------------------------------------------------------------------------
Oil Refining and Marketing - 0.5%
    146,949    ENI S.p.A.                                                829,875
- --------------------------------------------------------------------------------
Property and Casualty Insurance - 1.6%
      5,250    Foremost Corp. of America                                 314,344
    129,000    Sumitomo Marine & Fire Insurance Co.                    1,059,687
     60,000    Tokio Marine & Fire Insurance Co.                         786,507
      5,000    Transatlantic Holdings, Inc.                              496,250
      1,950    W. R. Berkley Corp.                                       114,806
- --------------------------------------------------------------------------------
                                                                       2,771,594
- --------------------------------------------------------------------------------
Publishing - Books - 0%
        494    Wolters Kluwer N.V.                                        60,259
- --------------------------------------------------------------------------------
Real Estate Investment Trusts - 1.7%
     18,000    AMLI Residential Properties Trust                         423,000
     45,825    Innkeepers USA Trust                                      687,375
      6,650    Redwood Trust, Inc.                                       310,888
     52,125    Walden Residential Properties, Inc.                     1,335,703
- --------------------------------------------------------------------------------
                                                                       2,756,966
- --------------------------------------------------------------------------------
Retail - Building Products - 0.3%
      8,825    Fastenal Co.                                              432,425
- --------------------------------------------------------------------------------
Retail - Consumer Electronics - 0.5%
     14,725    Tandy Corp.                                               824,600
- --------------------------------------------------------------------------------
Retail - Discount - 0.1%
      7,900    TJX Companies, Inc.                                       208,363
- --------------------------------------------------------------------------------
Retail - Diversified - 0.1%
      3,001    Vendex International N.V.                                 164,651
- --------------------------------------------------------------------------------
Retail - Hypermarkets - 0.4%
     18,975    Costco Companies, Inc.*                                   623,803
- --------------------------------------------------------------------------------
Retail - Major Department Stores - 1.9%
     51,375    Dayton Hudson Corp.                                     2,732,508
      8,250    J.C. Penney Co., Inc.                                     430,547
- --------------------------------------------------------------------------------
                                                                       3,163,055
- --------------------------------------------------------------------------------
Retail - Restaurants - 0.2%
    149,000    Restaurant Brands New Zealand, Ltd.*,+                    258,513
- --------------------------------------------------------------------------------
Savings/Loan/Thrifts - 5.5%
      6,500    Advantage Bancorp, Inc.                                   248,625
     12,950    BostonFed Bancorp, Inc.                                   229,053
      8,975    Calumet Bancorp, Inc.*                                    332,075
     15,000    Cameron Financial Corp.                                   270,000
     16,175    Catskill Financial Corp.                                  250,713
     30,000    Empire Federal Bancorp, Inc.                              431,250
     10,000    FFLC Bancorp, Inc.                                        272,500
     12,000    FFVA Financial Corp.                                      327,000
     22,225    First Bell Bancorp, Inc.                                  372,269
     12,725    First Defiance Financial Corp.                            181,331
     17,250    First Mutual Bancorp, Inc.                                258,750
      6,875    First Savings Bank of Washington Bancorp, Inc.            152,969
     15,675    Flushing Financial Corp.                                  350,728
     12,450    GA Financial, Inc.                                        234,994
     14,000    Gateway Bancorp, Inc.                                     245,000
     11,000    Home Bancorp                                              229,625
     39,925    Home Bancorp of Elgin, Inc.                               658,763
     14,000    Jacksonville Bancorp, Inc.                                210,875
      4,625    JSB Financial, Inc.                                       200,031
     13,375    Klamath First Bancorp, Inc.                               255,797
      6,900    Long Island Bancorp, Inc.                                 250,556
     14,950    Mechanics Savings Bank*                                   282,181
- --------------------------------------------------------------------------------
Savings/Loan/Thrifts - continued
- --------------------------------------------------------------------------------
     21,000    North Central Bancshares, Inc.                      $     325,500
      6,775    Ocean Financial Corp.                                     238,819
      6,500    RCSB Financial, Inc.                                      311,188
     12,300    Reliance Bancorp, Inc.                                    362,081
     32,725    Roslyn Bancorp, Inc.                                      748,584
     12,000    SFS Bancorp, Inc.                                         202,500
     11,050    South Street Financial Corp.                              182,325
     14,700    Standard Financial, Inc.                                  360,150
     15,000    Wells Financial Corp.*                                    225,000
- --------------------------------------------------------------------------------
                                                                       9,201,232
- --------------------------------------------------------------------------------
Special Purpose Banks - 0.2%
      3,603    Dexia France**                                            351,037
- --------------------------------------------------------------------------------
Super-Regional Banks - 0.8%
      4,716    Wells Fargo & Co.                                       1,270,962
- --------------------------------------------------------------------------------
Telecommunication Equipment - 0.4%
     10,450    Lucent Technologies, Inc.                                 753,053
- --------------------------------------------------------------------------------
Telephone - Local - 0.9%
     46,950    Cincinnati Bell, Inc.                                   1,478,925
- --------------------------------------------------------------------------------
Television - 0.4%
     21,850    Young Broadcasting Corp. - Class A*                       710,125
- --------------------------------------------------------------------------------
Tobacco - 1.3%
     49,025    Philip Morris Companies, Inc.                           2,175,484
- --------------------------------------------------------------------------------
Transportation - Truck - 0.4%
     46,100    Consolidated Freightways Corp.*                           754,888
- --------------------------------------------------------------------------------
Travel Services - 0.7%
     25,836    Airtours PLC**                                            498,357
        206    Kuoni Reisen A.G. - Class B                               706,520
- --------------------------------------------------------------------------------
                                                                       1,204,877
- --------------------------------------------------------------------------------
Total Common Stock (total cost $77,703,535)                           88,657,442
- --------------------------------------------------------------------------------
Corporate Bonds - 20.3%
- --------------------------------------------------------------------------------
Aerospace and Defense - 0.7%
 $1,200,000    Lockheed Martin Corp., 6.55% company
                 guaranteed unsecured notes, due 5/15/99               1,204,500
- --------------------------------------------------------------------------------
Commercial Banks - 2.4%
               First Nationwide Holdings, Inc.:
  3,390,000      10.625%, senior subordinated notes,
                   due 10/1/03                                         3,737,475
    250,000      9.125%, senior subordinated notes,
                   due 1/15/03                                           258,750
- --------------------------------------------------------------------------------
                                                                       3,996,225
- --------------------------------------------------------------------------------
Computers - Mainframe - 1.2%
  2,000,000    IBM Corp., 6.375%
                 global notes, due 6/15/00                             1,995,000
- --------------------------------------------------------------------------------
Consulting Services - 0.3%
    500,000    Quintiles Transnational Corp., 4.25%
                 subordinated notes, due 5/31/00+                        535,625
- --------------------------------------------------------------------------------
Containers - Metal and Glass - 0.8%
  1,350,000    Owens-Illinois, Inc., 7.85%
                 senior notes, due 5/15/04                             1,368,563
- --------------------------------------------------------------------------------
Electronic Components - Semiconductors  - 0.6%
  1,011,000    Taiwan Semiconductor, zero coupon
                 bank guaranteed notes, due 7/3/02+                    1,035,011
- --------------------------------------------------------------------------------
Engineering - Research and Development - 1.3%
  2,150,000    Intertek Finance PLC, 10.25%
                 senior subordinated notes, due 11/1/06                2,225,250
- --------------------------------------------------------------------------------
Finance - Consumer Loans - 1.2%
  2,000,000    Associates Corp. N.A., 6.75%
                 senior notes, due 7/15/01                             2,000,000
- --------------------------------------------------------------------------------
Finance  - Investment  Banker/Broker  - 0.1%
    100,000    Merrill Lynch & Co., Inc., 6.375%
                 notes, due 3/30/99                                      100,125
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 25
<PAGE>

            Janus Aspen Balanced Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Finance - Leasing Companies - 1.1%
 $1,800,000    Ryder Trucks, Inc., 10.00%
                 senior subordinated notes, due 12/1/06              $ 1,849,500
- --------------------------------------------------------------------------------
Finance - Other Services - 0.6%
  1,000,000    Sears Roebuck Acceptance Corp., 6.50%
                 notes, due 6/15/00                                      996,250
- --------------------------------------------------------------------------------
Food - Retail - 4.2%
    250,000    Pathmark Stores, Inc., 11.625%
                 subordinated notes, due 6/15/02                         253,125
  5,800,000    Smith's Food & Drug Centers, Inc., 11.25%
                 senior subordinated notes, due 5/15/07                6,800,500
- --------------------------------------------------------------------------------
                                                                       7,053,625
- --------------------------------------------------------------------------------
Medical Labs and Testing Services - 0.6%
    925,000    Dade International, Inc., 11.125%
                 senior subordinated notes, Series B,
                   due 5/1/06                                          1,029,063
- --------------------------------------------------------------------------------
Multimedia - 1.2%
  2,000,000    Walt Disney Co. (The), 6.375%
                 senior notes, due 3/30/01                             1,982,500
- --------------------------------------------------------------------------------
Oil and Gas Drilling - 0.1%
    100,000    Consolidated Natural Gas Co., 5.875%
                 debentures, due 10/1/98                                  99,625
- --------------------------------------------------------------------------------
Paint and Related Products - 0.1%
    190,000    Sherwin-Williams Co., 6.25%
                 notes, due 2/1/00                                       189,050
- --------------------------------------------------------------------------------
Shipbuilding - 0.6%
               Newport News Shipbuilding, Inc.:
    750,000      8.625%, senior notes, due 12/1/06                       770,625
    250,000      9.25%, senior subordinated notes, due 12/1/06           260,000
- --------------------------------------------------------------------------------
                                                                       1,030,625
- --------------------------------------------------------------------------------
Television - 2.0%
  1,250,000    Sinclair Broadcast Group, Inc., 10.00%,
                 senior subordinated notes, due 9/30/05                1,293,750
  2,000,000    Young Broadcasting, Inc., 9.00%
                 company guaranteed notes, due 1/15/06                 1,995,000
- --------------------------------------------------------------------------------
                                                                       3,288,750
- --------------------------------------------------------------------------------
Transportation - Railroad - 1.2%
  2,000,000    Union Pacific Corp., 6.25%
                 notes, due 3/15/99                                    1,992,500
- --------------------------------------------------------------------------------
Total Corporate Bonds (cost $33,330,659)                              33,971,787
- --------------------------------------------------------------------------------
U.S. Government Obligations - 15.4%
               U.S. Treasury Notes:
  1,250,000      6.125%, due 5/15/98                                   1,253,888
  4,030,000      5.50%, due 11/15/98                                   4,004,651
  4,100,000      6.375%, due 5/15/99                                   4,119,926
  6,600,000      6.25%, due 5/31/99                                    6,617,094
  2,900,000      5.875%, due 2/15/00                                   2,875,930
  6,500,000      6.625%, due 4/30/02                                   6,557,720
    500,000      5.875%, due 11/15/05                                    478,155
- --------------------------------------------------------------------------------
Total U.S. Government Obligations (amortized cost $25,875,673)        25,907,364
- --------------------------------------------------------------------------------
Preferred Stock - 5.4%
- --------------------------------------------------------------------------------
Cruise Lines - 0.6%
     15,100    Royal Caribbean Cruises, Ltd., 7.25%                      932,425
- --------------------------------------------------------------------------------
Insurance Brokers - 0.3%
     23,000    Hartford Capital l - Series A, 7.70%,
                 due 2/28/16                                             572,125
- --------------------------------------------------------------------------------
Oil Companies - Integrated - 0.5%
     15,500    Unocal Corp. 6.25%                                        871,875
- --------------------------------------------------------------------------------
Real Estate Investment and Management - 0.3%
     11,484    Insignia Financial Group, Inc. - Class A, 6.50%+          531,135
- --------------------------------------------------------------------------------
Real Estate Investment Trusts - 0.2%
     14,775    Walden Residential Properties, Inc.,
                 Series S, 9.20%                                         373,069
- --------------------------------------------------------------------------------
Retail - Restaurants - 0.9%
     26,625    Wendy's International, Inc., Series A, 5.00%        $   1,560,891
- --------------------------------------------------------------------------------
Telephone - Local - 1.7%
     44,045    Salomon Inc. Exchangeable Notes
                 (Cincinnati Bell, Inc.), 6.25%                        2,807,869
- --------------------------------------------------------------------------------
Toys - 0.1%
     15,550    Mattel, Inc., .4125%                                      219,644
- --------------------------------------------------------------------------------
Transportation - Truck - 0.8%
     23,125    CNF Trust I, Series A, 5.00%                            1,295,000
- --------------------------------------------------------------------------------
Total Preferred Stock (cost $8,627,219)                                9,164,033
- --------------------------------------------------------------------------------
Short-Term Corporate Notes - 1.8%
 $3,000,000    AVCO Financial Service
                 5.58%, 8/26/97 (amortized cost $2,973,960)            2,973,960
- --------------------------------------------------------------------------------
U.S. Government Agency - 5.2%
  8,700,000    Federal Home Loan Mortgage Corp.
                 5.75%, 7/1/97 (amortized cost $8,700,000)             8,700,000
- --------------------------------------------------------------------------------
Warrants - 0%
- --------------------------------------------------------------------------------
Real Estate Investment Trusts - 0%
     14,775    Walden Residential Properties, Inc.
                 (cost $7,388)                                            20,316
- --------------------------------------------------------------------------------
Total Investments (total cost $157,218,434) - 100.9%                 169,394,902
- --------------------------------------------------------------------------------
Liabilities, net of Cash, Receivables and Other Assets - (0.9%)      (1,499,063)
- --------------------------------------------------------------------------------
Net Assets - 100%                                                   $167,895,839
- --------------------------------------------------------------------------------


                       Summary of Investments by Country
                                 June 30, 1997

Country                     % of Investment Securities              Market Value
- --------------------------------------------------------------------------------
Finland                                 0.3%                      $      493,049
France                                  0.6%                           1,006,374
Germany                                 1.1%                           1,884,298
Israel                                  0.3%                             492,100
Japan                                   1.1%                           1,846,194
Netherlands                             1.4%                           2,320,411
New Zealand                             0.1%                             258,513
Switzerland                             0.6%                             950,496
United Kingdom                          2.1%                           3,642,936
United States++                        92.4%                         156,500,531
- --------------------------------------------------------------------------------
Total                                 100.0%                      $  169,394,902
================================================================================
++ Includes Short-Term Securities (85.5% excluding Short-Term Securities)


                           Forward Currency Contracts
                             Open at June 30, 1997

 Currency Sold and                    Currency        Currency       Unrealized
  Settlement Date                    Units Sold    Value in $ U.S.   Gain/(Loss)
- --------------------------------------------------------------------------------
British Pound 7/28/97                   725,000      $1,205,820      ($  33,307)
British Pound 8/20/97                   350,000         581,700         (23,693)
French Franc 10/10/97                 2,100,000         359,842           8,935
- --------------------------------------------------------------------------------
Total                                                $2,147,362      ($  48,065)
================================================================================

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 26
<PAGE>

   Janus Aspen Equity Income Portfolio - Portfolio Manager, Blaine P. Rollins

Performance

Janus Aspen Equity Income  Portfolio  opened on May 1, 1997.  Before  discussing
Portfolio  performance,  I would like to take this  opportunity to thank each of
you for your  investment  with Janus.  The Portfolio  performed  well during its
first two months,  but my  perspective is really  long-term.  I want to purchase
great  individual   businesses,   either  their  stocks  or  their  fixed-income
instruments,   at  reasonable   prices.  I  also  intend  to  carefully  analyze
risk-reward ratios in income producing securities.

Since  inception,  Janus Aspen Equity Income  Portfolio  returned 16.40% for the
period  ended June 30, 1997.  The Standard & Poor's 500 Index gained  10.83% for
the same period.(1) Both returns include reinvested dividends.

A very  dramatic and  broad-based  rally got  underway in April,  after signs of
moderate economic growth began to appear and inflation remained very low. So the
Portfolio opened during a very robust period for the financial markets.

- --------------------------------------------------------------------------------
Portfolio Asset Mix                 June 30, 1997
Equities                                94.6%
Number of Stocks                         118
Top 10 Equities                         28.8%
Preferred Stock                          4.3%
Cash & Cash Equivalents                  1.1%
- --------------------------------------------------------------------------------

Stock Highlights

Companies in the Portfolio tend to share four major characteristics: predictable
earnings,  shareholder-friendly  management,  the ability to generate  excellent
cash flow, and a strong record of increasing  profitability.  I found attractive
individual  opportunities  in financial and  technology  stocks,  and in several
preferred issues.

A number  of our  equity  holdings  produced  good  results  and have  excellent
fundamentals.  Dionex, for example,  dominates the market for ion chromatography
equipment,  which uses color spectrum analysis to identify chemical  components.
The  company  generates  good cash flow and is  repurchasing  its own stock.  At
Unilever,  margins are continuing to improve and the company is spinning off its
chemical unit to focus on consumer products.  New senior management at DuPont is
increasing returns by lowering costs and fixing broken businesses. Management is
allocating  capital to  high-return  operations,  restructuring  divisions,  and
considering acquisitions and divestitures.

Among our  financial  holdings,  small  thrifts  are very  attractive.  Many are
selling  shares  to the  public at very  inexpensive  prices  relative  to their
earnings potential and conservative capitalization.  For example, Roslyn Bancorp
has an equity to asset  ratio of nearly  30%.  (In other  words,  roughly 30% of
Roslyn's  assets are equity.) A typical ratio is around 7%.  Roslyn,  as well as
many other of these  small  banks and  thrifts,  is  distributing  extra cash to
shareholders  as special  dividends or in the form of share  buybacks.  There is
also a powerful wave of consolidation underway in the industry.

On the income side,  Royal Dutch  Petroleum and Unocal offer good dividends plus
the  potential  for capital  appreciation.  The  companies  are  focusing on the
higher-margin exploration and production side of the oil business rather than on
lower-margin refining and marketing operations.

Parametric   Technology,   the  world's   largest   developer  and  marketer  of
computer-aided  design and manufacturing  software,  was down moderately for the
period.   Investors  were  concerned   about   increasing   competition  in  the
fast-growing Japanese market. I believe these concerns are overdone and continue
to hold the stock.

Current Outlook

Economic  growth now appears to be stable after a very strong first quarter.  As
long as  inflation  remains  low and  corporate  profits  continue to be robust,
stocks and fixed-income  securities  should make progress.  In the long run, the
more  predictable  earnings  of our  high-quality  businesses  should  allow the
Portfolio to  participate  in good markets  while  softening  the effects of any
negative market surprises.

Once  again,  thank  you for  your  investment  in  Janus  Aspen  Equity  Income
Portfolio.

- --------------------------------------------------------------------------------
(1)  Index and Portfolio returns include reinvested  dividends.  The Portfolio's
     securities may differ significantly from the securities in the index. Index
     returns  do not  include  taxes on  dividends  and  interest  payments,  or
     operating expenses necessary to maintain a portfolio consisting of the same
     securities that are in the index.  The Portfolio's  return does not reflect
     the  charges  and  expenses  of  any  particular  insurance  product.  Past
     performance is no guarantee of future results.

