JANUS ASPEN SERIES
N-30D, 1999-02-26
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Janus | Aspen Series
1998 Annual Report

     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 
     Janus Aspen Equity Income Portfolio 
     Janus Aspen Growth and Income Portfolio 
     Janus Aspen Flexible Income Portfolio 
     Janus Aspen High-Yield Portfolio 
     Janus Aspen Money Market Portfolio

[LOGO]  JANUS

<PAGE>

Table | of Contents

Janus Aspen Series
     Portfolio Managers' Commentaries and Schedules of Investments
          Growth Portfolio .....................................    14
          Aggressive Growth Portfolio ..........................    17
          Capital Appreciation Portfolio .......................    20
          International Growth Portfolio .......................    23
          Worldwide Growth Portfolio ...........................    28
          Balanced Portfolio ...................................    34
          Equity Income Portfolio ..............................    38
          Growth and Income Portfolio ..........................    41
          Flexible Income Portfolio ............................    45
          High-Yield Portfolio .................................    50
          Money Market Portfolio ...............................    54
     Statements of Operations ..................................    56
     Statements of Assets and Liabilities ......................    58
     Statements of Changes in Net Assets .......................    60
     Financial Highlights ......................................    63
     Notes to the Schedules of Investments .....................    72
     Notes to Financial Statements .............................    73
     Explanation of Charts, Tables
          and Financial Statements .............................    78
     Report of Independent Accountants .........................    81

                                                                   [LOGO]  JANUS

<PAGE>

Janus | Aspen Growth Portfolio

[PHOTO]
James P. Craig
portfolio manager

For the fiscal  year ended  December  31,  1998,  Janus Aspen  Growth  Portfolio
outpaced the S&P 500 Index,  returning 35.66% for its  Institutional  Shares and
34.99% for its  Retirement  Shares.  By  comparison,  the index posted a gain of
28.74%.(1)

Low interest rates,  benign inflation and steady  corporate  earnings helped the
U.S.  stock  market  get off to a strong  start in 1998.  However,  in the third
quarter,  stocks dropped precipitously following an outbreak of economic turmoil
that started in Japan and spread to Russia, Brazil and other emerging markets.

In the U.S., the Federal  Reserve  responded to this  turbulence by making three
consecutive  interest rate cuts. This injected  liquidity into the stock market,
which  bolstered  consumer  confidence  and enabled the economy to power through
recession fears. In fact,  consumer  confidence was so solid that even President
Clinton's  impeachment  and other  signs of  political  instability  in the U.S.
failed to shake the markets.

The economic situation also improved from a global perspective. Japan, which was
considered "ground zero" economically speaking, began to take small but positive
steps  toward  economic  reform.  Meanwhile,  the outlook for Brazil  brightened
thanks to its financial bailout by the International Monetary Fund.

During the period,  much of the optimism in the U.S.  stock market was fueled by
economic  changes  giving  rise to new  industries  and  dominant  players.  For
example,  an  explosion in Internet  growth  helped  drive  selected  technology
stocks,  including  Cisco Systems and Microsoft.  Cisco gained a remarkable 150%
for the year, contributing substantially to the Portfolio's overall performance.
Already the biggest hardware supplier to Internet and networking companies, this
company is also making serious inroads in the area of voice-data transmission, a
new market in which Cisco is quickly becoming the leader.

Despite the U.S.  government's  anti-trust case against Microsoft,  it remains a
leader in the software  industry.  We believe technology changes too quickly for
Microsoft  or any other  technology  company to  establish  a  monopoly  in this
industry.  Furthermore,  we are impressed with the rapid pace at which Microsoft
continues to develop and introduce new products; therefore, our outlook for this
stock is positive.

Several of our cable positions also ended the period with extraordinary results,
including  Tele-Communications,  Inc. (TCI), Time Warner, Inc. and Comcast Corp.
After a flat first half,  these stocks  rallied on news of TCI's  acquisition by
AT&T.  This merger further  validates our theory that digital cable,  telephony,
high-speed  Internet access and other new  value-added  services cable companies
are currently rolling out could generate a free cash flow boom over the next few
years.

Breakthroughs in drug therapies helped push several of our pharmaceutical stocks
forward. Pfizer gained on news of a new arthritis drug known as Celebrex,  which
it will co-market with Monsanto,  while  Warner-Lambert  benefited from optimism
surrounding  Lipitor, a  cholesterol-lowering  drug. Although we remain positive
about  these  two  companies'  solid  business  fundamentals,  rhetoric  out  of
Washington  about  increasing drug prices has us keeping an especially close eye
on this industry.

Selected  financial  services  companies also contributed to our strong results.
The increasing  growth of Charles  Schwab's online trading  business leads us to
believe it is the epitome of all good things for Internet consumers. Schwab also
continues to flex its muscles in the banking business by providing  unparalleled
asset management  services in terms of quality and price.  These services enable
customers to consolidate  everything  from banking to paying bills to investing,
all through one account.

Unfortunately,  not all of our financial services positions impressed us as much
as Charles  Schwab.  Uncertain  prospects in asset quality  created by financial
discord  in  Russia  and  Brazil  resulted  in  significant   deterioration  and
profitability  at  BankAmerica,  UBS and  Morgan  Stanley  Dean  Witter  and Co.
Consequently, we liquidated these positions at a loss.

Another  disappointment  was  Parametric  Technology,  a software  developer  in
computer-aided  design and  manufacturing.  Parametric's  earnings suffered as a
result of management  losing sight of its core business during the  introduction
of a new product. Therefore, this position was also liquidated at a loss.

While I believe  near-term  economic growth in the U.S. will remain moderate,  I
anticipate  slower earnings growth among large  multinational  companies.  Going
forward,  the  combination of a slowing global economy and low inflation  should
keep long-term  interest rates low. In this environment,  talented stock pickers
thrive,  and I am  confident  that in the coming year we'll  continue to uncover
several more dynamic earnings stories.

In closing,  I'd like to thank you for investing in Janus Aspen Growth Portfolio
and assure you of our dedication in pursuing strong results for 1999.

Portfolio Asset Mix                   December 31, 1998        December 31, 1997
- --------------------------------------------------------------------------------
Equities                                     93.2%                    91.3%
  Foreign                                     4.9%                     9.4%
  Europe                                      3.6%                     9.4%
Top 10 Equities                              36.5%                    27.1%
Number of Stocks                                70                       80
Cash & Cash Equivalents                       6.8%                     8.7%
- --------------------------------------------------------------------------------
(1) All returns include reinvested dividends.

2  Janus Aspen Series / December 31, 1998
<PAGE>

Average Annual Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 9/13/93)
  1 Year                                                     35.66%
  5 Year                                                     21.41%
  From Inception                                             20.91%
- --------------------------------------------------------------------------------
S&P 500 Index
  1 Year                                                     28.74%
  5 Year                                                     24.08%
  From Inception Date of Institutional Shares                23.06%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/97)
  1 Year                                                     34.99%
  5 Year (unaudited)                                         20.71%
  From Portfolio Inception (unaudited)                       20.01%
- --------------------------------------------------------------------------------
Returns shown for  Retirement  Shares for periods  prior to their  inception are
derived from the historical  performance of  Institutional  Shares,  adjusted to
reflect the higher operating expenses of Retirement Shares.

Note: Performance of the Retirement  Shares is lower from the performance  shown
      on this graph for the  Institutional  Shares,  based upon the higher  fees
      paid by shareholders investing in this class.

Performance Overview(1)

[GRAPHIC OMITTED]

A graphic comparison of the change in value of a hypothetical $10,000 investment
in Janus Aspen Growth  Portfolio -  Institutional  Shares and the S&P 500 Index.
Janus Aspen Growth  Portfolio - Institutional  Shares is represented by a shaded
area of blue.  The S&P 500 Index is  represented  by a solid black line. The "y"
axis reflects the value of the investment. The "x" axis reflects the computation
periods from inception, September 13, 1993, through December 31, 1998. The upper
right quadrant reflects the ending value of the hypothetical investment in Janus
Aspen Growth  Portfolio - Institutional  Shares ($27,315) as compared to the S&P
500 Index ($29,978).

Average Annual Total Return
for the periods ended December 31, 1998
One Year, 35.66%
Five Year, 21.41%
Since 9/13/93,* 20.91%

Janus Aspen Growth Portfolio
- - Institutional Shares - $27,315

S&P 500 Index - $29,978

*The Portfolio's inception date.
Source - Lipper Analytical Services, Inc. 1998.

(1)  All returns reflect reinvested  dividends.  The Portfolio's  securities may
     differ significantly from the securities in the Index. Index returns do not
     include  taxes or  dividends  and interest  payments or operating  expenses
     necessary to maintain a portfolio  consisting of the same  securities  that
     are in the Index.  These returns do not reflect the charges and expenses of
     any particular  insurance product or qualified plan.  Investment return and
     principal value will fluctuate so that shares, when redeemed,  may be worth
     more or less than their  original cost.  The adviser  voluntarily  waives a
     portion of the Portfolio's  expenses.  Without such waiver, the Portfolio's
     total returns for each class would have been lower.  Past  performance does
     not guarantee future results.

SCHEDULE OF INVESTMENTS

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Common Stock - 93.2%
Advertising Sales - 0.4%
     138,040       Outdoor Systems, Inc.* .................     $      4,141,200

Agricultural Biotechnology - 0.4%
      96,970       Monsanto Co. ...........................            4,606,075

Automotive - Truck Parts and Equipment - 1.4%
     253,275       Federal-Mogul Corp. ....................           15,069,862

Broadcast Services and Programming - 1.0%
     231,400       Tele-Communications Liberty Media
                   Group, Inc. - Class A* .................           10,658,862

Cable Television - 10.0%
     251,640       Adelphia Communications Corp. - Class A*           11,512,530
     686,325       Comcast Corp. - Special Class A ........           40,278,698
     359,990       Cox Communications, Inc. - Class A* ....           24,884,309
     464,040       MediaOne Group, Inc.* ..................           21,809,880
     208,660       Tele-Communications, Inc. - Class A* ...           11,541,506

                                                                     110,026,923

Chemicals - Diversified - 0.2%
      80,630       Solutia, Inc. ..........................            1,804,096

Chemicals - Specialty - 0.2%
     104,610       Cytec Industries, Inc.* ................            2,222,963

Circuits - 4.4%
     290,700       Linear Technology Corp. ................           26,035,819
     516,700       Maxim Integrated Products, Inc.* .......           22,573,331

                                                                      48,609,150

Commercial Banks - 1.6%
      79,045       Firstar Corp. ..........................     $      7,370,946
      19,475       M & T Bank Corp. .......................           10,106,308

                                                                      17,477,254

Computer Software - 6.2%
     396,850       Microsoft Corp.* .......................           55,038,134
      50,000       Oracle Corp.* ..........................            2,156,250
     240,000       Wind River Systems, Inc.* ..............           11,280,000

                                                                      68,474,384

Computers - Integrated Systems - 1.0%
     364,235       Cadence Design Systems, Inc.* ..........           10,835,991

Computers - Memory Devices - 2.5%
     266,225       EMC Corp.* .............................           22,629,125
      81,670       VERITAS Software Corp.* ................            4,895,096

                                                                      27,524,221

Computers - Micro - 4.7%
     125,000       Dell Computer Corp.* ...................            9,148,438
     126,210       IBM Corp. ..............................           23,317,298
     226,090       Sun Microsystems, Inc.* ................           19,358,956

                                                                      51,824,692

Cruise Lines - 0.7%
     154,050       Carnival Corp. .........................            7,394,400

Data Processing and Management - 0.7%
     100,000       Automatic Data Processing, Inc. ........            8,018,750

Diversified Operations - 4.7%
     111,100       General Electric Co. ...................           11,339,144
     544,959       Tyco International, Ltd. ...............           41,110,345

                                                                      52,449,489

See Notes to Schedules of Investments.

                                       Janus Aspen Series / December 31, 1998  3
<PAGE>

Janus | Aspen Growth Portfolio

SCHEDULE OF INVESTMENTS (continued)

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Drug Delivery Systems - 0.7%
     142,365       ALZA Corp.* ............................     $      7,438,571

Electronic Components - Semiconductors - 1.6%
     199,950       Texas Instruments, Inc. ................           17,108,222

Electronic Safety Devices - 0.4%
     141,350       Pittway Corp. - Class A ................            4,673,384

Finance - Credit Card - 0.7%
      80,000       American Express Co. ...................            8,180,000

Finance - Investment Bankers/Brokers - 2.8%
     543,805       Charles Schwab Corp. ...................           30,555,043

Finance - Mortgage Loan Banker - 1.2%
      64,250       Fannie Mae .............................            4,754,500
     129,975       Freddie Mac ............................            8,375,264

                                                                      13,129,764

Finance - Other Services - 1.3%
     200,000       Newcourt Credit Group, Inc. ............            6,966,409
     204,709       Newcourt Credit Group, Inc. ............
                     - New York Shares ....................            7,152,021

                                                                      14,118,430

Food - Wholesale - 0.4%
      98,725       U.S. Foodservice* ......................            4,837,525

Human Resources - 0.9%
     223,320       Robert Half International, Inc.* .......            9,979,613

Instruments - Scientific - 0.9%
     268,450       Dionex Corp.* ..........................            9,831,981

Internet Software - 1.7%
     130,000       America Online, Inc.* ..................           18,817,500

Medical - Drugs - 7.5%
      64,810       Merck & Co., Inc. ......................            9,571,627
     296,935       Pfizer, Inc. ...........................           37,246,784
     164,000       Pharmacia & Upjohn, Inc. ...............            9,286,500
     214,350       Schering-Plough Corp. ..................           11,842,838
     204,600       Warner-Lambert Co. .....................           15,383,363

                                                                      83,331,112

Medical - Wholesale Drug Distributors - 1.3%
     175,745       McKesson Corp. .........................           13,894,839

Medical Information Systems - 1.4%
     549,000       HBO & Co. ..............................           15,749,437

Medical Instruments - 0.6%
      90,000       Medtronic, Inc. ........................            6,682,500

Money Center Banks - 3.0%
     827,190       Bank of New York Co., Inc. .............           33,294,397

Multimedia - 6.2%
     289,530       Meredith Corp. .........................           10,965,949
     931,946       Time Warner, Inc. ......................           57,838,899

                                                                      68,804,848

Networking Products - 5.0%
     592,337       Cisco Systems, Inc.* ...................           54,976,278

Pharmacy Services - 0.4%
     139,890       Omnicare, Inc. .........................            4,861,177

Property and Casualty Insurance - 0.5%
      34,440       Progressive Corp. ......................            5,833,275

Publishing - Periodicals - 2.4%
     125,221       Wolters Kluwer N.V .....................           26,810,175

Radio - 3.2%
     244,010       Chancellor Media Corp.* ................     $     11,681,979
     238,565       Clear Channel Communications, Inc.* ....           13,001,792
     386,770       Infinity Broadcasting Corp. - Class A* .           10,587,829

                                                                      35,271,600

Retail - Building Products - 0.5%
      89,855       Home Depot, Inc. .......................            5,498,003

Retail - Discount - 2.6%
     301,865       Costco Companies, Inc.* ................           21,790,880
      92,010       Wal-Mart Stores, Inc. ..................            7,493,064

                                                                      29,283,944

Retail - Office Supplies - 0.8%
     200,000       Staples, Inc.* .........................            8,737,500

Retail - Regional Department Stores - 0.6%
     108,520       Fred Meyer, Inc.* ......................            6,538,330

Super-Regional Banks - 0.8%
     107,805       Northern Trust Corp. ...................            9,412,724

Telecommunication Equipment - 1.2%
     105,890       Nokia Oyj (ADR) - Class A ..............           12,753,127

Telecommunication Services - 0.2%
     125,000       Hyperion Telecommunications, Inc.
                     - Class A* ...........................            1,890,625

Telephone - Long Distance - 1.6%
     242,860       MCI WorldCom, Inc.* ....................           17,425,205

Television - 0.7%
     226,450       Univision Communications, Inc. - Class A*           8,194,659
- --------------------------------------------------------------------------------
Total Common Stock (cost $707,733,191) ....................        1,029,052,100
- --------------------------------------------------------------------------------
Preferred Stock - 0%
Computer Software - 0%
         236       SAP A.G. (cost $108,534) ...............              112,678
- --------------------------------------------------------------------------------
U.S. Government Agencies - 6.6%
                   Freddie Mac:
$ 47,700,000         4.70%, 1/4/99 ........................           47,681,318
  25,000,000         4.80%, 1/8/99 ........................           24,975,208
- --------------------------------------------------------------------------------
Total U.S. Government Agencies (amortized cost $72,656,526)           72,656,526
- --------------------------------------------------------------------------------
Total Investments (total cost $780,498,251) - 99.8% .......        1,101,821,304
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 0 2%          1,745,423
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $  1,103,566,727
- --------------------------------------------------------------------------------

Summary of Investments by Country, December 31, 1998

Country                       % of Investment Securities          Market Value
- --------------------------------------------------------------------------------
Canada                                     1.3%                 $     14,118,430
Finland                                    1.2%                       12,753,127
Germany                                     --                           112,678
Netherlands                                2.4%                       26,810,175
United States++                           95.1%                    1,048,026,894
- --------------------------------------------------------------------------------
Total                                    100.0%                   $1,101,821,304

++Includes Short-Term Securities (88.5% excluding Short-Term Securities)

See Notes to Schedules of Investments.

4  Janus Aspen Series / December 31, 1998
<PAGE>

                                       Janus | Aspen Aggressive Growth Portfolio

[PHOTO]
James P. Goff
portfolio manager

Janus Aspen  Aggressive  Growth  Portfolio  posted solid gains during the fiscal
year ended December 31, 1998,  returning 34.26% for its Institutional Shares and
33.58% for its Retirement  Shares. In comparison,  the S&P MidCap 400 Index rose
18.25%.(1)

After a strong first half, the global economy slowed in the third quarter as the
"Asian  Contagion"  spread to other  parts of the  world.  The  Federal  Reserve
responded to this negative turn of events by making three  interest rate cuts in
quick  succession,  which helped boost investor  confidence in the U.S. and jump
start our economy.

While most investors were  pleasantly  surprised that Asia's shock waves weren't
as severe  as first  thought,  the  slowdown  caused  many  large  multinational
companies to experience earnings  disappointments.  Larger technology companies,
however,  gained  considerable  momentum near year-end,  as more and more people
embraced the innovation  these  companies  continue to introduce.  Consequently,
technology  businesses  played an  instrumental  role in  pushing  U.S.  markets
forward.

A standout  among our  technology  companies  was Vitesse  Semiconductor,  which
contributed  significant  gains to the  Portfolio.  Our  confidence  in  Vitesse
prompted us to add to this position during  October's brief sell-off,  which was
caused by recession  fears. The stock has since rebounded and, at the end of the
period,  was trading above its previous highs.  Going forward,  we believe rapid
growth within the  telecommunications  and data  communications  industries will
drive demand for this company's products steadily higher.

While  our  position  in  America  Online  (AOL)  also  aided  the   Portfolio's
performance, our underweighting in this stock relative to our index placed us at
a disadvantage.  We purchased AOL when it was a mid-cap company;  however,  near
year-end its market capitalization topped out at more than $62 billion. As such,
it was the largest company in the S&P MidCap 400 Index and accounted for 7.1% of
the Index's  18.25%  gain for the year.  AOL has since been bumped up to the S&P
500 Index.

The Portfolio's  positive  results can also be attributed to several of our life
sciences  positions,  including  MedImmune,  Sepracor  and Sofamor  Danek Group.
MedImmune,  which  develops  products for the treatment of infectious  diseases,
gained from strong sales of its existing drugs, as well as optimism  surrounding
four new drugs  currently  in clinical  trials.  Sepracor's  solid  returns were
linked to  lucrative  agreements  it signed  with  several  big drug  companies,
including one with Eli Lilly for Prozac. By patenting the single-isomer versions
of many  blockbuster  drugs,  Sepracor has attracted  great  interest from large
pharmaceutical  companies  wanting to license  these drugs,  which boast reduced
side effects and longer-lasting  patents. And long-time holding Sofamor Danek, a
successful  maker  of  spinal  implants,  rose  on news  of its  acquisition  by
Medtronic.

Our interest in Internet-related  businesses  heightened in tandem with Internet
traffic  growth  during the period.  As a result,  we  established  positions in
companies we believe are driving  progress in this  business,  including  Exodus
Communications,  Lycos,  and Amazon.com.  While all of these stocks posted solid
gains,  we are  especially  excited about  Amazon.com.  This company  epitomizes
shopping on the Web.  It's  currently  planning to expand its  successful  book,
music and video business to include a one-stop-shopping service that will enable
people to buy products from as many as 300 companies.  We believe royalties from
these sales could possibly double  Amazon.com's  earnings  potential three years
out.

One reason for our substantial  outperformance  in 1998 was a lack of disasters.
We  managed  to  avoid  most of the  bigger  disappointments  and  maintained  a
portfolio of companies growing at 30% on average.  Our losers suffered primarily
from negative perceptions but continue to thrive fundamentally. For example, our
position in HealthCare Financial Partners joined other financial-related  stocks
in a decline fueled by fears surrounding global economic breakdowns. However, we
remain  impressed  with this  company's  solid  business  fundamentals  and have
increased our position.

Our holding in Apollo  Group also  faltered  because of concerns  arising from a
routine  Department  of Education  (DOE)  review.  We found these  results to be
inaccurate  based on the fact that Apollo's  universities  are  relatively  less
traditional (they cater to working adults) than most other institutions reviewed
by the DOE. Our confidence in this company is further  boosted by its increasing
enrollment and revenue figures. Consequently, we also added to this position.

In the near  term,  we  believe a slowing  world  economy  will lead to  further
lackluster corporate earnings growth.  Nonetheless,  we adamantly believe we can
continue to uncover  compelling  growth stories  irrespective  of  macroeconomic
trends.  Our hope is that as earnings growth scarcity  continues,  a premium for
growth will be placed on our companies, leading to further gains.

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

Portfolio Asset Mix                  December 31, 1998         December 31, 1997
- --------------------------------------------------------------------------------
Equities                                     95.6%                    97.0%
  Foreign                                     9.7%                    13.6%
Number of Stocks                                50                       68
Top 10 Equities                              47.4%                    41.5%
Cash & Cash Equivalents                       4.4%                     3.0%
- --------------------------------------------------------------------------------
(1) All returns include reinvested dividends.

                                       Janus Aspen Series / December 31, 1998  5
<PAGE>

Average Annual Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 9/13/93)
  1 Year                                                     34.26%
  5 Year                                                     19.35%
  From Inception                                             21.96%
- --------------------------------------------------------------------------------
S&P MidCap 400 Index
  1 Year                                                     18.25%
  5 Year                                                     18.67%
  From Inception Date of Institutional Shares                18.06%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/97)
  1 Year                                                     33.58%
  5 Year (unaudited)                                         17.05%
  From Portfolio Inception (unaudited)                       21.14%
- --------------------------------------------------------------------------------
Returns shown for  Retirement  Shares for periods  prior to their  inception are
derived from the historical  performance of  Institutional  Shares,  adjusted to
reflect the higher operating expenses of Retirement Shares.

Note: Performance of the Retirement  Shares is lower from the performance  shown
      on this graph for the  Institutional  Shares,  based upon the higher  fees
      paid by shareholders investing in this class.

Performance Overview(1)

[GRAPHIC OMITTED]

A graphic comparison of the change in value of a hypothetical $10,000 investment
in Janus Aspen Aggressive  Growth  Portfolio - Institutional  Shares and the S&P
MidCap 400 Index. Janus Aspen Aggressive Growth Portfolio - Institutional Shares
is represented by a shaded area of blue. The S&P MidCap 400 Index is represented
by a solid black line.  The "y" axis reflects the value of the  investment.  The
"x" axis reflects the computation  periods from  inception,  September 13, 1993,
through December 31, 1998. The upper right quadrant reflects the ending value of
the  hypothetical  investment  in Janus  Aspen  Aggressive  Growth  Portfolio  -
Institutional  Shares  ($28,587)  as  compared  to  the  S&P  MidCap  400  Index
($24,072).

Average Annual Total Return 
for the periods ended December 31, 1998 
One Year, 34.26% 
Five Year, 19.35% 
Since 9/13/93,* 21.96%

Janus Aspen Aggressive Growth Portfolio
- - Institutional Shares - $28,587

S&P MidCap 400 Index - $24,072

*The Portfolio's inception date.
Source - Lipper Analytical Services, Inc. 1998.

(1)  All returns reflect reinvested  dividends.  The Portfolio's  securities may
     differ significantly from the securities in the Index. Index returns do not
     include  taxes or  dividends  and interest  payments or operating  expenses
     necessary to maintain a portfolio  consisting of the same  securities  that
     are in the Index.  These returns do not reflect the charges and expenses of
     any particular  insurance product or qualified plan.  Investment return and
     principal value will fluctuate so that shares, when redeemed,  may be worth
     more or less than their  original cost.  The adviser  voluntarily  waives a
     portion of the Portfolio's  expenses.  Without such waiver, the Portfolio's
     total returns for each class would have been lower.  Past  performance does
     not guarantee future results.

SCHEDULE OF INVESTMENTS

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Common Stock - 95.6%
Advertising Sales - 1.6%
     421,884       Outdoor Systems, Inc.* .................     $     12,656,520

Advertising Services - 1.6%
     323,425       HA-LO Industries, Inc.* ................           12,168,866

Aerospace and Defense - 1.0%
     176,825       Orbital Sciences Corp.* ................            7,824,506

Airlines - 1.8%
     362,098       Ryanair Holdings PLC (ADR)* ............           13,669,199

Audio and Video Products - 0.4%
      60,090       Gemstar International Group, Ltd.* .....            3,440,152

Cable Television - 1.8%
     193,125       Adelphia Communications Corp. - Class A*            8,835,469
     138,825       TCA Cable TV, Inc. .....................            4,954,317

                                                                      13,789,786

Cellular Telecommunications - 2.9%
     590,820       Crown Castle International Corp.* ......           13,884,270
     221,050       WinStar Communications, Inc.* ..........            8,620,950

                                                                      22,505,220

Circuits - 7.0%
   1,180,590       Vitesse Semiconductor Corp.* ...........           53,864,419

Commercial Banks - 3.4%
     209,950       Firstar Corp. ..........................           19,577,838
      85,180       U.S. Trust Corp. .......................            6,473,680

                                                                      26,051,518

Commercial Services - 3.9%
     581,323       Paychex, Inc. ..........................     $     29,901,802

Computers - Integrated Systems - 0.6%
      65,167       Equant N.V. - New York Shares* .........            4,419,137

Computers - Memory Devices - 4.1%
     534,745       VERITAS Software Corp.* ................           32,051,278

Finance - Investment Bankers/Brokers - 1.8%
     243,780       Charles Schwab Corp. ...................           13,697,389

Finance - Other Services - 2.0%
     381,591       HealthCare Financial Partners, Inc.* ...           15,215,941

Human Resources - 1.5%
     814,892       Capita Group PLC** .....................            7,511,223
      96,400       Robert Half International, Inc.* .......            4,307,875

                                                                      11,819,098

Internet Content - 0.9%
      51,290       Broadcast.com, Inc.* ...................            3,923,685
      91,035       InfoSpace.com, Inc.* ...................            3,470,709

                                                                       7,394,394

Internet Software - 2.6%
      90,840       America Online, Inc.* ..................           13,149,090
      68,690       Exodus Communications, Inc.* ...........            4,413,333
      53,130       Lycos, Inc.* ...........................            2,952,036

                                                                      20,514,459

Lasers - Systems and Components - 1.1%
     117,655       Uniphase Corp.* ........................            8,162,316

See Notes to Schedules of Investments.