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 27
<PAGE>

         Janus Aspen Equity Income Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Common Stock - 94.6%
- --------------------------------------------------------------------------------
Aerospace and Defense - 0.4%
         75    DONCASTERS PLC*                                     $       1,734
- --------------------------------------------------------------------------------
Airlines - 1.7%
        275    Ryanair Holdings PLC (ADR)*                                 7,459
- --------------------------------------------------------------------------------
Apparel Manufacturers - 0.3%
         25    St. John Knits, Inc.                                        1,350
- --------------------------------------------------------------------------------
Cable Television - 0.6%
        175    Tele-Communications, Inc. - Class A*                        2,603
- --------------------------------------------------------------------------------
Chemicals - Diversified - 1.5%
         75    Airgas, Inc.*                                               1,486
         29    BASF A.G.                                                   1,073
         72    BOC Group PLC                                               1,252
         40    E.I. du Pont de Nemours and Co.                             2,515
- --------------------------------------------------------------------------------
                                                                           6,326
- --------------------------------------------------------------------------------
Commercial Banks - 0.8%
         50    First Savings Bancorp, Inc.                                 1,113
         25    Star Banc Corp.                                             1,056
         75    Sterling Bancorp                                            1,397
- --------------------------------------------------------------------------------
                                                                           3,566
- --------------------------------------------------------------------------------
Commercial Services - 0.5%
         25    First USA Paymentech, Inc.*                                   723
         20    Quintiles Transnational Corp.*                              1,393
- --------------------------------------------------------------------------------
                                                                           2,116
- --------------------------------------------------------------------------------
Computer Software - 6.3%
        141    BETA Systems Software A.G.*                                16,669
        250    Parametric Technology Corp.*                               10,641
- --------------------------------------------------------------------------------
                                                                          27,310
- --------------------------------------------------------------------------------
Computers - Information Technology - 3.2%
        800    RWD Technologies, Inc.*                                    13,800
- --------------------------------------------------------------------------------
Computers - Integrated Systems - 0.6%
        125    Wang Laboratories, Inc.*                                    2,664
- --------------------------------------------------------------------------------
Consumer Products - 0.7%
        125    Gibson Greetings, Inc.*                                     2,813
- --------------------------------------------------------------------------------
Cruise Lines - 3.6%
        140    Carnival Corp. - Class A                                    5,775
        275    Royal Caribbean Cruises, Ltd.                               9,608
- --------------------------------------------------------------------------------
                                                                          15,383
- --------------------------------------------------------------------------------
Diversified Operations - 4.9%
        202    Asko OY - Class A                                           3,726
         45    Minnesota Mining and Manufacturing Co.                      4,590
         46    Rentokil Initial PLC                                          162
        237    Siebe PLC                                                   4,011
         30    Unilever N.V. - N.Y. Shares                                 6,540
        100    Westinghouse Electric Corp.                                 2,313
- --------------------------------------------------------------------------------
                                                                          21,342
- --------------------------------------------------------------------------------
Electronic Components - 2.1%
         54    Philips Electronics N.V.                                    3,875
         60    Texas Instruments, Inc.                                     5,044
- --------------------------------------------------------------------------------
                                                                           8,919
- --------------------------------------------------------------------------------
Electronic Safety Devices - 1.0%
         90    Pittway Corp. - Class A                                     4,478
- --------------------------------------------------------------------------------
Finance - Investment Banker/Broker - 0.2%
         25    Charles Schwab Corp.                                        1,017
- --------------------------------------------------------------------------------
Finance - Other Services - 0.9%
        100    Equifax, Inc.                                               3,719
- --------------------------------------------------------------------------------
Food - Retail - 1.1%
        100    Safeway, Inc.*                                              4,613
- --------------------------------------------------------------------------------
Hotels and Motels - 0.3%
         75    Extended Stay America, Inc.*                                1,181
- --------------------------------------------------------------------------------
Human Resources - 1.1%
         25    Manpower, Inc.                                      $       1,113
         75    Robert Half International, Inc.*                            3,530
- --------------------------------------------------------------------------------
                                                                           4,643
- --------------------------------------------------------------------------------
Instruments - Controls - 2.1%
        150    Parker Hannifin Corp.                                       9,103
- --------------------------------------------------------------------------------
Instruments - Scientific - 1.8%
        150    Dionex Corp.*                                               7,688
- --------------------------------------------------------------------------------
Lasers - Systems and Components - 0.3%
         75    Rofin-Sinar Technologies, Inc.*                             1,434
- --------------------------------------------------------------------------------
Life and Health Insurance - 10.3%
         25    AFLAC, Inc.                                                 1,181
         75    ALLIED Life Financial Corp.                                 1,481
      1,000    ARM Financial Group, Inc. - Class A*                       20,000
         25    Equitable of Iowa Companies                                 1,400
        200    Hartford Life, Inc. - Class A*                              7,500
         50    Nationwide Financial Services, Inc. - Class A*              1,328
         25    Reinsurance Group of America                                1,438
         80    UICI*                                                       2,360
         30    UNUM Corp.                                                  1,260
        250    Western National Corp.                                      6,703
- --------------------------------------------------------------------------------
                                                                          44,651
- --------------------------------------------------------------------------------
Machinery - Pumps - 0.3%
         50    Pfeiffer Vacuum Technology A.G. (ADR)*                      1,456
- --------------------------------------------------------------------------------
Manufacturing - 0.6%
         50    Roper Industries, Inc.                                      2,594
- --------------------------------------------------------------------------------
Medical - Drugs - 1.5%
         25    Bristol-Myers Squibb Co.                                    2,025
         21    Teva Pharmaceutical Industries, Ltd. (ADR)                  1,360
         25    Warner-Lambert Co.                                          3,106
- --------------------------------------------------------------------------------
                                                                           6,491
- --------------------------------------------------------------------------------
Medical - HMO - 0.8%
         70    United Healthcare Corp.                                     3,640
- --------------------------------------------------------------------------------
Medical Instruments - 0.2%
         15    Sofamor Danek Group, Inc.*                                    686
- --------------------------------------------------------------------------------
Medical Labs and Testing Services - 0.7%
        160    Covance, Inc.*                                              3,090
- --------------------------------------------------------------------------------
Metal - Aluminum - 1.4%
         85    Reynolds Metals Co.                                         6,056
- --------------------------------------------------------------------------------
Money Center Banks - 1.4%
         25    Bank of New York Co., Inc.                                  1,087
         20    BankAmerica Corp.                                           1,291
         10    Citicorp                                                    1,206
         21    Deutsche Bank A.G.                                          1,228
        120    Lloyds TSB Group PLC                                        1,230
- --------------------------------------------------------------------------------
                                                                           6,042
- --------------------------------------------------------------------------------
Multilevel Direct Selling - 0.3%
         25    Amway Asia Pacific, Ltd.                                    1,091
- --------------------------------------------------------------------------------
Multimedia - 0.3%
         50    Meredith Corp.                                              1,450
- --------------------------------------------------------------------------------
Music - 1.3%
        300    Steinway Musical Instruments, Inc.*                         5,850
- --------------------------------------------------------------------------------
Office Furnishings - 0.7%
        125    Knoll, Inc.*                                                2,969
- --------------------------------------------------------------------------------
Oil - Field Services - 0.7%
        150    Hanover Compressor Co.*                                     2,925
- --------------------------------------------------------------------------------
Oil and Gas Drilling - 2.6%
        325    Santa Fe International Corp.*                              11,050
- --------------------------------------------------------------------------------
Oil Companies - Exploration and Production - 0.4%
         75    Union Pacific Resources Group, Inc.                         1,866
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 28
<PAGE>

         Janus Aspen Equity Income Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Oil Companies - Integrated - 2.0%
         80    Royal Dutch Petroleum Co. - N.Y. Shares             $       4,350
         30    Texaco, Inc.                                                3,262
         25    Unocal Corp.                                                  970
- --------------------------------------------------------------------------------
                                                                           8,582
- --------------------------------------------------------------------------------
Oil Field Machinery and Equipment - 1.8%
         25    Baker Hughes, Inc.                                            967
        110    Smith International, Inc.*                                  6,682
- --------------------------------------------------------------------------------
                                                                           7,649
- --------------------------------------------------------------------------------
Oil Refining and Marketing - 1.0%
        728    ENI S.p.A.                                                  4,122
- --------------------------------------------------------------------------------
Property and Casualty Insurance - 2.7%
      1,000    Sumitomo Marine & Fire Insurance Co.                        8,215
         35    Transatlantic Holdings, Inc.                                3,474
- --------------------------------------------------------------------------------
                                                                          11,689
- --------------------------------------------------------------------------------
Publishing - Books - 1.0%
        125    Scholastic Corp.*                                           4,375
- --------------------------------------------------------------------------------
Real Estate Investment Trusts - 1.6%
        300    Innkeepers USA Trust                                        4,500
        100    Walden Residential Properties, Inc.                         2,562
- --------------------------------------------------------------------------------
                                                                           7,062
- --------------------------------------------------------------------------------
Retail - Building Products - 0.3%
         25    Fastenal Co.                                                1,225
- --------------------------------------------------------------------------------
Retail - Consumer Electronics - 1.6%
        125    Tandy Corp.                                                 7,000
- --------------------------------------------------------------------------------
Retail - Discount - 1.4%
        100    Family Dollar Stores, Inc.                                  2,725
         25    TJX Companies, Inc.                                           659
         80    Wal-Mart Stores, Inc.                                       2,705
- --------------------------------------------------------------------------------
                                                                           6,089
- --------------------------------------------------------------------------------
Retail - Diversified - 0.2%
         18    Vendex International N.V.                                     988
- --------------------------------------------------------------------------------
Retail - Hypermarkets - 1.3%
        165    Costco Companies, Inc.*                                     5,424
- --------------------------------------------------------------------------------
Retail Jewelry - 0.4%
        100    TAG Heuer International S.A. (ADR)*                         1,506
- --------------------------------------------------------------------------------
Retail - Major Department Stores - 3.8%
        285    Dayton Hudson Corp.                                        15,158
         25    J.C. Penney Co., Inc.                                       1,305
- --------------------------------------------------------------------------------
                                                                          16,463
- --------------------------------------------------------------------------------
Retail - Regional Department Stores - 2.1%
        175    Fred Meyer, Inc.*                                           9,045
- --------------------------------------------------------------------------------
Retail - Restaurants - 0.6%
        100    Wendy's International, Inc.                                 2,594
- --------------------------------------------------------------------------------
Savings/Loan/Thrifts - 6.3%
        100    Advantage Bancorp, Inc.                                     3,825
         25    Calumet Bancorp, Inc.*                                        925
        125    FSF Financial Corp.                                         2,172
        275    Home Bancorp of Elgin, Inc.                                 4,537
         50    JSB Financial, Inc.                                         2,162
        250    Little Falls Bancorp, Inc.                                  3,906
         75    Mechanics Savings Bank*                                     1,416
         75    North Central Bancshares, Inc.                              1,162
         25    Norwich Financial Corp.                                       541
         35    Ocean Financial Corp.                                       1,234
        225    Roslyn Bancorp, Inc.                                        5,147
- --------------------------------------------------------------------------------
                                                                          27,027
- --------------------------------------------------------------------------------
Special Purpose Banks - 0.3%
         12    Dexia France                                                1,169
- --------------------------------------------------------------------------------
Super-Regional Banks - 0.3%
          5    Wells Fargo & Co. $                                         1,347
- --------------------------------------------------------------------------------
Telecommunication Equipment - 0.8%
         50    Lucent Technologies, Inc.                                   3,603
- --------------------------------------------------------------------------------
Telephone - Local - 1.5%
        200    Cincinnati Bell, Inc.                                       6,300
- --------------------------------------------------------------------------------
Television - 0.6%
         25    Univision Communications, Inc.*                               978
         50    Young Broadcasting Corp. - Class A*                         1,625
- --------------------------------------------------------------------------------
                                                                           2,603
- --------------------------------------------------------------------------------
Tobacco - 1.2%
        120    Philip Morris Companies, Inc.                               5,325
- --------------------------------------------------------------------------------
Transportation - Truck - 1.1%
        100    CNF Transportation, Inc.                                    3,225
        100    Consolidated Freightways Corp.*                             1,637
- --------------------------------------------------------------------------------
                                                                           4,862
- --------------------------------------------------------------------------------
Travel Services - 1.2%
        100    Airtours PLC                                                1,929
          1    Kuoni Reisen A.G. - Class B                                 3,430
- --------------------------------------------------------------------------------
                                                                           5,359
- --------------------------------------------------------------------------------
Total Common Stock (cost $369,190)                                       408,576
- --------------------------------------------------------------------------------
Preferred Stock - 4.3%
- --------------------------------------------------------------------------------
Cruise Lines - 2.2%
        150    Royal Caribbean Cruises, Ltd., 7.25%                        9,263
- --------------------------------------------------------------------------------
Retail - Restaurants - 0.3%
         25    Wendy's International, Inc. - Series A, 5.00%               1,466
- --------------------------------------------------------------------------------
Telephone - Local - 1.1%
         75    Salomon, Inc. Exchangeable Notes,
                 (Cincinnati Bell, Inc.), 6.25%                            4,781
- --------------------------------------------------------------------------------
Toys - 0.7%
        225    Mattel, Inc., .4125%                                        3,178
- --------------------------------------------------------------------------------
Total Preferred Stock (cost $18,093)                                      18,688
- --------------------------------------------------------------------------------
U.S. Government Agency - 8.1%
    $35,000    Federal Home Loan Mortgage Corp.
                 5.75%, 7/1/97 (amortized cost $35,000)                   35,000
- --------------------------------------------------------------------------------
Total Investments (total cost $422,283) - 107.0%                         462,264
- --------------------------------------------------------------------------------
Liabilities, net of Cash, Receivables and Other Assets - (7.0%)         (30,319)
- --------------------------------------------------------------------------------
Net Assets - 100%                                                       $431,945
- --------------------------------------------------------------------------------


                       Summary of Investments by Country
                                 June 30, 1997

Country                     % of Investment Securities              Market Value
- --------------------------------------------------------------------------------
Finland                                 0.8%                            $  3,725
France                                  0.3%                               1,169
Germany                                 4.4%                              20,426
Hong Kong                               0.2%                               1,091
Ireland                                 1.6%                               7,459
Israel                                  0.3%                               1,360
Italy                                   0.9%                               4,122
Japan                                   1.8%                               8,214
Netherlands                             3.4%                              15,753
Switzerland                             1.1%                               4,936
United Kingdom                          2.2%                              10,318
United States++                        83.0%                             383,691
- --------------------------------------------------------------------------------
Total                                 100.0%                            $462,264
================================================================================
++ Includes Short-Term Securities (75.4% excluding Short-Term Securities)

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 29
<PAGE>

                     Janus Aspen Flexible Income Portfolio
          Portfolio Managers, Sandy R. Rufenacht and Ronald V. Speaker

Performance Review

During  the first half of the year ended June 30,  1997,  Janus  Aspen  Flexible
Income  Portfolio  outperformed  the Lehman Brothers  Government/Corporate  Bond
Index,  gaining  4.35%,  versus a gain of 2.74% for the  Lehman  Index.(1)  Both
returns included reinvested dividends.

Diversity  remains Janus Aspen Flexible Income  Portfolio's  greatest asset, and
was the major reason we  outperformed  the Index.  The  Portfolio  invested in a
range of  fixed-income  securities,  including  investment-grade  corporate  and
high-yield/high-risk (junk) bonds.

The bond market  continued  to trade within a clearly  defined  range during the
last six months. The yield on the benchmark 30-year Treasury bond stayed between
7.25% and 6.50%. In the second quarter, the economy began to slow from its rapid
growth of the previous three months. The prospect of continued moderate economic
growth,  combined with low inflation,  sparked a rally in the financial markets.
Bonds and stocks rose sharply,  and bond yields finished the period near the low
end of the trading range. High-yield bonds were again one of the best-performing
market sectors, helped along by stable interest rates and the very powerful rise
in equities.

The Portfolio

As rates  fluctuated  we  adjusted  the  Portfolio's  holdings.  We became  more
defensive when rates rose,  and when they declined we increased the  Portfolio's
weighted  average  maturity and lowered its cash  position to take  advantage of
rising prices.  In the high-yield area, the exposure to "cushion bonds" remained
significant.  Cushion bonds are high-yield  bonds that are likely to be redeemed
before  they  mature.  They  carry  generous  yields but tend to have less price
volatility.

- --------------------------------------------------------------------------------
Portfolio Asset Mix                        June 30, 1997       December 31, 1996
Investment-Grade Corporate Bonds                26.4%                 49.5%
High-Yield/High-Risk Bonds                      43.5%                 27.0%
U.S. Government Bonds                           16.6%                 11.9%
Preferred Stock                                  2.3%                  1.3%
Cash & Cash Equivalents                         11.2%                 10.3%
- --------------------------------------------------------------------------------
Portfolio Profile
Weighted Avg. Maturity                         8.2 Yrs.              8.4 Yrs
Average Modified Duration*                     5.4 Yrs.              5.5 Yrs
30-Day Avg. Yield
  Institutional Shares                          7.16%                 7.39%
  Retirement Shares                             6.65%                  N/A
Avg. Rating                                      BBB+                  BBB
- --------------------------------------------------------------------------------
* A theoretical measure of price volatility.

Our  investment-grade  corporate bonds include familiar names such as Coca Cola,
Ford, and Walt Disney.

Among our high-yield holdings, Allbritton is an example of what we look for in a
cushion  bond.  Allbritton  owns six  television  stations  on the  east  coast.
According to our analysis,  the company's  ABC  affiliate in  Washington,  D.C.,
provides  reasonable  collateral by itself for the debt  offering we own,  which
carries an 11.5%  coupon and is callable in August.  Albritton  recently  issued
9.75% bonds, so we believe our bonds could be redeemed early.

Ryder Truck  Rental and Dade  International  are other  high-yield  issuers with
exciting potential. Ryder is well-managed,  has great brand recognition,  and is
restructuring  its financial  operation to increase cash and pay down debt. Dade
International  makes  diagnostic  equipment  used by hospitals to test blood and
tissue. Dade recently purchased the diagnostic  equipment division of Hoechst, a
large German conglomerate.

Another notable  development among our high-yield  companies was the acquisition
of  Smith's  Food and  Drug  Centers  by Fred  Meyer.  There  is a trend  toward
consolidation in the supermarket  industry as regional  operators like Smith are
being acquired by larger chains.

The Treasury and corporate  sectors of the Portfolio  were little changed during
the first  half.  Treasuries  were kept at  ten-year  maturities  to  preserve a
competitive yield and avoid the volatility of longer bonds.

Looking Ahead

We are comfortable with the bond market in its current trading range,  where the
Portfolio's  flexibility  has proven  effective  in dealing with  interest  rate
changes.  We intend to continue  using the  volatility in interest rates to take
advantage of specific  opportunities.  We also will spend a good deal of time on
the road in the second  half of the year,  trying to add value to our  corporate
holdings,  especially  our high-yield  positions,  through  firsthand,  detailed
research.  U.S.  business  is now  highly  flexible,  which  enables it to adapt
quickly to changes in interest rates and also helps keep the U.S.  economy on an
even keel. As long as this equilibrium is in place, the climate for bonds should
remain positive.

Thank  you  for  your  continued  investment  in  Janus  Aspen  Flexible  Income
Portfolio.

- --------------------------------------------------------------------------------
(1)  Index and Portfolio returns include reinvested  dividends.  The Portfolio's
     securities may differ significantly from the securities in the index. Index
     returns  do not  include  taxes on  dividends  and  interest  payments,  or
     operating expenses necessary to maintain a portfolio consisting of the same
     securities that are in the index.  The Portfolio's  return does not reflect
     the  charges  and  expenses  of  any  particular  insurance  product.  Past
     performance is no guarantee of future results.

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 30
<PAGE>

        Janus Aspen Flexible Income Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Corporate Bonds - 69.9%
- --------------------------------------------------------------------------------
Airlines - 0.4%
        $150,000  ValuJet, Inc., 10.25%
                    senior notes, due 4/15/01                         $  142,125
- --------------------------------------------------------------------------------
Automotive - Cars and Light Trucks - 4.5%
         850,000  Ford Motor Co., 7.25%
                    notes, due 10/1/08                                   856,375
         750,000  General Motors Corp., 7.10%
                    notes, due 3/15/06                                   753,750
- --------------------------------------------------------------------------------
                                                                       1,610,125
- --------------------------------------------------------------------------------
Beverages - Non-Alcoholic - 1.4%
         500,000  Dr. Pepper Bottling Holdings, zero coupon
                    senior notes, due 2/15/03                            496,250
- --------------------------------------------------------------------------------
Broadcast Services and Programming - 0.8%
         250,000  Grupo Televisa S.A., 11.875%
                    senior notes, due 5/15/06                            281,563
- --------------------------------------------------------------------------------
Building and Construction Products - 1.2%
                  USG Corp.:
         200,000    8.50% senior notes, due 8/1/05                       210,000
         205,000    9.25% senior notes, due 9/15/01                      215,763
- --------------------------------------------------------------------------------
                                                                         425,763
- --------------------------------------------------------------------------------
Chemicals - Fibers - 0.9%
         300,000  Polysindo International Finance Co. B.V., 11.375%
                    company guaranteed notes, due 6/15/06                329,250
- --------------------------------------------------------------------------------
Chemicals - Specialty - 1.4%
         500,000  Praxair, Inc., 6.90%
                    notes, due 11/1/06                                   495,000
- --------------------------------------------------------------------------------
Commercial Banks - 5.6%
         500,000  First National Bank of Omaha, 7.32%
                    subordinated notes, due 12/1/10                      483,125
         735,000  First Nationwide Holdings, Inc., 10.625%
                    senior subordinated notes, due 10/1/03               810,338
         700,000  HUBCO, Inc., 8.20%
                    subordinated debentures, due 9/15/06                 728,000
- --------------------------------------------------------------------------------
                                                                       2,021,463
- --------------------------------------------------------------------------------
Commercial Services - 1.3%
         445,000  NeoData Services, Inc., 12.00%
                    senior notes, due 5/1/03                             475,594
- --------------------------------------------------------------------------------
Computers - Mainframe - 1.4%
         500,000  IBM Corp., 7.50%
                    global notes, due 6/15/13                            511,250
- --------------------------------------------------------------------------------
Containers - Metal and Glass - 1.0%
         350,000  Owens-Illinois, Inc., 7.85%
                    senior notes, due 5/15/04                            354,813
- --------------------------------------------------------------------------------
Electric - Integrated - 1.8%
         600,000  El Paso Electric Co., 9.40%
                    first mortgage bonds, due 5/1/11                     642,750
- --------------------------------------------------------------------------------
Engineering - Research and Development - 1.5%
         500,000  Intertek Finance PLC, 10.25%
                    senior subordinated notes, due 11/1/06               517,500
- --------------------------------------------------------------------------------
Engines - Internal Combustion - 2.3%
         800,000  AGCO Corp., 8.50%
                    senior subordinated notes, due 3/15/06               821,000
- --------------------------------------------------------------------------------
Finance - Auto Loans - 1.3%
         500,000  General Motors Acceptance Corp., 6.625%
                    notes, due 10/15/05                                  481,875
- --------------------------------------------------------------------------------
Finance - Leasing Companies - 0.7%
         225,000  Ryder Trucks, Inc., 10.00%
                    senior subordinated notes, due 12/1/06               231,188
- --------------------------------------------------------------------------------
Food - Diversified - 2.1%
        $750,000  Ralston-Ralston Purina Group, 7.875%
                    debentures, due 6/15/25                           $  765,937
- --------------------------------------------------------------------------------
Food - Retail - 2.7%
         500,000  Pathmark Stores, Inc., 11.625%
                    subordinated notes, due 6/15/02                      506,250
         250,000  Smith's Food & Drug Centers, Inc., 11.25%
                    senior subordinated notes, due 5/15/07               293,125
         150,000  Star Markets Co., Inc., 13.00%
                    senior subordinated notes, due 11/1/04               170,062
- --------------------------------------------------------------------------------
                                                                         969,437
- --------------------------------------------------------------------------------
Funeral Services and Related Items - 0.7%
         250,000  Service Corporation International, 7.70%
                     notes, due 4/15/09                                  256,875
- --------------------------------------------------------------------------------
Home Furnishings - 2.6%
         450,000  Cort Furniture Rental, 12.00%
                    senior notes, due 9/1/00                             501,750
         390,000  Lifestyle Furnishings International, Inc., 10.875%
                    company guaranteed notes, due 8/1/06                 426,562
- --------------------------------------------------------------------------------
                                                                         928,312
- --------------------------------------------------------------------------------
Industrial Audio and Video Products - 0.3%
         100,000  Unifrax Investment Corp., 10.50%
                    senior notes, due 11/1/03                            103,625
- --------------------------------------------------------------------------------
Life and Health Insurance - 2.4%
         742,000  Delphi Financial Group, Inc., 8.00%
                    senior notes, due 10/1/03                            747,565
         120,000  Penncorp Financial Group, Inc., 9.25%
                    senior subordinated notes, due 12/15/03              126,900
- --------------------------------------------------------------------------------
                                                                         874,465
- --------------------------------------------------------------------------------
Medical - Hospitals - 3.7%
                  Tenet Healthcare Corp.:
         750,000    10.125% senior subordinated
                     notes, due 3/1/05                                   819,375
         200,000    8.625% senior notes, due 12/1/03                     207,750
         300,000    8.625% senior subordinated
                     notes, due 1/15/07                                  307,500
- --------------------------------------------------------------------------------
                                                                       1,334,625
- --------------------------------------------------------------------------------
Medical Products - 2.2%
         530,000  DGS International Finance Co., 10.00%
                    company guaranteed notes, due 6/1/07+                548,550
         250,000  IMED Corp., 9.75%
                    senior subordinated notes, due 12/1/06+              253,750
- --------------------------------------------------------------------------------
                                                                         802,300
- --------------------------------------------------------------------------------
Money Center Banks - 4.1%
         500,000  BankAmerica Corp., 7.125%
                    subordinated notes, due 5/1/06                       497,500
         500,000  Chase Manhattan Corp., 6.75%
                    subordinated notes, due 8/15/08                      481,875
         500,000  First National Bank of Boston, 7.375%
                    subordinated notes, due 9/15/06                      505,000
- --------------------------------------------------------------------------------
                                                                       1,484,375
- --------------------------------------------------------------------------------
Multimedia - 2.1%
         250,000  News America Holdings, Inc., 7.70%
                    unsecured senior debentures, due 10/30/25            235,937
         500,000  Time Warner, Inc., 8.18%
                    notes, due 8/15/07                                   521,875
- --------------------------------------------------------------------------------
                                                                         757,812
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 31
<PAGE>

        Janus Aspen Flexible Income Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Oil Companies - Exploration and Production - 1.4%
      $  250,000  Gulf Canada Resources, Ltd., 9.25%
                    senior subordinated debentures, due 1/15/04      $   262,500
         300,000  Mesa Operating Co., zero coupon
                    company guaranteed notes, due 7/1/06                 231,750
- --------------------------------------------------------------------------------
                                                                         494,250
- --------------------------------------------------------------------------------
Paint and Related Products - 1.4%
         500,000  Sherwin-Williams Co., 6.85%
                    notes, due 2/1/07                                    494,375
- --------------------------------------------------------------------------------
Property and Casualty Insurance - 1.0%
         350,000  Orion Capital Corp., 7.25%
                    senior notes, due 7/15/05                            349,125
- --------------------------------------------------------------------------------
Recreational Centers - 2.1%
         750,000  Six Flags Theme Parks, zero coupon
                    senior subordinated notes, due 6/15/05               764,062
- --------------------------------------------------------------------------------
Retail - Auto Parts - 0.7%
         240,000  Federal-Mogul Co., 8.80%
                    senior notes, due 4/15/07+                           249,600
- --------------------------------------------------------------------------------
Retail - Leisure Products - 0.5%
         150,000  Selmer Co., Inc., 11.00%
                    subordinated notes, due 5/15/05                      163,875
- --------------------------------------------------------------------------------
Savings/Loan/Thrifts - 3.3%
         900,000  Anchor Bancorp, Inc., 8.9375%
                    senior notes, due 7/9/03                             931,500
         250,000  Standard Federal Bancorp, 7.75%
                    subordinated notes, due 7/17/06                      259,375
- --------------------------------------------------------------------------------
                                                                       1,190,875
- --------------------------------------------------------------------------------
Steel - Producers - 1.5%
         500,000  Weirton Steel Corp., 11.375%
                    senior notes, due 7/1/04                             533,750
- --------------------------------------------------------------------------------
Telecommunication Services - 1.7%
         600,000  Talton Holdings, Inc., 11.00%
                    company guaranteed notes, due 6/30/07+               606,000
- --------------------------------------------------------------------------------
Telephone - Long Distance - 1.4%
         500,000  Worldcom, Inc., 7.75%
                    notes, due 4/1/07                                    513,125
- --------------------------------------------------------------------------------
Television - 1.9%
         50,000   Allbritton Communications, 11.50%
                    senior subordinated debentures, due 8/15/04           52,562
         150,000  Pegasus Media & Communications, Inc., 12.50%
                    notes, due 7/1/05                                    165,000
         450,000  Sinclair Broadcast Group, Inc., 10.00%
                    senior subordinated notes, due 9/30/05               465,750
- --------------------------------------------------------------------------------
                                                                         683,312
- --------------------------------------------------------------------------------
Theaters - 0.7%
         245,787  United Artists Theatres Circuit, Inc., 9.30%
                    pass thru certificates, due 7/1/15                   235,648
- --------------------------------------------------------------------------------
Tobacco - 1.2%
         400,000  Consolidated Cigar Acquisition Corp., 10.50%
                    senior subordinated notes, due 3/1/03                420,000
- --------------------------------------------------------------------------------
Transportation - Services - 0.7%
         250,000  CSX Corp., 7.25%
                    debentures, due 5/1/04+                              252,500
- --------------------------------------------------------------------------------
Total Corporate Bonds (cost $24,294,487)                              25,065,769
- --------------------------------------------------------------------------------
U.S. Government Obligation - 16.6%
       6,000,000  U.S. Treasury Notes, 6.50%
                    due 10/15/06 (cost $5,928,845)                     5,970,600
- --------------------------------------------------------------------------------
Preferred Stock - 2.3%
- --------------------------------------------------------------------------------
Savings/Loan/Thrifts - 2.3%
         20,000   California Federal Preferred Capital Corp., 9.125% $   517,500
         10,000   Chevy Chase Savings, 13.00%, Non-Cumulative            300,000
- --------------------------------------------------------------------------------
Total Preferred Stock (cost $813,375)                                    817,500
- --------------------------------------------------------------------------------
U.S. Government Agency - 8.9%
     $3,200,000   Federal Home Loan Mortgage Corp.,
                    5.75%, 7/1/97 (amortized cost $3,200,000)          3,200,000
- --------------------------------------------------------------------------------
Total Investments (total cost $34,236,707) - 97.7%                    35,053,869
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 2.3%            811,822
- --------------------------------------------------------------------------------
Net Assets - 100%                                                    $35,865,691
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 32
<PAGE>

                        Janus Aspen High-Yield Portfolio
          Portfolio Managers, Sandy R. Rufenacht and Ronald V. Speaker

Performance Review

During the first half of the year ended June 30,  1997,  Janus Aspen  High-Yield
Portfolio produced a total return of 7.20%,  compared to a total return of 5.82%
for the Lehman  Brothers  High-Yield  Index.  Both  returns  include  reinvested
dividends.(1)

The Portfolio outperformed its benchmark index due to careful bond selection and
detailed  research.  As we have said before,  in the high-yield market intensive
equity-style  research not only provides a better  understanding  of a company's
balance sheet,  but can also uncover  earnings  potential and other factors that
make a bond attractive.  We continued to focus on companies that were candidates
for rating  upgrades,  sometimes to investment  grade, and we also held "cushion
bonds."  Cushion bonds are  high-yield  bonds that have a better chance of being
redeemed  before they mature.  They have generous  yields but tend to have lower
price fluctuations when interest rates change. This strategy proved effective in
March and April, when high-yield bonds came under pressure.

The bond market  continued  to trade within a clearly  defined  range during the
last six months. The yield on the benchmark 30-year Treasury bond stayed between
7.25% and 6.50%. In the second  quarter,  the economy began to slow from its the
rapid growth of the previous  three months.  The prospect of continued  moderate
economic  growth,  combined  with low  inflation,  sparked  another rally in the
financial markets.  Bonds and stocks rose sharply,  and bond yields finished the
period near the low end of their trading range.  High-yield bonds were again one
of the best-performing market sectors, helped along by stable interest rates and
the very powerful rise in equities.

Portfolio Strategy

High-yield  securities are something of a hybrid sector.  Performance is often a
mix of both the stock and bond markets,  since the same economic conditions that
are conducive to a strong equity market - a favorable business climate, abundant
capital,  and low interest rates - are also beneficial to high-yield issuers. In
fact, the performance of high-yield bonds is probably more closely linked to the
performance of stocks than to Treasury yields, so when stocks surged, high-yield
debt rallied as well.

The  high-yield  sector has also  benefited  from very strong  demand for better
yields.  Money has been flooding into high-yield  bonds for over a year now, and
certain  industries  have become  overheated.  Our strategy was to focus more on
supermarkets  and  other,  less  glamorous,  industries.  However,  buy and sell
decisions were based on the potential of individual  companies.  As always,  our
basic  investment  discipline  is to add value to the  Portfolio  via  detailed,
fundamental research of individual ideas.

- --------------------------------------------------------------------------------
Portfolio Profile                 June 30, 1997      December 31, 1996
Weighted Avg. Maturity                8.2 Yrs.             8.0 Yrs.
Avg. Modified Duration*               6.3 Yrs.             5.1 Yrs.
Avg. 30-Day Yield                                          
  Institutional Shares                 8.53%                8.93%
  Retirement Shares                    8.05%                 N/A
Avg. Rating                              BB                   B
- --------------------------------------------------------------------------------
* A theoretical measure of price volatility.

Two exciting individual bonds are Albritton Communications and Cobblestone Golf.
Albritton is a cushion  bond.  It carries an 11.5% coupon and can be redeemed as
early as August.  The company  recently  issued  obligations  yielding 9.75%, so
Albritton may tender for its more  expensive  debt early.  This should lower the
bond's  price  volatility  while  still  providing  an  attractive   yield.  Our
Cobblestone bond also carries an 11.5% coupon. Cobblestone owns approximately 25
golf courses,  mostly concentrated in the Phoenix,  Dallas, and San Diego areas.
By focusing on individual  cities,  Cobblestone is able to develop  economies of
scale,  including discounts on equipment and overlapping personnel in such areas
as  maintenance.  The  continuing  shortage of golf  courses is also  working in
Cobblestone's  favor:  Its course  utilization  rates are excellent and it is an
attractive  acquisition  candidate as larger competitors look to increase market
share.

A similar trend toward  consolidation is occurring in the supermarket  industry,
as  regional  operators  are being  acquired by larger  chains.  One of our bond
issuers,  regional  supermarket  chain Smith Food and Drugs,  was bought by Fred
Meyers during the first half of the year.

Looking Ahead

We remain very optimistic on the high-yield bond sector. In the 1990s,  interest
rates  have  been  extremely  volatile,  but  the  higher  coupons  and  shorter
maturities on  high-yield  debt have tended to keep prices less volatile than in
much of the bond market.  So long as the economy remains healthy and stocks hold
their own, the attractive  coupons on high-yield  bonds should  continue to help
mitigate changes in interest rates.  However,  careful investment discipline and
detailed research - including firsthand, on-site visits with senior management -
will continue to be the performance keys in this very exciting market.

Thank you for your continued investment in Janus Aspen High-Yield Portfolio.

- --------------------------------------------------------------------------------
(1)  Index and Portfolio returns include reinvested  dividends.  The Portfolio's
     securities may differ significantly from the securities in the index. Index
     returns  do not  include  taxes on  dividends  and  interest  payments,  or
     operating expenses necessary to maintain a portfolio consisting of the same
     securities that are in the index.  The Portfolio's  return does not reflect
     the  charges  and  expenses  of  any  particular  insurance  product.  Past
     performance is no guarantee of future results.