6  Janus Aspen Series / December 31, 1998
<PAGE>

                                       Janus | Aspen Aggressive Growth Portfolio

SCHEDULE OF INVESTMENTS (continued)

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Medical - Drugs - 5.9%
     235,270       MedImmune, Inc.* .......................     $     23,394,661
     249,775       Sepracor, Inc.* ........................           22,011,422

                                                                      45,406,083

Medical - Generic Drugs - 0.9%
     104,915       Watson Pharmaceuticals, Inc.* ..........            6,596,531

Medical Instruments - 1.2%
      74,990       Sofamor Danek Group, Inc.* .............            9,130,033

Networking Products - 2.0%
     169,560       Cisco Systems, Inc.* ...................           15,737,288

Pharmacy Services - 3.0%
     674,555       Omnicare, Inc. .........................           23,440,786

Radio - 13.0%
     317,050       Chancellor Media Corp.* ................           15,178,769
     333,925       Clear Channel Communications, Inc.* ....           18,198,912
     724,030       Heftel Broadcasting Corp. - Class A* ...           35,658,477
     490,915       Jacor Communications, Inc.* ............           31,602,653

                                                                     100,638,811

Resorts and Theme Parks - 0.9%
     232,365       Premier Parks, Inc. ....................            7,029,041

Retail - Drug Store - 1.8%
     259,870       CVS Corp. ..............................           14,292,850

Retail - Internet - 1.9%
      44,795       Amazon.com, Inc.* ......................           14,390,394

Retail - Pubs - 1.6%
   4,110,285       J.D. Wetherspoon PLC** .................           12,241,252

Retail - Restaurants - 3.8%
   2,207,716       PizzaExpress PLC** .....................           29,459,029

Schools - 13.4%
   2,494,771       Apollo Group, Inc. - Class A* ..........           84,510,368
     557,885       ITT Educational Services, Inc.* ........           18,968,090

                                                                     103,478,458

Telecommunication Services - 4.4%
      35,755       Global Crossing, Ltd.* .................            1,613,444
     210,305       Level 3 Communications, Inc.* ..........            9,069,403
      18,135       MetroNet Communications Corp.* .........              607,523
     313,430       Qwest Communications International, Inc.*          15,671,500
     251,490       RSL Communications, Ltd.* ..............            7,418,955

                                                                      34,380,825

Telephone - Integrated - 0%
         360       NEXTLINK Communications, Inc.* .........               10,215

Television - 1.0%
     209,288       Univision Communications, Inc. - Class A*           7,573,609

Wireless Equipment - 0.8%
     205,875       American Tower Corp. - Class A .........            6,086,180
- --------------------------------------------------------------------------------
Total Common Stock (cost $491,820,724) ....................          739,037,385
- --------------------------------------------------------------------------------
U.S. Government Agency - 3.0%
                   Freddie Mac
$ 23,100,000         4.70%, 1/4/99 
                     (amortized cost $23,090,952) .........     $     23,090,952
- --------------------------------------------------------------------------------
Total Investments (total cost $514,911,676) - 98.6% .......          762,128,337
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 1 4%         10,831,809
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $    772,960,146
- --------------------------------------------------------------------------------

Summary of Investments by Country, December 31, 1998

Country                       % of Investment Securities          Market Value
- --------------------------------------------------------------------------------
Bermuda                                    1.0%                 $      7,418,955
Ireland                                    1.8%                       13,669,199
Netherlands                                0.6%                        4,419,137
United Kingdom                             6.4%                       49,211,504
United States++                           90.2%                      687,409,542
- --------------------------------------------------------------------------------
Total                                    100.0%                 $    762,128,337

++Includes Short-Term Securities (87.2% excluding Short-Term Securities)

Forward Currency Contracts, Open at December 31, 1998

Currency Sold and                  Currency            Currency     Unrealized
Settlement Date                  Units Sold     Value in $ U.S.    Gain/(Loss)
- --------------------------------------------------------------------------------
British Pound 4/7/99             13,080,000         $21,605,544       $374,574
British Pound 5/13/99             1,015,000           1,675,968          2,842
- --------------------------------------------------------------------------------
Total                                               $23,281,512       $377,416

See Notes to Schedules of Investments.

                                       Janus Aspen Series / December 31, 1998  7
<PAGE>

Janus | Aspen Capital Appreciation Portfolio

[PHOTO]
Scott W. Schoelzel
portfolio manager

I'd like to thank all of you for your continued commitment and confidence during
what was a tremendous year for Janus Aspen Capital Appreciation  Portfolio.  For
the 12-month  period ended  December 31,  1998,  the  Portfolio's  Institutional
Shares gained 58.11% and its Retirement Shares gained 57.37%. This compares with
the 28.74% return posted by the S&P 500 Index.(1)

One principle of the  Portfolio is to invest in companies  that provide more and
more of the  goods  and  services  you and I use in our  everyday  lives.  These
companies  span a wide range of industries,  representing  what we believe to be
the most dynamic growth areas of the market.  Particularly  astonishing has been
the  pace  of  innovation  and   development   within  the   telecommunications,
technology, pharmaceutical,  financial services, retailing and media businesses.
Rapid  progress in these areas often makes it a challenge to keep up. So the job
our research  analysts have done in identifying and analyzing the  opportunities
responsible  for the  Portfolio's  strong  results  has  been  nothing  short of
extraordinary.

That said, we experienced  powerful moves by a number of our technology  stocks.
Most of our gains were fueled by Internet  growth,  which I believe  will be the
single most influential  phenomenon  affecting our lives over the next 10 years.
The Internet has no road maps. It's virgin territory. And it continues to impact
how we work, learn and entertain ourselves in ways we'd never imagined.

Three Internet-related stocks posting outstanding results during the period were
Dell  Computer,  returning  248%,  Microsoft,  gaining 115%,  and America Online
(AOL), moving up 586%. As the Portfolio's largest position,  AOL was our biggest
winner.  AOL is already  signing up an average of one million new  subscribers a
month,  and we believe this company is taking  strategic steps that will lead to
even  more  growth.   For   example,   its  planned   acquisition   of  Netscape
Communications  and joint  venture  with Sun  Microsystems  could help build and
direct more Internet traffic its way, particularly among business users.

Life  sciences is another  area in which we continue to see a  proliferation  of
opportunities.  Our positions in Pfizer,  Warner-Lambert and Eli Lilly benefited
from the increased  acceptance of a number of recently  launched  drugs,  all of
which have proven  successful in treating  everything from elevated  cholesterol
levels to osteoporosis.  Going forward,  we expect the pipeline of "blockbuster"
drugs to accelerate throughout this broad industry.

Telecommunications  continues to offer great  potential as well.  Gains from our
relatively  new  position in Nokia,  a leader in the  cellular  phone  equipment
industry,  were driven by the increasing use of cellular phones both in the U.S.
and  around  the  world.  There  are  currently  about 250  million  subscribers
worldwide, and we expect an increase to more than 600 million in the next couple
of years. We believe Nokia is well positioned to maintain its leadership.

Despite the Portfolio's  noteworthy gains,  there were stocks that fell short of
our expectations.  Our financial services  holdings,  once thought to be some of
the more stable and predictable in the Portfolio,  proved to be some of the most
volatile.  The Asian economic crisis,  Russian debt fiasco, hedge fund meltdowns
and assimilation  difficulties with some of the  higher-profile  banking mergers
all contributed to our loss of confidence.  Consequently,  we chose to liquidate
our positions in Citigroup,  BankAmerica and American  Express but will continue
to monitor future developments.

Looking  ahead,  I believe the  volatility  we saw during the second half of the
period - motivated largely by the speed and sheer volume by which information is
now  being  disseminated  - is  only  a  precursor  to  future  market  actions.
Nonetheless,  I remain very bullish on the  longer-term  prospects for financial
assets,  particularly  growth  stocks.  I would,  however,  urge you to maintain
realistic expectations going forward. The average return on stocks over the past
30 years is around 11%, not 40%. (And, yes, some years even produce losses!)

Finally,  because  I'm  just  like  you -  investing  for  my  kids'  education,
retirement  and such - my money  management  style is probably a lot like yours.
Therefore,  rest assured that the next time the market swoons,  I know firsthand
what you're going through, and I'm working hard to navigate the uncertainties of
the marketplace with your best interests in mind.

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

Portfolio Asset Mix                  December 31, 1998         December 31, 1997
- --------------------------------------------------------------------------------
Equities                                     89.7%                    81.0%
  Foreign                                     5.9%                     7.2%
  Europe                                      5.9%                     7.2%
Top 10 Equities                              57.5%                    42.4%
Number of Stocks                                23                       33
Cash & Cash Equivalents                      10.3%                    19.0%
- --------------------------------------------------------------------------------
(1) All returns include reinvested dividends.

8  Janus Aspen Series / December 31, 1998
<PAGE>

Average Annual Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 5/1/97)
  1 Year                                                     58.11%
  From Inception                                             51.65%
- --------------------------------------------------------------------------------
S&P 500 Index
  1 Year                                                     28.74%
  From Inception Date of Institutional Shares                31.38%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/97)
  1 Year                                                     57.37%
  From Inception                                             50.93%
- --------------------------------------------------------------------------------
Note: Performance of the Retirement  Shares is lower from the performance  shown
      on this graph for the  Institutional  Shares,  based upon the higher  fees
      paid by shareholders investing in this class.

Performance Overview(1)

[GRAPHIC OMITTED]

A graphic comparison of the change in value of a hypothetical $10,000 investment
in Janus Aspen Capital Appreciation Portfolio - Institutional Shares and the S&P
500 Index. Janus Aspen Capital Appreciation  Portfolio - Institutional Shares is
represented  by a shaded  area of blue.  The S&P 500 Index is  represented  by a
solid black line.  The "y" axis  reflects the value of the  investment.  The "x"
axis  reflects the  computation  periods from  inception,  May 1, 1997,  through
December 31,  1998.  The upper right  quadrant  reflects the ending value of the
hypothetical   investment  in  Janus  Aspen  Capital  Appreciation  Portfolio  -
Institutional Shares ($20,017) as compared to the S&P 500 Index ($15,778).

Average Annual Total Return 
for the periods ended December 31, 1998 
One Year, 58.11% 
Since 5/1/97,* 51.65%

Janus Aspen Capital Appreciation Portfolio
- - Institutional Shares - $20,017

S&P 500 Index - $15,778

*The Portfolio's inception date.
Source - Lipper Analytical Services, Inc. 1998.

(1)  All returns reflect reinvested  dividends.  The Portfolio's  securities may
     differ significantly from the securities in the Index. Index returns do not
     include  taxes or  dividends  and interest  payments or operating  expenses
     necessary to maintain a portfolio  consisting of the same  securities  that
     are in the Index.  These returns do not reflect the charges and expenses of
     any particular  insurance product or qualified plan.  Investment return and
     principal value will fluctuate so that shares, when redeemed,  may be worth
     more or less than their  original cost.  The adviser  voluntarily  waives a
     portion of the Portfolio's  expenses.  Without such waiver, the Portfolio's
     total returns for each class would have been lower.  Past  performance does
     not guarantee future results.

SCHEDULE OF INVESTMENTS

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Common Stock - 89.7%
Applications Software - 0.6%
       6,340       Intuit, Inc.* ..........................     $        459,650

Cable Television - 3.1%
      42,150       Tele-Communications, Inc. - Class A* ...            2,331,422

Computer Software - 5.4%
      29,090       Microsoft Corp.* .......................            4,034,419

Computers - Memory Devices - 3.2%
      27,855       EMC Corp.* .............................            2,367,675

Computers - Micro - 3.5%
      35,121       Dell Computer Corp.* ...................            2,570,418

Diversified Operations - 0.5%
       3,935       General Electric Co. ...................              401,616

Electronic Components - 3.6%
      29,030       Solectron Corp.* .......................            2,697,976

Electronic Components - Semiconductor - 4.2%
      36,685       Texas Instruments, Inc. ................            3,138,860

Internet Content - 4.5%
      33,965       At Home Corp. - Class A* ...............            2,521,901
       6,485       Inktomi Corp.* .........................              838,997

                                                                       3,360,898

Internet Software - 12.8%
      65,665       America Online, Inc.* ..................            9,505,009

Medical - Drugs - 7.5%
      24,735       Eli Lilly and Co. ......................     $      2,198,323
      20,769       Pfizer, Inc. ...........................            2,605,211
       9,669       Warner-Lambert Co. .....................              726,988

                                                                       5,530,522

Medical Information Systems - 4.2%
      40,785       IMS Health, Inc. .......................            3,076,718

Multimedia - 8.8%
     104,610       Time Warner, Inc. ......................            6,492,358

Networking Products - 4.7%
      37,272       Cisco Systems, Inc.* ...................            3,459,308

Retail - Building Products - 3.4%
      40,595       Home Depot, Inc. .......................            2,483,907

Retail - Discount - 6.8%
      29,605       Costco Companies, Inc.* ................            2,137,111
      35,755       Wal-Mart Stores, Inc. ..................            2,911,798

                                                                       5,048,909

Telecommunication Equipment - 8.9%
      20,305       Lucent Technologies, Inc. ..............            2,233,550
      36,275       Nokia Oyj (ADR) - Class A ..............            4,368,870

                                                                       6,602,420

Telephone - Long Distance - 4.0%
      41,335       MCI WorldCom, Inc.* ....................            2,965,786
- --------------------------------------------------------------------------------
Total Common Stock (cost $46,355,348) .....................           66,527,871
- --------------------------------------------------------------------------------

See Notes to Schedules of Investments.

                                       Janus Aspen Series / December 31, 1998  9
<PAGE>

Janus | Aspen Capital Appreciation Portfolio

SCHEDULE OF INVESTMENTS (continued)

Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
U.S. Government Agency - 8.2%
                   Freddie Mac
$  6,100,000         4.70%, 1/4/99
                     (amortized cost $6,097,611) ..........     $      6,097,611
- --------------------------------------------------------------------------------
Total Investments (total cost $52,452,959) - 97.9% ........           72,625,482
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 2 1%          1,581,739
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $     74,207,221
- --------------------------------------------------------------------------------

Summary of Investments by Country, December 31, 1998

Country                       % of Investment Securities          Market Value
- --------------------------------------------------------------------------------
Finland                                    6.0%                 $      4,368,870
United States++                           94.0%                       68,256,612
- --------------------------------------------------------------------------------
Total                                    100.0%                 $     72,625,482

++Includes Short-Term Securities (85.6% excluding Short-Term Securities)

See Notes to Schedules of Investments.

10  Janus Aspen Series / December 31, 1998
<PAGE>

Janus | Aspen International Growth Portfolio

[PHOTO]
Helen Young Hayes
portfolio manager

[PHOTO]
Laurence Chang
portfolio manager

For the fiscal year ended December 31, 1998,  Janus Aspen  International  Growth
Portfolio  returned  17.23%  for the  Institutional  Shares  and  16.86% for the
Retirement Shares. These gains trailed the Morgan Stanley Capital  International
EAFE Index's return of 20%.(1)

When the  period  began,  low  interest  rates and  strong  corporate  earnings,
particularly in the U.S. and Western Europe, enabled international stock markets
to move  steadily  higher.  Although the  Japanese  and Asian  markets were much
weaker in  comparison,  their weakness  helped keep  commodity  prices in check,
which in turn  created a more  favorable  inflationary  environment  with  lower
interest  rates.   However,  in  July,  the  Russian  currency  devaluation  and
subsequent debt crisis caused  international  stock markets to begin to capsize.
Also  contributing to this volatility were political and economic  uncertainties
in Japan, Germany and the U.S.

In the U.S.,  the Federal  Reserve  reacted to these  negative  events by making
three  consecutive  interest rate cuts.  Several other  countries  soon followed
suit, and by year-end rates had been cut in 60 countries around the world.  This
effectively   bolstered   investor   sentiment  and  stabilized  equity  markets
worldwide.  Global economic  growth  therefore  continued,  albeit at a somewhat
slower pace.

Despite  strong  performance  for the first  eight  months of the year,  we were
disappointed  that we did not keep pace with our  benchmark,  the Morgan Stanley
EAFE Index,  for the 12-month  period.  This was partly due to our  weighting in
European stocks.  European markets were significantly  impacted during the third
quarter's  dramatic  sell-off  and still  have not  recovered  completely.  Also
restraining our  performance was our relatively  small weighting in Japan versus
the index. Because Japanese stocks began the period at already depressed levels,
they simply did not have large gains to give up.

Among the Portfolio's  biggest  disappointments was our position in UBS, a large
Swiss banking and financial services  conglomerate.  Damaged by the Russian debt
crisis,  this company was forced to write down not only its loans to Russia, but
also its  exposure to hedge funds and Russian  bonds.  We  subsequently  cut our
position at a loss, but maintain  holdings in this and other European  financial
services  stocks  given  their solid  underlying  fundamentals  and  inexpensive
valuations.

Alcatel was another holding that  underperformed  during the period. This French
telecommunications  equipment vendor reported  disappointing order trends in its
public telephone  business.  Also  contributing to its decline was weaker global
economic growth,  which pressured its revenue and profit outlook.  Consequently,
our  earnings  expectations  for this  company  were cut  dramatically,  and the
position was reduced at a loss.

Additional  stocks that were hit during the third quarter  sell-off were rapidly
growing  companies,  such as COLT  Telecom  Group  in the UK,  and  economically
sensitive  companies,  such as Renault in France.  In the first case,  investors
were unwilling to hold stocks with strong earnings potential but a small current
earnings base.  Meanwhile,  cyclical or economically  sensitive  businesses were
bruised by fears of a possible  global  recession.  Both  categories  have since
rebounded, with some back at their all-time highs. Nonetheless,  cyclical stocks
remain below recent levels as well as historical valuation measures.

Despite our  disappointments,  the Portfolio had many outstanding  stocks during
the year.  Among our most  impressive  performers  was Wolters  Kluwer,  a Dutch
publishing  company  that has  virtually  no exposure to emerging  markets.  The
company's  steady  revenue  streams  helped  its stock  gain a solid 58% for the
fiscal year.  Securitas also ended the period with exceptional  results - up 58%
for  the  period.   This  Swedish   security  firm  made  two  very  significant
acquisitions  that we believe could help  accelerate its earnings beyond the 20%
growth  rate  Securitas  has seen over the past few  years.  Another  winner was
Nokia, a Finnish  telecommunications  equipment maker. As consumers increasingly
recognize the convenience and productivity  afforded by wireless telephones,  we
remain bullish on Nokia's prospects.

Several  of  the  Portfolio's   European  technology  holdings  also  aided  our
performance,  including Cap Gemini and Getronics.  Despite their strong returns,
these two companies gave up some of their gains in the fourth quarter.  This was
due to concerns  about a potential  post-year  2000  slowdown  in  corporate  IT
spending, which we believe would be only a temporary situation.

Looking  ahead,  it appears the worst of the  volatility is behind us. We remain
positive on the outlook for global  interest  rates and expect modest growth for
the upcoming year.  Stock price  valuations in foreign markets have come down to
levels we have not seen for quite a while. In addition,  positive secular trends
in  Europe  are  continuing,  such  as  increased  focus  on  profitability  and
shareholder value. Europe's introduction of the euro in 1999 should also benefit
its  economy,  helping to  formalize  the  integration  of Europe as an economic
entity.

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

Portfolio Asset Mix                  December 31, 1998         December 31, 1997
- --------------------------------------------------------------------------------
Equities                                     91.0%                    91.6%
  Foreign                                    89.3%                    90.1%
Number of Stocks                               146                      188
Top 10 Equities                              26.4%                    22.9%
Cash & Fixed-Income
  Securities                                  9.0%                     8.4%
- --------------------------------------------------------------------------------
(1) All returns include reinvested dividends.

                                      Janus Aspen Series / December 31, 1998  11
<PAGE>

Average Annual Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 5/2/94)
  1 Year                                                     17.23%
  From Inception                                             18.87%
- --------------------------------------------------------------------------------
Morgan Stanley Capital International EAFE Index(2)
  1 Year                                                     20.00%
  From Inception Date of Institutional Shares                 8.11%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/97)
  1 Year                                                     16.86%
  From Portfolio Inception (unaudited)                       17.92%
- --------------------------------------------------------------------------------
Returns shown for  Retirement  Shares for periods  prior to their  inception are
derived from the historical  performance of  Institutional  Shares,  adjusted to
reflect the higher operating expenses of Retirement Shares.

Note: Performance of the Retirement  Shares is lower from the performance  shown
      on this graph for the  Institutional  Shares,  based upon the higher  fees
      paid by shareholders investing in this class.

Performance Overview(1)

[GRAPHIC OMITTED]

A graphic comparison of the change in value of a hypothetical $10,000 investment
in Janus Aspen  International  Growth  Portfolio - Institutional  Shares and the
Morgan  Stanley  Capital  International  EAFE Index.  Janus Aspen  International
Growth Portfolio - Institutional Shares is represented by a shaded area of blue.
The Morgan Stanley  Capital  International  EAFE Index is represented by a solid
black line.  The "y" axis  reflects  the value of the  investment.  The "x" axis
reflects the computation  periods from inception,  May 2, 1994, through December
31, 1998. The upper right quadrant reflects the ending value of the hypothetical
investment in Janus Aspen International  Growth Portfolio - Institutional Shares
($22,403) as compared to the Morgan  Stanley  Capital  International  EAFE Index
($14,389).

Average Annual Total Return 
for the periods ended December 31, 1998 
One Year, 17.23% 
Since 5/2/94,* 18.87%

Janus Aspen International Growth Portfolio
- - Institutional Shares - $22,403

Morgan Stanley Capital
International EAFE
Index - $14,389

*The Portfolio's inception date.
Source - Lipper Analytical Services, Inc. 1998.

(1)  All returns reflect reinvested  dividends.  The Portfolio's  securities may
     differ significantly from the securities in the Index. Index returns do not
     include  taxes or  dividends  and interest  payments or operating  expenses
     necessary to maintain a portfolio  consisting of the same  securities  that
     are in the Index.  These returns do not reflect the charges and expenses of
     any particular  insurance product or qualified plan.  Investment return and
     principal value will fluctuate so that shares, when redeemed,  may be worth
     more or less than their  original cost.  The adviser  voluntarily  waives a
     portion of the Portfolio's  expenses.  Without such waiver, the Portfolio's
     total returns for each class would have been lower.  Past  performance does
     not guarantee 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.

SCHEDULE OF INVESTMENTS

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Common Stock - 88.5%
Advertising Agencies - 1.2%
     632,959       WPP Group PLC** ........................     $      3,843,875

Airlines - 0.1%
      11,248       SAS Norge ASA - Class B ................               94,487
      19,316       SAS Sverige A.B.** .....................              177,538

                                                                         272,025

Appliances - 0.9%
     163,952       Electrolux A.B. - Class B** ............            2,821,687

Audio and Video Products - 0.7%
      31,000       Sony Corp.** ...........................            2,261,859

Automotive - Cars and Light Trucks - 2.2%
      17,503       DaimlerChrysler A.G.*,** ...............            1,728,730
      15,056       DaimlerChrysler A.G. (ADR)*,** .........            1,446,317
      29,000       Honda Motor Co., Ltd.** ................              953,841
      50,762       Renault S.A ............................            2,280,924
      14,171       Volvo A.B. - Class B** .................              325,186

                                                                       6,734,998

Automotive - Truck Parts and Equipment - 0.8%
      29,974       Valeo S.A.+ ............................            2,363,146

Beverages - Non-Alcoholic - 0.1%
      18,280       Coca-Cola Femsa S.A. (ADR) .............              242,210

Beverages - Wine and Spirits - 0.6%
     179,618       Diageo PLC** ...........................            1,994,812

Brewery - 0.7%
     170,000       Kirin Brewery Co., Ltd.** ..............            2,170,278

Broadcast Services and Programming - 0.7%
       9,375       Fox Entertainment Group, Inc.* .........     $        236,133
      77,695       Grupo Televisa S.A. (GDR)* .............            1,918,095

                                                                       2,154,228

Building and Construction - 0.9%
      13,769       Suez Lyonnaise des Eaux ................            2,829,715

Building Products - Cement and Aggregate - 0.1%
      11,764       Cimpor-Cimentos de Portugal S.A ........              375,534

Cellular Telecommunications - 6.4%
      10,597       Cellular Communications International, Inc.*          720,596
   1,010,000       China Telecom, Ltd.* ...................            1,746,993
       4,706       MobilCom A.G.** ........................            1,498,947
         255       NTT Mobile Communication
                     Network, Inc.** ......................           10,512,284
       9,580       Orange PLC*,** .........................              109,980
       7,458       Panafon Hellenic Telecom S.A.*,+ .......              199,738
     472,870       Telecom Italia Mobile S.p.A. ...........            3,499,581
     103,040       Vodafone Group PLC** ...................            1,676,662

                                                                      19,964,781

Chemicals - Diversified - 0.7%
      20,618       Akzo Nobel N.V.** ......................              939,345
      28,467       Hoechst A.G.** .........................            1,181,051

                                                                       2,120,396

Closed-End Funds - 0%
         163       Romania Investment Fund*,+ .............              118,358

See Notes to Schedules of Investments.

12  Janus Aspen Series / December 31, 1998
<PAGE>

Janus | Aspen International Growth Portfolio

SCHEDULE OF INVESTMENTS (continued)

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Commercial Banks - 1.0%
      40,500       Argentaria, Caja Postal y Banco Hipotecario
                     de Espana S.A ........................     $      1,050,435
      55,566       Banco Central Hispanoamericano .........              660,794
       6,275       Bayerische Vereinsbank A.G.** ..........              491,669
      48,643       Den Norske Bank A.S.A ..................              167,916
          16       Julius Baer Holding A.G. - Class B** ...               53,179
       1,053       Kapital Holdings .......................               52,118
     108,194       Unicredito Italiano S.p.A ..............              640,479

                                                                       3,116,590

Computer Services - 4.3%
       5,368       Atos S.A.* .............................            1,283,859
      28,043       Cap Gemini S.A.+ .......................            4,503,139
      13,041       EDB - Elektronisk Databehandling A.S.A .               32,522
      62,915       Getronics N.V.** .......................            3,117,810
     371,025       Logica PLC** ...........................            3,228,537
     138,413       Misys PLC** ............................            1,017,888
       3,912       WM-Data A.B. - Class B** ...............              166,991

                                                                      13,350,746

Computer Software - 0.5%
      15,970       JBA Holdings PLC** .....................               50,485
      32,502       Tieto Corp. - Class B ..................            1,457,147

                                                                       1,507,632

Computers - Integrated Systems - 1.2%
       8,408       Equant N.V.*,** ........................              585,368
      16,734       Equant N.V. - New York Shares*,** ......            1,134,774
      92,300       Fujitsu, Ltd.** ........................            1,231,522
      90,387       SEMA Group PLC** .......................              891,788

                                                                       3,843,452

Cosmetics and Toiletries - 2.7%
     375,000       Kao Corp.** ............................            8,477,648

Cruise Lines - 0.1%
     119,500       NCL Holdings A.S.A.* ...................              282,329

Diversified Operations - 10.2%
     348,778       Hays PLC** .............................            3,075,571
      24,329       Lagardere S.C.A ........................            1,034,395
     811,586       Rentokil Initial PLC** .................            6,127,990
     358,051       Siebe PLC** ............................            1,405,911
     168,112       Tomkins PLC** ..........................              799,955
      67,560       Unilever N.V.** ........................            5,777,996
       6,997       VEBA A.G.** ............................              418,847
      37,677       Vivendi ................................            9,780,088
     564,881       Williams PLC** .........................            3,233,079

                                                                      31,653,832

Drug Delivery Systems - 2.0%
      87,297       Elan Corp. PLC (ADR)* ..................            6,072,598

Electronic Components - 1.1%
      17,013       Electrocomponents PLC** ................              112,376
      25,709       Koninklijke Philips Electronics N.V.** .            1,726,109
      20,935       Philips Electronics N.V ................
                     - New York Shares** ..................            1,417,038

                                                                       3,255,523

Electronic Components - Semiconductors - 0.1%
       2,500       Rohm Co., Ltd.** .......................              228,065

Electronic Measuring Instruments - 0.1%
      16,530       Simac Techniek N.V.** ..................     $        418,388

Finance - Other Services - 0.5%
      42,040       Newcourt Credit Group, Inc. ............            1,464,339
       5,985       Newcourt Credit Group, Inc. ............
                     - New York Shares ....................              209,101

                                                                       1,673,440

Food - Catering - 1.7%
     453,291       Compass Group PLC** ....................            5,181,252

Food - Diversified - 1.2%
      11,212       Danone .................................            3,211,453
      38,517       Raisio Group PLC .......................              418,391

                                                                       3,629,844

Food - Retail - 1.0%
       1,878       Carrefour S.A ..........................            1,418,416
      47,547       Koninklijke Ahold N.V.** ...............            1,758,309

                                                                       3,176,725

Hotels and Motels - 0%
          85       EIH, Ltd.+ .............................                  446

Human Resources - 1.9%
       4,722       Adecco S.A.** ..........................            2,155,612
     303,308       Capita Group PLC** .....................            2,795,725
       9,640       Select Appointments Holdings PLC** .....               99,442
      45,545       Select Appointments Holdings PLC (ADR)**              979,218

                                                                       6,029,997

Investment Companies - 0.3%
       4,479       Ratin A/S - B Shares ...................              950,082

Investment Management and Advisory Services - 0.3%
     104,715       Amvescap PLC** .........................              810,145

Life and Health Insurance - 0.1%
         230       Schweizerische Lebensversicherungs-und
                     Rentenanstalt** ......................              170,807

Machinery - General Industrial - 3.5%
      95,225       Mannesmann A.G.** ......................           10,920,265

Medical - Biomedical and Genetic - 0%
          22       Ares-Serono Group - Class B** ..........               34,854

Medical - Drugs              9.9%
      90,697       Astra A.B. - Class A** .................            1,851,863
      86,411       Glaxo Wellcome PLC** ...................            2,983,239
      10,645       Merck KGaA** ...........................              479,353
       1,501       Novartis A.G.** ........................            2,950,676
       3,852       Pharmacia & Upjohn, Inc.** .............              215,755
      72,650       Pharmacia & Upjohn, Inc. ...............            4,113,806
      50,235       Rhone-Poulenc S.A ......................            2,586,388
         374       Roche Holding A.G.** ...................            4,563,758
      10,463       Sanofi S.A .............................            1,723,227
       6,053       Schering A.G.** ........................              760,475
      42,852       SmithKline Beecham PLC** ...............              594,753
      35,175       SmithKline Beecham PLC (ADR)** .........            2,444,663
       2,290       Synthelabo .............................              484,974
     129,000       Takeda Chemical Industries** ...........            4,974,884

                                                                      30,727,814

Medical Products - 0%
       2,792       Ortivus A.B.*,** .......................               20,323

See Notes to Schedules of Investments.

                                      Janus Aspen Series / December 31, 1998  13
<PAGE>

Janus | Aspen International Growth Portfolio

SCHEDULE OF INVESTMENTS (continued)

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Metal Processsors and Fabricators - 1.3%
     106,744       Assa Abloy A.B. - Class B** ............     $      4,082,471

Money Center Banks - 3.6%
     217,757       Banca Commerciale Italiana .............            1,512,645
   1,269,662       Banca di Roma* .........................            2,155,255
      80,638       Banco Bilbao Vizcaya S.A ...............            1,280,498
       8,609       Bank Austria A.G .......................              438,015
     211,506       Lloyds TSB Group PLC** .................            3,012,294
      60,700       Skandinaviska Enskilda Banken - Class A**             640,284
       7,106       UBS A.G.** .............................            2,183,306

                                                                      11,222,297

Mortgage Banks - 1.1%
      39,919       Deutsche Pfandbrief-und
                     Hypothekenbank A.G.** ................            3,499,301

Multi-Line Insurance - 2.3%
       6,881       Aegon N.V.** ...........................              845,519
         870       Baloise Holding Ltd. - Class R** .......              902,633
       1,385       ERGO Versicherungs Gruppe A.G.** .......              228,682
      53,548       Sampo Insurance Co. PLC - Class A ......            2,041,117
       4,233       Zurich Allied A.G.** ...................            3,134,341

                                                                       7,152,292

Office Furnishings - 0.1%
      14,624       Koninklijke Ahrend N.V.** ..............              334,300

Publishing - Periodicals - 3.1%
      44,389       Wolters Kluwer N.V.** ..................            9,503,812

Retail - Diversified - 0.6%
      28,000       Ito-Yokado Co., Ltd.** .................            1,961,052

Retail - Major Department Stores - 0.6%
      24,027       Metro A.G.** ...........................            1,918,669

Retail - Restaurants - 0.7%
     226,922       TelePizza S.A.* ........................            2,154,049

Rubber - Tires - 0.1%
      10,000       Bridgestone Corp.** ....................              227,400

Security Services - 3.2%
      75,036       Prosegur, Companhia de Seguridad S.A ...              887,036
     578,488       Securitas A.B. - Class B** .............            8,992,550

                                                                       9,879,586

Telecommunication Equipment - 4.0%
         740       Alcatel S.A ............................               90,612
      12,455       Alcatel S.A. (ADR) .....................              304,369
      35,341       Nokia Oyj - Class A ....................            4,327,507
      49,940       Nokia Oyj (ADR) - Class A ..............            6,014,649
       1,189       Telefonaktiebolaget L.M. Ericsson - Class B**          28,311
      68,204       Telefonaktiebolaget L.M. Ericsson (ADR)
                     - Class B** ..........................            1,632,633

                                                                      12,398,081

Telecommunication Services - 4.7%
     496,240       Cable & Wireless Optus, Ltd.*,+ ........            1,044,002
     324,380       COLT Telecom Group PLC*,** .............            4,800,659
     142,964       Energis PLC*,** ........................            3,187,369
         280       NTT Data Corp.** .......................            1,392,595
      51,987       Sonera Group Oyj*,+ ....................              934,337
      21,700       STET Hellas Telecommunications
                     S.A. (ADR)* ..........................              702,538
     300,562       Telecom Italia S.p.A ...................            2,564,513

                                                                      14,626,013

Telephone - Integrated - 3.2%
          37       Nippon Telegraph & Telephone Corp.** ...     $        286,037
      36,846       Portugal Telecom S.A ...................            1,689,426
      10,817       Swisscom A.G.*,** ......................            4,528,472
       7,640       Telecom Argentina Stet S.A. (ADR) ......              210,100
      17,830       Telefonica de Argentina S.A. (ADR) .....              498,126
      45,726       Telefonica S.A .........................            2,036,336
       6,267       Telefonica S.A. (ADR) ..................              848,395

                                                                      10,096,892

Transportation - Air Freight - 0%
       4,815       SAS Danmark A/S ........................               54,472

Travel Services - 0.1%
          97       Kuoni Reisen A.G. - Class B** ..........              384,898
- --------------------------------------------------------------------------------
Total Common Stock (cost $219,072,265) ....................          275,296,284
- --------------------------------------------------------------------------------
Preferred Stock - 2.5%
Automotive - Cars and Light Trucks - 1.2%
       1,636       Porsche A.G.** .........................            3,732,637

Computer Software - 0.5%
       2,964       SAP A.G.** .............................            1,415,153

Insurance Brokers - 0.3%
       1,641       Marschollek, Lautenschlaeger und
                     Partner A.G.** .......................              936,011

Telephone - Integrated - 0.5%
      20,540       Telecomunicacoes Brasileiras S.A. (ADR)             1,493,001
- --------------------------------------------------------------------------------
Total Preferred Stock (cost $7,318,045) ...................            7,576,802
- --------------------------------------------------------------------------------
Rights - 0%
      45,726       Telefonica S.A. * (cost $0) ............               40,662
- --------------------------------------------------------------------------------
Warrants - 0%
          75       Muenchener Rueckversicherungs
                     - Gesellschaft A.G. *,** (cost $0) ...                3,490
- --------------------------------------------------------------------------------
U.S. Government Agency - 9.7%
                   Freddie Mac
$ 30,300,000         4.70%, 1/4/99
                     (amortized cost $30,288,133) .........           30,288,133
- --------------------------------------------------------------------------------
Total Investments (total cost $256,678,443) - 100.7% ......          313,205,371
- --------------------------------------------------------------------------------
Liabilities, net of Cash, Receivables and Other Assets - (0.7%)      (2,078,809)
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $    311,126,562
- --------------------------------------------------------------------------------

See Notes to Schedules of Investments.

14  Janus Aspen Series / December 31, 1998
<PAGE>

Summary of Investments by Country, December 31, 1998

Country                       % of Investment Securities          Market Value
- --------------------------------------------------------------------------------
Argentina                                  0.2%                 $        708,225
Australia                                  0.3%                        1,044,002
Austria                                    0.1%                          438,015
Brazil                                     0.5%                        1,493,001
Canada                                     0.5%                        1,673,440
Denmark                                    0.3%                        1,056,671
Finland                                    4.9%                       15,193,148
France                                    10.8%                       33,894,706
Germany                                    9.8%                       30,659,599
Greece                                     0.3%                          902,275
Hong Kong                                  0.6%                        1,746,993
India                                       --                               446
Ireland                                    1.9%                        6,072,597
Italy                                      3.3%                       10,372,474
Japan                                     11.1%                       34,677,466
Mexico                                     0.7%                        2,160,305
Netherlands                                8.8%                       27,558,769
Norway                                     0.2%                          577,253
Portugal                                   0.7%                        2,064,960
Romania                                     --                           118,358
Spain                                      2.9%                        8,958,205
Sweden                                     6.7%                       20,955,592
Switzerland                                6.7%                       21,062,536
United Kingdom                            17.4%                       54,457,669
United States++                           11.3%                       35,358,666
- --------------------------------------------------------------------------------
Total                                    100.0%                 $    313,205,371

++Includes Short-Term Securities (1.6% excluding Short-Term Securities)

Forward Currency Contracts, Open at December 31, 1998

Currency Sold and                  Currency           Currency      Unrealized
Settlement Date                  Units Sold     Value in $ U.S.    Gain/(Loss)
- --------------------------------------------------------------------------------
British Pound 4/7/99             11,220,000         $18,533,196       $282,665
British Pound 5/6/99              4,380,000           7,232,694       (32,237)
British Pound 5/13/99               900,000           1,486,080          2,520
Dutch Guilder 1/21/99             2,000,000           1,065,246       (18,948)
Dutch Guilder 1/22/99            10,500,000           5,592,841       (37,286)
Dutch Guilder 1/26/99             5,000,000           2,663,825          8,742
Dutch Guilder 1/27/99             3,400,000           1,811,498       (40,664)
German Deutschemark
  1/22/99                        10,000,000           6,011,060          2,820
German Deutschemark
  1/25/99                           229,000             137,678          1,718
German Deutschemark
  1/26/99                         1,500,000             901,876       (18,002)
German Deutschemark
  1/27/99                        11,550,000           6,944,862      (160,617)
Japanese Yen 2/12/99          1,060,000,000           9,364,504      (216,009)
Japanese Yen 3/25/99            200,700,000           1,773,170       (76,636)
Japanese Yen 4/7/99             500,000,000           4,417,539      (612,364)
Japanese Yen 4/8/99             129,500,000           1,144,145        (6,183)
Japanese Yen 4/21/99            359,800,000           3,178,920         40,767
Japanese Yen 5/20/99             50,000,000             441,779       (18,409)
Swedish Krona 4/7/99             28,500,000           3,532,824         23,825
Swedish Krona 5/6/99                464,000              57,583          1,969
Swedish Krona 5/13/99               585,000              72,620             50
Swiss Franc 3/25/99                 185,000             135,870            662
Swiss Franc 4/7/99                2,200,000           1,617,766         11,291
Swiss Franc 4/8/99                   50,000              36,770            909
Swiss Franc 5/20/99                 165,000             121,789        (2,827)
- --------------------------------------------------------------------------------
Total                                               $78,276,135     ($862,244)

See Notes to Schedules of Investments.

                                      Janus Aspen Series / December 31, 1998  15
<PAGE>

Janus | Aspen Worldwide Growth Portfolio

[PHOTO]

Helen Young Hayes
portfolio manager

For the 12-month period ended December 31, 1998,  Janus Aspen  Worldwide  Growth
Portfolio returned an impressive 28.92% for the Institutional  Shares and 28.25%
for  the  Retirement   Shares.   In  comparison,   the  Morgan  Stanley  Capital
International World Index gained 24.34%.(1)

Throughout the first half of the year, low interest rates and positive  earnings
reports,  primarily  in the U.S.  and Europe,  provided a positive  backdrop for
global financial markets.  Although Asian markets and economies were much weaker
in comparison,  their weakness helped keep commodity  prices in check,  which in
turn  created a more  favorable  inflationary  environment  with lower  interest
rates.  However, in July,  financial discord in the Far East extended to Russia,
Brazil  and other  emerging  economies,  sending  widespread  shocks  throughout
international stock markets.

In the U.S., the Federal  Reserve  responded to these events with three interest
rate cuts. This not only helped investor  sentiment,  but sparked a trend toward
lower rates in 60 other  countries,  which  contributed to the  stabilization of
equity  markets  worldwide.  Although  global  economic  growth  continued  at a
somewhat slower pace, growth remained moderate here in the U.S.
and, by year-end, the U.S. stock market had set new record highs.

Several  of our U.S.  technology  holdings  helped  lead this  rally,  including
Microsoft and Cisco Systems.  We added to both  positions on market  declines in
the third  quarter then watched them regain their losses to finish the year with
outstanding 115% and 150% returns, respectively. European information technology
(IT) companies also performed well, including Cap Gemini and Getronics.  Despite
their strong  returns,  these two  companies  gave up some of their gains in the
fourth  quarter due to concerns  about a potential  post-year  2000  slowdown in
corporate IT spending.  While we believe IT spending will  increase,  especially
among European corporations and governments, we are keeping a particularly close
eye on the situation.

Other strong U.S. performers included our positions in Time Warner,  Comcast and
Tele-Communications,  Inc.,all  of which  continued  to  benefit  from  optimism
surrounding new value-added services currently being introduced within the cable
industry.  We were also  pleased  with solid  results  from U.S.  pharmaceutical
companies like Warner-Lambert and Bristol-Myers Squibb.

Telecommunications  stocks  were  among  our  strongest  European  holdings  and
continued to gain from the  deregulation  of this  industry.  One of our biggest
winners was Nokia, a Finnish telecommunications equipment maker with outstanding
returns  attributed to huge global demand for cellular  telephony.  Colt Telecom
Group,  a  telecommunication  services  provider  in England and  Germany,  also
returned  impressive results despite taking a blow to its stock during the third
quarter on fears of a recession.  Our confidence in Colt's growth  opportunities
prompted us to take advantage of this decline by adding to our position,  and by
year-end the stock had fully recovered.

In  spite  of  the  Portfolio's  solid  performance,   we  did  experience  some
disappointments.  European financial stocks such as UBS and Bank Austria,  which
we held because of strong business  fundamentals coupled with declining interest
rates and  industry  consolidation,  were  broadly hit by the  financial  crisis
mentioned  earlier.  UBS was  particularly  disappointing.  Despite the positive
benefits from  cost-cutting  and an attractive  private  banking  business,  the
earnings  potential of UBS was impaired by its exposure to Russia's debt debacle
and the subsequent hedge fund meltdown.  Consequently,  we cut this position, as
well as our position in Bank Austria,  at a loss.  However, we chose to maintain
our holdings in these and other European  financial  services companies based on
their positive fundamentals and low valuations.

Also hit by the series of negative  global  events were  economically  sensitive
stocks.  As a result,  Sony and Philips  Electronics,  manufacturers of consumer
electronics,  fell short of our high expectations when demand for their products
weakened.  We subsequently reduced both positions at a loss. Philips' stock also
declined from laggard semiconductor sales, as well as its disappointing wireless
handset business.

Looking ahead, we expect slower global  economic growth to continue.  Meanwhile,
Japan  takes  one step  forward  and two  steps  back in its  attempt  to find a
solution for its banking crisis and economic reform. Nonetheless, we are finding
select   opportunities  here.  Asian  economies  have  stabilized,   but  equity
valuations are still expensive relative to earnings potential.

Currently,  the bulk of our holdings  remains in the U.S. and Europe.  We expect
continued  modest  growth in these  regions,  coupled  with  measures to improve
profitability  and shareholder  value. We also believe Europe's  introduction of
the euro in 1999 will be positive  for its  economy,  helping to  formalize  the
integration of Europe as an economic entity.

In closing,  I would like to thank you for your  continued  investment  in Janus
Aspen Worldwide Growth Portfolio.

Portfolio Asset Mix                   December 31, 1998        December 31, 1997
- --------------------------------------------------------------------------------
Equities                                     90.0%                    97.4%
  Foreign                                    65.8%                    77.8%
Number of Stocks                               156                      205
Top 10 Equities                              25.9%                    21.0%
Cash & Cash Equivalents                      10.0%                     2.6%
- --------------------------------------------------------------------------------
(1) All returns include reinvested dividends.

16  Janus Aspen Series / December 31, 1998
<PAGE>

Average Annual Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 9/13/93)
  1 Year                                                     28.92%
  5 Year                                                     21.32%
  From Inception                                             24.06%
- --------------------------------------------------------------------------------
Morgan Stanley Capital International World Index(2)
  1 Year                                                     24.34%
  5 Year                                                     15.68%
  From Inception Date of Institutional Shares                14.39%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/97)
  1 Year                                                     28.25%
  5 Year (unaudited)                                         20.68%
  From Portfolio Inception (unaudited)                       23.22%
- --------------------------------------------------------------------------------
Returns shown for  Retirement  Shares for periods  prior to their  inception are
derived from the historical  performance of  Institutional  Shares,  adjusted to
reflect the higher operating expenses of Retirement Shares.

Note: Performance of the Retirement  Shares is lower from the performance  shown
      on this graph for the  Institutional  Shares,  based upon the higher  fees
      paid by shareholders investing in this class.

Performance Overview(1)

[GRAPHIC OMITTED]

A graphic comparison of the change in value of a hypothetical $10,000 investment
in Janus Aspen Worldwide Growth Portfolio - Institutional  Shares and the Morgan
Stanley  Capital   International  World  Index.  Janus  Aspen  Worldwide  Growth
Portfolio -  Institutional  Shares is  represented by a shaded area of blue. The
Morgan Stanley Capital International World Index is represented by a solid black
line. The "y" axis reflects the value of the  investment.  The "x" axis reflects
the computation periods from inception, September 13, 1993, through December 31,
1998.  The upper right  quadrant  reflects the ending value of the  hypothetical
investment in Janus Aspen  Worldwide  Growth  Portfolio -  Institutional  Shares
($31,299) as compared to the Morgan Stanley  Capital  International  World Index
($20,843).

Average Annual Total Return 
for the periods ended December 31, 1998 
One Year, 28.92% 
Five Year, 21.32% 
Since 9/13/93,* 24.06%

Janus Aspen Worldwide Growth Portfolio
- - Institutional Shares - $31,299

Morgan Stanley
Capital International
World Index - $20,843

*The Portfolio's inception date.
Source - Lipper Analytical Services, Inc. 1998.

(1)  All returns reflect reinvested  dividends.  The Portfolio's  securities may
     differ significantly from the securities in the Index. Index returns do not
     include  taxes or  dividends  and interest  payments or operating  expenses
     necessary to maintain a portfolio  consisting of the same  securities  that
     are in the Index.  These returns do not reflect the charges and expenses of
     any particular  insurance product or qualified plan.  Investment return and
     principal value will fluctuate so that shares, when redeemed,  may be worth
     more or less than their  original cost.  The adviser  voluntarily  waives a
     portion of the Portfolio's  expenses.  Without such waiver, the Portfolio's
     total returns for each class would have been lower.  Past  performance does
     not guarantee 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.

SCHEDULE OF INVESTMENTS

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Common Stock - 88.7%
Advertising Agencies - 0%
      36,544       WPP Group PLC** ........................     $        221,927

Agricultural Biotechnology - 0.4%
     250,530       Monsanto Co. ...........................           11,900,175

Agricultural Operations - 0.1%
      49,955       Delta and Pine Land Co. ................            1,848,335

Airlines - 0%
      30,101       SAS Norge A.S.A. - Class B .............              252,858

Appliances - 0.9%
   1,536,685       Electrolux A.B. - Class B** ............           26,447,036

Applications Software - 0.5%
     200,335       Intuit, Inc.* ..........................           14,524,287

Audio and Video Products - 0.7%
     279,700       Sony Corp.** ...........................           20,407,803

Automotive - Cars and Light Trucks - 2.2%
     158,957       DaimlerChrysler A.G.*,** ...............           15,699,828
     136,740       DaimlerChrysler A.G. (ADR)*,** .........           13,135,566
     280,000       Honda Motor Co., Ltd.** ................            9,209,497
     521,081       Renault S.A ............................           23,414,097
     131,140       Volvo A.B. - Class B** .................            3,009,304

                                                                      64,468,292

Automotive - Truck Parts and Equipment - 0.7%
     261,702       Valeo S.A.+ ............................           20,632,545

Beverages - Non-Alcoholic - 0.1%
     175,035       Coca-Cola Femsa S.A. (ADR) .............            2,319,214

Beverages - Wine and Spirits - 0.2%
     589,427       Diageo PLC** ...........................     $      6,546,093

Brewery - 0.6%
   1,420,000       Kirin Brewery Co., Ltd.** ..............           18,128,204

Broadcast Services and Programming - 0.3%
      85,910       Fox Entertainment Group, Inc.* .........            2,163,858
     287,695       Grupo Televisa S.A. (GDR)* .............            7,102,470

                                                                       9,266,328

Building and Construction - 0.7%
      92,067       Suez Lyonnaise des Eaux ................           18,921,010

Building Products - Cement and Aggregate - 0.1%
     112,769       Cimpor-Cimentos de Portugal S.A ........            3,599,849

Cable Television - 3.6%
     648,685       Comcast Corp. - Special Class A ........           38,069,701
     147,575       MediaOne Group, Inc.* ..................            6,936,025
   1,083,230       Tele-Communications, Inc. - Class A* ...           59,916,159

                                                                     104,921,885

Cellular Telecommunications - 3.7%
      54,757       Cellular Communications International, Inc.*        3,723,476
   6,554,000       China Telecom, Ltd.* ...................           11,336,429
       1,346       NTT Mobile Communication
                     Network, Inc.** ......................           55,488,370
      88,141       Orange PLC*,** .........................            1,011,877
      68,801       Panafon Hellenic Telecom S.A.*,+ .......            1,842,610
   2,171,558       Telecom Italia Mobile S.p.A. ...........           16,071,104
   1,015,915       Vodafone Group PLC** ...................           16,530,922

                                                                     106,004,788

See Notes to Schedules of Investments.

                                      Janus Aspen Series / December 31, 1998  17
<PAGE>
Janus | Aspen Worldwide Growth Portfolio

SCHEDULES OF INVESTMENTS (continued)

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Chemicals - Diversified - 0.7%
     185,559       Akzo Nobel N.V.** ......................     $      8,453,970
     272,486       Hoechst A.G.** .........................           11,305,013
      10,316       Solutia, Inc. ..........................              230,821

                                                                      19,989,804

Commercial Banks - 0.8%
     402,824       Argentaria, Caja Postal y Banco
                     Hipotecario de Espana S.A. ...........           10,447,911
     575,220       Banco Central Hispanoamericano .........            6,840,544
      28,364       Bayerische Vereinsbank A.G.** ..........            2,222,424
     387,590       Den Norske Bank A.S.A ..................            1,337,962
      16,778       Kapital Holdings .......................              830,418

                                                                      21,679,259

Computer Services - 4.5%
      65,614       Atos S.A.* .............................           15,692,835
     249,134       Cap Gemini S.A.+ .......................           40,005,886
     565,294       Getronics N.V.** .......................           28,013,661
   3,543,065       Logica PLC** ...........................           30,830,578
   1,239,103       Misys PLC** ............................            9,112,353
     134,324       WM-Data A.B. - Class B** ...............            5,733,868

                                                                     129,389,181

Computer Software - 3.3%
     195,179       JBA Holdings PLC** .....................              617,003
     569,160       Microsoft Corp.* .......................           78,935,378
     350,889       Tieto Corp. - Class B ..................           15,731,238

                                                                      95,283,619

Computers - Integrated Systems - 1.1%
      77,453       Equant N.V.* ...........................            5,392,307
     152,665       Equant N.V. - New York Shares* .........           10,352,595
     849,300       Fujitsu, Ltd.** ........................           11,331,870
     376,593       SEMA Group PLC** .......................            3,715,590

                                                                      30,792,362

Computers - Memory Devices - 0.1%
      30,175       EMC Corp.* .............................            2,564,875

Computers - Micro - 0.7%
      78,950       Dell Computer Corp.* ...................            5,778,153
      13,795       IBM Corp. ..............................            2,548,626
     136,035       Sun Microsystems, Inc.* ................           11,647,997

                                                                      19,974,776

Cosmetics and Toiletries - 1.7%
     365,105       Estee Lauder Companies, Inc. - Class A .           31,216,477
     843,000       Kao Corp.** ............................           19,057,754

                                                                      50,274,231

Cruise Lines - 0.2%
      82,855       Carnival Corp. .........................            3,977,040
     566,008       NCL Holdings A.S.A.* ...................            1,337,244

                                                                       5,314,284

Diversified Operations - 9.5%
   3,210,349       Hays PLC** .............................     $     28,309,290
     218,159       Lagardere S.C.A ........................            9,275,454
   7,412,950       Rentokil Initial PLC** .................           55,972,487
   3,319,572       Siebe PLC** ............................           13,034,517
   1,421,566       Tomkins PLC** ..........................            6,764,472
   1,232,230       Tyco International, Ltd. ...............           92,956,351
     141,239       Unilever N.V.** ........................           12,079,313
      61,794       VEBA A.G.** ............................            3,699,051
     180,035       Vivendi ................................           46,732,971
   1,166,485       Williams PLC** .........................            6,676,340

                                                                     275,500,246

Drug Delivery Systems - 0.6%
     257,905       Elan Corp. PLC (ADR)* ..................           17,940,517

Electronic Components - 1.1%
      57,681       Electrocomponents PLC** ................              380,999
     230,407       Koninklijke Philips Electronics N.V.** .           15,469,589
     243,258       Philips Electronics N.V ................
                     - New York Shares** ..................           16,465,526

                                                                      32,316,114

Electronic Components - Semiconductors - 0.1%
      20,500       Rohm Co., Ltd.** .......................            1,870,136

Finance - Other Services - 0%
      35,030       Newcourt Credit Group, Inc.
                     - New York Shares ....................            1,223,861

Food - Catering - 0.8%
   1,902,740       Compass Group PLC** ....................           21,748,887

Food - Diversified - 0.9%
      79,858       Danone .................................           22,873,723
     390,024       Raisio Group PLC .......................            4,236,637

                                                                      27,110,360

Food - Retail - 0.5%
     425,857       Koninklijke Ahold N.V.** ...............           15,748,377

Hotels and Motels - 0%
       5,260       EIH, Ltd.+ .............................               27,615

Human Resources - 0.7%
      11,260       Adecco S.A.** ..........................            5,140,235
   1,703,956       Capita Group PLC** .....................           15,706,123

                                                                      20,846,358

Internet Software - 0.1%
      13,555       America Online, Inc.* ..................            1,962,086

Investment Management and Advisory Services - 0.2%
     709,883       Amvescap PLC** .........................            5,492,127

Life and Health Insurance - 0.1%
       2,575       Schweizerische Lebensversicherungs-und
                     Rentenanstalt** ......................            1,912,293

Machinery - General Industrial - 2.7%
     675,459       Mannesmann A.G.** ......................           77,460,662

See Notes to Schedules of Investments.