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 33
<PAGE>

           Janus Aspen High-Yield Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Corporate Bonds - 78.6%
- --------------------------------------------------------------------------------
Airlines - 0.8%
        $10,000   ValuJet, Inc., 10.25%
                    senior notes, due 4/15/01                            $ 9,475
- --------------------------------------------------------------------------------
Automotive - Medium and Heavy Duty Trucks - 2.3%
         25,000   Blue Bird Body Co., 10.75%
                    senior subordinated notes, due 11/15/06               26,687
- --------------------------------------------------------------------------------
Automotive - Truck Parts and Equipment - 2.2%
         25,000   Oxford Automotive, Inc., 10.125%
                    senior subordinated notes, due 6/15/97                25,125
- --------------------------------------------------------------------------------
Beverages - Non-Alcoholic - 1.7%
         20,000   Dr. Pepper Bottling Holdings, zero coupon
                     senior notes, due 2/15/03                            19,850
- --------------------------------------------------------------------------------
Building and Construction - 1.3%
         15,000   Reliant Building Products, Inc., 10.875%
                    senior subordinated notes, due 5/1/04+                15,412
- --------------------------------------------------------------------------------
Cable Television - 1.8%
         10,000   Intermedia Capital Partners, 11.25%
                    senior notes, due 8/1/06                              10,775
         10,000   Rifkin Acquisition Partners, L.P., 11.125%
                    senior subordinated notes, due 1/15/06                10,600
- --------------------------------------------------------------------------------
                                                                          21,375
- --------------------------------------------------------------------------------
Casino Hotels - 0.9%
         10,000   Hollywood Casino Corp., 12.75%
                    senior notes, due 10/1/03                             10,650
- --------------------------------------------------------------------------------
Cellular Telecommunications - 1.4%
         15,000   PriCellular Wireless Corp., 10.75%
                    senior notes, due 11/1/04                             15,769
- --------------------------------------------------------------------------------
Chemicals - Fibers - 0.9%
         10,000   Polytama International Finance B.V., 11.25%
                    guaranteed secured notes, due 6/15/07                 10,325
- --------------------------------------------------------------------------------
Chemicals - Specialty - 1.4%
         15,000   Laroche Industries, 13.00%
                    senior subordinated notes, due 8/15/04                16,519
- --------------------------------------------------------------------------------
Commercial Banks - 1.9%
                  First Nationwide Holdings, Inc.:
         15,000     10.625%, senior subordinated notes,
                     due 10/1/03                                          16,537
          5,000     12.50%, senior notes, due 4/15/03                      5,612
- --------------------------------------------------------------------------------
                                                                          22,149
- --------------------------------------------------------------------------------
Containers - Paper and Plastic - 0.9%
         10,000   Gaylord Container Corp., 9.75%
                    senior notes, due 6/15/07                              9,975
- --------------------------------------------------------------------------------
Cosmetics and Toiletries - 1.4%
         15,000   Renaissance Cosmetics, Inc., 11.75%
                    senior notes, due 2/15/04                             15,675
- --------------------------------------------------------------------------------
Distribution and Wholesale - 0.9%
         10,000   MVE, Inc., 12.50%
                    senior notes, due 2/15/02                             10,237
- --------------------------------------------------------------------------------
Electronic Components - 1.1%
         20,000   Electronic Retailing Systems International, Inc.,
                    zero coupon senior discount notes, due 2/1/04+        13,050
- --------------------------------------------------------------------------------
Electronic Connectors - 0.9%
         10,000   HCC Industries, Inc., 10.75%
                    senior subordinated notes, due 5/15/07                10,500
- --------------------------------------------------------------------------------
Engineering - Research and Development -1.3%
         15,000   Intertek Finance PLC, 10.25%
                    senior subordinated notes, due 11/1/06                15,525
- --------------------------------------------------------------------------------
Finance - Leasing Companies - 2.2%
        $25,000   Ryder Trucks, Inc., 10.00%
                    senior subordinated notes. due 12/1/06               $25,688
- --------------------------------------------------------------------------------
Food - Retail - 8.1%
         10,000   Pathmark Stores, Inc., 11.625%
                    subordinated notes, due 6/15/02                       10,125
         20,000   Smith's Food & Drug Centers, Inc., 11.25%
                    senior subordinated notes, due 5/15/07                23,450
         35,000   Star Markets Co., Inc., 13.00%
                    senior subordinated notes, due 11/1/04                39,681
         20,000   Supermercados Norte, 10.875%
                    bonds, due 2/9/04+                                    20,500
- --------------------------------------------------------------------------------
                                                                          93,756
- --------------------------------------------------------------------------------
Funeral Services and Related Items - 1.4%
         15,000   Prime Succession Acquisition Co., 10.75%
                    senior subordinated notes, due 8/15/04                16,463
- --------------------------------------------------------------------------------
Gambling-Non-Hotel Casinos - 3.1%
         15,000   Casino America, Inc., 12.50%
                    senior notes, due 8/1/03                              15,563
         10,000   Lady Luck Gaming Corp., 11.875%
                    first mortgage notes, due 3/1/01                      10,150
         10,000   Majestic Star Casino L.L.C., 12.75%
                    senior notes, due 5/15/03                             10,938
- --------------------------------------------------------------------------------
                                                                          36,651
- --------------------------------------------------------------------------------
Home Furnishings - 3.3%
         20,000   Cort Furniture Rental, 12.00%
                    senior notes, due 9/1/00                              22,300
         15,000   Lifestyle Furnishings International, Inc., 10.875%
                    company guaranteed notes, due 8/1/06                  16,406
- --------------------------------------------------------------------------------
                                                                          38,706
- --------------------------------------------------------------------------------
Industrial Audio and Video Products - 0.9%
         10,000   Unifrax Investment Corp., 10.50%
                    senior notes, due 11/1/03                             10,363
- --------------------------------------------------------------------------------
Machine Tools and Related Products - 1.8%
         20,000   International Knife & Saw, Inc., 11.375%
                    senior subordinated notes, due 11/15/06               21,450
- --------------------------------------------------------------------------------
Manufacturing - 1.8%
         20,000   Plastic Specialties & Technologies, Inc., 11.25%
                    senior secured notes, due 12/1/03                     21,425
- --------------------------------------------------------------------------------
Medical Products - 1.8%
         20,000   DGS International Finance Co., 10.00%
                    company guaranteed notes, due 6/1/07+                 20,700
- --------------------------------------------------------------------------------
Motion Pictures and Services - 1.4%
         15,000   All American Communications, Inc., 10.875%
                    senior subordinated notes, due 10/15/01               15,750
- --------------------------------------------------------------------------------
Oil Companies - Exploration and Production - 1.1%
         13,000   Belden & Blake Corp., 9.875%
                    senior subordinated notes, due 6/15/07+               12,968
- --------------------------------------------------------------------------------
Recreational Centers - 3.5%
         15,000   Cobblestone Golf Group, Inc., 11.50%
                    senior notes, due 6/1/03                              15,825
         25,000   Six Flags Theme Parks, zero coupon
                    senior subordinated notes, due 6/15/05                25,469
- --------------------------------------------------------------------------------
                                                                          41,294
- --------------------------------------------------------------------------------
Reinsurance - 1.3%
         15,000   Veritas Holdings GmbH, 9.625%
                    senior notes, due 12/15/03+                           15,581
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 34
<PAGE>

           Janus Aspen High-Yield Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Shares or
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Retail - Diversified - 3.2%
        $20,000   Core-Mark International, Inc., 11.375%
                    senior subordinated notes, due 9/15/03              $ 20,925
         15,000   Eye Care Centers of America, 12.00%
                    senior notes, due 10/1/03                             16,369
- --------------------------------------------------------------------------------
                                                                          37,294
- --------------------------------------------------------------------------------
Steel - Producers - 3.7%
         25,000   Ivaco, Inc., 11.50%
                    senior notes, due 9/15/05                             26,938
         15,000   Weirton Steel Corp., 11.375%
                    senior notes, due 7/1/04                              16,013
- --------------------------------------------------------------------------------
                                                                          42,951
- --------------------------------------------------------------------------------
Telecommunication Services - 4.5%
          5,000   Galaxy Telecom, L.P., 12.375%
                    senior subordinated notes, due 10/1/05                 5,325
         10,000   NEXTLINK Communications, L.L.C., 12.50%
                    senior notes, due 4/15/06                             10,625
         10,000   Peoples Telephone Co., Inc., 12.25%
                    senior notes, due 7/15/02                             10,712
         25,000   Verio, Inc., 13.50%
                    units, due 6/15/04+                                   25,125
- --------------------------------------------------------------------------------
                                                                          51,787
- --------------------------------------------------------------------------------
Television - 3.8%
         20,000   Allbritton Communications, 11.50%
                    senior subordinated debentures, due 8/15/04           21,025
         15,000   Radio One, Inc., 7.00%
                    senior subordinated notes, due 5/15/04+               13,331
         10,000   Sinclair Broadcast Group, Inc., 10. 00%
                    senior subordinated notes, due 9/30/05                10,350
- --------------------------------------------------------------------------------
                                                                          44,706
- --------------------------------------------------------------------------------
Textile - Products - 0.9%
         10,000   Glenoit Corp., 11.00%
- --------------------------------------------------------------------------------
                    senior subordinated notes, due 4/15/07+               10,513
- --------------------------------------------------------------------------------
Tobacco - 0.9%
         10,000   Consolidated Cigar Acquisition Corp., 10.50%
                    senior subordinated notes, due 3/1/03                 10,500
- --------------------------------------------------------------------------------
Transportation - Services - 2.7%
         30,000   Atlantic Express Transportation Co., 10.75%
                    company guaranteed notes, due 2/1/04                  31,237
- --------------------------------------------------------------------------------
Transportation - Truck - 0.9%
        $10,000   Chemical Leaman Corp., 10.375%
                    senior notes, due 6/15/05+                        $   10,200
- --------------------------------------------------------------------------------
Wire and Cable Products - 1.9%
         20,000   International Wire Group, 11.75%
                    senior subordinated notes, due 6/1/05                 21,825
- --------------------------------------------------------------------------------
Wireless Telecommunications - 1.3%
         15,000   Telex Communications, Inc., 10.50%
                    senior subordinated notes, due 5/1/07+                15,637
- --------------------------------------------------------------------------------
Total Corporate Bonds (cost $889,460)                                    915,743
- --------------------------------------------------------------------------------
Preferred Stocks - 2.0%
- --------------------------------------------------------------------------------
Savings/Loan/Thrifts - 1.6%
            600   Chevy Chase Savings, 13.00%, Non-Cumulative             18,000
- --------------------------------------------------------------------------------
Telephone - Local - 0.4%
             75   Salomon, Inc., Exchangeable Notes,
                    (Cinncinati Bell, Inc.) 6.25%                          4,781
- --------------------------------------------------------------------------------
Total Preferred Stocks (cost $22,779)                                     22,781
- --------------------------------------------------------------------------------
U.S. Government Agency - 11.6%
       $135,000   Federal Home Loan Mortgage Corp.
                    5.75%, 7/1/97 (amortized cost $135,000)              135,000
- --------------------------------------------------------------------------------
Warrants - 0.1%
             20   Electronic Retailing Systems International, Inc.*
                    (cost $0)                                                800
- --------------------------------------------------------------------------------
Total Investments (total cost $1,047,239) - 92.3%                      1,074,324
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 7.7%             89,062
- --------------------------------------------------------------------------------
Net Assets - 100%                                                     $1,163,386
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 35
<PAGE>

 Janus Aspen Short-Term Bond Portfolio - Portfolio Manager, Sandy R. Rufenacht

Performance Review

During the six months ended June 30, 1997, Janus Aspen Short-Term Bond Portfolio
gained   3.21%,   versus   a   gain   of   2.90%   for   the   Lehman   Brothers
Government/Corporate  1-3 Year Bond  Index.(1) Both returns  include  reinvested
dividends.

The  Portfolio  outperformed  the  Index  because  we were able to add value via
credit research on investment-grade and high-yield corporate bonds. In addition,
our large cash position enabled us to take advantage of investment opportunities
when interest rates became volatile.  The Portfolio's current  configuration has
increased  flexibility  without  compromising  quality, as the average portfolio
rating in the table below indicates.

The bond market  continued  to trade within a clearly  defined  range during the
last six months. The yield on the benchmark 30-year Treasury bond stayed between
6.50% and 7.25%. In the second quarter, the economy began to slow from the rapid
growth of the previous three months. The prospect of continued moderate economic
growth,  combined with low inflation,  sparked a rally in the financial markets,
and bond yields  finished  the period near the low end of their  trading  range.
High-yield bonds were again one of the  best-performing  market sectors,  helped
along by stable interest rates and the very powerful rise in equities.

- --------------------------------------------------------------------------------
Portfolio Asset Mix                  June 30, 1997      December 31, 1996
Investment-Grade Corp. Bonds              52.1%               56.4%
High-Yield/High-Risk (Junk) Bonds         15.1%                --
U.S. Government Securities                19.4%               42.0%
Cash & Cash Equivalents                   13.4%                1.6%
- --------------------------------------------------------------------------------
Portfolio Profile                    June 30, 1997      December 31, 1996
Weighted Avg. Maturity                  2.1 Yrs.             2.0 Yrs.
Avg. Modified Duration*                 1.7 Yrs.             1.8 Yrs.
Avg. Rating                                A+                  AA
Avg. 30-day Yield
  Institutional Shares                    6.36%               5.37%
  Retirement Shares                       5.84%               N/A
- --------------------------------------------------------------------------------
*A theoretical measure of price volatility.

The  Treasury  portion  of  the  portfolio  consists  of a  single  T-bill.  Our
investment-grade  corporate  bonds  continue to include  familiar  names such as
Hewlett-Packard  Finance  Corporation,   IBM,  Lockheed  Martin,  and  Travelers
Insurance.  High-yield  holdings are primarily  "cushion bonds." These are bonds
that are likely to be redeemed before they mature.  Allbritton is a good example
of what we look for in a cushion bond.  Allbritton owns six television  stations
on the east coast.  Our  analysis  indicates  the  company's  ABC  affiliate  in
Washington,  D.C. provides reasonable collateral by itself for the debt offering
we own. These bonds, which carry an 11.5% coupon, are callable in August of this
year. The company  recently  issued bonds with a coupon of 9.75%,  so we believe
Allbritton is likely to redeem its more expensive debt at the first opportunity.

Portfolio Strategy

The  Portfolio is positioned  to respond  quickly to changes in interest  rates.
This  flexibility has been  accomplished  in the context of an  investment-grade
portfolio.  Our Treasury and cash positions lower credit risk, while some of our
high-yield  holdings  help mitigate  interest  rate risk.  This mix allows us to
provide a yield that is competitive with a 30-year Treasury  obligation  without
as much price  volatility.  It also allows us to avoid overpaying for short-term
paper, which remains in relatively short supply due to the low level of interest
rates. In this  environment,  companies have tended to issue more long-term debt
in order to lock in cheaper rates. Also, as interest rate volatility  increased,
investors pulled themselves in on the yield curve - shortening the maturities of
their holdings - which has created additional demand for short-term  obligations
and pushed up prices.

Looking Ahead

The U.S.  economy  now  appears to be growing  at a  moderate  pace.  As long as
inflation remains low, interest rates should continue to be stable. But whatever
the  direction of rates,  the  Portfolio's  flexibility  positions it to respond
effectively. The mix of securities should also keep yields competitive.

Thank  you  for  your  continued  investment  in  Janus  Aspen  Short-Term  Bond
Portfolio.

- --------------------------------------------------------------------------------
(1)  Index and Portfolio returns include reinvested  dividends.  The Portfolio's
     securities may differ significantly from the securities in the index. Index
     returns  do not  include  taxes on  dividends  and  interest  payments,  or
     operating expenses necessary to maintain a portfolio consisting of the same
     securities that are in the index.  The Portfolio's  return does not reflect
     the  charges  and  expenses  of  any  particular  insurance  product.  Past
     performance is no guarantee of future results.

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 36
<PAGE>

        Janus Aspen Short-Term Bond Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Corporate Bonds - 67.2%
- --------------------------------------------------------------------------------
Aerospace and Defense - 3.7%
        $500,000  Lockheed Martin Corp., 6.55%
                    company guaranteed unsecured
                     notes, due 5/15/99                                 $501,875
- --------------------------------------------------------------------------------
Commercial Banks - 3.6%
         500,000  First USA Bank, Inc., 5.75%
                    notes, due 1/15/99                                   495,625
- --------------------------------------------------------------------------------
Computers - Mainframe - 3.6%
         500,000   IBM Corp., 6.375%
                    global notes, due 6/15/00                            498,750
- --------------------------------------------------------------------------------
Computers - Mini - 3.7%
         500,000   Hewlett-Packard, Inc., 6.50%
                    senior unsubordinated notes, due 12/30/99            502,500
- --------------------------------------------------------------------------------
Diversified Financial Services - 3.7%
         500,000  Associates Corp. N.A., 6.375%
                    senior notes, due 8/15/98                            501,465
- --------------------------------------------------------------------------------
Engines - Internal Combustion - 0.9%
         100,000  Imo Industries, Inc., 11.75%
                    senior subordinated notes, due 5/1/06                119,750
- --------------------------------------------------------------------------------
Finance - Auto Loans - 2.9%
         400,000  Chrysler Financial Corp., 6.625%
                    notes, due 8/15/00                                   400,000
- --------------------------------------------------------------------------------
Finance  - Investment  Banker/Broker  - 2.0% 
         275,000  Merrill Lynch & Co., Inc., 6.375%
                    notes, due 3/30/99                                   275,344
- --------------------------------------------------------------------------------
Finance - Leasing Companies - 5.9%
                  International Lease Finance Corp.:
         300,000    6.125% notes, due 11/1/99                            298,125
         250,000    6.625% notes, due 4/1/99                             251,875
         250,000  Pitney Bowes Credit Corp., 6.25%
                    notes, due 6/1/98                                    250,635
- --------------------------------------------------------------------------------
                                                                         800,635
- --------------------------------------------------------------------------------
Food - Diversified - 1.8%
         250,000  Grand Metropolitan Investment Corp., 6.50%
                    company guaranteed notes, due 9/15/99                250,625
- --------------------------------------------------------------------------------
Food - Retail - 4.1%
         215,000  Pathmark Stores, Inc., 12.625%
                    subordinated notes, due 6/15/02                      220,912
         300,000  Star Markets Co., Inc., 13.00%
                    senior subordinated notes, due 11/1/04               340,125
- --------------------------------------------------------------------------------
                                                                         561,037
- --------------------------------------------------------------------------------
Hotels and Motels - 1.8%
         250,000  Hyatt Equities, L.L.C., 6.80%
                    notes, due 5/15/00+                                  250,313
- --------------------------------------------------------------------------------
Life and Health Insurance - 0.4%
         50,000   Penncorp Financial Group, Inc., 9.25%
                    senior subordinated notes, due 12/15/03               52,875
- --------------------------------------------------------------------------------
Multi-Line Insurance - 3.7%
         500,000  Travelers Group, Inc., 5.75%
                    notes, due 4/15/98                                   499,685
- --------------------------------------------------------------------------------
Oil Companies - Integrated - 1.9%
         250,000  Texaco Capital, Inc., 6.875%
                    notes, due 7/15/99                                   252,812
- --------------------------------------------------------------------------------
Paint and Related Products - 3.6%
         500,000  Sherwin-Williams Co., 6.25%
                    notes, due 2/1/00                                    497,500
- --------------------------------------------------------------------------------
Physical Therapy and Rehabilitation Centers - 3.9%
         500,000  HEALTHSOUTH Corp., 9.50%
                    senior subordinated notes, due 4/1/01                528,125
- --------------------------------------------------------------------------------
Retail - Discount - 2.9%
      $  400,000  TJX Companies, Inc., 6.625%
                    notes, due 6/15/00                               $   398,500
- --------------------------------------------------------------------------------
Retail - Diversified - 4.0%
         500,000  Eye Care Centers of America, 12.00%
                    senior notes, due 10/1/03                            545,625
- --------------------------------------------------------------------------------
Savings/Loan/Thrifts - 1.8%
         250,000  Great Western Financial Corp., 6.125%
                    notes, due 6/15/98                                   249,998
- --------------------------------------------------------------------------------
Super-Regional Banks - 1.8%
         250,000  Norwest Corp., 6.25%
                    senior notes, due 4/15/99                            250,000
- --------------------------------------------------------------------------------
Television - 1.9%
         250,000  Allbritton Communications, 11.50%
                    senior subordinated debentures, due 8/15/04          262,813
- --------------------------------------------------------------------------------
Transportation - Railroad - 3.6%
         500,000  Union Pacific Corp., 6.25%
                    notes, due 3/15/99                                   498,125
- --------------------------------------------------------------------------------
Total Corporate Bonds (cost $9,185,001)                                9,193,977
- --------------------------------------------------------------------------------
U.S. Government Obligation - 19.4%
       2,647,000  U.S. Treasury Notes, 6.00%
                    notes, due 11/30/97 (cost $2,651,186)              2,651,632
- --------------------------------------------------------------------------------
U.S. Government Agency - 12.2%
       1,665,000  Federal Home Loan Mortgage Corp.,
                    5.75%, 7/1/97 (amortized cost $1,665,000)          1,665,000
- --------------------------------------------------------------------------------
Total Investments (total cost $13,501,187) - 98.8%                    13,510,609
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 1.2%            162,973
- --------------------------------------------------------------------------------
Net  Assets  - 100%                                                  $13,673,582
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 37
<PAGE>

   Janus Aspen Money Market Portfolio - Portfolio Manager, Sharon S. Pichler

Economic Perspective

During the six months ended June 30, 1997, short-term interest rates as measured
by the yield on the one-year Treasury bill, traded between 6.07% at the high end
and 5.42% on the low end. The Federal  Reserve Board boosted  interest  rates in
late March,  but left rates  unchanged at its May  meeting,  after signs of more
moderate economic growth emerged in the second quarter. Federal Reserve Chairman
Alan Greenspan had been trying to talk  financial  markets into slowing down - a
practice known as "jawboning" - since last fall. However,  longer-term  interest
rates responded more to economic data than to Mr. Greenspan's  warnings,  rising
in anticipation of first quarter economic strength as well as in anticipation of
an increase in short rates. When signs of moderate growth emerged,  longer rates
declined and ended the six months near their lows. Our commitment to flexibility
allowed us to respond quickly to interest rate changes throughout the period.