18  Janus Aspen Series / December 31, 1998
<PAGE>

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Medical - Drugs - 10.9%
     228,510       American Home Products Corp. ...........     $     12,867,969
     856,173       Astra A.B. - Class A** .................           17,481,451
     137,300       Bristol-Myers Squibb Co. ...............           18,372,456
     534,160       Glaxo Wellcome PLC** ...................           18,441,249
     107,143       Merck KGaA** ...........................            4,824,740
      13,632       Novartis A.G.** ........................           26,797,876
     152,335       Pfizer, Inc. ...........................           19,108,522
      34,497       Pharmacia & Upjohn, Inc.** .............            1,932,214
     657,705       Pharmacia & Upjohn, Inc. ...............           37,242,546
     501,097       Rhone-Poulenc S.A ......................           25,799,372
       2,271       Roche Holding A.G.** ...................           27,712,020
      79,100       Sanofi S.A .............................           13,027,550
     389,348       SmithKline Beecham PLC** ...............            5,403,856
     164,725       SmithKline Beecham PLC (ADR)** .........           11,448,387
     949,000       Takeda Chemical Industries** ...........           36,598,174
     499,023       Warner-Lambert Co. .....................           37,520,292

                                                                     314,578,674

Medical Products - 0%
      36,108       Ortivus A.B.*,** .......................              262,829

Metal Processors and Fabricators - 1.0%
     758,119       Assa Abloy A.B. - Class B** ............           28,994,593

Money Center Banks - 3.3%
   2,029,329       Banca Commerciale Italiana .............           14,096,695
   8,776,999       Banca di Roma* .........................           14,898,983
     801,793       Banco Bilbao Vizcaya S.A ...............           12,732,145
      69,981       Bank Austria A.G .......................            3,560,546
   1,858,970       Lloyds TSB Group PLC** .................           26,475,673
     619,139       Skandinaviska Enskilda Banken - Class A**           6,530,888
      43,909       UBS A.G.** .............................           13,490,965
      38,197       Unidanmark A/S - Class A ...............            3,450,986

                                                                      95,236,881

Mortgage Banks - 0.6%
     212,930       Deutsche Pfandbrief-und
                     Hypothekenbank A.G.** ................           18,665,454

Multi-Line Insurance - 1.6%
      62,784       Aegon N.V.** ...........................            7,714,732
      10,650       Baloise Holding Ltd. - Class R** .......           11,049,471
      11,730       ERGO Versicherungs Gruppe A.G.** .......            1,936,777
     216,204       Sampo Insurance Co. PLC - Class A ......            8,241,159
      23,837       Zurich Allied A.G.** ...................           17,650,198

                                                                      46,592,337

Multimedia - 2.3%
   1,065,770       Time Warner, Inc. ......................           66,144,351

Networking Products - 4.9%
   1,537,395       Cisco Systems, Inc.* ...................          142,689,473

Office Furnishings - 0.1%
     154,723       Koninklijke Ahrend N.V.** ..............            3,536,916

Publishing - Periodicals - 1.7%
     230,449       Wolters Kluwer N.V.** ..................           49,339,792

Radio - 0.6%
     326,415       Clear Channel Communications, Inc.* ....           17,789,618

Recycling - 0.2%
     165,718       Tomra Systems A.S.A ....................            5,437,824

Retail - Diversified - 0.7%
     271,000       Ito-Yokado Co., Ltd.** .................     $     18,980,180

Retail - Restaurants - 0.7%
   2,223,283       TelePizza S.A.* ........................           21,104,439

Rubber - Tires - 0.1%
      91,000       Bridgestone Corp.** ....................            2,069,344

Security Services - 1.0%
   1,938,540       Securitas A.B. - Class B** .............           30,134,449

Telecommunication Equipment - 4.6%
       6,559       Alcatel S.A ............................              803,142
     117,775       Alcatel S.A. (ADR) .....................            2,878,127
     528,651       Nokia Oyj - Class A ....................           64,733,342
     424,275       Nokia Oyj (ADR) - Class A ..............           51,098,620
     163,980       Northern Telecom, Ltd. .................            8,219,497
      10,698       Telefonaktiebolaget L.M. Ericsson
                     - Class B** ..........................              254,729
     228,972       Telefonaktiebolaget L.M. Ericsson (ADR)
                     - Class B** ..........................            5,481,017

                                                                     133,468,474

Telecommunication Services - 3.6%
     851,483       COLT Telecom Group PLC*,** .............           12,601,516
   1,294,866       Energis PLC*,** ........................           28,868,917
       1,625       NTT Data Corp.** .......................            8,082,025
      20,510       Qwest Communications International, Inc.*           1,025,500
   6,393,195       Telecom Italia S.p.A ...................           54,549,258

                                                                     105,127,216

Telephone - Integrated - 2.9%
         389       Nippon Telegraph & Telephone Corp.** ...            3,007,253
     148,628       Portugal Telecom S.A ...................            6,814,744
      98,211       Swisscom A.G.*,** ......................           41,115,446
      71,880       Telecom Argentina Stet S.A. (ADR) ......            1,976,700
     190,090       Telefonica de Argentina S.A. (ADR) .....            5,310,639
     272,151       Telefonica S.A .........................           12,119,817
     104,627       Telefonica S.A. (ADR) ..................           14,163,812

                                                                      84,508,411

Telephone - Long Distance - 1.7%
     668,455       MCI WorldCom, Inc.* ....................           47,961,646

Transportation - Air Freight - 0%
      48,956       SAS Danmark A/S ........................              553,840

Travel Services - 0.2%
       1,323       Kuoni Reisen A.G. - Class B** ..........            5,249,687

Wireless Telecommunications - 0.8%
     332,800       AirTouch Communications, Inc.* .........           24,003,200
- --------------------------------------------------------------------------------
Total Common Stock (cost $1,783,557,695) ..................        2,569,262,287
- --------------------------------------------------------------------------------
Preferred Stock - 1.3%
Automotive - Cars and Light Trucks - 0.4%
       5,142       Porsche A.G.** .........................           11,731,796

Computer Software - 0.4%
      26,665       SAP A.G.** .............................           12,731,126

Telephone - Integrated - 0.5%
     187,475       Telecomunicacoes Brasileiras S.A. (ADR)            13,627,089
- --------------------------------------------------------------------------------
Total Preferred Stock (cost $47,864,905) ..................           38,090,011
- --------------------------------------------------------------------------------

See Notes to Schedules of Investments.

                                      Janus Aspen Series / December 31, 1998  19
<PAGE>

Janus | Aspen Worldwide Growth Portfolio

SCHEDULE OF INVESTMENTS (continued)

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Rights - 0%
     272,151       Telefonica S.A.* (cost $0) .............     $        242,012
- --------------------------------------------------------------------------------
Warrants - 0%
         718       Muenchener Rueckversicherungs
                     - Gesellschaft A.G.*,** (cost $0) ....               33,410
- --------------------------------------------------------------------------------
Short-Term Corporate Notes - 3.5%
$ 50,000,000       Ford Motor Credit Corp.
                     5.30%, 1/12/99 .......................           49,919,028
  50,000,000       JP Morgan Securities
                     5.25%, 2/8/99 ........................           49,722,917
- --------------------------------------------------------------------------------
Total Short-Term Corporate Notes
                   (amortized cost $99,641,945) ...........           99,641,945
- --------------------------------------------------------------------------------
U.S. Government Agencies - 6.8%
                   Fannie Mae
  50,000,000         5.45%, 1/6/99 ........................           49,965,208
                   Federal Home Loan Bank System
  25,000,000         5.45%, 1/19/99 .......................           24,939,125
                   Freddie Mac:
  23,500,000         4.70%, 1/4/99 ........................           23,490,796
  50,000,000         5.45%, 1/22/99 .......................           49,853,875
  50,000,000         5.45%, 2/23/99 .......................           49,638,569
- --------------------------------------------------------------------------------
Total U.S. Government Agencies
  (amortized cost $197,887,573) ...........................          197,887,573
- --------------------------------------------------------------------------------
Total Investments (total cost $2,128,952,118) - 100.3% ....        2,905,157,238
- --------------------------------------------------------------------------------
Liabilities, net of Cash, Receivables and Other Assets - (0.3%)      (8,945,326)
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $  2,896,211,912
- --------------------------------------------------------------------------------

See Notes to Schedules of Investments.

20  Janus Aspen Series / December 31, 1998
<PAGE>

Summary of Investments by Country, December 31, 1998

Country                       % of Investment Securities          Market Value
- --------------------------------------------------------------------------------
Argentina                                  0.2%                 $      7,287,339
Austria                                    0.1%                        3,560,546
Bermuda                                    3.2%                       92,956,351
Brazil                                     0.5%                       13,627,089
Canada                                     0.3%                        9,443,358
Denmark                                    0.2%                        4,835,245
Finland                                    5.0%                      144,040,997
France                                     8.3%                      240,056,712
Germany                                    6.0%                      173,445,846
Greece                                     0.1%                        1,842,610
Hong Kong                                  0.4%                       11,336,429
India                                       --                            27,615
Ireland                                    0.6%                       17,940,517
Italy                                      3.4%                       99,616,039
Japan                                      7.0%                      204,230,610
Mexico                                     0.3%                        9,421,684
Netherlands                                5.9%                      172,566,778
Norway                                     0.3%                        8,365,888
Portugal                                   0.4%                       10,414,593
Spain                                      2.7%                       77,650,682
Sweden                                     4.3%                      126,262,375
Switzerland                                5.2%                      150,118,190
United Kingdom                            11.2%                      325,911,185
United States++                           34.4%                    1,000,198,560
- --------------------------------------------------------------------------------
Total                                    100.0%                 $  2,905,157,238

++Includes Short-Term Securities (24.2% excluding Short-Term Securities)

Forward Currency Contracts, Open at December 31, 1998

Currency Sold and                  Currency            Currency     Unrealized
Settlement Date                  Units Sold     Value in $ U.S.    Gain/(Loss)
- --------------------------------------------------------------------------------
British Pound 4/7/99             49,700,000         $82,094,460     $1,318,725
British Pound 5/6/99             45,300,000          74,803,890      (333,408)
British Pound 5/13/99             9,000,000          14,860,800         25,200
Dutch Guilder 1/21/99            17,000,000           9,054,594      (161,055)
Dutch Guilder 1/22/99            21,000,000          11,185,682       (74,571)
Dutch Guilder 1/26/99            80,000,000          42,621,204        139,879
Dutch Guilder 1/27/99            18,300,000           9,750,120      (218,870)
German Deutschemark
  1/22/99                        25,000,000          15,027,651          7,049
German Deutschemark
  1/25/99                        19,600,000          11,783,803        147,047
German Deutschemark
  1/26/99                        13,000,000           7,816,258      (156,019)
German Deutschemark
  1/27/99                       108,800,000          65,419,999    (1,515,504)
Japanese Yen 2/12/99          7,800,000,000          68,908,611    (1,559,462)
Japanese Yen 3/25/99            950,000,000           8,393,183      (362,752)
Japanese Yen 4/8/99           1,887,000,000          16,671,820       (90,098)
Japanese Yen 4/21/99          4,363,000,000          38,548,158        494,348
Japanese Yen 5/20/99          3,000,000,000          26,506,708    (1,104,506)
Swedish Krona 3/25/99            22,000,000           2,725,505         40,052
Swedish Krona 4/7/99            111,000,000          13,759,421         91,400
Swedish Krona 4/8/99             25,000,000           3,099,083        147,670
Swedish Krona 5/6/99             23,650,000           2,935,008        100,351
Swiss Franc 3/25/99                 500,000             367,215          1,789
Swiss Franc 4/7/99               10,300,000           7,574,086       (78,905)
Swiss Franc 4/8/99                6,000,000           4,412,414        109,063
- --------------------------------------------------------------------------------
Total                                              $538,319,673   ($3,032,577)

See Notes to Schedules of Investments.

                                      Janus Aspen Series / December 31, 1998  21
<PAGE>

Janus | Aspen Balanced Portfolio

[PHOTO]
Blaine P. Rollins
portfolio manager

For the fiscal year ended  December 31,  1998,  Janus Aspen  Balanced  Portfolio
provided shareholders with a total return of 34.28% for its Institutional Shares
and 33.59% for its Retirement Shares. These gains were well ahead of the S&P 500
Index, which appreciated  28.74%,  and the Lehman Brothers  Government/Corporate
Bond Index, which returned 9.47%.(1)

Following  a strong  first  half,  a series  of  events  took its toll on global
economic growth. The Russian debt crisis,  breakdowns in several emerging market
economies and Japan's struggle toward  financial reform all negatively  impacted
the  financial  markets,  sparking  fears of a possible  recession.  In the end,
however,  economic growth  continued at a decent pace here in the U.S., aided by
Federal Reserve interest rate cuts.  Meanwhile,  economies in other parts of the
world maintained much lower growth levels.

Although the worldwide  economic  slowdown  caused  earnings among several large
multinational  companies to suffer,  certain niche  businesses  still managed to
find  significant  growth  particularly  technology  companies.  In  fact,  near
year-end,  technology was the U.S. market's  strongest growth area, a clear sign
that  high-tech  corporate  spending had remained  virtually  unaffected  by the
recent turn of events.

Several of our technology  holdings not only participated in this rally, but led
it,   including   America  Online  (AOL)  -  one  of  our   strongest-performing
fixed-income  instruments (a convertible  bond).  Already the premier name among
Internet  service  providers,  this  company  continues to amaze us. Its planned
acquisition  of  Netscape  Communications,  a  company  that  develops  Internet
browsers,  will provide AOL with yet another way to get its name and services in
front of people.

Cable is another part of the market that  continues  to take off. Our  long-time
interest in the new  value-added  services  under  development  at many of these
companies  rewarded  us in the form of high  returns  for Time  Warner  (via the
Houston Industries convertible preferred stocks), Tele-Communications, Inc. (via
the TCI Pacific Communications convertible preferred stocks), and Comcast. Among
the services coming down the pike are digital cable, telephony,  video on demand
and  high-speed  Internet  access,  which should  provide these  companies  with
additional  revenue  streams  and a burst of free cash flow  during the next few
years.

Our biggest home run among the Portfolio's cable positions was Time Warner,  and
this company  continues to hit on every other  cylinder  across its portfolio of
businesses.  New titles from  existing  artists  have turned its music  business
around.  Meanwhile, TV advertising is in high demand on Time Warner's WB Network
- - currently the eyeball magnet for viewers in their  mid-teens to early 20s. Add
to that a thriving TV syndication business, which includes hits like "Seinfeld,"
"Friends"  and "ER," and it's no wonder Time Warner  remains one of our favorite
companies.

Another  compelling area is in the Hispanic  segment of the broadcast  market in
which  advertising  rates are growing at twice the rate of all ad spending.  Our
holdings in this niche include Univision Communications and Heftel Broadcasting.
And although  both were bruised by fears of a possible  recession,  our optimism
convinced us to add to our holdings.

Even  though  market  downturns  can  present  buying  opportunities,  they also
occasionally  lead  to  disappointments,  as  was  the  case  with  a few of our
financial  services  stocks.  Damaged  by  credit  issues  related  to  economic
deterioration in several emerging  markets,  Household  International and Morgan
Stanley  Dean Witter & Co.  declined to a point  beyond my comfort  zone,  and I
liquidated  these  stocks  from  the  Portfolio  at a  loss.  But not all of our
financial services stocks let us down.  Charles Schwab,  U.S. Trust, Bank of New
York and Northern Trust all benefited from thriving asset management businesses.

Another disappointment was Parametric Technology. This company took a hit to its
earnings when  management  shifted its  attention  away from  Parametric's  core
business  during a new-product  rollout.  We sold this position,  but not before
taking a loss on it.

Looking ahead,  near-term surges in economic growth don't seem likely.  However,
the global slowing has caused commodity prices to drop and subsequently promoted
a worldwide trend toward lower interest rates. In this  environment,  we believe
the financial markets should continue to experience moderate growth.

In closing,  I'd like to thank shareholders for their continued  investment.  We
appreciate this show of confidence and assure you that achieving the success you
desire and deserve is our top priority.

Portfolio Asset Mix                   December 31, 1998        December 31, 1997
- --------------------------------------------------------------------------------
Equities                                     41.1%                    47.8%
Number of Stocks                                52                       71
Top 10 Equities/Preferred                    32.1%                    18.8%
Fixed-Income Securities                         45                       60
  U.S. Treasury Notes/Bonds                   6.8%                    18.9%
  Investment-Grade
    Corporate Bonds                           9.5%                     8.6%
  High-Yield Corporate Bonds                 13.6%                     4.3%
  Foreign Corporate Bonds                      --                      0.8%
Preferred Stock                              19.2%                     8.3%
Cash & Cash Equivalents                       9.8%                    11.3%
- --------------------------------------------------------------------------------
(1) All returns include reinvested dividends.

22 Janus Aspen Series / December 31, 1998
<PAGE>

Average Annual Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 9/13/93)
  1 Year                                                     34.28%
  5 Year                                                     19.11%
  From Inception                                             19.53%
- --------------------------------------------------------------------------------
Lehman Brothers Govt./Corp. Bond Index
  1 Year                                                      9.47%
  5 Year                                                      7.30%
  From Inception Date of Institutional Shares                 6.90%
- --------------------------------------------------------------------------------
S&P 500 Index
  1 Year                                                     28.74%
  5 Year                                                     24.08%
  From Inception Date of Institutional Shares                23.06%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/97)
  1 Year                                                     33.59%
  5 Year (unaudited)                                         18.57%
  From Portfolio Inception (unaudited)                       18.73%
- --------------------------------------------------------------------------------
Returns shown for  Retirement  Shares for periods  prior to their  inception are
derived from the historical  performance of  Institutional  Shares,  adjusted to
reflect the higher operating expenses of Retirement Shares.

Note: Performance of the Retirement  Shares is lower from the performance  shown
      on this graph for the  Institutional  Shares,  based upon the higher  fees
      paid by shareholders investing in this class.

Performance Overview(1)

[GRAPHIC OMITTED]

A graphic comparison of the change in value of a hypothetical $10,000 investment
in Janus Aspen Balanced  Portfolio - Institutional  Shares,  the Lehman Brothers
Govt./Corp.  Bond Index and the S&P 500 Index.  Janus Aspen Balanced Portfolio -
Institutional  Shares  is  represented  by a  shaded  area of blue.  The  Lehman
Brothers  Govt./Corp.  Bond Index is  represented by a solid black line. The S&P
500 Index is  represented  by a solid gray line. The "y" axis reflects the value
of the investment. The "x" axis reflects the computation periods from inception,
September 13, 1993, through December 31, 1998. The upper right quadrant reflects
the  ending  value  of the  hypothetical  investment  in  Janus  Aspen  Balanced
Portfolio -  Institutional  Shares  ($25,699) as compared to the Lehman Brothers
Govt./Corp. Bond Index ($14,233) and the S&P 500 Index ($29,978).

Average  Annual Total Return for the periods  ended  December 31, 1998 One Year,
34.28% Five Year, 19.11% Since 9/13/93,* 19.53%

Janus Aspen Balanced Portfolio
- - Institutional Shares - $25,699

Lehman Brothers Govt./Corp. Bond Index  - $14,233

S&P 500 Index - $29,978

*The Portfolio's inception date.
Source - Lipper Analytical Services, Inc. 1998.

(1)  All returns reflect reinvested  dividends.  The Portfolio's  securities may
     differ significantly from the securities in the Index. Index returns do not
     include  taxes or  dividends  and interest  payments or operating  expenses
     necessary to maintain a portfolio  consisting of the same  securities  that
     are in the Index.  These returns do not reflect the charges and expenses of
     any particular  insurance product or qualified plan.  Investment return and
     principal value will fluctuate so that shares, when redeemed,  may be worth
     more or less than their  original cost.  The adviser  voluntarily  waives a
     portion of the Portfolio's  expenses.  Without such waiver, the Portfolio's
     total returns for each class would have been lower.  Past  performance does
     not guarantee future results.

SCHEDULE OF INVESTMENTS

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Common Stock - 41.1%
Airlines - 0.3%
      76,025       Ryanair Holdings PLC (ADR)* ............     $      2,869,944

Cable Television - 3.0%
     460,570       Comcast Corp. - Special Class A ........           27,029,702

Chemicals - Diversified - 0.1%
      16,510       Solutia, Inc. ..........................              369,411

Circuits - 2.9%
     135,980       Linear Technology Corp. ................           12,178,709
     249,740       Maxim Integrated Products, Inc.* .......           10,910,516
      90,800       SIPEX Corp.* ...........................            3,189,350

                                                                      26,278,575

Commercial Banks - 1.2%
      43,725       Firstar Corp. ..........................            4,077,356
       5,480       M & T Bank Corp. .......................            2,843,778
      47,180       U.S. Trust Corp. .......................            3,585,680

                                                                      10,506,814

Computer Software - 3.0%
     127,180       Microsoft Corp.* .......................           17,638,276
     193,850       Wind River Systems, Inc.* ..............            9,110,950

                                                                      26,749,226

Computers - Integrated Systems - 0.6%
     188,285       Cadence Design Systems, Inc.* ..........            5,601,479

Computers - Micro - 4.0%
     490,970       Dell Computer Corp.* ...................           35,932,867

Cruise Lines - 2.0%
     160,780       Carnival Corp. .........................     $      7,717,440
     282,515       Royal Caribbean Cruises, Ltd. ..........           10,453,055

                                                                      18,170,495

Electronic Components - Semiconductors - 0.6%
      64,515       Texas Instruments, Inc. ................            5,520,065

Electronic Safety Devices - 0.1%
      33,850       Pittway Corp. - Class A ................            1,119,166

Finance - Investment Bankers/Brokers - 2.7%
     431,620       Charles Schwab Corp. ...................           24,251,649

Finance - Mortgage Loan Banker - 0.7%
      80,120       Fannie Mae .............................            5,928,880

Finance - Other Services - 1.0%
      34,825       HealthCare Financial Partners, Inc.* ...            1,388,647
     131,890       Newcourt Credit Group, Inc. ............            4,593,998
      85,765       Newcourt Credit Group, Inc.
                     - New York Shares ....................            2,996,415

                                                                       8,979,060

Human Resources - 1.3%
     192,380       Robert Half International, Inc.* .......            8,596,981
     145,205       Romac International, Inc.* .............            3,230,811

                                                                      11,827,792

Instruments - Scientific - 1.3%
     329,850       Dionex Corp.* ..........................           12,080,756

Internet Software - 0.3%
      16,400       America Online, Inc.* ..................            2,373,900

See Notes to Schedules of Investments.

                                     Janus Aspen Series / December 31, 1998   23
<PAGE>

Janus | Aspen Balanced Portfolio

SCHEDULE OF INVESTMENTS (continued)

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Medical - Drugs - 2.8%
      36,820       Pfizer, Inc. ...........................     $      4,618,609
     127,620       Pharmacia & Upjohn, Inc. ...............            7,226,483
      66,740       Schering-Plough Corp. ..................            3,687,385
     128,600       Warner-Lambert Co. .....................            9,669,113

                                                                      25,201,590

Medical Instruments - 0.5%
      65,305       Medtronic, Inc. ........................            4,848,896

Money Center Banks - 1.6%
     354,720       Bank of New York Co., Inc. .............           14,277,480

Multimedia - 0.8%
     197,130       Meredith Corp. .........................            7,466,299

Music/Clubs - 0.2%
      65,230       Steinway Musical Instruments, Inc.* ....            1,695,980

Networking Products - 2.3%
     223,613       Cisco Systems, Inc.* ...................           20,754,082

Optical Supplies - 0.4%
      51,000       Allergan, Inc. .........................            3,302,250

Radio - 2.0%
     149,110       Heftel Broadcasting Corp. - Class A* ...            7,343,668
     381,530       Infinity Broadcasting Corp. - Class A* .           10,444,384

                                                                      17,788,052

Retail - Discount - 1.0%
     124,775       Costco Companies, Inc.* ................            9,007,195

Retail - Internet - 0.7%
      19,925       Amazon.com, Inc.* ......................            6,400,906

Retail - Regional Department Stores - 0.9%
     132,965       Fred Meyer, Inc.* ......................            8,011,141

Schools - 0.3%
      76,860       Apollo Group, Inc. - Class A* ..........            2,603,632

Super-Regional Banks - 0.5%
      56,490       Northern Trust Corp. ...................            4,932,283

Telecommunication Equipment - 1.0%
      75,545       Nokia Oyj (ADR) - Class A ..............            9,098,451

Television - 1.0%
     253,803       Univision Communications, Inc. - Class A*           9,184,496
- --------------------------------------------------------------------------------
Total Common Stock (cost $240,347,848) ....................          370,162,514
- --------------------------------------------------------------------------------
Corporate Bonds - 23.1%
Advertising Services - 0.4%
$  2,950,000       AKI, Inc., 10.50%
                     senior notes, due 7/1/08+ ............            2,806,187
     377,000       R.H. Donnelly, Inc., 9.125%
                     senior subordinated notes, due 6/1/08               394,436

                                                                       3,200,623

Brewery - 0.6%
   5,350,000       Anheuser-Busch Companies, Inc., 5.65%
                     notes, due 9/15/08 ...................            5,450,312

Cable Television - 7.1%
                   Adelphia Communications Corp.:
$ 10,145,000         9.25%, senior notes, due 10/1/02 .....     $     10,741,019
   9,230,000         8.375%, senior notes, due 2/1/08 .....            9,553,050
   5,140,000       Classic Cable, Inc., 9.875%
                     senior subordinated notes, due 8/1/08             5,345,600
   6,000,000       FrontierVision, 11.00%
                     senior subordinated notes, due 10/15/06           6,637,500
   6,845,000       Galaxy Telecom, L.P., 12.375%
                     senior subordinated notes, due 10/1/05            7,597,950
  11,205,000       Jones Intercable, Inc., 7.625%
                     senior notes, due 4/15/08 ............           11,737,238
   3,000,000       Lenfest Communications, Inc., 7.625%
                     senior notes, due 2/15/08 ............            3,116,250
   6,000,000       Mediacom L.L.C., 8.50%
                     senior notes, due 4/15/08 ............            6,127,500
   2,505,000       Rifkin Acquisition Partners, L.P., 11.125%
                     senior subordinated notes, due 1/15/06            2,739,844

                                                                      63,595,951

Casino Hotels - 0.3%
                   Station Casinos, Inc.:
   1,242,000         9.625%, senior subordinated notes,
                     due 6/1/03 ...........................            1,287,022
   1,222,000         10.125%, senior subordinated notes,
                     due 3/15/06 ..........................            1,276,990

                                                                       2,564,012

Computer Software - 1.4%
   4,353,000       Aspen Technology, Inc., 5.25%
                     subordinated debenture, due 6/15/05+ .            3,057,983
   8,500,000       Wind River Systems, Inc., 5.00%
                     convertible subordinated notes,
                     due 8/1/02 ...........................            9,828,125

                                                                      12,886,108

Computers - Mainframe - 0.2%
   2,000,000       IBM Corp., 6.375%
                     notes, due 6/15/00 ...................            2,032,500

Computers - Memory Devices - 0.7%
   4,000,000       VERITAS Software Corp., 5.25%
                     convertible subordinated notes,
                     due 11/1/04 ..........................            6,320,000

Computers - Micro - 0.9%
   7,900,000       Dell Computer Corp., 6.55%
                     senior notes, due 4/15/08 ............            8,196,250

Cosmetics and Toiletries - 0.5%
   4,000,000       Procter and Gamble Co., 5.25%
                     notes, due 9/15/03 ...................            4,030,000

Cruise Lines - 0.1%
   1,300,000       Royal Caribbean Cruises, Ltd., 7.00%
                     senior notes, due 10/15/07 ...........            1,304,875

Distribution and Wholesale - 0.3%
   3,000,000       Aviation Sales Co., 8.125%
                     company guaranteed notes, due 2/15/08             2,970,000

Diversified Financial Services - 0.2%
   2,000,000       Associates Corp. N.A. 6.75%
                     senior notes, due 7/15/01 ............            2,062,500

See Notes to Schedules of Investments.

24 Janus Aspen Series / December 31, 1998
<PAGE>

Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Drug Delivery Systems - 0.9%
$  5,765,000       ALZA Corp., 5.00%
                     convertible subordinated debentures,
                     due 5/1/06 ...........................     $      8,287,187

Fiber Optics - 0.3%
   2,395,000       Metromedia Fiber Network, Inc., 10.00%
                     senior notes, due 11/15/08+ ..........            2,475,831

Food - Canned - 0.5%
   4,500,000       Campbell Soup Co., 4.75%
                     notes, due 10/1/03 ...................            4,426,875

Food - Retail - 0.1%
     631,000       Marsh Supermarkets, Inc., 8.875%
                     company guaranteed notes, due 8/1/07 .              660,184

Hotels and Motels - 0.2%
   1,882,000       Hard Rock Hotel, Inc., 9.25%
                     senior subordinated notes, due 4/1/05             1,882,000

Internet Software - 1.5%
   1,990,000       America Online, Inc., 4.00%
                     convertible subordinated notes,
                     due 11/15/02 .........................           11,181,312

   2,280,000       Exodus Communications, Inc., 11.25%
                     senior notes, due 7/1/08 .............            2,291,400

                                                                      13,472,712

Medical Nursing Home - 0.2%
   1,884,000       HMH Properties, Inc., 7.875%
                     company guaranteed notes, due 8/1/08 .            1,834,545

Multimedia - 1.6%
   8,000,000       Time Warner, Inc., 8.11%
                     notes, due 8/15/06 ...................            9,100,000
                   Walt Disney Co. (The):
   2,000,000         6.375%, senior notes, due 3/30/01 ....            2,055,000
   2,500,000         6.75%, senior notes, due 3/30/06 .....            2,706,250

                                                                      13,861,250

Retail - Building Products - 0.9%
   3,185,000       Home Depot, Inc., 3.25%
                     convertible subordinated notes,
                     due 10/1/01 ..........................            8,368,587

Retail - Diversified - 1.1%
  10,000,000       Falcon Holdings Group L.P., 8.375%
                     debentures, due 4/15/10 ..............           10,275,000

Retail - Music Store - 0.7%
   6,220,000       MTS, Inc., 9.375%
                     senior subordinated notes, due 5/1/05             5,940,100

Retail - Regional Department Stores - 0.6%
   5,000,000       Fred Meyer, Inc., 7.45%
                     company guaranteed notes, due 3/1/08 .            5,400,000

Telecommunication Services - 1.8%
   2,500,000       Global Crossing Holding, Ltd., 9.625%
                     company guaranteed notes, due 5/15/08             2,650,000
  11,500,000       Level 3 Communications, Inc., 9.125%
                     senior notes, due 5/1/08 .............           11,413,750
   1,570,000       Qwest Communications International, Inc.,
                     10.875%, senior notes, due 4/1/07 ....            1,807,462

                                                                      15,871,212
- --------------------------------------------------------------------------------
Total Corporate Bonds (cost $190,928,392) .................          207,368,614
- --------------------------------------------------------------------------------
Preferred Stock - 19.2%
Cable Television - 5.4%
     275,233       MediaOne Group, Inc., convertible, 4.50%     $     26,147,135
      79,983       TCI Pacific Communications, Inc. .......
                     - Series A, convertible, 5.00% .......           22,505,217

                                                                      48,652,352

Cruise Lines - 3.6%
     282,652       Royal Caribbean Cruises, Ltd.,
                     convertible, 7.25% ...................           32,504,980

Electric - Integrated - 7.5%
     632,525       Houston Industries, Inc., convertible, 7.00%       67,284,847

Medical - Wholesale Drug Distributors - 0.7%
      53,725       McKesson Financing Trust, convertible,
                     5.00% ................................            5,768,722

Radio - 1.3%
     121,918       Chancellor Media Corp., convertible, $3.00         11,323,134

Telecommunication Services - 0.7%
     140,430       Qwest Trends Trust, convertible, 5.75%+             6,600,210
- --------------------------------------------------------------------------------
Total Preferred Stock (cost $127,218,327) .................          172,134,245
- --------------------------------------------------------------------------------
U.S. Government Obligations - 6.8%
                   U.S. Treasury Notes:
$  8,000,000         6.50%, due 5/15/05 ...................            8,764,480
     525,000         7.00%, due 7/15/06 ...................              599,062
  26,000,000         6.125%, due 8/15/07 ..................           28,446,860
  22,000,000         5.625%, due 5/15/08 ..................           23,477,300
- --------------------------------------------------------------------------------
Total U.S. Government Obligations (cost $57,843,028) ......           61,287,702
- --------------------------------------------------------------------------------
U.S. Government Agencies - 9.1%
                   Freddie Mac:
  16,000,000         4.50%, 1/4/99 ........................           15,994,000
  66,200,000         4.70%, 1/4/99 ........................           66,174,072
- --------------------------------------------------------------------------------
Total U.S. Government Agencies (amortized cost $82,168,072)           82,168,072
- --------------------------------------------------------------------------------
Total Investments (total cost $698,505,667) - 99.3% .......          893,121,147
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 0 7%          6,636,315
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $    899,757,462
- --------------------------------------------------------------------------------

Summary of Investments by Country, December 31, 1998

Country                       % of Investment Securities          Market Value
- --------------------------------------------------------------------------------
Canada                                     0.9%                 $      7,590,412
Finland                                    1.0%                        9,098,451
Ireland                                    0.3%                        2,869,944
United States++                           97.8%                      873,562,340
- --------------------------------------------------------------------------------
Total                                    100.0%                 $    893,121,147

++Includes Short-Term Securities (88.6% excluding Short-Term Securities)

See Notes to Schedules of Investments.

                                      Janus Aspen Series / December 31, 1998  25
<PAGE>

Janus | Aspen Equity Income Portfolio

[PHOTO]
Blaine P. Rollins
portfolio manager

For the fiscal  year ended  December  31,  1998,  I'm happy to report that Janus
Aspen  Equity  Income   Portfolio   returned  an   impressive   46.24%  for  its
Institutional  Shares and 45.55% for its Retirement  Shares. In comparison,  the
S&P 500 Index gained 28.74%.(1)

Despite a series of events  that  stirred  up market  volatility  and slowed the
global  economy  in the  second  half,  U.S.  growth  remained  steady.  In this
environment we were able to achieve high returns with below-average  volatility,
tracking  down some of the best  income-producing  securities  the market has to
offer.

While  a  number  of  companies  contributed  substantially  to the  Portfolio's
success,  those that stand out in my mind include  America Online (AOL) and Dell
Computer.  These, and a handful of our other technology holdings,  not only rode
out some storms early in the period,  but also helped lead a rally near year-end
as technology proved to be the U.S. market's strongest growth area.

Our convertible  bond position in AOL - the premier name among Internet  service
providers  - became a  definite  winner  for the  Portfolio.  Practically  every
business  wants to be involved with AOL in some shape or form. And following the
completion of its merger with Netscape  Communications,  a developer of Internet
browsers,  AOL will reach an even larger  audience  of people that will  include
business, residential and college users.

Dell was another standout during the period. By selling made-to-order  computers
over the phone and  Internet  and  shipping  them the same day,  Dell  continues
cutting costs and taking market share from its competitors.  Meanwhile, other PC
manufacturers are crossing their fingers in hopes of selling their higher-priced
products through retail stores.

Cable companies also remain on our list of favorites  thanks to the rejuvenation
of this business caused by new, value-added services that include digital cable,
telephony,  video on demand and high-speed  Internet access.  Among our holdings
benefiting  from the  continued  growth  of this  industry  are  Comcast  Corp.,
Tele-Communications,  Inc.  (via  the  TCI  Pacific  Communications  convertible
preferred stocks), and Time Warner, Inc.

While Time Warner was a home run among the  Portfolio's  cable  positions,  this
media  conglomerate  is also drawing steady cash flows from its TV  broadcasting
and syndication businesses.  New hit shows like "Felicity" and "Dawson's Creek,"
as well as reruns of  "Seinfeld"  and  "Friends"  are  attracting  not only more
viewers,  but  also  advertising  dollars.  Time  Warner's  thriving  music  and
publishing  businesses  further  justify our  investment  in this  company  (via
Houston Industries convertible preferred stocks).

The  Portfolio's  pharmaceutical  holdings aided our  performance,  with notable
gains from  Warner-Lambert and Pfizer.  Newcomers to the Portfolio - Pharmacia &
Upjohn and Alza - also performed well, gaining from enthusiasm surrounding their
two new incontinence drugs.

Royal  Caribbean  Cruises and  Carnival  Corporation  remain  among our favorite
positions.  However,  during the second half, their stocks stumbled briefly from
fears of a possible recession.  By dropping in at their Miami  headquarters,  we
were able to  double-check  both  companies'  stories  and walked  away  feeling
reassured their businesses remain very tight. Consequently, we used the sell-off
as an  opportunity  to add to these  two  positions,  which,  by  year-end,  had
regained lost ground.

In spite of the  Portfolio's  solid gains, a few of our holdings  failed to meet
our high  expectations.  Household  International and UBS were among some of our
financial   services   positions  that  suffered  late  in  the  period.   Their
fundamentals  deteriorated  under the weight of several  external  factors  that
included  credit  issues  related to  economic  breakdowns  in several  emerging
economies. We sold these positions at a loss.

Parametric Technology was another  disappointment.  This company shifted much of
its attention  toward a new-product  rollout and, in doing so, its core business
suffered.  Consequently,  Parametric's  earnings fell short of expectations, and
its stock dropped sharply. We therefore sold this position at a loss.

Looking ahead,  near-term surges in economic growth don't seem likely.  The good
news is that the global economic  slowdown has caused  commodity  prices to drop
and subsequently promoted a worldwide trend toward lower interest rates. In this
environment,  we believe  the  financial  markets  should  continue to grow at a
moderate pace.

In closing,  I'd like to thank you for your continued  investment in Janus Aspen
Equity  Income  Portfolio.  We look forward to what we hope will be equal if not
better returns for the Portfolio in 1999.

Portfolio Asset Mix                   December 31, 1998        December 31, 1997
- --------------------------------------------------------------------------------
Equities                                     61.9%                    74.7%
Number of Stocks                                47                       65
Top 10 Equities/Preferred                    39.2%                    28.5%
Fixed-Income Securities
  Investment-Grade
    Corporate Bonds                            --                      7.9%
  High-Yield Corporate Bonds                 12.7%                      --
Preferred  Stock                             21.2%                     6.2%
Cash & Cash  Equivalents                      4.2%                    11.2%
- --------------------------------------------------------------------------------
(1) All returns include reinvested dividends.

26  Janus Aspen Series / December 31, 1998
<PAGE>

Average Annual Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 5/1/97)
  1 Year                                                     46.24%
  From Inception                                             50.20%
- --------------------------------------------------------------------------------
S&P 500 Index
  1 Year                                                     28.74%
  From Inception Date of Institutional Shares                31.38%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/97)
  1 Year                                                     45.55%
  From Inception                                             49.43%
- --------------------------------------------------------------------------------
Note: Performance of the Retirement  Shares is lower from the performance  shown
      on this graph for the  Institutional  Shares,  based upon the higher  fees
      paid by shareholders investing in this class.

Performance Overview(1)

[GRAPHIC OMITTED]

A graphic comparison of the change in value of a hypothetical $10,000 investment
in Janus Aspen Equity Income  Portfolio -  Institutional  Shares and the S&P 500
Index. Janus Aspen Equity Income Portfolio - Institutional Shares is represented
by a shaded  area of blue.  The S&P 500 Index is  represented  by a solid  black
line. The "y" axis reflects the value of the  investment.  The "x" axis reflects
the computation periods from inception,  May 1, 1997, through December 31, 1998.
The  upper  right  quadrant  reflects  the  ending  value  of  the  hypothetical
investment  in Janus  Aspen  Equity  Income  Portfolio  -  Institutional  Shares
($19,679) as compared to the S&P 500 Index ($15,778).

Average Annual Total Return 
for the periods ended December 31, 1998 
One Year, 46.24% 
Since 5/1/97,* 50.20%

Janus Aspen Equity Income Portfolio
- - Institutional Shares - $19,679

S&P 500 Index - $15,778

*The Portfolio's inception date.
Source - Lipper Analytical Services, Inc. 1998.

(1)  All returns reflect reinvested  dividends.  The Portfolio's  securities may
     differ significantly from the securities in the Index. Index returns do not
     include  taxes or  dividends  and interest  payments or operating  expenses
     necessary to maintain a portfolio  consisting of the same  securities  that
     are in the Index.  These returns do not reflect the charges and expenses of
     any particular  insurance product or qualified plan.  Investment return and
     principal value will fluctuate so that shares, when redeemed,  may be worth
     more or less than their  original cost.  The adviser  voluntarily  waives a
     portion of the Portfolio's  expenses.  Without such waiver, the Portfolio's
     total returns for each class would have been lower.  Past  performance does
     not guarantee future results.


SCHEDULE OF INVESTMENTS

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Commom Stock - 61.9%
Cable Television - 4.6%
       1,035       Adelphia Communications Corp. - Class A*     $         47,351
       6,237       Comcast Corp. - Special Class A ........              366,034

                                                                         413,385

Chemicals - Diversified - 0.1%
         215       Solutia, Inc. ..........................                4,811

Circuits - 5.0%
       2,365       Linear Technology Corp. ................              211,815
       4,435       Maxim Integrated Products, Inc.* .......              193,754
       1,425       SIPEX Corp.* ...........................               50,053

                                                                         455,622

Commercial Banks - 2.3%
         575       Firstar Corp. ..........................               53,619
         115       M & T Bank Corp. .......................               59,678
       1,235       U.S. Trust Corp. .......................               93,860

                                                                         207,157

Computer Software - 3.8%
       1,490       Microsoft Corp.* .......................              206,644
       2,845       Wind River Systems, Inc.* ..............              133,715

                                                                         340,359

Computers - Integrated Systems - 1.3%
       3,880       Cadence Design Systems, Inc.* ..........              115,430

Computers - Micro - 4.0%
       4,925       Dell Computer Corp.* ...................              360,448

Cruise Lines - 3.0%
       4,025       Carnival Corp. .........................     $        193,200
       2,168       Royal Caribbean Cruises, Ltd. ..........               80,216

                                                                         273,416

Electronic Components - Semiconductors - 0.9%
         985       Texas Instruments, Inc. ................               84,279

Finance - Investment Bankers/Brokers - 4.2%
       6,757       Charles Schwab Corp. ...................              379,659

Finance - Mortgage Loan Banker - 0.9%
       1,060       Fannie Mae .............................               78,440

Finance - Other Services - 1.1%
       1,520       Newcourt Credit Group, Inc. ............               52,945
       1,350       Newcourt Credit Group, Inc. ............
                     - New York Shares ....................               47,166

                                                                         100,111

Human Resources - 1.3%
       2,580       Robert Half International, Inc.* .......              115,294

Instruments - Scientific - 2.3%
       5,730       Dionex Corp.* ..........................              209,861

Medical - Drugs - 5.5%
         610       American Home Products Corp. ...........               34,351
         800       Pfizer, Inc. ...........................              100,350
       1,830       Pharmacia & Upjohn, Inc. ...............              103,624
       2,170       Schering-Plough Corp. ..................              119,893
       1,900       Warner-Lambert Co. .....................              142,856

                                                                         501,074

See Notes to Schedules of Investments.

                                       Janus Aspen Series/ December 31, 1998  27
<PAGE>

Janus | Aspen Equity Income Portfolio

SCHEDULE OF INVESTMENTS (Continued)

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Medical Instruments - 0.7%
         835       Medtronic, Inc. ........................     $         61,999

Money Center Banks - 4.0%
       9,095       Bank of New York Co., Inc. .............              366,074

Multimedia - 0.9%
       2,125       Meredith Corp. .........................               80,484

Networking Products - 3.0%
       2,920       Cisco Systems, Inc.* ...................              271,012

Optical Supplies - 0.8%
       1,115       Allergan, Inc. .........................               72,196

Radio - 4.1%
       3,335       Heftel Broadcasting Corp. - Class A* ...              164,249
       7,665       Infinity Broadcasting Corp. - Class A* .              209,829

                                                                         374,078

Retail - Discount - 2.2%
       2,815       Costco Companies, Inc.* ................              203,208

Retail - Internet - 1.1%
         320       Amazon.com, Inc.* ......................              102,800

Retail - Regional Department Stores - 1.0%
       1,475       Fred Meyer, Inc.* ......................               88,869

Super-Regional Banks - 0.6%
         575       Northern Trust Corp. ...................               50,204

Telecommunication Equipment - 1.3%
         980       Nokia Oyj (ADR) - Class A ..............              118,029

Television - 1.9%
       4,697       Univision Communications, Inc. - Class A*             169,973
- --------------------------------------------------------------------------------
Total Commom Stock (cost $3,887,110) ......................            5,598,272
- --------------------------------------------------------------------------------
Corporate Bonds - 12.7%
Cable Television - 0.4%
$     35,000       Classic Cable, Inc., 9.875%
                     senior subordinated notes, due 8/1/08                36,400

Computer Software - 5.8%
     193,000       Aspen Technology, Inc., 5.25%
                     subordinated debentures, due 6/15/05 .              135,582
     140,000       Beyond.com Corp., 7.25%
                     subordinated notes, due 12/1/03 ......              173,950
     185,000       Wind River Systems, Inc., 5.00%
                     convertible subordinated notes,
                     due 8/1/02 ...........................              213,906

                                                                         523,438

Computers - Memory Devices - 0.9%
      50,000       VERITAS Software Corp., 5.25%
                     convertible subordinated notes,
                     due 11/1/04 ..........................               79,000

Drug Delivery Systems - 2.0%
     125,000       ALZA Corp., 5.00%
                     convertible subordinated debentures,
                     due 5/1/06 ...........................              179,687

Fiber Optics - 0.1%
       7,000       Metromedia Fiber Network, Inc., 10.00%
                     senior notes, due 11/15/08 ...........                7,236

Human Resources - 0.7%
      75,000       Interim Services, Inc., 4.50%
                     subordinated notes, due 6/1/05 .......               65,719

Internet Software - 1.9%
$     25,000       America Online, Inc., 4.00%
                     convertible subordinated notes,
                     due 11/15/02 .........................     $        140,469
      25,000       Exodus Communications, Inc., 11.25%
                     senior notes, due 7/1/08 .............               25,125

                                                                         165,594

Retail - Building Products - 0.9%
      30,000       Home Depot, Inc., 3.25%
                     convertible subordinated notes,
                     due 10/1/01 ..........................               78,825
- --------------------------------------------------------------------------------
Total Corporate Bonds (cost $927,630) .....................            1,135,899
- --------------------------------------------------------------------------------
Preferred Stock - 21.2%
Cable Television - 5.0%
       2,910       MediaOne Group, Inc., convertible, 4.50%              276,450
         600       TCI Pacific Communications, Inc.
                     - Series A, convertible, 5.00% .......              168,825

                                                                         445,275

Cruise Lines - 3.4%
       2,700       Royal Caribbean Cruises, Ltd.,
                     convertible, 7.25% ...................              310,500

Electric - Intergrated - 8.2%
       6,975       Houston Industries, Inc., convertible, 7.00%          741,966

Medical - Wholesale Drug Distributors - 1.0%
         870       McKesson Financing Trust,
                     convertible, 5.00% ...................               93,416

Radio - 2.9%
       2,792       Chancellor Media Corp., convertible, $3.00            259,307

Telecommunication Services - 0.7%
       1,400       Qwest Trends Trust, convertible, 5.75% .               65,800
- --------------------------------------------------------------------------------
Total Preferred Stock (cost $1,458,459) ...................            1,916,264
- --------------------------------------------------------------------------------
U.S. Government Agency - 2.5%
                   Freddie Mac
$    230,000         4.70%, 1/4/99 (amortized cost $229,910)             229,910
- --------------------------------------------------------------------------------
Total Investments (total cost $6,503,109) - 98.3% .........            8,880,345
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 1 7%            156,472
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $      9,036,817
- --------------------------------------------------------------------------------

Summary of Investments by Country, December 31, 1998

Country                       % of Investment Securities          Market Value
- --------------------------------------------------------------------------------
Canada                                     1.1%                 $        100,111
Finland                                    1.3%                          118,029
United States++                           97.6%                        8,662,205
- --------------------------------------------------------------------------------
Total                                    100.0%                 $      8,880,345

++Includes Short-Term Securities (95.0% excluding Short-Term Securities)

See Notes to Schedules of Investments.

28  Janus Aspen Series / December 31, 1998
<PAGE>

                                       Janus | Aspen Growth and Income Portfolio

[PHOTO]
David J. Corkins
portfolio manager

Since its inception on May 1, 1998,  Janus Aspen Growth and Income Portfolio has
posted solid returns for investors in spite of extreme  volatility that occurred
in the second half of the year.  For the period ended  December  31,  1998,  the
Portfolio  returned  19.80%  for its  Institutional  Shares  and  19.40% for its
Retirement Shares. In comparison, the S&P 500 Index gained 11.72%.(1)

The first three months of the Portfolio's operation were generally  constructive
for stocks and bonds, as both the Dow Jones  Industrial  Average and the S&P 500
Index  pushed  into  new  high  ground  in  July  following  a brief  period  of
consolidation.  From August  through  mid-October,  however,  the stock and bond
markets were derailed by several  factors.  These included  increasing  concerns
about the effects of the Asian financial crisis on the U.S. economy, fears about
the Brazilian banking system and Russia's unexpected devaluation of its currency
and default on its debt.  Consequently,  the  popular  stock  averages  declined
approximately  20% from their highs,  while many individual  stocks  experienced
considerably greater losses.

Fixed-income  investments  were  also  hit  hard,  with  the  exception  of U.S.
Treasuries,  which were seen as a safe haven.  In the fourth  quarter,  however,
U.S. bond and equity markets rebounded  sharply,  primarily in response to three
cuts in short-term  interest rates by the Federal Reserve Board.  The year ended
on a strong note,  with the Dow hovering near record highs and the S&P 500 Index
breaking through the 1200 barrier in December.

My approach  to picking  stocks is  bottom-up;  that is, I look at the merits of
individual companies rather than at big-picture, macroeconomic factors. However,
low inflation is one big-picture  consideration  that heavily  influences what I
do. Low inflation  makes it difficult for companies to raise prices.  This means
that in order to increase  earnings,  most firms have to grow their sales or cut
costs.  In choosing stocks to add to the Portfolio,  therefore,  I'm looking for
companies that can offer one or more of the following  benefits:  pricing power,
sales growth,  or the ability to lower costs.  Mergers and  acquisitions are one
avenue for increasing top-line growth and cutting costs; that's why we're seeing
so many  mergers in  virtually  all sectors of the  economy.  Technology  offers
another  important  method of cutting costs. In taking all of these factors into
account, I try to anticipate  opportunities and exemplify Wayne Gretsky's advice
to "Go to where the puck is going to be, not to where it is."

Two areas that were helpful to the Portfolio's  performance  were technology and
cable  television.  In technology,  Dell Computer was a big winner.  Dell has an
outstanding  management  team  and has been  extremely  effective  at  marketing
computers  online.  In cable,  At Home is a  provider  of  Internet  connections
through  cable TV, a far more  convenient  method of accessing the Internet than
dialing an Internet service provider.

As for stocks  that hurt  performance,  Monsanto  comes to mind.  The  company's
planned merger with American Home Products fell apart,  damaging the stock price
in the process.  We  consequently  liquidated our position in Monsanto.  Another
underperformer,  BankAmerica,  suffered  from  turmoil in upper  management  and
problems  regarding the  company's  merger with  NationsBank.  Despite these set
backs my  long-term  outlook  for  BankAmerica  persuaded  me to hold on to this
position.

Looking ahead, I see continued slow economic growth with no outright  recession,
low  interest  rates,  and  benign  inflation  - in other  words,  a  reasonably
favorable  environment for stocks and bonds.  In terms of the Portfolio,  I take
the  "growth"  part of the  equation  seriously  and  share  many of the  proven
techniques  employed  by other  Janus  managers.  I also try to  manage  risk by
limiting  the size of our  positions.  To achieve  its income  goals and provide
downside  protection,  the Portfolio generally holds a number of stocks that pay
dividends, as well as selected preferred stocks and fixed-income securities.

As always,  thank you for your  continued  investment  in Janus Aspen Growth and
Income Portfolio.

Portfolio Asset Mix                         December 31, 1998
- --------------------------------------------------------------------------------
Equities                                          83.3%
Number of Stocks                                     73
Top 10 Equities                                   31.1%
Fixed-Income Securities                            0.7%
Cash & Cash Equivalents                           16.0%
- --------------------------------------------------------------------------------

(1) All returns include reinvested dividends.

                                      Janus Aspen Series / December 31, 1998  29
<PAGE>

Cumulative Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 5/1/98)
From Inception                                               19.80%
- --------------------------------------------------------------------------------
S&P 500 Index
From Inception Date of Institutional Shares                  11.72%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/98)
From Inception                                               19.40%
- --------------------------------------------------------------------------------
Note: Performance of the Retirement  Shares is lower from the performance  shown
      on this graph for the  Institutional  Shares,  based upon the higher  fees
      paid by shareholders investing in this class.

Performance Overview(1)

[GRAPHIC OMITTED]

A graphic comparison of the change in value of a hypothetical $10,000 investment
in Janus Aspen Growth and Income  Portfolio -  Institutional  Shares and the S&P
500 Index.  Janus Aspen Growth and Income  Portfolio -  Institutional  Shares is
represented  by a shaded  area of blue.  The S&P 500 Index is  represented  by a
solid black line.  The "y" axis  reflects the value of the  investment.  The "x"
axis  reflects the  computation  periods from  inception,  May 1, 1998,  through
December 31,  1998.  The upper right  quadrant  reflects the ending value of the
hypothetical   investment   in  Janus  Aspen  Growth  and  Income   Portfolio  -
Institutional Shares ($11,980) as compared to the S&P 500 Index ($11,172).

Cumulative Total Return
for the periods ended December 31, 1998
Since 5/1/98,* 19.80%

Janus Aspen Growth and Income Portfolio
- - Institutional Shares - $11,980

S&P 500 Index - $11,172


*The Portfolio's inception date.
Source - Lipper Analytical Services, Inc. 1998.

(1)  All returns reflect reinvested  dividends.  The Portfolio's  securities may
     differ significantly from the securities in the Index. Index returns do not
     include  taxes or  dividends  and interest  payments or operating  expenses
     necessary to maintain a portfolio  consisting of the same  securities  that
     are in the Index.  These returns do not reflect the charges and expenses of
     any particular  insurance product or qualified plan.  Investment return and
     principal value will fluctuate so that shares, when redeemed,  may be worth
     more or less than their  original cost.  The adviser  voluntarily  waives a
     portion of the Portfolio's  expenses.  Without such waiver, the Portfolio's
     total returns for each class would have been lower.  Past  performance does
     not guarantee future results.

SCHEDULE OF INVESTMENTS

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Common Stock - 79.1%
Advertising Sales - 0.9%
       2,000       Outdoor Systems, Inc.* .................     $         60,000

Agricultural Operations - 0.2%
         420       Delta and Pine Land Co. ................               15,540

Automotive - Cars and Light Trucks - 0.9%
         600       Ford Motor Co. .........................               35,212
         500       Renault S.A ............................               22,467

                                                                          57,679

Beverages - Non-Alcoholic - 0.5%
         800       Coca-Cola Enterprises, Inc. ............               28,600

Broadcast Services and Programming - 0.5%
         675       Tele-Communications Liberty Media
                     Group, Inc. - Class A* ...............               31,092

Cable Television - 5.3%
       3,600       Comcast Corp. - Special Class A ........              211,275
       1,300       Cox Communications, Inc. - Class A* ....               89,862
         300       MediaOne Group, Inc. ...................               14,100
         500       Tele-Communications, Inc. - Class A* ...               27,656

                                                                         342,893

Circuits - 0.7%
       1,000       Maxim Integrated Products, Inc.* .......               43,687

Commercial Banks - 2.5%
       1,700       Firstar Corp. ..........................              158,525

Computer Software - 4.4%
       1,700       Microsoft Corp.* .......................     $        235,769
       1,000       Wind River Systems, Inc.* ..............               47,000

                                                                         282,769

Computers - Micro - 2.6%
       2,250       Dell Computer Corp.* ...................              164,672

Containers - Paper and Plastic - 0.3%
         400       Sealed Air Corp.* ......................               20,425

Cruise Lines - 0.9%
       1,500       Royal Caribbean Cruises, Ltd. ..........               55,500

Diversified Financial Services - 0.9%
       1,100       Citigroup, Inc. ........................               54,450

Diversified Operations - 5.1%
       2,000       General Electric Co. ...................              204,125
       1,600       Tyco International, Ltd. ...............              120,700

                                                                         324,825

Drug Delivery Systems - 1.2%
       1,100       Elan Corp. PLC (ADR)* ..................               76,519

Electronic Components - Semiconductors - 1.3%
         500       Intel Corp. ............................               59,281
         300       Texas Instruments, Inc. ................               25,669

                                                                          84,950

Finance - Consumer Loans - 0.4%
         600       Household International, Inc. ..........               23,775

Finance - Credit Card - 1.9%
       1,200       American Express Co. ...................              122,700

See Notes to Schedules of Investments.