Portfolio Strategy

For much of the six months, assets remained primarily in very short obligations,
with only a modest  weighting in longer-term  debt (6 months to one year). As of
June 30, the Portfolio's weighted average maturity was just 10 days.

We take a  conservative  stance  when it comes to credit  profiles.  Our  strict
discipline of detailed credit analysis and careful  evaluation of each company's
risk-reward  characteristics  stood us in good stead once again. We were able to
produce a competitive yield with low risk.

Thank you for your investment in Janus Aspen Money Market Portfolio.

- --------------------------------------------------------------------------------
A money market fund is neither  insured nor  guaranteed by the U.S.  government,
and there can be no  assurance  the  Portfolio  will be able to maintain a $1.00
share price.

          Janus Aspen Money Market Portfolio June 30, 1997 (unaudited)

- --------------------------------------------------------------------------------
Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Repurchase Agreement - 22.8%
      $1,500,000  HSBC Securities, Inc., 6.20% dated 6/30/97,
                  maturing 7/1/97, to be repurchased at $1,500,258,
                  collateralized by $1,544,000 in Fannie Mae
                  Discount Notes 6.01%, 8/22/97 and 6.01%, 8/27/97
                  with respective values of $499,766 and $1,030,432
                  (cost $1,500,000)***                               $ 1,500,000
- --------------------------------------------------------------------------------
Short-Term Corporate Note - 6.0%
         400,000  General Motors Acceptance Corp.
                    5.84%, 10/8/97 (amortized cost $393,576)             393,576
- --------------------------------------------------------------------------------
U.S. Government Agencies - 65.0%
         600,000  Fannie Mae
                    5.43%, 7/11/97                                       599,095
         600,000  Federal Farm Credit Bank
                    5.43%, 7/9/97                                        599,276
         285,000  Federal Home Loan Bank
                    5.40%, 7/15/97                                       284,402
       2,800,000  Federal Home Loan Mortgage Corp.
                    5.75%, 7/1/97                                      2,800,000
- --------------------------------------------------------------------------------
Total U.S. Government Agencies (amortized cost $4,282,773)             4,282,773
- --------------------------------------------------------------------------------
Total Investments (total cost $6,176,349) - 93.8%                      6,176,349
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 6.2%            406,498
- --------------------------------------------------------------------------------
Net Assets - 100%                                                     $6,582,847
- --------------------------------------------------------------------------------

See Notes to Schedule of Investments

             JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 38
<PAGE>

                       NOTES TO SCHEDULES OF INVESTMENTS

(ADR) - American Depository Receipt
(GDR) - Global Depository Receipt
(JPY) - Japanese Yen
Adjustable Rate Preferred Stock Dividend Rates are as of 6/30/97
*   Non-Income producing security
**  A portion of this  security has been  segregated  by  the custodian to cover
    segregation requirements on open forward currency contracts.
*** Repurchase  Agreements held by the Portfolio  are fully  collateralized  and
    such  collateral is in the  possession of  the  Portfolio's  custodian.  The
    collateral is evaluated  daily  to ensure its market value equals or exceeds
    the current market value of  the  repurchase  agreements  including  accrued
    interest.
+   Securities  are  registered  pursuant  to Rule 144A and  may be deemed to be
    restricted for resale.

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 39
<PAGE>
<TABLE>
<CAPTION>
STATEMENTS OF ASSETS AND LIABILITIES

As of June 30, 1997 (unaudited)                                   Janus Aspen   Janus Aspen   Janus Aspen   Janus Aspen
(All numbers in thousands except                    Janus Aspen    Aggressive     Capital    International   Worldwide   Janus Aspen
Retirement shares outstanding and                     Growth        Growth     Appreciation     Growth        Growth       Balanced
net asset value per share.)                          Portfolio     Portfolio     Portfolio     Portfolio     Portfolio     Portfolio
- ------------------------------------------------------------------------------------------------------------------------------------
Assets:
<S>                                                 <C>           <C>           <C>           <C>           <C>           <C>       
Investments at cost                                 $  426,413    $  336,527    $      893    $   90,442    $  958,253    $  157,218
====================================================================================================================================
Investments at value                                $  485,921    $  428,399    $      938    $  101,772    $1,148,359    $  169,395
Cash                                                       726           120            40           218        35,619            91
Receivables:
  Investments sold                                       1,540         2,743          --             312         8,007         1,382
  Fund shares sold                                       1,065         1,021             1           778         4,436           709
  Interest                                                --            --            --            --            --             792
  Dividends                                                465            66          --             179         4,336           145
From advisor                                              --            --               1          --            --            --  
Other assets                                                 3             3          --            --               5             2
Foreign currency contracts                                --            --            --             327         5,469          --  
- ------------------------------------------------------------------------------------------------------------------------------------
    Total Assets                                       489,720       432,352           980       103,586     1,206,231       172,516
- ------------------------------------------------------------------------------------------------------------------------------------
Liabilities:
 Payables:
  Investments purchased                                 12,516         5,533            36         4,405         2,655         4,424
  Fund shares repurchased                                   10            27          --            --             569            29
  Advisory fee                                             250           252             1            50           614           102
Accrued expenses                                            25            23             1            13            88            17
Foreign currency contracts                                 382           672          --            --            --              48
- ------------------------------------------------------------------------------------------------------------------------------------
Total Liabilities                                       13,183         6,507            38         4,468         3,926         4,620
- ------------------------------------------------------------------------------------------------------------------------------------
Total Net Assets                                    $  476,537    $  425,845    $      942    $   99,118    $1,202,305    $  167,896
====================================================================================================================================
Total Net Assets - Institutional Shares             $  476,526    $  425,833    $      930    $   99,107    $1,202,294    $  167,885
  Shares Outstanding, $.001 Par Value
   (unlimited shares authorized)                        27,860        22,753            79         5,366        52,676        10,357
  Net Asset Value Per Share                         $    17.10    $    18.72    $    11.75    $    18.47    $    22.82    $    16.23
====================================================================================================================================
Total Net Assets - Retirement Shares                $       11    $       12    $       12    $       11    $       11    $       11
  Shares Outstanding, $.001 Par Value
   (unlimited shares authorized)                           635           620         1,000           599           489           665
  Net Asset Value Per Share                         $    17.09    $    18.70    $    11.74    $    18.45    $    22.80    $    16.21
====================================================================================================================================
</TABLE>
<TABLE>
<CAPTION>
STATEMENTS OF ASSETS AND LIABILITIES (Continued)

As of June 30, 1997 (unaudited)                     Janus Aspen   Janus Aspen                 Janus Aspen   Janus Aspen
(All numbers in thousands except                      Equity       Flexible     Janus Aspen   Short-Term       Money
Retirement shares outstanding and                     Income        Income      High-Yield       Bond          Market
net asset value per share.)                          Portfolio     Portfolio     Portfolio     Portfolio     Portfolio
- -----------------------------------------------------------------------------------------------------------------------
Assets:
<S>                                                 <C>           <C>           <C>           <C>           <C>       
Investments at cost                                 $      422    $   34,237    $    1.047    $   13,501    $    6,176
=======================================================================================================================
Investments at value                                $      462    $   35,054    $    1,074    $   13,511    $    6,176
Cash                                                         5            63          --               2             4
Receivables:
  Investments sold                                           2          --              74          --            --   
  Fund shares sold                                           7           265          --             115           407
  Interest                                                --             570            20           179          --   
  Dividends                                               --            --            --            --            --   
From advisor                                                 1          --               2             6          --   
Other assets                                              --            --            --            --            --   
Foreign currency contracts                                --            --            --            --            --   
- -----------------------------------------------------------------------------------------------------------------------
    Total Assets                                           477        35,952         1,170        13,813         6,587
- -----------------------------------------------------------------------------------------------------------------------
Liabilities:
 Payables:
  Investments purchased                                     44          --            --             122          --   
  Fund shares repurchased                                 --              62          --               6          --   
  Advisory fee                                            --              18             1             7             1
Accrued expenses                                             1             6             6             4             3
Foreign currency contracts                                --            --            --            --            --   
- -----------------------------------------------------------------------------------------------------------------------
Total Liabilities                                           45            86             7           139             4
- -----------------------------------------------------------------------------------------------------------------------
Total Net Assets                                    $      432    $   35,866    $    1,163    $   13,674    $    6,583
=======================================================================================================================
Total Net Assets - Institutional Shares             $      420    $   35,856    $    1,153    $   13,664    $    6,573
  Shares Outstanding, $.001 Par Value
   (unlimited shares authorized)                            36         3,178           104         1,360         6,573
  Net Asset Value Per Share                         $    11.64    $    11.28    $    11.12    $    10.04    $     1.00
=======================================================================================================================
Total Net Assets - Retirement Shares                $       12    $       10    $       10    $       10    $       10
  Shares Outstanding, $.001 Par Value
   (unlimited shares authorized)                         1,000           911           933         1,011        10,066
  Net Asset Value Per Share                         $    11.63    $    11.28    $    11.11    $    10.03    $     1.00
=======================================================================================================================
</TABLE>
<TABLE>
<CAPTION>
STATEMENTS OF OPERATIONS
                                                                  Janus Aspen   Janus Aspen   Janus Aspen   Janus Aspen
For the six month period ended                      Janus Aspen    Aggressive     Capital    International   Worldwide   Janus Aspen
June 30, 1997 (unaudited)                             Growth        Growth     Appreciation     Growth        Growth       Balanced
(All numbers in thousands)                           Portfolio     Portfolio     Portfolio     Portfolio     Portfolio     Portfolio
- ------------------------------------------------------------------------------------------------------------------------------------
Investment Income:
<S>                                                 <C>           <C>           <C>           <C>           <C>           <C>      
  Interest                                          $   1,931     $     958     $       4     $     245     $   1,542     $   1,787
  Dividends                                             2,249           373          --             631         8,549           736
  Foreign Tax Withheld                                   (119)          (21)         --             (83)       (1,046)          (27)
- ------------------------------------------------------------------------------------------------------------------------------------
Total Investment Income                                 4,061         1,310             4           793         9,045         2,496
- ------------------------------------------------------------------------------------------------------------------------------------
Expenses:
  Advisory fees                                         1,291         1,352             1           200         2,824           477
  Transfer agent fees and expenses                          7             4             1          --               6             1
  Registration fees                                         1             3          --            --               8             3
  System fees                                              10             6             1             6             8             6
  Custodian fees                                           71            37          --              85           309            33
  Insurance Expense                                         2             1          --               1             1          --   
  Audit fees                                                6             5          --               4            10             4
  Other expenses                                            3             4          --               1             5             1
- ------------------------------------------------------------------------------------------------------------------------------------
Total Expenses                                          1,391         1,412             3           297         3,171           525
- ------------------------------------------------------------------------------------------------------------------------------------
Less: Expense offset                                       (4)           (9)         --              (1)           (7)           (2)
- ------------------------------------------------------------------------------------------------------------------------------------
Net expenses                                            1,387         1,403             3           296         3,164           523
- ------------------------------------------------------------------------------------------------------------------------------------
Less: Excess expense reimbursement                       --            --              (2)         --            --            --   
- ------------------------------------------------------------------------------------------------------------------------------------
Net expenses after reimbursement                        1,387         1,403             1           296         3,164           523
- ------------------------------------------------------------------------------------------------------------------------------------
Net investment income/(loss)                            2,674           (93)            3           497         5,881         1,973
- ------------------------------------------------------------------------------------------------------------------------------------
Net Realized and Unrealized
 Gain/(Loss) on Investments:
  Net realized gain/(loss)
   from securities transactions                        23,380       (21,007)           15           630        20,256         5,421
  Net realized gain/(loss)
   from foreign currency transactions                    1021          (128)         --             118         5,808           224
  Net realized gain/(loss)
   from futures contracts                                --            --            --             (18)         (316)         --   
  Change in net unrealized appreciation
   or (depreciation) of investments                    23,824        34,332            45         9,675       127,140         7,551
- ------------------------------------------------------------------------------------------------------------------------------------
Net gain/(loss) on investments                         48,225        13,197            60        10,405       152,888        13,196
- ------------------------------------------------------------------------------------------------------------------------------------
Net increase in net assets resulting
 from operations                                    $  50,899     $  13,104     $      63     $  10,902     $ 158,769     $  15,169
====================================================================================================================================
</TABLE>
<TABLE>
<CAPTION>
STATEMENT OF OPERATIONS (Continued)
                                                   Janus Aspen   Janus Aspen                 Janus Aspen   Janus Aspen
For the six month period ended                       Equity       Flexible     Janus Aspen   Short-Term       Money   
June 30, 1997 (unaudited)                            Income        Income      High-Yield       Bond          Market  
(All numbers in thousands)                         Portfolio(1)   Portfolio     Portfolio     Portfolio     Portfolio 
- ----------------------------------------------------------------------------------------------------------------------
Investment Income:
<S>                                                 <C>           <C>           <C>           <C>           <C>      
  Interest                                               --       $   1,108     $      45     $     392     $     188
  Dividends                                         $       1            35             1          --            --   
  Foreign Tax Withheld                                   --            --            --            --            --   
- ----------------------------------------------------------------------------------------------------------------------
Total Investment Income                                     1         1,143            46           392           188
- ----------------------------------------------------------------------------------------------------------------------
Expenses:
  Advisory fees                                          --              95             4            39             9
  Transfer agent fees and expenses                          1          --            --            --            --   
  Registration fees                                      --            --            --               1          --   
  System fees                                               1             5             6             6             6
  Custodian fees                                         --               7             6             4             3
  Insurance Expense                                      --               1          --            --            --
  Audit fees                                                1             5             4             4             1
  Other expenses                                         --            --               1          --            --   
- ----------------------------------------------------------------------------------------------------------------------
Total Expenses                                              3           113            21            54            19
- ----------------------------------------------------------------------------------------------------------------------
Less: Expense offset                                     --              (1)         --            --            --   
- ----------------------------------------------------------------------------------------------------------------------
Net expenses                                                3           112            21            54            19
- ----------------------------------------------------------------------------------------------------------------------
Less: Excess expense reimbursement                         (3)         --             (16)          (15)         --   
- ----------------------------------------------------------------------------------------------------------------------
Net expenses after reimbursement                         --             112             5            39            19
- ----------------------------------------------------------------------------------------------------------------------
Net investment income/(loss)                                1         1,031            41           353           169
- ----------------------------------------------------------------------------------------------------------------------
Net Realized and Unrealized
 Gain/(Loss) on Investments:
  Net realized gain/(loss)
   from securities transactions                             3           131            22            15          --   
  Net realized gain/(loss)
   from foreign currency transactions                    --              12          --            --            --   
  Net realized gain/(loss)
   from futures contracts                                --             (18)         --            --            --   
  Change in net unrealized appreciation
   or (depreciation) of investments                        40           167             2            14          --   
- ----------------------------------------------------------------------------------------------------------------------
Net gain/(loss) on investments                             43           292            24            29          --   
- ----------------------------------------------------------------------------------------------------------------------
Net increase in net assets resulting
 from operations                                    $      44     $   1,323     $      65     $     382     $     169
======================================================================================================================
</TABLE>
(1) For the period May 1, 1997 (inception) to June 30, 1997

See Notes to Financial Statements

          JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 40 AND 41
<PAGE>

<TABLE>
<CAPTION>
STATEMENTS OF CHANGES IN NET ASSETS

For the six months or period
ended June 30, 1997 (unaudited)                                                            Janus Aspen
and the fiscal year or period                                    Janus Aspen               Aggressive
ended December 31, 1996                                            Growth                    Growth
(all numbers in thousands(3))                                     Portfolio                 Portfolio
- ----------------------------------------------------------------------------------------------------------
                                                              1997         1996         1997         1996
- ----------------------------------------------------------------------------------------------------------
Operations:
<S>                                                    <C>          <C>          <C>          <C>         
Net investment income/(loss)                           $     2,674  $     2,996  ($       93) $      (789)
Net realized gain/(loss)
 from investment transactions                               24,401       10,156      (21,135)     (12,093)
Change in unrealized net appreciation
 or (depreciation) of investments                           23,824       20,898       34,332       27,841
- ----------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets
  resulting from operations                                 50,899       34,050       13,104       14,959
- ----------------------------------------------------------------------------------------------------------
Dividends and Distributions:
Net investment income                                       (2,720)      (3,002)         --           --  
Net realized gain from
 investment transactions                                    (9,976)      (3,331)         --        (3,020)
Tax Return of Capital                                          --           --           --          (220)
- ----------------------------------------------------------------------------------------------------------
Net decrease in net assets
 from dividends and distributions                          (12,696)      (6,333)         --        (3,240)
- ----------------------------------------------------------------------------------------------------------
Capital Share Transactions:
Shares sold
  Institutional Shares                                     125,026      183,993       91,634      210,533
  Retirement Shares                                             10          --            10          --  
Reinvested dividends and distributions
  Institutional Shares                                      12,696        6,333          --         3,240
  Retirement Shares                                            --           --           --           --  
Shares repurchased
  Institutional Shares                                     (25,187)     (19,165)     (62,596)     (27,710)
  Retirement Shares                                            --           --           --           --  
- ----------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets
 from capital share transactions                           112,545      171,161       29,048      186,063
- ----------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets                      150,748      198,878       42,152      197,782
- ----------------------------------------------------------------------------------------------------------
Net Assets:
Beginning of period                                        325,789      126,911      383,693      185,911
- ----------------------------------------------------------------------------------------------------------
End of Period                                          $   476,537  $   325,789  $   425,845  $   383,693
==========================================================================================================
Net Assets consist of:
Capital (par value and paid-in surplus)*               $   392,975  $   280,430  $   369,169  $   337,407
Undistributed net investment
 income/(distribution in excess)*                               77          123       (3,487)           2
Undistributed net realized
 gain/(loss) from investments*                              24,362        9,937      (31,033)     (10,580)
Unrealized appreciation/(depreciation)
 of investments                                             59,123       35,299       91,196       56,864
- ----------------------------------------------------------------------------------------------------------
                                                       $   476,537  $   325,789  $   425,845  $   383,693
==========================================================================================================
Transactions in Portfolio Shares - Institutional Shares
Shares sold                                                  7,661       12,447        5,310       11,507
Reinvested dividends and distributions                         740          426          --           176
- ----------------------------------------------------------------------------------------------------------
Total                                                        8,401       12,873        5,310       11,683
Shares Repurchased                                          (1,544)      (1,306)      (3,598)      (1,528)
- ----------------------------------------------------------------------------------------------------------
Net increase/decrease in portfolio shares                    6,854       11,567        1,712       10,155
- ----------------------------------------------------------------------------------------------------------
Shares outstanding beginning of period                      21,003        9,436       21,041       10,885
- ----------------------------------------------------------------------------------------------------------
Shares outstanding end of period                            27,860       21,003       22,753       21,040
==========================================================================================================
Transactions in Portfolio Shares - Retirement Shares(3)
Shares sold                                                    618          --           620          --  
Reinvested dividends and distributions                          17          --           --           --  
- ----------------------------------------------------------------------------------------------------------
Total                                                          635          --           620          --  
Shares Repurchased                                             --           --           --           --  
- ----------------------------------------------------------------------------------------------------------
Net increase/decrease in portfolio shares                      635          --           620          --  
- ----------------------------------------------------------------------------------------------------------
Shares outstanding beginning of period                         --           --           --           --  
- ----------------------------------------------------------------------------------------------------------
Shares outstanding end of period                               635          --           620          --  
==========================================================================================================
Purchases and Sales of Investment Securities:
  (excluding Short-Term Securities)
Purchases of Securities                                $   323,749  $   279,406  $   208,061  $   411,187
Proceeds from Sales of Securities                          217,677      151,544      184,493      242,452
Purchases of Long-Term
 U.S. Government Obligations                                   --           --           --           --  
Proceeds from Sales of Long-Term
 U.S. Government Obligations                                   --           --           --           --  
==========================================================================================================
</TABLE>
<TABLE>
<CAPTION>
STATEMENTS OF CHANGES IN NET ASSETS (Continued)