30  Janus Aspen Series / December 31, 1998
<PAGE>

                                       Janus | Aspen Growth and Income Portfolio

SCHEDULE OF INVESTMENTS (continued)

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Finance - Investment Bankers/Brokers - 1.0%
       1,125       Charles Schwab Corp. ...................     $         63,211

Finance - Mortgage Loan Banker - 0.9%
         800       Fannie Mae .............................               59,200

Finance - Other Services - 0.7%
       1,300       Newcourt Credit Group, Inc.
                     - New York Shares ....................               45,419

Internet Content - 0.8%
         300       At Home Corp. - Class A* ...............               22,275
         715       InfoSpace.com, Inc.* ...................               27,260

                                                                          49,535

Internet Software - 2.9%
       1,300       America Online, Inc.* ..................              188,175

Investment Companies - 1.4%
       3,900       Tele-Communications TCI Ventures
                     Group - Class A* .....................               91,894

Life and Health Insurance - 1.0%
         800       SunAmerica, Inc. .......................               64,900

Medical - Drugs - 12.6%
         445       American Home Products Corp. ...........               25,059
         700       Bristol-Myers Squibb Co. ...............               93,669
       1,000       Eli Lilly and Co. ......................               88,875
         700       Merck & Co., Inc. ......................              103,381
       1,400       Pfizer, Inc. ...........................              175,613
       2,300       Pharmacia & Upjohn, Inc. ...............              130,238
       1,000       Schering-Plough Corp. ..................               55,250
       1,800       Warner-Lambert Co. .....................              135,338

                                                                         807,423

Medical Instruments - 0.3%
         300       Medtronic, Inc. ........................               22,275

Money Center Banks - 1.5%
       1,300       BankAmerica Corp. ......................               78,162
          64       UBS A.G ................................               19,664

                                                                          97,826

Multi-Line Insurance - 0.9%
         190       American Bankers Insurance Group, Inc. .                9,191
       1,100       Assicurazioni Generali .................               46,032

                                                                          55,223

Multimedia - 5.3%
       1,200       CBS Corp. ..............................               39,300
       3,700       Time Warner, Inc. ......................              229,631
       1,000       Viacom, Inc. - Class B* ................               74,000

                                                                         342,931

Networking Products - 3.9%
       2,700       Cisco Systems, Inc.* ...................              250,594

Optical Supplies - 1.0%
       1,000       Allergan, Inc. .........................               64,750

Radio - 1.3%
         500       Chancellor Media Corp.* ................               23,937
       1,025       Infinity Broadcasting Corp. - Class A* .               28,059
         500       Jacor Communications, Inc.* ............               32,188

                                                                          84,184

Retail - Building Products - 1.3%
       1,400       Home Depot, Inc. .......................               85,662

Retail - Discount - 1.6%
       1,400       Costco Companies, Inc.* ................     $        101,062

Retail - Regional Department Stores - 1.5%
       1,600       Fred Meyer, Inc.* ......................               96,400

Savings/Loan/Thrifts - 0.1%
       1,000       Thistle Group Holdings Co. .............                9,625

Telecommunication Equipment - 3.2%
         800       Lucent Technologies, Inc. ..............               88,000
       1,000       Nokia Oyj (ADR) - Class A ..............              120,438

                                                                         208,438

Telecommunication Services - 0.8%
         140       Global Crossing, Ltd.* .................                6,318
       5,000       Telecom Italia S.p.A ...................               42,662

                                                                          48,980

Telephone - Long Distance - 2.8%
       2,500       MCI WorldCom, Inc.* ....................              179,375

Tobacco - 1.2%
       1,500       Philip Morris Companies, Inc. ..........               80,250

Transportation - Air Freight - 0.6%
         400       FDX Corp.* .............................               35,600
- --------------------------------------------------------------------------------
Total Common Stock (cost $4,121,889) ......................            5,081,533
- --------------------------------------------------------------------------------
Corporate Bonds - 0.7%
Cable Television - 0.3%
$      1,000       Mediacom L.L.C., 8.50%
                     senior notes, due 4/15/08  ...........                1,021
      15,000       Rifkin Acquisition Partners, L.P., 11.125%
                     senior subordinated notes, due 1/15/06               16,406

                                                                          17,427

Distribution and Wholesale - 0.1%
       8,000       Aviation Sales Co., 8.125%
                     company guaranteed notes, due 2/15/08                 7,920

Metal Processors and Fabricators - 0%
       2,000       Haynes International, Inc. 11.625%
                     senior notes, due 9/1/04 .............                1,860

Music/Clubs - 0.1%
       5,000       Selmer Co., Inc., 11.00%
                     senior subordinated notes, due 5/15/05                5,344

Retail - Diversified - 0%
       2,000       Eye Care Centers of America, Inc., 9.125%
                     senior subordinated notes, due 5/1/08+                1,920

Retail - Regional Department Stores - 0.1%
       7,000       Fred Meyer, Inc., 7.45%
                     company guaranteed notes, due 3/1/08 .                7,560

Telecommunication Services - 0.1%
       3,000        Level 3 Communications, Inc., 9.125%
                     senior notes, due 5/1/08 .............                2,978
- --------------------------------------------------------------------------------
Total Corporate Bonds (cost $44,963) ......................               45,009
- --------------------------------------------------------------------------------
Preferred Stock - 4.2%
Automotive - Cars and Light Trucks - 0.4%
          10       Porsche A.G ............................               22,816

Automotive - Truck Parts and Equipment - 0.5%
         528       Federal-Mogul Financial Trust,
                     convertible, 7.00% ...................               34,650

See Notes to Schedules of Investments

                                      Janus Aspen Series / December 31, 1998  31
<PAGE>

Janus | Aspen Growth and Income Portfolio

SCHEDULE OF INVESTMENTS (continued)

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Cable Television - 2.0%
                   MediaOne Group, Inc., convertible:
         490         4.50% ................................     $         46,550
         225         6.25% ................................               14,962
         225       TCI Pacific Communications, Inc.,
                     - Series A, convertible, 5.00% .......               63,309

                                                                         124,821

Cruise Lines - 0.1%
          70       Royal Caribbean Cruises, Ltd., convertible,
                     7.25% ................................                8,050

Electric - Integrated - 1.0%
         600       Houston Industries, Inc., convertible, 7.00%           63,825

Radio - 0.2%
         165       Chancellor Media Corp., convertible, $3.00             15,324
- --------------------------------------------------------------------------------
Total Preferred Stock (cost $224,655) .....................              269,486
- --------------------------------------------------------------------------------
U.S. Government Agency - 18.7%
$  1,200,000       Freddie Mac
                     4.70%, 1/4/99
                     (amortized cost $1,199,530) ..........            1,199,530
- --------------------------------------------------------------------------------
Total Investments (total cost $5,591,037) - 102.7% ........            6,595,558
- --------------------------------------------------------------------------------
Liabilities, net of Cash, Receivables and Other Assets - (2.7%)        (170,606)
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $      6,424,952
- --------------------------------------------------------------------------------

Summary of Investments by Country, December 31, 1998

Country                       % of Investment Securities          Market Value
- --------------------------------------------------------------------------------
Canada                                     0.7%                 $         45,419
Finland                                    1.8%                          120,438
France                                     0.3%                           22,467
Germany                                    0.4%                           22,816
Ireland                                    1.2%                           76,519
Italy                                      1.4%                           88,694
Switzerland                                0.3%                           19,664
United States++                           93.9%                        6,199,541
- --------------------------------------------------------------------------------
Total                                    100.0%                 $      6,595,558

++Includes Short-Term Securities (75.8% excluding Short-Term Securities)

See Notes to Schedules of Investments.

32  Janus Aspen Series / December 31, 1998
<PAGE>

                                         Janus | Aspen Flexible Income Portfolio

[PHOTO]
Ronald V. Speaker
portfolio manager

For the 12 months ended December 31, 1998, Janus Aspen Flexible Income Portfolio
slightly trailed the Lehman Brothers  Government/Corporate Bond Index, returning
9.11% for its  Institutional  Shares  and 8.58% for its  Retirement  Shares.  In
comparison, the Index returned 9.47% for the same period.(1)

The Portfolio's  diversified  investment  approach served it well throughout the
first half of the year, which was characterized by rising stock and bond prices.
In the third  quarter,  however,  the markets did an  about-face,  as  investors
sought  quality and safety,  and avoided  risk.  Increasing  concerns  about the
effect  of the  Asian  financial  crisis on the U.S.  economy,  fears  about the
Brazilian banking system and Russia's devaluation of its currency and default on
its debt all  contributed to  dislocations  in the financial  markets.  This, in
turn,  caused  certain  strategies  employed by a number of large hedge funds to
backfire. As the hedge funds were forced to unwind many of their positions,  the
spread,  or difference,  between the yields on corporate bonds and the yields on
Treasuries  widened  considerably.  While the Portfolio's  positions in Treasury
securities  benefited from this turn of events, its corporate holdings were hurt
by them, particularly the high-yield issues.

In the fourth quarter, equity markets rebounded strongly,  primarily in response
to three cuts in short-term interest rates by the Federal Reserve Board. The Dow
Jones Industrial Average rallied back to a new all-time high close of 9374.27 on
November 23, while the S&P 500 Index crossed the 1200 mark for the first time in
December. The bond market's reaction to the rate cuts was mixed, with high-yield
bonds responding favorably while Treasuries softened from their precrisis levels
because of investor  perceptions that the economy had been saved by Fed Chairman
Alan Greenspan.

Like the markets of 1998, my strategy can be understood as having three distinct
phases.  For the first half of the year,  I pursued a  diversification  strategy
that included  extensive  participation in the high-yield  market, as well as in
investment-grade  corporates and  Treasuries.  In late summer,  quality became a
much higher  priority for the  Portfolio,  and I reduced  higher-risk  assets in
favor of those with lower risk. Within the high-yield  sector,  for instance,  I
cut back our overall  exposure and upgraded the quality of many of our holdings.
When the markets settled down and prices began to rally in the fourth quarter, I
increased our high-yield  exposure  somewhat but maintained a strong emphasis on
quality.

The  supermarket  industry was one area in which the  Portfolio  had a number of
successes  during  the  period.  Fred  Meyer,  the  Portfolio's  single  largest
corporate  bond  holding,   recently   agreed  to  be  acquired  by  Kroger,   a
higher-rated,  less-leveraged  bond. This helped the Fred Meyer bond outperform.
In another  consolidation move, J. Sainsbury took over Star Markets,  aiding our
position in the latter's bonds for the same reason.

In cable  telephony,  our  holdings in TCI  Communications  benefited  from that
company's  acquisition  by  AT&T  and  the  stability  of  cash  flow  investors
anticipate from the union.  Telecommunications was another strong sector for the
Portfolio. One name that stood out was Qwest Communications International, whose
bonds were helped when the company entered into an attractive joint venture with
Microsoft.

On the other hand, Metricom was one holding that proved disappointing. This bond
suffered from a slower-than-anticipated  rollout of the company's technology, as
well as from the overall modest valuations  investors accorded the securities of
companies in the  small-capitalization  category.  However, we continued to hold
this bond in view of the  quality  of  Metricom's  wireless  technology  and the
prospects for its imminent nationwide rollout.

Overall,  I look for economic growth in the U.S. and abroad to be slower in 1999
than it was in 1998, as the Asian financial crisis continues to result in slower
earnings growth for multinational companies with Asian exposure.  However, I see
no  recession  on the  horizon any time soon.  A scenario  of moderate  economic
growth,  low  inflation  and low  interest  rates should be  supportive  of bond
investments.

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

Portfolio Asset Mix                   December 31, 1998        December 31, 1997
- --------------------------------------------------------------------------------
Investment-Grade
  Corporate Bonds                            37.1%                    26.9%
High-Yield/High-Risk Bonds                   26.5%                    39.9%
Long Term U.S. Government
  Obligations and Agencies                   23.8%                    20.9%
Preferred Stock                               2.4%                     0.6%
Cash & Cash Equivalents                      10.2%                    11.7%
- --------------------------------------------------------------------------------
Portfolio Profile
- --------------------------------------------------------------------------------
Weighted Average Maturity                 8.7 Yrs.                 9.2 Yrs.
Average Modified Duration*                6.0 Yrs.                 5.8 Yrs.
30-Day Average Yield
  Institutional Shares**                     6.21%                    6.85%
  Retirement Shares**                        5.70%                    6.32%
Average Rating                                  A+                     BBB+
- --------------------------------------------------------------------------------
*A theoretical measure of price volatility.
**Yields will fluctuate.

(1) All returns include reinvested dividends.


                                      Janus Aspen Series / December 31, 1998  33
<PAGE>

Average Annual Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 9/13/93)
  1 Year                                                      9.11%
  5 Year                                                     10.32%
  From Inception                                              9.87%
- --------------------------------------------------------------------------------
Lehman Brothers Govt./Corp. Bond Index
  1 Year                                                      9.47%
  5 Year                                                      7.30%
  From Inception Date of Institutional Shares                 6.90%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/97)
  1 Year                                                      8.58%
  5 Year (unaudited)                                          9.77%
  From Portfolio Inception (unaudited)                        9.29%
- --------------------------------------------------------------------------------
Returns shown for  Retirement  Shares for periods  prior to their  inception are
derived from the historical  performance of  Institutional  Shares,  adjusted to
reflect the higher operating expenses of Retirement Shares.

Note: Performance of the Retirement  Shares is lower from the performance  shown
      on this graph for the  Institutional  Shares,  based upon the higher  fees
      paid by shareholders investing in this class.

Performance Overview(1)

[GRAPHIC OMITTED]

A graphic comparison of the change in value of a hypothetical $10,000 investment
in Janus Aspen Flexible Income  Portfolio - Institutional  Shares and the Lehman
Brothers  Govt./Corp.  Bond  Index.  Janus  Aspen  Flexible  Income  Portfolio -
Institutional  Shares  is  represented  by a  shaded  area of blue.  The  Lehman
Brothers  Govt./Corp.  Bond Index is  represented by a solid black line. The "y"
axis reflects the value of the investment. The "x" axis reflects the computation
periods from inception, September 13, 1993, through December 31, 1998. The upper
right quadrant reflects the ending value of the hypothetical investment in Janus
Aspen Flexible Income Portfolio - Institutional  Shares ($16,456) as compared to
the Lehman Brothers Govt./Corp. Bond Index ($14,233).

Average Annual Total Return 
for the periods ended December 31, 1998 
One Year, 9.11% 
Five Year, 10.32% 
Since 9/13/93,* 9.87%

Janus Aspen Flexible Income Portfolio
- - Institutional Shares - $16,456

Lehman Brothers Govt./Corp. Bond Index - $14,233

*The Portfolio's inception date.
Source - Lipper Analytical Services, Inc. 1998.

(1)  All returns reflect reinvested  dividends.  The Portfolio's  securities may
     differ significantly from the securities in the Index. Index returns do not
     include  taxes or  dividends  and interest  payments or operating  expenses
     necessary to maintain a portfolio  consisting of the same  securities  that
     are in the Index.  These returns do not reflect the charges and expenses of
     any particular  insurance product or qualified plan.  Investment return and
     principal value will fluctuate so that shares, when redeemed,  may be worth
     more or less than their original cost. Past  performance does not guarantee
     future results.

SCHEDULE OF INVESTMENTS

Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Corporate Bonds - 62.0%
Automotive - Truck Parts and Equipment - 0.4%
$    500,000       Safelite Glass Corp., 9.875%
                     senior subordinated notes, due 12/15/06+   $        463,750

Beverages - Non-Alcoholic - 1.2%
   1,500,000       Coca-Cola Enterprises, Inc., 6.95%
                     debentures, due 11/15/26 .............            1,608,750

Brewery - 0.8%
   1,000,000       Anheuser-Busch Companies, Inc., 5.65%
                     notes, due 9/15/08 ...................            1,018,750

Broadcast Services and Programming - 0.8%
   1,000,000       Fox/Liberty Networks L.L.C., 8.875%
                     senior notes, due 8/15/07 ............            1,020,000

Cable Television - 4.7%
     250,000       Adelphia Communications Corp., 9.50%
                     senior notes, due 2/15/04 ............              265,000
     500,000       Century Communications Corp., 8.375%
                     senior notes, due 12/15/07 ...........              537,500
     500,000       Galaxy Telecom, L.P., 12.375%
                     senior subordinated notes, due 10/1/05              555,000
   1,000,000       Jones Intercable, Inc., 7.625%
                     senior notes, due 4/15/08 ............            1,047,500
   1,000,000       Lenfest Communications, 7.625%
                     senior notes, due 2/15/08 ............            1,038,750
                   TCI Communications, Inc.:
   1,000,000         6.375%, senior notes, due 5/1/03 .....            1,035,000
   1,500,000         6.875%, senior notes, due 2/15/06 ....            1,601,250

                                                                       6,080,000

Casino Hotels - 1.3%
$  1,250,000       Venetian Casino Resort L.L.C., 12.25%
                     company guaranteed notes, due 11/15/04     $      1,171,875
     500,000       Santa Fe Hotel, Inc., 11.00%
                     first mortgage notes, due 12/15/00 ...              485,625

                                                                       1,657,500

Casino Services - 0.4%
     500,000       Isle of Capri Black Hawk L.L.C., 13.00%
                     first mortgage bonds, due 8/31/04 ....              530,000

Cellular Telecommunications - 1.0%
   1,250,000       360(degree) Communications Co., 6.65%
                     notes, due 1/15/08 ...................            1,320,312

Chemicals - Speciality - 0.3%
     350,000       Praxair, Inc., 6.625%
                     notes, due 10/15/07 ..................              357,000

Commercial Banks - 3.4%
   1,500,000       Bank One Texas, 6.25%
                     subordinated notes, due 2/15/08 ......            1,569,375
   1,000,000       First Union National Bank,
                     5.80%, subordinated notes, due 12/1/08            1,010,000
     700,000       HUBCO, Inc., 8.20%
                     subordinated debentures, due 9/15/06 .              763,000
   1,000,000       Provident Trust I Corp., 8.29%
                     company guaranteed notes, due 4/15/28             1,125,000

                                                                       4,467,375

See Notes to Schedules of Investments.

34  Janus Aspen Series / December 31, 1998
<PAGE>

                                         Janus | Aspen Flexible Income Portfolio

SCHEDULE OF INVESTMENTS (continued)

Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Computers - Integrated Systems - 0.2%
$    250,000       Candescent Technologies Corp., 7.00%
                     convertible senior subordinated
                     debentures, due 5/1/03+ ..............     $        220,000

Computers - Mainframe - 2.1% 
                   IBM Corp.:
   1,500,000         6.45%, notes, due 8/1/07 .............            1,610,625
   1,000,000         7.00%, debentures, due 10/30/25 ......            1,108,750

                                                                       2,719,375

Consumer Products - 0.2%
     450,000       Spin Cycle, Inc., zero coupon
                     senior discount notes, due 5/1/05 ....              243,131

Containers - Metal and Glass - 0.2%
     250,000       Crown Cork & Seal Co., Inc., 7.00% company
                     guaranteed notes, due 12/15/06 .......              263,750

Cruise Lines - 0.8%
   1,000,000       Royal Caribbean Cruises, Ltd., 7.00%
                     senior notes, due 10/15/07 ...........            1,003,750

Distribution and Wholesale - 0.3%
     445,000       Aviation Sales Co., 8.125%
                     company guaranteed notes, due 2/15/08               440,550

Diversified Operations - 1.0%
   1,250,000       Seagram, Joseph E. & Sons, Inc., 6.80%
                     company guaranteed notes, due 12/15/08            1,250,000

Drug Delivery Systems - 0.1%
     100,000       Biovail Corporation International, Inc.,
                     10.875%, senior notes, due 11/15/05+ .              101,500

Electric - Integrated - 0.9%
     600,000       El Paso Electric Co., 9.40%
                     first mortgage bonds, due 5/1/11 .....              695,250
     500,000       National Rural Utilities, 5.75%
                     notes, due 12/1/08 ...................              501,250

                                                                       1,196,500

Electronic Components - Semiconductors - 0.4%
     500,000       Motorola, Inc., 5.80%
                     notes, due 10/15/08 ..................              510,000

Fiber Optics - 1.0%
   1,250,000       Metromedia Fiber Network, Inc., 10.00%
                     senior notes, due 11/15/08+ ..........            1,292,188

Finance - Auto Loans - 3.3%
                   Ford Motor Credit Corp.:
   1,000,000         5.125%, notes, due 10/15/01 ..........              993,750
   1,000,000         5.375%, notes, due 10/15/02 ..........              995,000
   1,000,000         6.75%, notes, due 8/15/08 ............            1,082,500
                   General Motors Acceptance Corp.:
     400,000         5.75%, notes, due 11/10/03 ...........              401,500
     750,000         6.125%, notes, due 1/22/08 ...........              765,000

                                                                       4,237,750

Food - Diversified - 0.7%
     750,000       Ralston Purina Co., 7.875%
                     debentures, due 6/15/25 ..............              863,438

Food - Retail - 3.2%
$    500,000       Marsh Supermarkets, Inc., 8.875%
                     company guaranteed notes, due 8/1/07 .     $        523,125
     910,000       Pantry, Inc., 10.25%
                     company guaranteed notes, due 10/15/07              946,400
                   Safeway, Inc.:
     450,000         5.875%, notes, due 11/15/01 ..........              451,687
   1,400,000         6.50%, notes, due 11/15/08 ...........            1,438,500
     725,000       Star Markets Co., Inc., 13.00%
                     senior subordinated notes, due 11/1/04              815,625

                                                                       4,175,337

Funeral Services and Related Items - 0.4%
     250,000       Loewen Group, Inc., 7.60%
                     company guaranteed notes, due 6/1/08 .              201,563
     250,000       Service Corporation International, 7.70%
                     notes, due 4/15/09 ...................              276,875

                                                                         478,438

Home Furnishings - 0.3%
     390,000       Lifestyle Furnishings International, Inc.,
                     10.875%, company guaranteed notes,
                     due 8/1/06 ...........................              428,025

Hotels and Motels - 0.4%
     500,000       Marriot International, Inc., 6.625%
                     notes, due 11/15/03+ .................              501,250
Industrial Audio and Visual Products - 0.1%
     100,000       Unifrax Investment Corp., 10.50%
                     senior notes, due 11/1/03 ............              102,000

Insurance Brokers - 0.3%
     500,000       SIG Capital Trust I, 9.50%
                     company guaranteed notes, due 8/15/27               415,000

Life and Health Insurance - 0.6%
     742,000       Delphi Financial Group, Inc., 8.00%
                     senior notes, due 10/1/03 ............              792,085

Manufacturing - 0.4%
     500,000       Day International Group, Inc., 11.125%
                     senior notes, due 6/1/05 .............              510,000

Multimedia - 2.7%
     250,000       News America Holdings, Inc., 7.70%
                     debentures, due 10/30/25 .............              270,000
                   Time Warner, Inc.:
   1,000,000         8.18%, notes, due 8/15/07 ............            1,157,500
   1,000,000         6.95%, company guaranteed notes,
                     due 1/15/28 ..........................            1,053,750
   1,000,000       Walt Disney Co. (The), 6.75%
                     senior notes, due 3/30/06 ............            1,082,500

                                                                       3,563,750

Music/Clubs - 0.4%
     150,000       Selmer Co., Inc., 11.00%
                     senior subordinated notes, due 5/15/05              160,312
     880,000       V2 Music Holdings PLC, zero coupon
                     senior discount notes, due 4/15/08+ ..              415,985

                                                                         576,297

See Notes to Schedules of Investments.

                                      Janus Aspen Series / December 31, 1998  35
<PAGE>

Janus | Aspen Flexible Income Portfolio

SCHEDULE OF INVESTMENTS (continued)

Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Networking Products - 0.4%
 $   500,000       Anixter International, Inc., 8.00%
                     company guaranteed notes, due 9/15/03      $        528,125

Office Automation and Equipment - 0.4%
     500,000       Dictaphone Corp., 11.75%
                     senior subordinated notes, due 8/1/05               486,250

Paint and Related Products - 0.4%
     500,000       Sherwin-Williams Co., 6.85%
                     notes, due 2/1/07 ....................              545,000

Physical Therapy and Rehabilitation Centers - 2.4%
                   HEALTHSOUTH Corp.:
   1,500,000         9.50%, senior subordinated notes,
                     due 4/1/01 ...........................            1,552,500
   1,500,000         7.00%, senior notes, due 6/15/08 .....            1,498,125

                                                                       3,050,625

Property and Casualty Insurance - 0.7%
     500,000       First American Capital Trust, 8.50%
                     company guaranteed notes, due 4/15/12               586,250
     350,000       Orion Capital Corp., 7.25%
                     senior notes, due 7/15/05 ............              371,437

                                                                         957,687

Radio - 0.4%
     440,000       Chancellor Media Corp., 9.00%
                     senior subordinated notes, due 10/1/08              466,400

Recreational Centers - 1.1%
   1,500,000       Bally Total Fitness Holding Corp., 9.875%
                     senior subordinated notes, due 10/15/07           1,466,250

Reinsurance - 0.4%
     500,000       Veritas Capital Trust, 10.00%
                     company guaranteed notes, due 1/1/28 .              455,000

Retail - Regional Department Stores - 4.4%
                   Fred Meyer, Inc.:
   2,000,000         7.15%, company guaranteed notes,
                     due 3/1/03 ...........................            2,080,000
   3,385,000         7.45%, company guaranteed notes,
                     due 3/1/08 ...........................            3,655,800

                                                                       5,735,800

Retail - Restaurants - 2.6%
     500,000       Carrols Corp., 9.50%
                     senior subordinated notes, due 12/1/08+             508,750
   1,500,000       McDonald's Corp., 6.375%
                     debentures, due 1/8/28 ...............            1,561,875
     500,000       Perkins Family Restaurant, L.P., 10.125%
                     senior notes, due 12/15/07 ...........              533,125
     250,000       ROMACORP Inc., 12.00%
                     senior notes, due 7/1/06+ ............              244,687
     500,000       Tricon Global Restaurants, Inc., 7.65%
                     senior notes, due 5/15/08 ............              525,000

                                                                       3,373,437

Satellite Telecommunications - 0.6%
     250,000       Digital Television Services L.L.C., 12.50%
                     company guaranteed notes, due 8/1/07 .              271,250
     500,000       PanAmSat Corp., 6.375%
                     notes, due 1/15/08 ...................              506,250

                                                                         777,500

Savings/Loan/Thrifts - 1.3%
                   Local Financial Corp.
$  1,650,000         11.00%, senior notes, due 9/8/04+ ....     $      1,668,563

Security Services - 0.8%
   1,000,000       Protection One Alarm Monitor, Inc., 7.375%
                     senior notes, due 8/15/05+ ...........            1,032,500

Super - Regional Banks - 1.6%
   2,000,000       Mellon Financial Co., 6.375%
                     subordinated notes, due 2/15/10 ......            2,097,500

Telecommunications Equipment - 0.7%
     480,000       Filtronic PLC, 10.00%
                     senior notes, due 12/1/05+ ...........              478,800
     500,000       Global Tele-Systems, Ltd., 9.875%
                     senior notes, due 2/15/05 ............              475,625

                                                                         954,425

Telecommunications Services - 3.1%
   2,000,000       LCI International, Inc., 7.25%
                     senior notes, due 6/15/07 ............            2,055,000
     750,000       Level 3 Communications, Inc., 9.125%
                     senior notes, due 5/1/08 .............              744,375
     750,000       Metricom, Inc., 8.00%
                     convertible subordinated notes,
                     due 9/15/03 ..........................              480,000
     600,000       Talton Holdings, Inc., 11.00%
                     company guaranteed notes, due 6/30/07               569,250
     225,000       Versatel Telecom B.V., 13.25%
                     notes, due 5/15/08+ ..................              223,313

                                                                       4,071,938

Telephone - Integrated - 1.6%
     300,000       Dobson Wireline Co., 12.25%
                     senior notes, due 6/15/08 ............              276,750
     750,000       NEXTLINK Communications, Inc., 10.75%
                     senior notes, due 11/15/08+ ..........              768,750
   1,000,000       Qwest Communications International, Inc.,
                     7.50%, senior notes, due 11/1/08+ ....            1,043,750

                                                                       2,089,250

Telephone - Local - 0.4%
     500,000       Bellsouth Telecommunication, Inc., 6.375%
                     debentures, due 6/1/28 ...............              518,750

Telephone - Long Distance - 1.7%
     500,000       Esprit Telecom Group PLC, 11.50%
                     senior notes, due 12/15/07 ...........              514,375
                   MCI Worldcom, Inc.:
     500,000         6.40%, senior notes, due 8/15/05 .....              518,750
   1,000,000         7.75%, notes, due 4/1/07 .............            1,123,750

                                                                       2,156,875

Television - 2.3%
   1,050,000       Dialog Corp. PLC, 11.00%
                     senior subordinated notes, due 11/15/07           1,042,125
                   News America, Inc.:
     750,000         6.625%, senior notes, due 1/9/08 .....              770,625
   1,000,000         7.30%, debentures, due 4/30/28 .......            1,028,750
     150,000       Pegasus Media Communications, 12.50%
                     notes, due 7/1/05 ....................              164,625

                                                                       3,006,125

See Notes to Schedules of Investments.