For the six months or period
ended June 30, 1997 (unaudited)                         Janus Aspen           Janus Aspen               Janus Aspen
and the fiscal year or period                             Capital            International               Worldwide
ended December 31, 1996                                Appreciation             Growth                    Growth
(all numbers in thousands(3))                            Portfolio             Portfolio                 Portfolio
- -----------------------------------------------------------------------------------------------------------------------
                                                           1997            1997         1996         1997         1996
- -----------------------------------------------------------------------------------------------------------------------
Operations:                                     
<S>                                                      <C>          <C>          <C>          <C>          <C>      
Net investment income/(loss)                             $       3    $     497    $      46    $   5,881    $   2,521
Net realized gain/(loss)
 from investment transactions                                   15          730          261       25,748       11,302
Change in unrealized net appreciation
 or (depreciation) of investments                               45        9,675        1,663      127,140       54,851
- -----------------------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets
  resulting from operations                                     63       10,902        1,970      158,769       68,674
- -----------------------------------------------------------------------------------------------------------------------
Dividends and Distributions:
Net investment income                                          --          (467)         (76)      (7,302)      (4,109)
Net realized gain from
 investment transactions                                       --          (220)         (83)      (8,190)      (3,028)
Tax Return of Capital                                          --           --           --           --           --  
- -----------------------------------------------------------------------------------------------------------------------
Net decrease in net assets
 from dividends and distributions                              --          (687)        (159)     (15,492)      (6,137)
- -----------------------------------------------------------------------------------------------------------------------
Capital Share Transactions:
Shares sold
  Institutional Shares                                       1,751       68,203       26,943      483,339      431,848
  Retirement Shares                                             10           10          --            10          --  
Reinvested dividends and distributions
  Institutional Shares                                         --           687          159       15,492        6,137
  Retirement Shares                                            --           --           --           --           --  
Shares repurchased
  Institutional Shares                                        (882)      (7,189)      (3,329)     (22,416)     (26,482)
  Retirement Shares                                            --           --           --           --           --  
- -----------------------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets
 from capital share transactions                               879       61,711       23,773      476,425      411,503
- -----------------------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets                          942       71,926       25,584      619,702      474,040
- -----------------------------------------------------------------------------------------------------------------------
Net Assets:
Beginning of period                                            --        27,192        1,608      582,603      108,563
- -----------------------------------------------------------------------------------------------------------------------
End of Period                                            $     942    $  99,118    $  27,192   $1,202,305    $ 582,603
=======================================================================================================================
Net Assets consist of:
Capital (par value and paid-in surplus)*                 $     879    $  86,702    $  24,992    $ 981,166    $ 504,741
Undistributed net investment
 income/(distribution in excess)*                                3           41           12          165       (1,586)
Undistributed net realized
 gain/(loss) from investments*                                  15          718          207       25,444        7,886
Unrealized appreciation/(depreciation)
 of investments                                                 45       11,657        1,981      195,530       68,390
- -----------------------------------------------------------------------------------------------------------------------
                                                         $     942    $  99,118    $  27,192   $1,202,305    $ 582,603
=======================================================================================================================
Transactions in Portfolio Shares - Institutional Shares
Shares sold                                                    156        4,014        1,817       23,097       24,029
Reinvested dividends and distributions                         --            36           11          675          328
- -----------------------------------------------------------------------------------------------------------------------
Total                                                          156        4,050        1,828       23,772       24,357
Shares Repurchased                                             (77)        (414)        (233)      (1,064)      (1,479)
- -----------------------------------------------------------------------------------------------------------------------
Net increase/decrease in portfolio shares                       79        3,636        1,595       22,708       22,878
- -----------------------------------------------------------------------------------------------------------------------
Shares outstanding beginning of period                         --         1,730          135       29,968        7,090
- -----------------------------------------------------------------------------------------------------------------------
Shares outstanding end of period                                79        5,366        1,730       52,676       29,968
=======================================================================================================================
Transactions in Portfolio Shares - Retirement Shares(3)
Shares sold                                                  1,000          595          --           483          --  
Reinvested dividends and distributions                         --             4          --             6          --  
- -----------------------------------------------------------------------------------------------------------------------
Total                                                        1,000          599          --           489          --  
Shares Repurchased                                             --           --           --           --           --  
- -----------------------------------------------------------------------------------------------------------------------
Net increase/decrease in portfolio shares                    1,000          599          --           489          --  
- -----------------------------------------------------------------------------------------------------------------------
Shares outstanding beginning of period                         --           --           --           --           --  
- -----------------------------------------------------------------------------------------------------------------------
Shares outstanding end of period                             1,000          599          --           489          --  
=======================================================================================================================
Purchases and Sales of Investment Securities:
  (excluding Short-Term Securities)
Purchases of Securities                                  $     323    $  79,999    $  19,784      763,472    $ 532,495
Proceeds from Sales of Securities                               99       12,660        3,941      272,679      170,371
Purchases of Long-Term
 U.S. Government Obligations                                   --           564          --           --           --  
Proceeds from Sales of Long-Term
 U.S. Government Obligations                                   --           --           --           --           --  
====================================================================================================================================
</TABLE>
<TABLE>
<CAPTION>
STATEMENTS OF CHANGES IN NET ASSETS (Continued)

For the six months or period
ended June 30, 1997 (unaudited)                                                    Janus Aspen          Janus Aspen
and the fiscal year or period                                    Janus Aspen         Equity              Flexible
ended December 31, 1996                                           Balanced           Income               Income
(all numbers in thousands(3))                                     Portfolio         Portfolio            Portfolio
- -----------------------------------------------------------------------------------------------------------------------
                                                              1997         1996        1997          1997         1996
- -----------------------------------------------------------------------------------------------------------------------
Operations:                                 
<S>                                                      <C>          <C>          <C>          <C>          <C>      
Net investment income/(loss)                             $   1,973    $   1,270    $       1    $   1,031    $   1,307
Net realized gain/(loss)
 from investment transactions                                5,645        1,768            3          125          324
Change in unrealized net appreciation
 or (depreciation) of investments                            7,551        3,680           40          167          277
- -----------------------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets
  resulting from operations                                 15,169        6,718           44        1,323        1,908
- -----------------------------------------------------------------------------------------------------------------------
Dividends and Distributions:
Net investment income                                       (2,029)      (1,165)         --        (1,042)      (1,255)
Net realized gain from
 investment transactions                                    (1,791)        (278)         --          (322)        (272)
Tax Return of Capital                                          --           --           --           --           --  
- -----------------------------------------------------------------------------------------------------------------------
Net decrease in net assets
 from dividends and distributions                           (3,820)      (1,443)         --        (1,364)      (1,527)
- -----------------------------------------------------------------------------------------------------------------------
Capital Share Transactions:
Shares sold
  Institutional Shares                                      69,201       72,698          378       13,840       20,543
  Retirement Shares                                             10          --            10           10          --  
Reinvested dividends and distributions
  Institutional Shares                                       4,669        1,443          --         1,364        1,527
  Retirement Shares                                            --           --           --           --           --  
Shares repurchased
  Institutional Shares                                      (2,813)      (7,957)         --        (4,622)      (7,967)
  Retirement Shares                                            --           --           --           --           --  
- -----------------------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets
 from capital share transactions                            71,067       66,184          388       10,592       14,103
- -----------------------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets                       82,416       71,459          432       10,551       14,484
- -----------------------------------------------------------------------------------------------------------------------
Net Assets:
Beginning of period                                         85,480       14,021          --        25,315       10,831
- -----------------------------------------------------------------------------------------------------------------------
End of Period                                            $ 167,896    $  85,480    $     432    $  35,866    $  25,315
=======================================================================================================================
Net Assets consist of:
Capital (par value and paid-in surplus)*                 $ 150,097    $  79,031    $     388    $  34,888    $  24,297
Undistributed net investment
 income/(distribution in excess)*                             (213)         114            1           36           46
Undistributed net realized
 gain/(loss) from investments*                               5,882        1,758            3          125          322
Unrealized appreciation/(depreciation)
 of investments                                             12,130        4,577           40          817          650
- -----------------------------------------------------------------------------------------------------------------------
                                                         $ 167,896    $  85,480    $     432    $  35,866    $  25,315
=======================================================================================================================
Transactions in Portfolio Shares - Institutional Shares
Shares sold                                                  4,457        5,179           36        1,211        1,853
Reinvested dividends and distributions                         293          101          --           121          139
- -----------------------------------------------------------------------------------------------------------------------
Total                                                        4,750        5,280           36        1,332        1,992
Shares Repurchased                                            (182)        (567)         --          (406)        (715)
- -----------------------------------------------------------------------------------------------------------------------
Net increase/decrease in portfolio shares                    4,568        4,713           36          926        1,277
- -----------------------------------------------------------------------------------------------------------------------
Shares outstanding beginning of period                       5,789        1,076          --         2,252          975
- -----------------------------------------------------------------------------------------------------------------------
Shares outstanding end of period                            10,357        5,789           36        3,178        2,252
=======================================================================================================================
Transactions in Portfolio Shares - Retirement Shares(3)
Shares sold                                                    650          --         1,000          876          --  
Reinvested dividends and distributions                          15          --           --            35          --  
- -----------------------------------------------------------------------------------------------------------------------
Total                                                          665          --         1,000          911          --  
Shares Repurchased                                             --           --           --           --           --  
- -----------------------------------------------------------------------------------------------------------------------
Net increase/decrease in portfolio shares                      665          --         1,000          911          --  
- -----------------------------------------------------------------------------------------------------------------------
Shares outstanding beginning of period                         --           --           --           --           --  
- -----------------------------------------------------------------------------------------------------------------------
Shares outstanding end of period                               665          --         1,000          911          --  
=======================================================================================================================
Purchases and Sales of Investment Securities:
  (excluding Short-Term Securities)
Purchases of Securities                                  $ 106,181    $  95,054    $     409    $  17,023    $  44,707
Proceeds from Sales of Securities                           51,917       39,718           25       11,288       34,221
Purchases of Long-Term
 U.S. Government Obligations                                22,826        4,833          --         3,903        7,738
Proceeds from Sales of Long-Term
 U.S. Government Obligations                                10,698        2,154          --         1,023        6,051
=======================================================================================================================
</TABLE>
<TABLE>
<CAPTION>
STATEMENTS OF CHANGES IN NET ASSETS (Continued)

For the six months or period
ended June 30, 1997 (unaudited)                                                           Janus Aspen
and the fiscal year or period                                  Janus Aspen                 Short-Term                Janus Aspen
ended December 31, 1996                                         High-Yield                    Bond                  Money Market
(all numbers in thousands(3))                                    Portfolio                  Portfolio                 Portfolio
- ------------------------------------------------------------------------------------------------------------------------------------
                                                             1997          1996         1997         1996         1997         1996
- ------------------------------------------------------------------------------------------------------------------------------------
Operations:                                     
<S>                                                      <C>          <C>          <C>          <C>          <C>          <C>      
Net investment income/(loss)                             $      41    $      26    $     353    $     389    $     169    $     183
Net realized gain/(loss)
 from investment transactions                                   22            6           15            4          --           --  
Change in unrealized net appreciation
 or (depreciation) of investments                                2           26           14          (28)         --           --  
- ------------------------------------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets
  resulting from operations                                     65           58          382          365          169          183
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends and Distributions:
Net investment income                                          (43)         (24)        (324)        (370)        (169)        (183)
Net realized gain from
 investment transactions                                        (6)         --            (4)          (6)         --           --  
Tax Return of Capital                                          --           --           --           --           --           --  
- ------------------------------------------------------------------------------------------------------------------------------------
Net decrease in net assets
 from dividends and distributions                              (49)         (24)        (328)        (376)        (169)        (183)
- ------------------------------------------------------------------------------------------------------------------------------------
Capital Share Transactions:
Shares sold
  Institutional Shares                                         755        1,491        7,394       13,981       25,036       28,902
  Retirement Shares                                             10          --            10          --            10          --  
Reinvested dividends and distributions
  Institutional Shares                                          48           24          329          376          168          184
  Retirement Shares                                            --           --           --           --           --           --  
Shares repurchased
  Institutional Shares                                        (449)        (766)      (6,014)      (5,632)     (24,737)     (24,715)
  Retirement Shares                                            --           --           --           --           --           --  
- ------------------------------------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets
 from capital share transactions                               364          749        1,719        8,725          477        4,371
- ------------------------------------------------------------------------------------------------------------------------------------
Net increase/(decrease) in net assets                          380          783        1,773        8,714          477        4,371
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets:
Beginning of period                                            783          --        11,901        3,187        6,106        1,735
- ------------------------------------------------------------------------------------------------------------------------------------
End of Period                                            $   1,163    $     783    $  13,674    $  11,901    $   6,583    $   6,106
====================================================================================================================================
Net Assets consist of:
Capital (par value and paid-in surplus)*                 $   1,114    $     749    $  13,586    $  11,866    $   6,583    $   6,106
Undistributed net investment
 income/(distribution in excess)*                              --             2           66           36          --           --  
Undistributed net realized
 gain/(loss) from investments*                                  22            6           13            3          --           --  
Unrealized appreciation/(depreciation)
 of investments                                                 27           26            9           (4)         --           --  
- ------------------------------------------------------------------------------------------------------------------------------------
                                                         $   1,163    $     783    $  13,674    $  11,901    $   6,583    $   6,106
====================================================================================================================================
Transactions in Portfolio Shares - Institutional Shares
Shares sold                                                     67          140          729        1,398       25,036       28,902
Reinvested dividends and distributions                           5            2           33           38          168          184
- ------------------------------------------------------------------------------------------------------------------------------------
Total                                                           72          142          762        1,436       25,204       29,086
Shares Repurchased                                             (40)         (70)        (595)        (561)     (24,737)     (24,715)
- ------------------------------------------------------------------------------------------------------------------------------------
Net increase/decrease in portfolio shares                       32           72          167          875          467        4,371
- ------------------------------------------------------------------------------------------------------------------------------------
Shares outstanding beginning of period                          72          --         1,193          318        6,106        1,735
- ------------------------------------------------------------------------------------------------------------------------------------
Shares outstanding end of period                               104           72        1,360        1,193        6,573        6,106
====================================================================================================================================
Transactions in Portfolio Shares - Retirement Shares(3)
Shares sold                                                    894          --           986          --        10,000          --  
Reinvested dividends and distributions                          39          --            25          --            66          --  
- ------------------------------------------------------------------------------------------------------------------------------------
Total                                                          933          --         1,011          --        10,066          --  
Shares Repurchased                                             --           --           --           --           --           --  
- ------------------------------------------------------------------------------------------------------------------------------------
Net increase/decrease in portfolio shares                      933          --         1,011          --        10,066          --  
- ------------------------------------------------------------------------------------------------------------------------------------
Shares outstanding beginning of period                         --           --           --           --           --           --  
- ------------------------------------------------------------------------------------------------------------------------------------
Shares outstanding end of period                               933          --         1,011          --        10,066          --  
====================================================================================================================================
Purchases and Sales of Investment Securities:
  (excluding Short-Term Securities)
Purchases of Securities                                  $   1,939    $   1,595    $   5,452    $  13,059          --           --  
Proceeds from Sales of Securities                            1,815          871        4,388        8,202          --           --  
Purchases of Long-Term
 U.S. Government Obligations                                   --           --         4,080       24,287          --           --  
Proceeds from Sales of Long-Term
 U.S. Government Obligations                                   --           --         5,170       21,010          --           --  
====================================================================================================================================
</TABLE>
(1) Period May 1, 1997 (inception) to June 30, 1997
(2) Period May 1, 1996 (inception) to December 31, 1996
(3) Transactions  in Portfolio  Shares - Retirement  Shares  numbers are  not in
    thousands.
 *  See Note 3 in Notes to Financial Statements

See Notes to Financial Statements

          JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 42 AND 43
<PAGE>
<TABLE>
<CAPTION>