36  Janus Aspen Series / December 31, 1998
<PAGE>

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Trucking and Leasing - 0.4%
$    500,000       Ryder System, Inc., 6.60%
                     notes, due 11/15/05 ..................     $        505,625
- --------------------------------------------------------------------------------
Total Corporate Bonds (cost $78,890,024) ..................           80,351,176
- --------------------------------------------------------------------------------
Foreign Bonds - 1.6%
CAD
   2,000,000       Canadian National Government, 6.00%
                     debentures, due 6/1/08** .............            1,409,428
DEM
   1,000,000       Esprit Telecom Group PLC, 11.50%
                     senior notes, due 12/15/07** .........              606,415
- --------------------------------------------------------------------------------
Total Foreign Bonds (cost $1,985,972) .....................            2,015,843
- --------------------------------------------------------------------------------
Preferred Stocks - 2.4%
Computer Software - 0.6%
         851       Concentric Network Corp. - Series B, 13 50%           714,840

Savings/Loan/Thrifts - 0.8%
      35,000       Chevy Chase Savings, 13.00% ............            1,050,000

Telecommunications Services - 1.0%
      30,000       Qwest Trends Trust, convertible, 5.75%+             1,410,000
- --------------------------------------------------------------------------------
Total Preferred Stocks (cost $3,104,871) ..................            3,174,840
- --------------------------------------------------------------------------------
Warrants - 0%
Consumer Products - 0%
         450       Spin Cycle, Inc. - expires 5/1/05* .....                    0

Music/Clubs - 0%
         880       V2 Music Holdings PLC
                     -  expires 4/15/08*,+ ................                    0
- --------------------------------------------------------------------------------
Total Warrants (cost $0) ..................................                    0
- --------------------------------------------------------------------------------
U.S. Government Obligations - 22.3%
                   U.S. Treasury Notes:
$  3,000,000         4.625%, due 12/31/00 .................            3,004,200
  10,000,000         6.125%, due 8/15/07 ..................           10,941,100
  13,500,000         5.625%, due 5/15/08** ................           14,406,525
     500,000         4.75%, due 11/15/08 ..................              503,575
- --------------------------------------------------------------------------------
Total U.S. Government Obligations (cost $27,991,868) ......           28,855,400
- --------------------------------------------------------------------------------
U.S. Government Agencies - 9.2%
                   Federal Home Loan Bank System
   2,000,000         5.125%, due 9/15/03 ..................            2,003,560
                   Freddie Mac
  10,000,000         4.70%, 1/4/99 ........................            9,996,083
- --------------------------------------------------------------------------------
Total U.S. Government Agencies (cost $12,017,847) .........           11,999,643
- --------------------------------------------------------------------------------
Total Investments (total cost $123,990,582) - 97.5% .......          126,396,902
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 2 5%          3,197,240
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $    129,594,142
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Financial Futures - Short
90 Contracts       U.S. Treasury - 10 year bond, expires
                     March 1999, principal amount
                     $10,741,913 value $10,724,063,
                     cumulative appreciation ..............     $         17,850
- --------------------------------------------------------------------------------

Summary of Investments by Country, December 31, 1998

Country                       % of Investment Securities          Market Value
- --------------------------------------------------------------------------------
Canada                                     1.1%                 $      1,409,428
United Kingdom                             1.2%                        1,536,775
United States++                           97.7%                      123,450,699
- --------------------------------------------------------------------------------
Total                                    100.0%                 $    126,396,902

++Includes Short-Term Securities (89.8% excluding Short-Term Securities)

Forward Currency Contracts, Open at December 31, 1998

Currency Sold and                  Currency            Currency     Unrealized
Settlement Date                  Units Sold     Value in $ U.S.    Gain/(Loss)
- --------------------------------------------------------------------------------
Canadian Dollar 10/8/99           2,040,000         $ 1,335,166      ($16,198)
German Deutschemark
  3/5/99                            825,000             496,988       (29,221)
- --------------------------------------------------------------------------------
Total                                               $ 1,832,154      ($45,419)

See Notes to Schedules of Investments.

                                      Janus Aspen Series / December 31, 1998  37
<PAGE>

Janus | Aspen High-Yield Portfolio

Sandy R. Rufenacht
portfolio manager

Extreme  volatility in the stock and bond markets  during the second half of the
year provided a difficult backdrop for high-yield securities in 1998. For the 12
months ended December 31, 1998, Janus Aspen High-Yield Portfolio posted a return
of 1.26% for the  Institutional  Shares and 0.67% for the Retirement  Shares. By
contrast,  the Lehman Brothers High-Yield Bond Index returned 1.60% for the same
period.(1)

In the first half of the year, the high-yield  market benefited from strength in
the stock market,  with which it shares a close correlation.  However, an excess
supply  of new  high-yield  issuance  limited  gains  for much of the  category.
Furthermore,  from August through October, the markets were roiled by increasing
concerns regarding the effects of the Asian financial crisis on the U.S. economy
and fears about the Brazilian  banking  system.  Investors  were also caught off
guard by  Russia's  devaluation  of its  currency  and  default on its debt.  In
particular, a number of large hedge funds were forced to liquidate many of their
highly leveraged positions.  As they did so, the spread, or difference,  between
the yields on corporate bonds and the yields on Treasuries widened considerably.
At the same time, increased volatility caused many investors to shift assets out
of riskier  investments and into those considered to be safer.  High-yield bonds
were particularly hurt by this turn of events.

In the fourth quarter, U.S. bond and equity markets rebounded sharply, primarily
in response to three cuts in short-term  interest  rates by the Federal  Reserve
Board. The high-yield market participated in this recovery,  although not nearly
to the same extent as  investment-grade  bonds,  as many investors  continued to
avoid investments perceived to be risky.

Throughout  the year our strategy has been to try to shield the  Portfolio  from
the effects of the Asian  slowdown by  emphasizing  the bonds of companies  with
primarily  U.S.-based  businesses.  At the same time, we avoided  companies that
tend to be adversely affected by low-cost Asian imports of industrial  materials
such as steel, paper, and chemicals.  In the third and fourth quarters,  we also
upgraded many of the Portfolio's holdings with higher-quality issues.

For example,  in October, as investors demanded higher spreads to compensate for
what they  perceived  to be a riskier  investment  environment,  the  difference
between yields on investment-grade bonds and yields on Treasuries widened to the
extent that the former were  trading  roughly 300 basis points above the curve -
very  close to the  350-basis-point  spread  at  which  high-yield  issues  were
trading.  We took  advantage of this  dislocation in the markets to add some BB-
and  BBB-rated  issues  to the  Portfolio,  thereby  improving  quality  without
sacrificing much yield potential.  Finally, we sharpened our focus on buying the
bonds of  larger,  public  companies  because  they tend to be more  capable  of
withstanding  liquidity crunches of the sort we had just experienced.  In short,
we took quite a few defensive steps to protect our investors during the year.

The  supermarket  industry  performed  well for the Portfolio  during 1998.  One
example was Star Markets,  which was purchased by J.  Sainsbury - a London-based
company.  The  acquisition  benefited our Star Markets  holdings  because of the
higher-rated,  less-leveraged  status of its acquirer.  Another holding that did
well was Isle of  Capri.  The  company  is  building  a  casino  in Black  Hawk,
Colorado,  not far from Denver.  Because of our proximity to it, we were able to
monitor  this  project  very  closely,  and the  issue  did well for us.  On the
downside,  Telegroup is a telecommunications  company that experienced liquidity
problems during the fall. Sparkling Spring Water Group also hurt performance, as
the company saw a decline in demand for its bottled water.

My outlook  calls for the  economy  to grow at a much  slower  pace,  though not
enough to bring on a recession.  Together with low inflation and interest rates,
moderate  economic growth should provide a reasonably  positive  environment for
both stocks and high-yield bonds.  However,  the markets will continue to punish
companies that miss their earnings  estimates.  Therefore,  it will be important
going  forward to be vigilant  about  buying  quality and keeping in close touch
with management about a company's prospects.
As always,  thank you for your  continued  investment in Janus Aspen  High-Yield
Portfolio.

Portfolio Profile                    December 31, 1998         December 31, 1997
- --------------------------------------------------------------------------------
Weighted Average Maturity                 5.1 Yrs.                 6.8 Yrs.
Average Modified Duration*                3.7 Yrs.                 4.5 Yrs.
30-Day Average Yield
  Institutional Shares**                     8.31%                    8.10%
    Without Reimbursement**                    N/A                    7.04%
  Retirement Shares**                        7.89%                    7.68%
    Without Reimbursement**                    N/A                    6.60%
Average Rating                                   B                       B+
- --------------------------------------------------------------------------------
*A theoretical measure of price volatility.
** Yields will fluctuate.

(1) All returns include reinvested dividends.

38  Janus Aspen Series / December 31, 1998
<PAGE>

Average Annual Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 5/1/96)
  1 Year                                                      1.26%
  From Inception                                             10.97%
- --------------------------------------------------------------------------------
Lehman Brothers High-Yield Bond Index
  1 Year                                                      1.60%
  From Inception Date of Institutional Shares                 7.15%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/97)
  1 Year                                                      0.67%
  From Portfolio Inception (unaudited)                        8.25%
- --------------------------------------------------------------------------------
Returns shown for  Retirement  Shares for periods  prior to their  inception are
derived from the historical  performance of  Institutional  Shares,  adjusted to
reflect the higher operating expenses of Retirement Shares.

Note: Performance of the Retirement  Shares is lower from the performance  shown
      on this graph for the  Institutional  Shares,  based upon the higher  fees
      paid by shareholders investing in this class.

Performance Overview(1)

[GRAPHIC OMITTED]

A graphic comparison of the change in value of a hypothetical $10,000 investment
in Janus  Aspen  High-Yield  Portfolio  -  Institutional  Shares  and the Lehman
Brothers High-Yield Bond Index. Janus Aspen High-Yield Portfolio - Institutional
Shares is represented by a shaded area of blue. The Lehman  Brothers  High-Yield
Bond Index is represented by a solid black line. The "y" axis reflects the value
of the investment. The "x" axis reflects the computation periods from inception,
May 1, 1996,  through  December 31, 1998. The upper right quadrant  reflects the
ending value of the hypothetical  investment in Janus Aspen High-Yield Portfolio
- - Institutional  Shares ($13,184) as compared to the Lehman Brothers  High-Yield
Bond Index ($12,508).

Average Annual Total Return 
for the periods ended December 31, 1998 
One Year, 1.26% 
Since 5/1/96,* 10.97%

Janus Aspen High-Yield Portfolio
- - Institutional Shares - $13,184

Lehman Brothers
High-Yield Bond Index - $12,508

*The Portfolio's inception date.
Source - Lipper Analytical Services, Inc. 1998.

(1)  All returns reflect reinvested  dividends.  The Portfolio's  securities may
     differ significantly from the securities in the Index. Index returns do not
     include  taxes or  dividends  and interest  payments or operating  expenses
     necessary to maintain a portfolio  consisting of the same  securities  that
     are in the Index.  These returns do not reflect the charges and expenses of
     any particular  insurance product or qualified plan.  Investment return and
     principal value will fluctuate so that shares, when redeemed,  may be worth
     more or less than their  original cost.  The adviser  voluntarily  waives a
     portion of the Portfolio's  expenses.  Without such waiver, the Portfolio's
     total returns for each class would have been lower.  Past  performance does
     not guarantee future results.

SCHEDULE OF INVESTMENTS

Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Corporate Bonds - 64.6%
Advertising Services - 0.4%
$     13,000       Outsourcing Services Group, 10.875%
                     senior subordinated notes, due 3/1/06+     $         12,317

Auto Repair Centers - 3.3%
     100,000       Diamond Triumph Autoglass, Inc., 9.25%
                     senior notes, due 4/1/08+ ............               99,000

Building - Heavy Construction - 0.5%
      15,000       Iron Age Corp., 9.875%
                     company guaranteed notes, due 5/1/08 .               13,650

Building - Residential and Commercial - 0.9%
      28,000       Toll Corp., 9.50%
                     senior subordinated notes, due 3/15/03               28,350

Building and Construction Products - 0.8%
      25,000       Generac Portable Products, L.L.C., 11.25%
                     senior subordinated notes, due 7/1/06                24,750

Cable Television - 3.7%
      15,000       Adelphia Communications Corp., 8.375%
                     senior notes, due 2/1/08+ ............               15,525
      50,000       Classic Cable, Inc., 9.875%
                     senior subordinated notes, due 8/1/08+               52,000
      25,000       Fundy Cable, Ltd., 11.00%
                     senior notes, due 11/15/05 ...........               26,563
       5,000       Galaxy Telecom, L.P., 12.375%
                     senior subordinated notes, due 10/1/05                5,550
      10,000       Rifkin Acquisition Partners, L.P., 11.125%
                     senior subordinated notes, due 1/15/06               10,937

                                                                         110,575

Casino Hotels - 2.1%
$     30,000       Santa Fe Hotel, Inc., 11.00%
                     first mortgage notes, due 12/15/00 ...     $         29,138
      10,000       Station Casinos, Inc., 10.125%
                     senior subordinated notes, due 3/15/06               10,450
      25,000       Venetian Casino Resort, L.L.P., 12.25%
                     company guaranteed notes, due 11/15/04               23,437

                                                                          63,025

Casino Services - 1.8%
      50,000       Isle of Capri Black Hawk, L.L.C., 13.00%
                     first mortgage bonds, due 8/31/04 ....               53,000

Cellular Telecommunications - 0.3%
      25,000       Telesystem International Wireless, Inc., zero
                     coupon, senior discount notes, due 11/1/07            9,344

Containers - Metal and Glass - 0.5%
      15,000       Ball Corp., 7.75%
                     senior notes, due 8/1/06 .............               15,750

Containers - Paper and Plastic - 1.2%
      35,000       Plastic Containers, Inc., 10.00%
                     senior notes, due 12/15/06 ...........               36,706

Distribution and Wholesale - 1.7%
      50,000       Aviation Sales Co., 8.125%
                     company guaranteed notes, due 2/15/08                49,500

Electric - Integrated - 0.9%
      25,000       Niagara Mohawk Power Corp., 7.75%
                     senior notes, due 10/1/08 ............               27,062

See Notes to Schedules of Investments

                                      Janus Aspen Series / December 31, 1998  39
<PAGE>

Janus | Aspen High-Yield Portfolio

SCHEDULE OF INVESTMENTS (continued)

Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Fiber Optics - 0.4%
$     10,000       Metromedia Fiber Network, Inc., 10.00%
                     senior notes, due 11/15/08 ...........     $         10,337

Finance - Other Services - 0.2%
      20,000       SF Holdings Group, Inc., zero coupon
                     senior notes, due 3/15/08 ............                6,575

Food - Diversified - 2.1%
      85,000       Richmont Marketing Specialists, Inc.,
                     10.125%, senior subordinated notes,
                     due 12/15/07+ ........................               62,688

Food - Retail - 1.7%
      45,000       Star Markets Co., Inc., 13.00%
                     senior subordinated notes, due 11/1/04               50,625

Gambling-Non Hotel Casinos - 1.8%
      25,000       Casino America, Inc., 12.50%
                     senior notes, due 8/1/03 .............               27,750
      25,000       Lady Luck Gaming Corp., 11.875%
                     first mortgage notes, due 3/1/01 .....               25,500

                                                                          53,250

Hotels and Motels - 1.2%
      35,000       Hard Rock Hotel, Inc., 9.25%
                     senior subordinated notes, due 4/1/05                35,000

Instruments - Controls - 1.2%
      35,000       Imo Industries, Inc., 11.75%
                     senior subordinated notes, due 5/1/06                36,225

Internet Software - 1.7%
      50,000       Exodus Communications, Inc., 11.25%
                     senior notes, due 7/1/08 .............               50,250

Machinery - General Industrial - 1.4%
      40,000       Fairfield Manufacturing Co., Inc., 11.375%
                     senior subordinated notes, due 7/1/01                41,000

Manufacturing - 3.0%
      80,000       Foamex International, Inc., 13.50%
                     senior subordinated notes, due 8/15/05+              90,400

Medical - Hospital - 0.9%
      25,000       Tenet Healthcare Corp., 8.125%
                     senior subordinated notes, due 12/1/08+              25,844

Medical Products - 0.2%
       6,000       Universal Hospital Service, Inc., 10.25%
                     senior notes, due 3/1/08+ ............                5,273

Music/Clubs - 1.1%
      15,000       SFX Entertainment, Inc., 9.125%
                     company guaranteed notes, due 2/1/08 .               14,925
      40,000       V2 Music Holdings PLC, zero coupon
                     senior discount notes, due 4/15/08+ ..               18,908

                                                                          33,833

Oil  Companies - Exploration and Production - 0.7%
      20,000       Nuevo Energy Co., 9.50%
                     senior subordinated notes, due 4/15/06               19,550

Physical Therapy and Rehabilitation Centers - 0.5%
      15,000       HEALTHSOUTH Corp., 6.875%
                     senior notes, due 6/15/05 ............               15,169

Publishing - Books - 1.2%
$     35,000       TransWestern Publishing Company, L.P.,
                     9.625%, senior subordinated notes,
                     due 11/15/07+ ........................     $         36,444

Radio - 1.4%
      39,000       SFX Broadcasting, Inc., 10.75%
                     senior subordinated notes, due 5/15/06               42,997

Reinsurance - 0.3%
      10,000       Veritas Holdings GmbH, 9.625%
                     senior notes, due 12/15/03 ...........                9,975

Retail - Convenience Stores - 0.7%
      20,000       Core-Mark International, Inc., 11.375%
                     senior subordinated notes, due 9/15/03               20,350

Retail - Discount - 1.7%
      52,000       Pamida,Inc., 11.75%
                     senior subordinated notes, due 3/15/03               49,660

Retail - Diversified - 1.1%
      35,000       Eye Care Centers of America, Inc., 9.125%
                     senior subordinated notes, due 5/1/08+               33,600

Retail - Drug Store - 0.8%
      25,000       Community Distributors, Inc., 10.25%
                     company guaranteed notes, due 10/15/04               24,250

Retail - Internet - 1.4%
      60,000       Amazon.com, Inc., zero coupon
                     senior discount notes, due 5/1/08 ....               40,200

Retail - Mail Order - 1.5%
      40,000       Herff Jones, Inc., 11.00%
                     senior subordinated notes, due 8/15/05               43,500

Satellite Telecommunications - 1.4%
      25,000       Digital Television Services, L.L.C., 12 50%
                     company guaranteed notes, due 8/1/07 .               27,125
      15,000       Echostar Communications Corp., 12.875%
                     senior discount notes, due 6/1/04 ....               15,394

                                                                          42,519

Savings/Loan/Thrifts - 2.5%
      75,000       Local Financial Corp., 11.00%
                     senior notes, due 9/8/04+ ............               75,844

Telecommunication Services - 7.2%
      15,000       Focal Communications Corp., 12.125%
                     senior discount notes, due 2/15/08 ...                7,838
      15,000       Global Crossing Holding, Ltd., 9.625%
                     company guaranteed notes, due 5/15/08                15,900
      50,000       IDT Corp., 8.75%
                     senior notes, due 2/15/06 ............               46,125
      88,000       Level 3 Communications, Inc., 9.125%
                     senior notes, due 5/1/08 .............               87,340
      15,000       RSL Communications PLC, 10.50%
                     senior notes, due 11/15/08 ...........               14,550
      25,000       SBA Communications Corp., zero coupon
                     senior discount notes, due 3/1/08 ....               14,594
      47,000       Telegroup, Inc., zero coupon
                     senior discount notes, due 11/1/04 ...               27,671

                                                                         214,018

See Notes to Schedules of Investments.

40  Janus Aspen Series / December 31, 1998
<PAGE>

Shares or Principal Amount                                          Market Value
- --------------------------------------------------------------------------------
Telephone - Integrated - 2.3%
$     25,000       Dobson Wireline Co., 12.25%
                     senior notes, due 6/15/08 ............     $         23,062
      30,000       Intermedia Communications, Inc.,
                     zero coupon, senior discount notes,
                     due 7/15/07 ..........................               20,962
      25,000       NEXTLINK Communications, Inc., 10.75%
                     senior notes, due 11/15/08 ...........               25,625

                                                                          69,649

Telephone - Local - 1.1%
      50,000       e.Spire Communications, Inc., zero coupon
                     senior discount notes, due 4/1/06 ....               34,000

Television - 0.4%
      10,000       Price Communications Corp., 11.75%
                     senior subordinated notes, due 7/15/07               10,525

Textile - Products - 0.9%
      20,000       Glenoit Corp., 11.00%
                     company guaranteed notes, due 4/15/07                18,700
      30,000       Steel Heddle Group, Inc., zero coupon
                     debentures, due 6/1/09+ ..............                9,562

                                                                          28,262

Transportation - Services - 1.0%
      30,000       Atlantic Express, Inc., 10.75%
                     company guaranteed notes, due 2/1/04 .               30,450

Water - 0.8%
      25,000       Sparkling Spring Water Group, 11.50%
                     senior subordinated notes, due 11/15/07              24,750

Wire and Cable Products - 0.7%
      20,000       International Wire Group, Inc., 11.75%
                     senior subordinated notes, due 6/1/05                21,200
- --------------------------------------------------------------------------------
Total Corporate Bonds (cost $2,013,981) ...................            1,931,241
- --------------------------------------------------------------------------------
Preferred Stock - 3.0%
Savings/Loan/Thrifts - 0.6%
         600       Chevy Chase Savings - Series A, 13.00% .               18,000

Telecommunication Services - 2.4%
       1,500       Qwest Trends Trust, convertible, 5.75%+                70,500
- --------------------------------------------------------------------------------
Total Preferred Stock (cost $81,225) ......................               88,500
- --------------------------------------------------------------------------------
Common Stock - 0%
          40       SF Holdings Group, Inc. * (cost $0) ....     $              0
- --------------------------------------------------------------------------------
Warrants - 0%
          40       V2 Music Holdings PLC
                     - expires 4/15/08*,+ (cost $0) .......                    0
- --------------------------------------------------------------------------------
U.S. Government Obligations - 3.3%
                   U.S. Treasury Notes:
$     50,000         4.25%, due 11/15/03 ..................               49,340
      50,000         4.75%, due 11/15/08 ..................               50,358
- --------------------------------------------------------------------------------
Total U.S. Government Obligations (cost $100,678) .........               99,698
- --------------------------------------------------------------------------------
U.S Government Agency - 28.3%
                   Freddie Mac
     845,000         4.70%, 1/4/99 (amortized cost $844,669)             844,669
- --------------------------------------------------------------------------------
Total Investments (total cost $3,040,553) - 99.2% .........            2,964,108
- --------------------------------------------------------------------------------
Cash, Receivables and Other Assets, net of Liabilities - 0 8%             23,639
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $      2,987,747
- --------------------------------------------------------------------------------

See Notes to Schedules of Investments.

                                      Janus Aspen Series / December 31, 1998  41
<PAGE>

Janus | Aspen Money Market Portfolio

[PHOTO]
Sharon S. Pichler
portfolio manager

For the fiscal  year ended  December  31,  1998,  Aspen Money  Market  Portfolio
returned  5.36%  for the  Institutional  Shares  and  4.85%  for the  Retirement
Shares.(1) The seven-day  current yield,  as of December 31, 1998, was 4.87% and
4.40% for the Institutional and Retirement Shares, respectively.

During  the first  half of the  year,  the  Federal  Reserve  continued  to hold
interest  rates steady  while  closely  monitoring  an economy that seemed to be
successfully  combining  strong  growth and benign  inflation.  For this reason,
domestic market volatility in the first and second quarters was driven primarily
by investor  perceptions  that the Asian crisis could have a negative  impact on
U.S. growth and corporate earnings.  However,  financial turmoil in the Far East
was  generally a positive  for the markets  because it kept global  inflationary
pressures in check.  This  positive  turned into a negative in the third quarter
when renewed problems in Asia and financial  deterioration in Russia triggered a
worldwide  economic  slowdown.  Federal  Reserve policy shifted  dramatically in
response  to these  events,  resulting  in a trio of  interest  rate  cuts  that
ultimately drove U.S. money markets forward.

Early in the year,  my  strategy  was to  invest  primarily  in very  short-term
obligations, which are influenced more by changes in the federal funds rate than
by broader market forces.  Despite the market developments in the latter part of
the  year,  I haven't  substantially  changed  this  strategy  or  significantly
extended the maturity of the Portfolio. However, I did purchase some longer-term
paper  that  will  maintain  a  higher  yield  in  a  declining   interest  rate
environment.  Overall,  our performance has benefited from our strict discipline
of  detailed  credit  analysis  and our  careful  evaluation  of each  company's
risk-reward characteristics.

Going forward,  we'll continue to invest in  shorter-term  maturities as long as
the global outlook remains somewhat uncertain. At this time, market consensus is
that the Federal  Reserve will  probably  continue  lowering  interest  rates to
maintain  stability in the U.S. markets.  We could see another .25% reduction in
rates  by  next  spring.  I  believe  we're  positioned  to  capitalize  on this
possibility, while also retaining the flexibility that will allow us to react to
any changes that might arise in the economic landscape.

In closing,  I'd like to thank you for your continued  investment in Janus Aspen
Money Market Portfolio.

Average Annual Total Return(1)
For the Periods Ended December 31, 1998
- --------------------------------------------------------------------------------
Institutional Shares (Inception Date 5/1/95)
  1 Year                                                      5.36%
  From Inception                                              5.25%
- --------------------------------------------------------------------------------
Retirement Shares (Inception Date 5/1/97)
  1 Year                                                      4.85%
  From Inception (unaudited)                                  4.37%
- --------------------------------------------------------------------------------
Returns shown for  Retirement  Shares for periods  prior to their  inception are
derived from the historical  performance of  Institutional  Shares,  adjusted to
reflect the higher operating expenses of Retirement Shares.

(1) All returns reflect reinvested dividends.

An  investment in the  Portfolio(s)  is not insured or guaranteed by the Federal
Deposit  Insurance  Corporation  or any other  government  agency.  Although the
Portfolio(s)  seeks to preserve the value of your investment at $1.00 per share,
it is possible to lose money by investing in the Portfolio.