FINANCIAL HIGHLIGHTS - INSTITUTIONAL SHARES

For a share outstanding during the                                                           Janus Aspen 
six months or period ended June 30, 1997 (unaudited)                                            Growth   
and the fiscal year or period ended December 31                                                Portfolio 
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                1997             1996             1995           1994       1993(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                           <C>              <C>              <C>            <C>           <C>   
Net asset value, beginning of period                          $15.51           $13.45           $10.57         $10.32        $10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations
Net investment income/(loss)                                     .10              .17              .28            .09           .03
Net gains or (losses) on securities
(both realized and unrealized)                                  1.96             2.29             2.90            .20           .32
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                                2.06             2.46             3.18            .29           .35
- ------------------------------------------------------------------------------------------------------------------------------------
Less distributions
Dividends (from net investment income)                          (.10)            (.17)            (.30)          (.04)         (.03)
Dividends (in excess of net investment income)                  (.37)            (.23)              --             --            -- 
Tax Return of Capital Distributions                               --               --               --             --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total distributions                                             (.47)            (.40)            (.30)          (.04)         (.03)
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $17.10           $15.51           $13.45         $10.57        $10.32
====================================================================================================================================
Total return**                                                13.27%           18.45%           30.17%          2.76%         3.50%
====================================================================================================================================
Net assets, end of period (in thousands)                    $476,526         $325,789         $126,911        $43,549        $7,482
Average net assets for the period (in thousands)             398,595          216,125           77,344         26,464         3,191
Ratio of gross expenses to average net assets*(6)              0.70%            0.69%            0.78%            N/A           N/A
Ratio of net expenses to average net assets*(6)                0.70%            0.69%            0.76%          0.88%         0.25%
Ratio of net investment income to average net assets*          1.34%            1.39%            1.24%          1.45%         2.54%
Portfolio turnover rate*                                        133%              87%             185%           169%          162%
Average commission per share                                 $0.0472          $0.0466              N/A            N/A           N/A
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
<TABLE>
<CAPTION>
FINANCIAL HIGHLIGHTS - INSTITUTIONAL SHARES (Continued)                                                 
                                                                                             
For a share outstanding during the                                                            Janus Aspen          
six months or period ended June 30, 1997 (unaudited)                                       Aggressive Growth      
and the fiscal year or period ended December 31                                                Portfolio          
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                1997             1996             1995           1994       1993(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                           <C>              <C>              <C>            <C>           <C>   
Net asset value, beginning of period                          $18.24           $17.08           $13.62         $11.80        $10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations
Net investment income/(loss)                                     .01               --              .24            .11           .01
Net gains or (losses) on securities
(both realized and unrealized)                                   .47             1.36             3.47           1.82          1.80
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                                 .48             1.36             3.71           1.93          1.81
- ------------------------------------------------------------------------------------------------------------------------------------
Less distributions
Dividends (from net investment income)                            --               --             (.25)          (.11)         (.01)
Dividends (in excess of net investment income)                    --             (.19)              --             --            -- 
Tax Return of Capital Distributions                               --             (.01)              --             --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total distributions                                               --             (.20)            (.25)          (.11)         (.01)
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $18.72           $18.24           $17.08         $13.62        $11.80
====================================================================================================================================
Total return**                                                 2.63%            7.95%           27.48%         16.33%        18.05%
====================================================================================================================================
Net assets, end of period (in thousands)                    $425,833         $383,693         $185,911        $41,289        $1,985
Average net assets for the period (in thousands)             375,225          290,629          107,582         14,152         1,091
Ratio of gross expenses to average net assets*(6)              0.75%            0.76%            0.86%            N/A           N/A
Ratio of net expenses to average net assets*(6)                0.75%            0.76%            0.84%          1.05%         0.25%
Ratio of net investment income to average net assets*         (0.04%)          (0.27%)           0.58%          2.18%         0.34%
Portfolio turnover rate*                                        108%              88%             155%           259%           31%
Average commission per share                                 $0.0364          $0.0347              N/A            N/A           N/A
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
<TABLE>
<CAPTION>
FINANCIAL HIGHLIGHTS - INSTITUTIONAL SHARES (Continued)
                                                           Janus Aspen
For a share outstanding during the                           Capital                                  Janus Aspen          
six months or period ended June 30, 1997 (unaudited)      Appreciation                            International Growth 
and the fiscal year or period ended December 31             Portfolio                                  Portfolio            
- ------------------------------------------------------------------------------------------------------------------------------------
                                                             1997(2)             1997             1996           1995       1994(3)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                           <C>              <C>              <C>             <C>         <C>   
Net asset value, beginning of period                          $10.00           $15.72           $11.95          $9.72       $10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations
Net investment income/(loss)                                     .04              .09              .05            .09         (.09)
Net gains or (losses) on securities
(both realized and unrealized)                                  1.71             2.79             4.06           2.16         (.19)
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                                1.75             2.88             4.11           2.25         (.28)
- ------------------------------------------------------------------------------------------------------------------------------------
Less distributions
Dividends (from net investment income)                          --               (.09)            (.11)          (.02)        -- 
Dividends (in excess of net investment income)                  --               (.04)            (.23)          --           -- 
Tax Return of Capital Distributions                             --               --               --             --           -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total distributions                                             --               (.13)            (.34)          (.02)        -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $11.75           $18.47           $15.72         $11.95        $9.72
====================================================================================================================================
Total return**                                                17.51%           18.31%           34.71%         23.15%       (2.80%)
====================================================================================================================================
Net assets, end of period (in thousands)                        $930          $99,107          $27,192         $1,608       $1,353
Average net assets for the period (in thousands)                 599           58,899            7,437          1,792        1,421
Ratio of gross expenses to average net assets*(6)              1.25%            1.02%            1.26%          2.69%          N/A
Ratio of net expenses to average net assets*(6)                1.25%            1.01%            1.25%          2.50%        2.50%
Ratio of net investment income to average net assets*          3.20%            1.70%            0.62%          (.80%       (1.30%)
Portfolio turnover rate*                                        273%              49%              65%           211%         275%
Average commission per share                                 $0.0462          $0.0231          $0.0305            N/A          N/A
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
<TABLE>
<CAPTION>
FINANCIAL HIGHLIGHTS - INSTITUTIONAL SHARES (Continued)
                                                                                           
For a share outstanding during the                                                             Janus Aspen               
six months or period ended June 30, 1997 (unaudited)                                        Worldwide Growth  
and the fiscal year or period ended December 31                                                 Portfolio                  
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                1997             1996             1995           1994       1993(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                           <C>              <C>              <C>            <C>           <C>   
Net asset value, beginning of period                          $19.44           $15.31           $12.07         $11.89        $10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations
Net investment income/(loss)                                     .09              .16              .11            .04           .02
Net gains or (losses) on securities
(both realized and unrealized)                                  3.59               27             3.19            .14          1.89
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                                3.68             4.43             3.30            .18          1.91
- ------------------------------------------------------------------------------------------------------------------------------------
Less distributions
Dividends (from net investment income)                          (.14)            (.17)            (.06)            --          (.01)
Dividends (in excess of net investment income)                  (.16)            (.13)              --             --          (.01)
Tax Return of Capital Distributions                               --               --               --             --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total distributions                                             (.30)            (.30)            (.06)            --          (.02)
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $22.82           $19.44           $15.31         $12.07        $11.89
====================================================================================================================================
Total return**                                                18.92%           29.04%           27.37%          1.53%        19.10%
====================================================================================================================================
Net assets, end of period (in thousands)                  $1,202,294         $582,603         $108,563        $37,728        $4,856
Average net assets for the period (in thousands)             865,993          304,111           59,440         22,896         2,200
Ratio of gross expenses to average net assets*(6)              0.74%            0.80%            0.90%            N/A           N/A
Ratio of net expenses to average net assets*(6)                0.74%            0.80%            0.87%          1.18%         0.25%
Ratio of net investment income to average net assets*          1.37%            0.83%            0.95%          0.50%         0.84%
Portfolio turnover rate*                                         67%              62%             113%           217%           57%
Average commission per share                                 $0.0321          $0.0345              N/A            N/A           N/A
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
<TABLE>
<CAPTION>
FINANCIAL HIGHLIGHTS - INSTITUTIONAL SHARES (Continued)

For a share outstanding during the                                                            Janus Aspen
six months or period ended June 30, 1997 (unaudited)                                           Balanced  
and the fiscal year or period ended December 31                                                Portfolio 
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                1997             1996             1995           1994       1993 (1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                           <C>              <C>              <C>            <C>           <C>   
Net asset value, beginning of period                          $14.77           $13.03           $10.63         $10.64        $10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations
Net investment income/(loss)                                     .21              .32              .17            .15           .08
Net gains or (losses) on securities
(both realized and unrealized)                                  1.63             1.81             2.45           (.06)          .64
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                                1.84             2.13             2.62            .09           .72
- ------------------------------------------------------------------------------------------------------------------------------------
Less distributions
Dividends (from net investment income)                         (0.20)            (.30)            (.22)          (.10)         (.08)
Dividends (in excess of net investment income)                 (0.18)            (.09)              --             --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total distributions                                            (0.38)            (.39)            (.22)          (.10)         (.08)
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $16.23           $14.77           $13.03         $10.63        $10.64
====================================================================================================================================
Total return**                                                12.32%           16.18%           24.79%          0.84%         7.20%
====================================================================================================================================
Net assets, end of period (in thousands)                    $167,885          $85,480          $14,021         $3,153          $537
Average net assets for the period (in thousands)             123,037           43,414            5,739          2,336           521
Ratio of gross expenses to average net assets*(6)              0.86%            0.94%            1.37%            N/A           N/A
Ratio of net expenses to average net assets*(6)                0.86%            0.92%            1.30%          1.57%         0.25%
Ratio of net investment income to average net assets*          3.28%            2.92%            2.41%          1.90%         2.69%
Portfolio turnover rate*                                        108%             103%             149%           158%          126%
Average commission per share                                 $0.0477          $0.0426              N/A            N/A           N/A
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
<TABLE>
<CAPTION>
FINANCIAL HIGHLIGHTS - INSTITUTIONAL SHARES (Continued)                                     
                                                                                            
For a share outstanding during the                                                            Janus Aspen         
six months or period ended June 30, 1997 (unaudited)                                        Flexible Income    
and the fiscal year or period ended December 31                                                Portfolio         
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                1997             1996             1995           1994      1993 (1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                           <C>              <C>               <C>            <C>          <C>   
Net asset value, beginning of period                          $11.24           $11.11            $9.48          $9.97        $10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations
Net investment income/(loss)                                     .33              .74              .53            .47           .11
Net gains or (losses) on securities
(both realized and unrealized)                                   .16              .24             1.70           (.56)         (.04)
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                                 .49              .98             2.23           (.09)          .07
- ------------------------------------------------------------------------------------------------------------------------------------
Less distributions
Dividends (from net investment income)                          (.34)            (.72)            (.60)          (.40)         (.10)
Dividends (in excess of net investment income)                  (.11)            (.13)              --             --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total distributions                                             (.45)            (.85)            (.60)          (.40)         (.10)
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $11.28           $11.24           $11.11          $9.48         $9.97
====================================================================================================================================
Total return**                                                 4.35%            9.19%           23.86%         (0.91%)        0.70%
====================================================================================================================================
Net assets, end of period (in thousands)                     $35,856          $25,315          $10,831         $1,924          $538
Average net assets for the period (in thousands)              29,566           17,889            5,556          1,636           497
Ratio of gross expenses to average net assets*(6)              0.77%            0.84%            1.07%            N/A           N/A
Ratio of net expenses to average net assets*(6)                0.76%            0.83%            1.00%          1.00%         1.00%
Ratio of net investment income to average net assets*          7.03%            7.31%            7.46%          5.49%         3.77%
Portfolio turnover rate*                                         95%             250%             236%           234%          508%
Average commission per share                                     N/A              N/A              N/A            N/A           N/A
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
<TABLE>
<CAPTION>
FINANCIAL HIGHLIGHTS - INSTITUTIONAL SHARES (Continued)                 
                                                       Janus Aspen
For a share outstanding during the                       Equity       Janus Aspen                       Janus Aspen  
six months or period ended June 30, 1997 (unaudited)     Income       High-Yield                      Short-Term Bond
and the fiscal year or period ended December 31         Portfolio      Portfolio                          Portfolio  
- -----------------------------------------------------------------------------------------------------------------------------------
                                                         1997(2)     1997   1996(4)      1997      1996     1995     1994   1993(1)
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>       <C>      <C>       <C>       <C>       <C>      <C>      <C>    
Net asset value, beginning of period                     $ 10.00   $10.83   $ 10.00   $  9.97   $ 10.03   $ 9.72   $ 9.93   $10.00 
- -----------------------------------------------------------------------------------------------------------------------------------
Income from investment operations                        
Net investment income/(loss)                                 .02      .47       .43       .26       .42      .60      .35      .11 
Net gains or (losses) on securities                      
(both realized and unrealized)                              1.62      .31       .80       .06      (.03)     .31     (.26)    (.08)
- -----------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                            1.64      .78      1.23       .32       .39      .91      .09      .03 
- -----------------------------------------------------------------------------------------------------------------------------------
Less distributions                                       
Dividends (from net investment income)                      --       (.49)     (.40)     (.25)     (.44)    (.60)    (.30)    (.10)
Dividends (in excess of net investment income)              --       --        --        --        (.01)    --       --       --   
- -----------------------------------------------------------------------------------------------------------------------------------
Total distributions                                         --       (.49)     (.40)     (.25)     (.45)    (.60)    (.30)    (.10)
- -----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                           $ 11.64   $11.12   $ 10.83   $ 10.04   $  9.97   $10.03   $ 9.72   $ 9.93 
===================================================================================================================================
Total return**                                            16.40%    7.20%    12.40%     3.21%     3.98%    9.54%    0.92%    0.30%
===================================================================================================================================
Net assets, end of period (in thousands)                 $   420   $1,153   $   783   $13,664   $11,901   $3,187   $2,902   $  502 
Average net assets for the period (in thousands)             234      976       459    12,025     7,168    2,727    1,774      492 
Ratio of gross expenses to average net assets*(6)          1.25%    1.01%     1.01%     0.65%     0.66%    0.70%      N/A      N/A 
Ratio of net expenses to average net assets*(6)            1.25%    1.00%     1.00%     0.65%     0.65%    0.65%    0.65%    0.65%
Ratio of net investment income to average net assets*      1.69%    8.41%     5.74%     5.92%     5.44%    6.02%    5.00%    3.57%
Portfolio turnover rate*                                     51%     440%      301%      166%      416%     417%     256%      91%
Average commission per share                             $0.0449      N/A       N/A       N/A       N/A      N/A      N/A      N/A  
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
<TABLE>
<CAPTION>
FINANCIAL HIGHLIGHTS - INSTITUTIONAL SHARES (Continued)
                                                       
For a share outstanding during the                              Janus Aspen 
six months or period ended June 30, 1997 (unaudited)            Money Market
and the fiscal year or period ended December 31                  Portfolio 
- ----------------------------------------------------------------------------------
                                                           1997     1996  1995(5)
- ----------------------------------------------------------------------------------
<S>                                                      <C>      <C>      <C>    
Net asset value, beginning of period                     $ 1.00   $ 1.00   $ 1.00 
- ----------------------------------------------------------------------------------
Income from investment operations                                                 
Net investment income/(loss)                                .02      .05      .04 
Net gains or (losses) on securities                                               
(both realized and unrealized)                             --       --       --   
- ----------------------------------------------------------------------------------
Total from investment operations                            .02      .05      .04 
- ----------------------------------------------------------------------------------
Less distributions                                                                
Dividends (from net investment income)                     (.02)    (.05)    (.04)
Dividends (in excess of net investment income)             --       --       --   
- ----------------------------------------------------------------------------------
Total distributions                                        (.02)    (.05)    (.04)
- ----------------------------------------------------------------------------------
Net asset value, end of period                           $ 1.00   $ 1.00   $ 1.00 
==================================================================================
Total return**                                            2.47%    5.05%    3.63%
==================================================================================
Net assets, end of period (in thousands)                 $6,573   $6,106   $1,735 
Average net assets for the period (in thousands)          6,852    3,715    1,543 
Ratio of gross expenses to average net assets*(6)         0.50%    0.50%    0.50%
Ratio of net expenses to average net assets*(6)           0.50%    0.50%    0.50%
Ratio of net investment income to average net assets*     4.98%    4.93%    5.30%
Portfolio turnover rate*                                    N/A      N/A      N/A 
Average commission per share                                N/A      N/A      N/A 
- ----------------------------------------------------------------------------------                                       
</TABLE>
* Annualized for periods of less than one full year.
**Total return not annualized for periods of less than 1 full year.
(1) Period September 13, 1993 (inception) to December 31, 1993
(2) Period May 1, 1997 (inception) to June 30, 1997
(3) Period May 2, 1994 (inception) to December 31, 1994
(4) Period May 1, 1996 (inception) to December 31, 1996
(5) Period May 1, 1995 (inception) to December 31, 1995
(6) See footnote #5 in notes to financial statements.

          JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 44 AND 45
<PAGE>
<TABLE>
<CAPTION>
FINANCIAL HIGHLIGHTS - RETIREMENT SHARES
                                                                     Janus Aspen   Janus Aspen  Janus Aspen  Janus Aspen
                                                       Janus Aspen    Aggressive     Capital   International  Worldwide  Janus Aspen
For a share outstanding during the period                 Growth        Growth    Appreciation     Growth       Growth     Balanced
May 1, 1997 (inception) to June 30, 1997 (unaudited)    Portfolio     Portfolio     Portfolio    Portfolio    Portfolio    Portfolio
- ------------------------------------------------------------------------------------------------------------------------------------
                                                            1997          1997          1997         1997         1997         1997
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                    <C>           <C>           <C>          <C>          <C>          <C>      
Net asset value, beginning of period                   $   16.18     $   16.09     $   10.00    $   16.80    $   20.72    $   15.39
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations                                                                                        
Net investment income/(loss)                                 .03          (.01)          .05          .06          .06          .08
Net gains or (losses) on securities                                                                                      
(both realized and unrealized)                              1.35          2.62          1.69         1.72         2.32         1.12
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                            1.38          2.61          1.74         1.78         2.38         1.20
- ------------------------------------------------------------------------------------------------------------------------------------
Less distributions                                                                                                       
Dividends (from net investment income)                      (.10)         --            --           (.09)        (.14)        (.20)
Dividends (in excess of net investment income)              (.37)         --            --           (.04)        (.16)        (.18)
- ------------------------------------------------------------------------------------------------------------------------------------
Total distributions                                         (.47)         --            --           (.13)        (.30)        (.38)
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                         $   17.09     $   18.70     $   11.74    $   18.45    $   22.80    $   16.21
====================================================================================================================================
Total return**                                             8.52%        16.28%        17.40%       10.59%       11.48%        7.78%
====================================================================================================================================
Net assets, end of period (in thousands)               $      11     $      12     $      12    $      11    $      11    $      11
Average net assets for the period (in thousands)              10            10            10           10           10           10
Ratio of gross expenses to average net assets*(1)          1.24%         1.46%         1.75%        1.52%        1.38%        1.39%
Ratio of net expenses to average net assets*               1.24%         1.46%         1.75%        1.52%        1.38%        1.39%
Ratio of net investment income to average net assets*      1.06%        (0.42%)        2.79%        1.70%        1.63%        3.11%
Portfolio turnover rate*                                    133%          108%          273%          49%          67%         108%
Average commission per share                           $  0.0472     $  0.0364     $  0.0462    $  0.0231    $  0.0321    $  0.0477
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
<TABLE>
<CAPTION>
FINANCIAL HIGHLIGHTS - RETIREMENT SHARES (Continued)
                                                           Janus Aspen      Janus Aspen                     Janus Aspen  Janus Aspen
                                                              Equity          Flexible      Janus Aspen      Short-Term     Money
For a share outstanding during the period                     Income           Income        High-Yield         Bond        Market
May 1, 1997 (inception) to June 30, 1997 (unaudited)        Portfolio        Portfolio        Portfolio      Portfolio     Portfolio
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                1997             1997             1997           1997          1997
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                           <C>              <C>              <C>            <C>            <C>  
Net asset value, beginning of period                          $10.00           $11.41           $11.19         $10.14         $1.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations
Net investment income/(loss)                                     .02              .13              .22            .10           .01
Net gains or (losses) on securities
(both realized and unrealized)                                  1.61              .19              .19            .04            --
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                                1.63              .32              .41            .14           .01
- ------------------------------------------------------------------------------------------------------------------------------------
Less distributions
Dividends (from net investment income)                            --             (.34)            (.49)          (.25)         (.01)
Dividends (in excess of net investment income)                    --             (.11)              --             --            --
- ------------------------------------------------------------------------------------------------------------------------------------
Total distributions                                               --             (.45)            (.49)          (.25)         (.01)
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $11.63           $11.28           $11.11         $10.03         $1.00
====================================================================================================================================
Total return**                                                 16.30%            2.80%            3.71%          1.38%         0.73%
====================================================================================================================================
Net assets, end of period (in thousands)                         $12              $10              $10            $10           $10
Average net assets for the period (in thousands)                  10               10               10             10            10
Ratio of gross expenses to average net assets*(1)               1.75%            1.24%            1.52%          1.15%         1.31%
Ratio of net expenses to average net assets*                    1.75%            1.24%            1.50%          1.15%         1.31%
Ratio of net investment income to average net assets*           1.41%            2.22%            8.06%          5.51%         4.98%
Portfolio turnover rate*                                          51%              95%             440%           166%          N/A
Average commission per share                                 $0.0449              N/A              N/A            N/A           N/A
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
* Annualized for periods of less than one full year.
**Total return not annualized for periods of less than 1 full year.
(1) See footnote #5 in notes to financial statements.

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 46
<PAGE>

                   NOTES TO FINANCIAL STATEMENTS (unaudited)

1. Organization and Significant Accounting Policies

Janus Aspen Series (the  "Trust") was  organized as a Delaware  Trust on May 20,
1993 and is registered under the Investment Company Act of 1940 (the "1940 Act")
as a no-load,  open-end management  investment company.  The Trust offers eleven
portfolios  or  series  of  shares  with  differing  investment  objectives  and
policies.  Seven portfolios invest primarily in equity  securities:  Janus Aspen
Growth Portfolio,  Janus Aspen Aggressive Growth Portfolio,  Janus Aspen Capital
Appreciation Portfolio,  Janus Aspen International Growth Portfolio, Janus Aspen
Worldwide Growth Portfolio, Janus Aspen Equity Income Portfolio, and Janus Aspen
Balanced  Portfolio.  Three  Portfolios  invest  primarily  in income  producing
securities:  Janus Aspen  Flexible  Income  Portfolio,  Janus  Aspen  High-Yield
Portfolio  and  Janus  Aspen  Short-Term  Bond  Portfolio.  Janus  Money  Market
Portfolio  invests in  short-term  money market  securities.  Each  Portfolio is
diversified  as defined in the 1940 Act,  with the  exception of the  Aggressive
Growth Portfolio and Capital Appreciation Portfolio which are non-diversified.

Institutional  Shares of the Trust are issued and  redeemed  only in  connection
with  investment in and payments under variable  annuity  contracts and variable
life insurance contracts (collectively "variable insurance contracts"),  as well
as certain qualified retirement plans. Retirement Shares of the Trust are issued
and redeemed only in connection with certain qualified retirement plans.

Organizational  costs for the Portfolio were borne by Janus Capital  Corporation
(the Trust's  investment  advisor).  Effective May 1, 1997, the Trust issued two
new series of shares, the Janus Aspen Capital  Appreciation  Portfolio and Janus
Aspen Equity Income  Portfolio.  Janus Capital  invested $10,000 of initial seed
capital, in each portfolio.

The following  accounting policies have been consistently  followed by the Trust
and are in  conformity  with  accounting  principles  generally  accepted in the
investment company industry.

Investment Valuation

Securities are valued at the closing price for securities  traded on a principal
securities  exchange  (U.S.  or  foreign)  and on the  NASDAQ  National  Market.
Securities traded on over-the-counter markets and listed securities for which no
sales are  reported  are valued at  the  latest  bid price (or yield  equivalent
thereof)  obtained from one or more dealers making a market for such  securities
or by a  pricing  service  approved  by  the  Trustees.  Short-term  investments
maturing  within 60 days and all money  market  securities  in the Money  Market
Portfolio are valued at amortized cost, which approximates market value. Foreign
securities  are converted to U.S.  dollars using  exchange rates at the close of
the New York Stock Exchange.  When market quotations are not readily  available,
securities are valued at fair value as determined in good faith under procedures
established by the Trustees.

Investment Transactions and Investment Income

Investment  transactions  are  accounted  for as of the date  purchased or sold.
Dividend  income is recorded on the  ex-dividend  date.  Certain  dividends from
foreign  securities  will be  recorded  as soon as the Trust is  informed of the
dividend if such  information is obtained  subsequent to the  ex-dividend  date.
Interest  income is recorded on the accrual basis and includes  amortization  of
discounts and premiums.  Gains and losses are determined on the identified  cost
basis, which is the same basis used for federal income tax purposes.

Forward Currency Transactions and Futures Contracts

The  Portfolios  enter into forward  currency  contracts in order to hedge their
exposure  to  changes  in  foreign  currency  exchange  rates on  their  foreign
portfolio  holdings  and to lock in the U.S.  dollar cost of firm  purchase  and
sales commitments denominated in foreign currencies. A forward currency contract
is a  commitment  to purchase  or sell a foreign  currency at a future date at a
negotiated  forward rate. The gain or loss arising from the  difference  between
the U.S.  dollar  cost of the  original  contract  and the value of the  foreign
currency in U.S.  dollars upon closing such contract is included in net realized
gain or loss on foreign currency  transactions.  Forward currency contracts held
by the Portfolios are fully collateralized by other securities which are denoted
in  the  accompanying  schedule  of  investments.  Such  collateral  is  in  the
possession of the  Portfolio's  custodian.  The collateral is evaluated daily to
ensure its  market  value  equals or exceeds  the  current  market  value of the
corresponding forward currency contracts.

Currency gain and loss is also calculated on payables and  receivables  that are
denominated in foreign  currencies.  The payables and  receivables are generally
related to security transactions and income.

Futures  contracts  are  marked to  market  daily  and the  variation  margin is
recorded as an unrealized  gain or loss.  When a contract is closed,  a realized
gain or loss is recorded equal to the difference between the opening and closing
value of the contract.  Generally, open forward and futures contracts are marked
to market (i.e.,  treated as realized and subject to  distribution)  for federal
income tax purposes at fiscal year-end.

Foreign denominated assets and forward currency contracts may involve more risks
than domestic  transactions,  including:  currency risk,  political and economic
risk, regulatory risk, and

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 47
<PAGE>

               NOTES TO FINANCIAL STATEMENTS (unaudited) (CON'TD)

market risk.  Risks may arise from the potential  inability of a counterparty to
meet the terms of a contract  and from  unanticipated  movements in the value of
foreign currencies relative to the U.S. dollar.

The  Portfolios  may enter into  futures  contracts  and options on  securities,
financial indices and foreign currencies;  forward contracts;  and interest rate
swaps and swap-related  products.  The Portfolios  intend to use such derivative
instruments  primarily to hedge or protect from adverse  movements in securities
prices,  currency  rates or interest  rates.  The use of futures  contracts  and
options  may  involve  risks  such as the  possibility  of  illiquid  markets or
imperfect  correlation  between the value of the  contracts  and the  underlying
securities, or that the counterparty will fail to perform its obligations.

Additional Investment Risk

A portion of the Flexible  Income and  High-Yield  Portfolios may be invested in
lower rated debt  securities that have a higher risk of default or loss of value
due to changes in the economy or in their respective industry.

Estimates

The preparation of financial  statements in conformity  with generally  accepted
accounting principles requires management to make estimates and assumptions that
affect  the  reported  amount  of  assets  and  liabilities  and  disclosure  of
contingent  assets and  liabilities at the date of the financial  statements and
the reported amounts of income and expenses during the reporting period.
Actual results could differ from those estimates.

Dividend Distributions and Expenses

Each   Portfolio,   except  the  Money  Market   Portfolio,   makes   semiannual
distributions  of  substantially  all of its  investment  income  and an  annual
distribution  of its net  realized  capital  gains,  if any.  The  Money  Market
Portfolio  makes daily  distributions  of its income.  All dividends and capital
gains  distributions  from a Portfolio  will be  automatically  reinvested  into
additional shares of that Portfolio.

Each Portfolio bears expenses  incurred  specifically on its behalf as well as a
portion of general  expenses based  generally on the relative net assets of each
Portfolio.

Federal Income Taxes

No  provision  for  income  taxes  is  included  in the  accompanying  financial
statements as the Portfolios  intend to distribute to  shareholders  all taxable
investment  income and  realized  gains and  otherwise  comply with the Internal
Revenue Code applicable to regulated investment companies.

2. Investment Advisory Agreement and Other Transactions with Affiliates

Investment  advisory fees for each of the five equity  Portfolios are payable to
Janus  Capital  based upon  annual  rates of .75% of the first  $300  million of
average net assets, .70% of the next $200 million of average net assets and .65%
of the average net assets in excess of $500 million.  However, Janus Capital has
voluntarily agreed to reduce each equity Portfolio's  advisory fee to the extent
that such fee exceeds the effective rate of the Janus retail fund  corresponding
to such  Portfolio.  The  effective  rate is the advisory fee  calculated by the
corresponding retail fund as of the last day of each calendar quarter (expressed
as an annual rate). Janus Aspen Growth Portfolio,  Janus Aspen Aggressive Growth
Portfolio, Janus Aspen Capital Appreciation Portfolio, Janus Aspen International
Growth Portfolio,  Janus Aspen Worldwide Growth Portfolio,  Janus Aspen Balanced
Portfolio and Janus Aspen Equity Income  Portfolio  advisory fees are reduced to
the effective rates of Janus Fund,  Janus  Enterprise  Fund, Janus Olympus Fund,
Janus Overseas Fund, Janus Worldwide Fund, Janus Balanced Fund, and Janus Equity
Income Fund  respectively.  The effective rate for each Portfolio for the period
ended  June  30,  1997 was  .65%,  .73%,  .75%,  .68%,  .66%,  .78%,  and  .94%,
respectively.  The  Flexible  Income and  Short-Term  Bond  Portfolios  are each
subject to advisory  fees  payable to Janus  Capital  based upon annual rates of
 .65% of the first $300  million of average  net assets  plus .55% of average net
assets in excess of $300 million.  The High-Yield  Portfolio's advisory fee rate
is payable at rates of .75% of the first $300 million of average net assets plus
 .65% of  average  net  assets  in  excess  of $300  million.  The  Money  Market
Portfolio's advisory fee rate is .25% of average net assets.

Janus  Capital  has also  agreed to reduce  its fee to the  extent  that  normal
operating  expenses  exceed  1.25% of the  average  net  assets  of the  Capital
Appreciation,  International  Growth,  and Equity Income  Portfolios,  1% of the
average net assets of the Flexible Income and High-Yield Portfolios, .65% of the
average net assets of the Short-Term  Bond Portfolio and .50% of the average net
assets of the Money Market Portfolio for a fiscal year.

Officers and certain trustees of the Trust are also officers and/or directors of
Janus Capital; however, they receive no compensation from the Trust.

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 48
<PAGE>

               NOTES TO FINANCIAL STATEMENTS (unaudited) (CON'TD)

DST Systems Inc. (DST), an affiliate of Janus Capital through a degree of common
ownership,  provides accounting systems to the Portfolios. DST Securities, Inc.,
a wholly  owned  subsidiary  of DST,  provides  brokerage  services  on  certain
portfolio transactions.  Brokerage commissions paid to DST Securities Inc. serve
to reduce fees and expenses.  Brokerage  commissions paid, fees reduced, and the
net fees paid to DST for the period ended June 30, 1997 are noted below:

<TABLE>
<CAPTION>
                                            DST Securities, Inc.   Fund Expense    DST Systems
                                             Commissions Paid*      Reduction*        Costs
- ----------------------------------------------------------------------------------------------
<S>                                                <C>              <C>              <C>    
Janus Aspen Growth Portfolio                       $ 2,118          $ 1,588          $11,300
- ----------------------------------------------------------------------------------------------
Janus Aspen Aggressive Growth Portfolio              4,876            3,657            6,670
- ----------------------------------------------------------------------------------------------
Janus Aspen Capital Appreciation Portfolio            --               --               --
- ----------------------------------------------------------------------------------------------
Janus Aspen International Growth Portfolio            --               --              5,554
- ----------------------------------------------------------------------------------------------
Janus Aspen Worldwide Growth Portfolio               2,909            2,182           11,338
- ----------------------------------------------------------------------------------------------
Janus Aspen Balanced Portfolio                         245              184            6,268
- ----------------------------------------------------------------------------------------------
Janus Aspen Equity Income Portfolio                   --               --               --
- ----------------------------------------------------------------------------------------------
Janus Aspen Flexible Income Portfolio                 --               --              5,387
- ----------------------------------------------------------------------------------------------
Janus Aspen High-Yield Portfolio                      --               --              4,943
- ----------------------------------------------------------------------------------------------
Janus Aspen Short-Term Bond Portfolio                 --               --              5,164
- ----------------------------------------------------------------------------------------------
Janus Aspen Money Market Portfolio                    --               --              5,080
- ----------------------------------------------------------------------------------------------
</TABLE>
* The difference  between  commissions paid to DST Securities, Inc. and expenses
  reduced constituted commissions paid to an unaffiliated clearing broker.

3. Federal Income Tax

The  Portfolios  have  elected  to treat  gains and  losses on  forward  foreign
currency contracts as capital gains and losses. Other foreign currency gains and
losses on debt instruments are treated as ordinary income for federal income tax
purposes  pursuant to Section 988 of the Internal  Revenue Code. The net capital
loss  carryover  noted below,  as of December  31, 1996,  is available to offset
future   realized   capital  gains  and  thereby  reduce  future  taxable  gains
distributions  until December 31, 2004. In 1996, Janus Aspen  Aggressive  Growth
Portfolio  incurred  "post - October"  losses of  $670,425  in the  period  from
November 1 through  December  31,  1996.  These  losses will be deferred for tax
purposes and recognized in 1997.

The aggregate cost of investments and the composition of unrealized appreciation
and  depreciation  of investments for federal income tax purposes as of June 30,
1997 are also noted below.

<TABLE>
<CAPTION>
                                              at 12/31/96                             at June 30, 1997
                                            ----------------  -----------------------------------------------------------------
                                            Net Capital Loss    Federal Tax     Unrealized       Unrealized   Net Appreciation/
                                               Carryovers          Cost        Appreciation    (Depreciation)   (Depreciation)
- -------------------------------------------------------------------------------------------------------------------------------
<S>                                          <C>              <C>              <C>             <C>              <C>
Janus Aspen Growth Portfolio                                  $ 426,562,562    $  63,239,987   ($  3,881,371)   $  59,358,616
- -------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Aggressive Growth Portfolio      ($ 10,344,419)     337,280,407       93,491,720      (2,372,626)      91,119,094
- -------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Capital Appreciation Portfolio                          893,412           47,469          (2,537)          44,932
- -------------------------------------------------------------------------------------------------------------------------------
Janus Aspen International Growth Portfolio                       90,465,623       12,959,475      (1,652,738)      11,306,737
- -------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Worldwide Growth Portfolio                          958,610,039      205,211,683     (15,462,760)     189,748,923
- -------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Balanced Portfolio                                  157,218,701       13,136,706        (960,505)      12,176,201
- -------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Equity Income Portfolio                                 422,283           44,143          (4,162)          39,981
- -------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Flexible Income Portfolio                            34,236,707          918,606        (101,444)         817,162
- -------------------------------------------------------------------------------------------------------------------------------
Janus Aspen High-Yield Portfolio                                  1,047,654           29,188          (2,518)          26,670
- -------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Short-Term Bond Portfolio                            13,507,535           28,515         (25,441)           3,074
- -------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Money Market Portfolio                                6,176,349             --              --               --
- -------------------------------------------------------------------------------------------------------------------------------
</TABLE>

4. Expenses

The Portfolios' expenses may be reduced through expense reduction  arrangements.
Those arrangements include the use of broker commissions paid to DST Securities,
Inc.  and  uninvested  cash  balances  earning  interest  with  the  Portfolios'
custodian.  The Statements of Operations  reflect the total expenses  before any
offset, the amount of the offset and the net expenses. The expense ratios listed
in the Financial  Highlights reflect expenses prior to any expense offset (gross
expense ratio) and after expense offsets (net expense ratio).

Janus  Aspen  Series  Retirement  Shares  incur a pro rata  share  of  operating
expenses. In addition the Retirement Shares pay up to .25% of average net assets
in  distribution  expense  and up to .25% of average  net assets in  Participant
Administration Expenses.

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 49
<PAGE>

             NOTES TO FINANCIAL STATEMENTS (unaudited) (CON'TD)

5. Expense Ratios

Listed below are the expense ratios for the various  Portfolios before waiver of
certain fees and/or  voluntary  reduction of advisor's fee to the effective rate
of the corresponding Janus Retail Fund.

<TABLE>
<CAPTION>
                                                                           Institutional Shares                    Retirement Shares
                                                         1997         1996         1995         1994         1993          1997
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                     <C>          <C>          <C>          <C>          <C>           <C>  
Janus Aspen Growth Portfolio                            0.81%        0.83%        0.98%        1.23%        2.16%         1.35%
- ------------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Aggressive Growth Portfolio                 0.79%        0.83%        0.93%        1.14%        5.79%         1.48%
- ------------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Capital Appreciation Portfolio              3.69%         N/A          N/A          N/A          N/A          4.19%
- ------------------------------------------------------------------------------------------------------------------------------------
Janus Aspen International Growth Portfolio              1.21%        2.21%        3.57%        4.67%         N/A          1.72%
- ------------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Worldwide Growth Portfolio                  0.79%        0.91%        1.09%        1.49%        2.71%         1.43%
- ------------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Balanced Portfolio                          0.89%        1.07%        1.55%        1.74%        7.92%         1.42%
- ------------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Equity Income Portfolio                     7.94%         N/A          N/A          N/A          N/A          8.44%
- ------------------------------------------------------------------------------------------------------------------------------------
Janus Aspen Flexible Income Portfolio                    N/A          N/A         1.07%        1.35%        5.27%         1.24%
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Janus Aspen High-Yield Portfolio                        4.69%        6.29%         N/A          N/A          N/A          5.20%
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Janus Aspen Short-Term Bond Portfolio                   0.90%        0.84%        1.37%        1.40%        5.33%         1.54%
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Janus Aspen Money Market Portfolio                      0.55%        0.78%        1.07%         N/A          N/A          1.31%
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</TABLE>

              JANUS ASPEN SERIES JUNE 30, 1997 SEMIANNUAL REPORT 50



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