42  Janus Aspen Series / December 31, 1998
<PAGE>

SCHEDULE OF INVESTMENTS

Principal Amount                                                    Market Value
- --------------------------------------------------------------------------------
Short-Term Corporate Notes - 23.0%
$  2,300,000       Countrywide Home Loans, Inc.
                     5.25%, 1/29/99 .......................     $      2,290,608
   2,000,000       Credit Suisse First Boston
                     4.875%, 5/7/99 .......................            1,965,875
   2,000,000       General Electric Capital Corp.
                     5.09%, 3/10/99 .......................            1,980,771
   2,000,000       Morgan Stanley Group, Inc.
                     4.92%, 3/26/99 .......................            1,977,040
     680,000       UBS Financial Corp.
                     5.17%, 1/8/99 ........................              679,317
- --------------------------------------------------------------------------------
Total Short-Term Corporate Notes (amortized cost $8,893,611)           8,893,611
- --------------------------------------------------------------------------------
Taxable Variable Rate Demand Notes - 24.5%
   3,000,000       Asset Partners, Inc.
                     5.20%, 11/1/27 .......................            3,000,000
     750,000       Chicago, Illinois Industrial Development
                     Revenue, (BTI, Inc. Project), Series B,
                     Variable Rate, 5.20%, 9/1/27 .........              750,000
   2,140,000       Kentucky Economic Development
                     Financing Authority Hospital Facilities
                     Revenue, (Highlands Regional Project),
                     Series B, Variable Rate, 5.75%, 8/1/03            2,140,000
   1,605,000       Michigan State Strategic Fund Limited
                     Obligation Revenue, (Wade Trim Group),
                     Variable Rate, 5.20%, 12/1/16 ........            1,605,000
   2,000,000       New York State Housing Finance Agency
                     Revenue, (750 Sixth Avenue Project),
                     Series B, Variable Rate, 5.25%, 11/1/31           2,000,000
- --------------------------------------------------------------------------------
Total Taxable Variable Rate Demand Notes (cost $9,495,000)             9,495,000
- --------------------------------------------------------------------------------
Floating Rate Notes - 24.0%
   2,000,000       American Honda Finance Corp.
                     5.3568%, 5/7/99+ .....................            1,999,264
   1,264,000       Barclays Bank PLC of New York
                     5.4856%, 6/2/99 ......................            1,263,260
   2,000,000       CIT Group, Inc.
                     4.93%, 11/2/99 .......................            1,999,673
   2,000,000       Citicorp
                     5.45%, 11/23/99 ......................            2,003,508
   2,000,000       Goldman Sachs Group, L.P.
                     5.2596%, 2/1/99+ .....................            1,999,938
- --------------------------------------------------------------------------------
Total Floating Rate Notes (cost $9,265,643) ...............            9,265,643
- --------------------------------------------------------------------------------
Certificate of Deposit - 5.2%
$  2,000,000       Credit Agricole Indosuez
                     5.75%, 4/16/99 (cost $2,003,332) .....     $      2,003,332
- --------------------------------------------------------------------------------
Put Bond - 7.1%
   2,765,000       Aurora, Colorado Centretch Metropolitan
                     District, Series B, Variable Rate, 5.65%,
                     12/1/99 (cost $2,765,000) ............            2,765,000
- --------------------------------------------------------------------------------
Bank Notes - 5.2%
   2,000,000       Morgan Guaranty Trust Co.
                     5.75%, 10/8/99 (cost $2,014,204) .....            2,014,204
- --------------------------------------------------------------------------------
Repurchase Agreement - 12.7%
   4,920,000       ABN AMRO Securities, Inc., 5.15%,
                     dated 12/31/98, maturing 1/4/99, to
                     be repurchased at $4,920,704,
                     collateralized by $4,823,474 in
                     Government National Mortgage
                     Association, 6.4945%, 2/20/28 with
                     a value of $5,018,401 (cost $4,920,000)           4,920,000
- --------------------------------------------------------------------------------
Total Investments (total cost $39,356,790) - 101.7% .......           39,356,790
- --------------------------------------------------------------------------------
Liabilities, net of Cash, Receivables and Other Assets - (1.7%)        (655,533)
- --------------------------------------------------------------------------------
Net Assets - 100% .........................................     $     38,701,257
- --------------------------------------------------------------------------------

See Notes to Schedules of Investments.

                                      Janus Aspen Series / December 31, 1998  43
<PAGE>

Statements of | Operations

<TABLE>
<CAPTION>
                                                          Janus Aspen   Janus Aspen   Janus Aspen   Janus Aspen
For the fiscal year or period               Janus Aspen   Aggressive     Capital     International   Worldwide    Janus Aspen
ended December 31, 1998                       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                                   $   3,648     $     808     $     226     $   1,482     $  10,446     $  13,219
  Dividends                                      3,904         1,531            81         2,535        22,161         4,408
  Foreign tax withheld                           (124)          (75)            --         (308)       (2,535)          (55)
- ------------------------------------------------------------------------------------------------------------------------------------
Total Investment Income                          7,428         2,264           307         3,709        30,072        17,572
- ------------------------------------------------------------------------------------------------------------------------------------
Expenses:
  Advisory fees                                  5,145         4,160           181         1,548        14,485         4,021
  Transfer agent fees and expenses                   2             8            --            --            24             4
  Registration fees                                 59             8             9            56            61             6
  System fees                                       16            20            11            14            20            21
  Custodian fees                                   120           126            21           366         1,361            75
  Insurance expense                                 10             8            --             2            21             3
  Audit fees                                        16             8            11            18             7             8
  Distribution fees - Retirement Shares             --            --            --            --             4             9
  Administrative fees - Retirement Shares           --            --            --            --             4             9
  Other expenses                                    10             6             5             5            19             7
- ------------------------------------------------------------------------------------------------------------------------------------
Total Expenses                                   5,378         4,344           238         2,009        16,006         4,163
Expense and Fee Offsets                           (11)          (21)           (1)           (3)          (19)          (19)
Net Expenses                                     5,367         4,323           237         2,006        15,987         4,144
Excess Expense Reimbursement                        --            --            --            --            --            -- 
Net Expenses After Reimbursement                 5,367         4,323           237         2,006        15,987         4,144
Net Investment Income/(Loss)                     2,061       (2,059)            70         1,703        14,085        13,428
- ------------------------------------------------------------------------------------------------------------------------------------
Net Realized and Unrealized Gain/
  (Loss) on Investments:
  Net realized gain/(loss) from
    securities transactions                     10,172        64,034       (3,801)      (11,118)      (32,014)       (1,251)
  Net realized gain/(loss) from
    foreign currency transactions                (441)       (1,868)            --       (3,112)      (25,926)           262
  Net realized gain/(loss) from
    futures contracts                               --            --            --         (439)       (2,812)            -- 
  Change in net unrealized appreciation/
    (depreciation) of investments              246,903       133,925        19,907        43,585       569,104       174,276
- ------------------------------------------------------------------------------------------------------------------------------------
Net Gain/(Loss) on Investments                 256,634       196,091        16,106        28,916       508,352       173,287
Net Increase in Net Assets
  Resulting from Operations                  $ 258,695     $ 194,032     $  16,176     $  30,619     $ 522,437     $ 186,715
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
                                            Janus Aspen  Janus Aspen    Janus Aspen                             
For the fiscal year or period                  Equity     Growth and     Flexible     Janus Aspen   Janus Aspen 
ended December 31, 1998                        Income       Income        Income       High-Yield   Money Market
(all numbers in thousands)                   Portfolio    Portfolio(1)   Portfolio     Portfolio     Portfolio   
- ------------------------------------------------------------------------------------------------------------------------------------
Investment Income:
<S>                                          <C>           <C>           <C>           <C>           <C>      
  Interest                                   $      22     $      24     $   6,103     $     285     $   1,759
  Dividends                                         59            13            39             3            -- 
  Foreign tax withheld                             (1)            --            --            --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total Investment Income                             80            37         6,142           288         1,759
- ------------------------------------------------------------------------------------------------------------------------------------
Expenses:
  Advisory fees                                     42            13           563            25            79
  Transfer agent fees and expenses                  --             2            --            --            -- 
  Registration fees                                  9             3             2             2             1
  System fees                                       14             7            15            12             9
  Custodian fees                                    24            24            42            21             9
  Insurance expense                                 --            --             1            --            -- 
  Audit fees                                        12             8             6             7             7
  Distribution fees - Retirement Shares             --            --            --            --            -- 
  Administrative fees - Retirement Shares           --            --            --            --            -- 
  Other expenses                                     3            --             4             2             4
- ------------------------------------------------------------------------------------------------------------------------------------
Total Expenses                                     104            57           633            69           109
Expense and Fee Offsets                             --            --           (4)            --            -- 
Net Expenses                                       104            57           629            69           109
Excess Expense Reimbursement                      (34)          (33)            --          (36)            -- 
Net Expenses After Reimbursement                    70            24           629            33           109
Net Investment Income/(Loss)                        10            13         5,513           255         1,650
- ------------------------------------------------------------------------------------------------------------------------------------
Net Realized and Unrealized Gain/
  (Loss) on Investments:
  Net realized gain/(loss) from
    securities transactions                         61         (119)           924          (50)            -- 
  Net realized gain/(loss) from
    foreign currency transactions                    4            --           (9)           (1)            -- 
  Net realized gain/(loss) from
    futures contracts                               --            --            49            --            -- 
  Change in net unrealized appreciation/
    (depreciation) of investments                2,297         1,005           680         (141)            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Gain/(Loss) on Investments                   2,362           886         1,644         (192)            -- 
Net Increase in Net Assets
  Resulting from Operations                  $   2,372     $     899     $   7,157     $      63     $   1,650
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
(1) Period May 1, 1998, (inception) to December 31, 1998.

See Notes to Financial Statements.

44 and 45  Janus Aspen Series / December 31, 1998
<PAGE>

Statements of | Assets & Liabilities

<TABLE>
<CAPTION>
As of December 31, 1998                                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                     $  780,498    $  514,912    $   52,453    $  256,678    $2,128,952    $  698,506

  Investments at value:                   $1,101,821    $  762,128    $   72,625    $  313,205    $2,905,157    $  893,121
    Cash                                         169           174            30           118           534           176
    Receivables:
      Investments sold                         1,887        28,291            --           120         1,806           689
      Portfolio shares sold                      777            92         1,594           373         4,466         3,553
      Dividends                                  263           114             4           241         1,743           556
      Interest                                    --            --            --            --            --         4,534
    Other assets                                   1             2             1            --            --             1
    Variation margin                              --            --            --            --            --            -- 
  Forward currency contracts                      --           377            --            --            --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total Assets                               1,104,918       791,178        74,254       314,057     2,913,706       902,630
- ------------------------------------------------------------------------------------------------------------------------------------
Liabilities:
  Payables:
    Investments purchased                         34        10,029            --         1,806        10,379         2,288
    Portfolio shares repurchased                 712         7,736            --            20         2,426            70
    Advisory fees                                555           426            35           165         1,512           491
  Accrued expenses                                50            27            12            77           144            24
  Forward currency contracts                      --            --            --           862         3,033            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total Liabilities                              1,351        18,218            47         2,930        17,494         2,873
Net Assets                                $1,103,567    $  772,960    $   74,207    $  311,127    $2,896,212    $  899,757
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets - Institutional Shares         $1,103,549    $  772,943    $   74,187    $  311,110    $2,890,375    $  882,495
  Shares Outstanding, $0.001 Par Value
    (unlimited shares authorized)             46,885        27,964         3,720        14,623        99,373        39,226
- ------------------------------------------------------------------------------------------------------------------------------------
  Net Asset Value Per Share               $    23.54    $    27.64    $    19.94    $    21.27    $    29.09    $    22.50
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets - Retirement Shares            $       18    $       17    $       20    $       17    $    5,837    $   17,262
  Shares Outstanding, $0.001 Par Value
    (unlimited shares authorized)                754           620         1,000           808       200,866       764,143
- ------------------------------------------------------------------------------------------------------------------------------------
  Net Asset Value Per Share               $    23.45    $    27.42    $    19.86    $    21.27    $    29.06    $    22.59
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
As of December 31, 1998                  Janus Aspen   Janus Aspen   Janus Aspen                              
(all numbers in thousands except           Equity      Growth and     Flexible     Janus Aspen   Janus Aspen 
Retirement Shares outstanding and          Income        Income        Income       High-Yield   Money Market
net asset value per share)                Portfolio    Portfolio(1)   Portfolio     Portfolio     Portfolio   
- ------------------------------------------------------------------------------------------------------------------------------------
Assets:
<S>                                       <C>           <C>           <C>           <C>           <C>       
  Investments at cost                     $    6,503    $    5,591    $  123,991    $    3,041    $   39,357
                                     
  Investments at value:                   $    8,880    $    6,596    $  126,397    $    2,964    $   39,357
    Cash                                           5            30           539             9             1
    Receivables:
      Investments sold                             9           100           515            --            -- 
      Portfolio shares sold                      164            61           459            10             7
      Dividends                                    7             3            --            --            -- 
      Interest                                     9             1         1,878            45           228
    Other assets                                   9             7            --            --            -- 
    Variation margin                              --            --             3            --            -- 
  Forward currency contracts                      --            --            --            --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total Assets                                   9,083         6,798       129,791         3,028        39,593
- ------------------------------------------------------------------------------------------------------------------------------------
Liabilities:
  Payables:
    Investments purchased                         25           358            72            30            -- 
    Portfolio shares repurchased                  --            --             3            --           886
    Advisory fees                                  5             3            69             5             9
  Accrued expenses                                16            12             8             5           (3)
  Forward currency contracts                      --            --            45            --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total Liabilities                                 46           373           197            40           892
Net Assets                                $    9,037    $    6,425    $  129,594    $    2,988    $   38,701
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets - Institutional Shares         $    9,017    $    6,413    $  129,582    $    2,977    $   38,690
  Shares Outstanding, $0.001 Par Value
    (unlimited shares authorized)                465           536        10,750           274        38,690
- ------------------------------------------------------------------------------------------------------------------------------------
  Net Asset Value Per Share               $    19.41    $    11.96    $    12.05    $    10.85    $     1.00
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets - Retirement Shares            $       20    $       12    $       12    $       11    $       11
  Shares Outstanding, $0.001 Par Value
    (unlimited shares authorized)              1,013         1,000           989         1,039        10,802
- ------------------------------------------------------------------------------------------------------------------------------------
  Net Asset Value Per Share               $    19.28         11.94    $    12.05    $    10.84    $     1.00
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
(1) Period May 1, 1998, (inception) to December 31, 1998.

See Notes to Financial Statements.

46 and 47  Janus Aspen Series / December 31, 1998
<PAGE>

Statements of | Changes in Net Assets

<TABLE>
<CAPTION>
                                                          Janus Aspen                 Janus Aspen                 Janus Aspen
                                                            Growth                 Aggressive Growth         Capital Appreciation
For the fiscal year or period ended                        Portfolio                   Portfolio                   Portfolio
December 31 (all numbers in thousands)                1998          1997          1998          1997          1998         1997(1)
- ------------------------------------------------------------------------------------------------------------------------------------
Operations:
<S>                                                <C>           <C>           <C>           <C>           <C>           <C>        
  Net investment income/(loss)                     $    2,061    $    4,350    $  (2,059)    $    (436)    $       70    $       25 
  Net realized gain/(loss)
    from investment transactions                        9,731        47,939        62,166           788       (3,801)         (146)
  Change in unrealized net appreciation
    or depreciation of investments                    246,903        39,125       133,925        56,805        19,907           265 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase in Net Assets
  Resulting from Operations                           258,695        91,414       194,032        57,157        16,176           144 
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends and Distributions to Shareholders:
  Net investment income*                              (1,969)       (4,361)            --            --          (40)          (21)
  Dividends (in excess of net investment income)*          --            --            --            --            --            -- 
  Net realized gain from investment transactions*    (48,597)       (9,976)            --            --            --            -- 
  Distributions (in excess of realized gains)              --            --            --            --            --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Decrease from Dividends and Distributions        (50,566)      (14,337)            --            --          (40)          (21)
- ------------------------------------------------------------------------------------------------------------------------------------
Capital Share Transactions:
  Shares sold
    Institutional Shares                              375,818       244,131       388,732       204,318        78,521         9,452 
    Retirement Shares                                       2            10            --            10            --            10 
  Reinvested dividends and distributions
    Institutional Shares                               50,565        14,337            --            --            40            21 
    Retirement Shares                                       1            --            --            --            --            -- 
  Shares repurchased
    Institutional Shares                            (139,241)      (53,051)     (318,015)     (136,967)      (27,336)       (2,760)
    Retirement Shares                                      --            --            --            --            --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase/(Decrease) from
  Capital Share Transactions                          287,145       205,427        70,717        67,361        51,225         6,723 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase/(Decrease) in Net Assets                 495,274       282,504       264,749       124,518        67,361         6,846 
Net Assets:
  Beginning of period                                 608,293       325,789       508,211       383,693         6,846            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
  End of period                                    $1,103,567    $  608,293    $  772,960    $  508,211    $   74,207    $    6,846 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets Consist of:
  Capital (par value and paid-in surplus)*         $  773,002    $  485,858    $  475,254    $  404,537    $   57,948    $    6,723 
  Undistributed net investment income/(loss)*             210           117           (6)            --            34             4 
  Undistributed net realized gain/(loss)
    from investments*                                   9,028        47,894        50,119       (9,994)       (3,947)         (146)
  Unrealized appreciation/(depreciation)
    of investments and foreign currency               321,327        74,424       247,593       113,668        20,172           265 
                                                   $1,103,567    $  608,293    $  772,960    $  508,211    $   74,207    $    6,846 
Transactions in Portfolio Shares
  - Institutional Shares
  Shares sold                                          18,605        14,157        17,430        11,104         4,982           765 
  Reinvested dividends and distributions                2,441           829            --            --             2             2 
- ------------------------------------------------------------------------------------------------------------------------------------
Total                                                  21,046        14,986        17,430        11,104         4,984           767 
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Repurchased                                    (7,082)       (3,068)      (14,193)       (7,417)       (1,805)         (226)
Net Increase/(Decrease) in Portfolio Shares            13,964        11,918         3,237         3,687         3,179           541 
Shares Outstanding Beginning of Period                 32,921        21,003        24,727        21,040           541            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Outstanding End of Period                       46,885        32,921        27,964        24,727         3,720           541 
- ------------------------------------------------------------------------------------------------------------------------------------
Transactions in Portfolio Shares
  - Retirement Shares(3)
  Shares sold                                              79           618            --           620            --         1,000 
  Reinvested dividends and distributions                   40            17            --            --            --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total                                                     119           635            --           620            --         1,000 
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Repurchased                                         --            --            --            --            --            -- 
Net Increase/(Decrease) in Portfolio Shares               119           635            --           620            --         1,000 
Shares Outstanding Beginning of Period                    635            --           620            --         1,000            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Outstanding End of Period                          754           635           620           620         1,000         1,000 
- ------------------------------------------------------------------------------------------------------------------------------------
Purchases and Sales of Investment Securities:
  (excluding short-term securities)
  Purchases of securities                          $  747,926    $  713,049    $  795,996    $  583,004    $   65,706    $    6,590 
  Proceeds from sales of securities                   531,213       506,228       747,773       509,947        20,828         1,165 
  Purchases of long-term
    U.S. government obligations                            --            --            --            --            --            -- 
  Proceeds from sales of long-term
    U.S. government obligations                            --            --            --            --            --            -- 

<CAPTION>
                                                          Janus Aspen                Janus Aspen                  Janus Aspen
                                                      International Growth         Worldwide Growth                 Balanced
For the fiscal year or period ended                        Portfolio                  Portfolio                    Portfolio
December 31 (all numbers in thousands)                1998          1997          1998          1997          1998          1997
- ------------------------------------------------------------------------------------------------------------------------------------
Operations:                                                                                                                         
<S>                                                <C>           <C>           <C>           <C>           <C>           <C>        
  Net investment income/(loss)                     $    1,703    $      669    $   14,085    $    7,744    $   13,428    $    5,061 
  Net realized gain/(loss)                                                                                                          
    from investment transactions                     (14,669)         (148)      (60,752)        46,834         (989)       13,320 
  Change in unrealized net appreciation                                                                                             
    or depreciation of investments                     43,585        10,109       569,104       135,768       174,276        15,763 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase in Net Assets                                                                                                          
  Resulting from Operations                            30,619        10,630       522,437       190,346       186,715        34,144 
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends and Distributions to Shareholders:                                                                                        
  Net investment income*                              (1,573)         (645)      (15,228)       (9,330)      (13,267)       (5,104)
  Dividends (in excess of net investment income)*          --            --            --       (1,332)            --            -- 
  Net realized gain from investment transactions*          --          (59)            --       (8,190)      (12,240)       (1,791)
  Distributions (in excess of realized gains)         (3,097)         (161)      (69,710)            --         (987)            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Decrease from Dividends and Distributions         (4,670)         (865)      (84,938)      (18,852)      (26,494)       (6,895)
- ------------------------------------------------------------------------------------------------------------------------------------
Capital Share Transactions:                                                                                                         
  Shares sold                                                                                                                       
    Institutional Shares                              265,075       185,562     1,208,930       897,983       390,880       254,907 
    Retirement Shares                                       4            10         5,082           402        15,037            10 
  Reinvested dividends and distributions                                                                                            
    Institutional Shares                                4,670           864        84,904        18,852        26,417         7,744 
    Retirement Shares                                      --            --            34            --            77            -- 
  Shares repurchased                                                                                                                
    Institutional Shares                            (145,673)      (62,291)     (417,023)      (94,383)      (54,219)      (12,969)
    Retirement Shares                                      --            --         (165)            --       (1,077)            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase/(Decrease) from                                                                                                        
  Capital Share Transactions                          124,076       124,145       881,762       822,854       377,115       249,692 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase/(Decrease) in Net Assets                 150,025       133,910     1,319,261       994,348       537,336       276,941 
Net Assets:                                                                                                                         
  Beginning of period                                 161,102        27,192     1,576,951       582,603       362,421        85,480 
- ------------------------------------------------------------------------------------------------------------------------------------
  End of period                                    $  311,127    $  161,102    $2,896,212    $1,576,951    $  899,757    $  362,421 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets Consist of:                                                                                                              
  Capital (par value and paid-in surplus)*         $  273,222    $  149,136    $2,209,339    $1,327,595    $  705,836    $  328,723 
  Undistributed net investment income/(loss)*             114            80           400         1,556           527           129 
  Undistributed net realized gain/(loss)                                                                                            
    from investments*                                (17,886)         (206)      (86,790)        43,642       (1,222)        13,228 
  Unrealized appreciation/(depreciation)                                                                                            
    of investments and foreign currency                55,677        12,092       773,263       204,158       194,616        20,341 
                                                   $  311,127    $  161,102    $2,896,212    $1,576,951    $  899,757    $  362,421 
Transactions in Portfolio Shares                                                                                                    
  - Institutional Shares                                                                                                            
  Shares sold                                          12,915        10,297        44,980        40,742        20,067        15,268 
  Reinvested dividends and distributions                  212            46         2,966           819         1,279           470 
- ------------------------------------------------------------------------------------------------------------------------------------
Total                                                  13,127        10,343        47,946        41,561        21,346        15,738 
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Repurchased                                    (7,220)       (3,357)      (15,979)       (4,123)       (2,871)         (776)
Net Increase/(Decrease) in Portfolio Shares             5,907         6,986        31,967        37,438        18,475        14,962 
Shares Outstanding Beginning of Period                  8,716         1,730        67,406        29,968        20,751         5,789 
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Outstanding End of Period                       14,623         8,716        99,373        67,406        39,226        20,751 
- ------------------------------------------------------------------------------------------------------------------------------------
Transactions in Portfolio Shares                                                                                                    
  - Retirement Shares(3)                                                                                                            
  Shares sold                                             201           595       188,749        17,245       815,403           650 
  Reinvested dividends and distributions                    8             4         1,188             6         3,415            19 
- ------------------------------------------------------------------------------------------------------------------------------------
Total                                                     209           599       189,937        17,251       818,818           669 
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Repurchased                                         --            --       (6,322)            --      (55,344)           -- 
Net Increase/(Decrease) in Portfolio Shares               209           599       183,615        17,251       763,474           669 
Shares Outstanding Beginning of Period                    599            --        17,251            --           669            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Outstanding End of Period                          808           599       200,866        17,251       764,143           669 
- ------------------------------------------------------------------------------------------------------------------------------------
Purchases and Sales of Investment Securities:                                                                                       
  (excluding short-term securities)                                                                                                 
  Purchases of securities                          $  295,506    $  193,061    $2,082,135    $1,715,083    $  608,627    $  377,245 
  Proceeds from sales of securities                   194,200        73,634     1,556,004       862,382       284,350       221,317 
  Purchases of long-term                                                                                                            
    U.S. government obligations                            --            --            --            --        76,402        70,831 
  Proceeds from sales of long-term                                                                                                  
    U.S. government obligations                            --            --            --            --        87,965        13,669 
                                                   
<CAPTION>
                                                          Janus Aspen         Janus Aspen           Janus Aspen       
                                                         Equity Income     Growth and Income      Flexible Income     
For the fiscal year or period ended                        Portfolio           Portfolio             Portfolio         
December 31 (all numbers in thousands)                1998         1997(1)       1998(2)        1998          1997     
- ------------------------------------------------------------------------------------------------------------------------------------
Operations:                                                                                                            
<S>                                                <C>           <C>           <C>           <C>           <C>         
  Net investment income/(loss)                     $       10    $        3    $       13    $    5,513    $    2,522  
  Net realized gain/(loss)                                                                                             
    from investment transactions                           65            71         (119)           964           683  
  Change in unrealized net appreciation                                                                                
    or depreciation of investments                      2,297            80          1005           680         1,050  
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase in Net Assets                                                                                             
  Resulting from Operations                             2,372           154           899         7,157         4,255  
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends and Distributions to Shareholders:                                                                           
  Net investment income*                                  (9)           (2)          (11)       (5,587)       (2,372) 
  Dividends (in excess of net investment income)*          --            --            --            --            --  
  Net realized gain from investment transactions*        (74)            --            --         (704)         (322) 
  Distributions (in excess of realized gains)              --            --            --            --            --  
- ------------------------------------------------------------------------------------------------------------------------------------
Net Decrease from Dividends and Distributions            (83)           (2)          (11)       (6,291)       (2,694) 
- ------------------------------------------------------------------------------------------------------------------------------------
Capital Share Transactions:                                                                                            
  Shares sold                                                                                                          
    Institutional Shares                                6,139         3,884         6,714        84,767        35,431  
    Retirement Shares                                      --            10            10            --            10  
  Reinvested dividends and distributions                                                                               
    Institutional Shares                                   83             2            11         6,290         2,693  
    Retirement Shares                                      --            --            --             1             1  
  Shares repurchased                                                                                                   
    Institutional Shares                              (2,534)         (988)       (1,198)      (16,439)      (10,902) 
    Retirement Shares                                      --            --            --            --            --  
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase/(Decrease) from                                                                                           
  Capital Share Transactions                            3,688         2,908         5,537        74,619        27,233  
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase/(Decrease) in Net Assets                   5,977         3,060         6,425        75,485        28,794  
Net Assets:                                                                                                            
  Beginning of period                                   3,060            --            --        54,109        25,315  
- ------------------------------------------------------------------------------------------------------------------------------------
  End of period                                    $    9,037    $    3,060    $    6,425    $  129,594    $   54,109  
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets Consist of:                                                                                                 
  Capital (par value and paid-in surplus)*         $    6,596    $    2,908    $    5,537    $  126,149    $   51,530  
  Undistributed net investment income/(loss)*               5             1             2           169           208  
  Undistributed net realized gain/(loss)                                                                               
    from investments*                                      59            71         (119)           897           672  
  Unrealized appreciation/(depreciation)                                                                               
    of investments and foreign currency                 2,377            80         1,005         2,379         1,699  
                                                   $    9,037    $    3,060    $    6,425    $  129,594    $   54,109  
Transactions in Portfolio Shares                                                                                       
  - Institutional Shares                                                                                               
  Shares sold                                             399           301           655         6,992         3,048  
  Reinvested dividends and distributions                    5            --             1           525           234  
- ------------------------------------------------------------------------------------------------------------------------------------
Total                                                     404           301           656         7,517         3,282  
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Repurchased                                      (165)          (75)         (120)       (1,360)         (941) 
Net Increase/(Decrease) in Portfolio Shares               239           226           536         6,157         2,341  
Shares Outstanding Beginning of Period                    226            --            --         4,593         2,252  
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Outstanding End of Period                          465           226           536        10,750         4,593  
- ------------------------------------------------------------------------------------------------------------------------------------
Transactions in Portfolio Shares                                                                                       
  - Retirement Shares(3)                                                                                               
  Shares sold                                              --         1,000         1,000            --           876  
  Reinvested dividends and distributions                   13            --            --            57            56  
- ------------------------------------------------------------------------------------------------------------------------------------
Total                                                      13         1,000         1,000            57           932  
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Repurchased                                         --            --            --            --            --  
Net Increase/(Decrease) in Portfolio Shares                13         1,000         1,000            57           932  
Shares Outstanding Beginning of Period                  1,000            --            --           932            --  
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Outstanding End of Period                        1,013         1,000         1,000           989           932  
- ------------------------------------------------------------------------------------------------------------------------------------
Purchases and Sales of Investment Securities:                                                                          
  (excluding short-term securities)                                                                                    
  Purchases of securities                          $    7,825    $    3,560    $    5,637    $  140,772    $   46,074  
  Proceeds from sales of securities                     4,252           997         1,126        93,382        31,006  
  Purchases of long-term                                                                                               
    U.S. government obligations                            --            --            --        37,749        15,463  
  Proceeds from sales of long-term                                                                                     
    U.S. government obligations                            --            --            --        19,499         7,755  
</TABLE>

(1)  Period May 1, 1997, (inception) to December 31, 1997.
(2)  Period May 1, 1998, (inception) to December 31, 1998.
(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.

48 and 49  Janus Aspen Series / December 31, 1998
<PAGE>

Statements of | Changes in Net Assets (continued)

<TABLE>
<CAPTION>
                                                           Janus Aspen                 Janus Aspen
                                                           High-Yield                  Money Market
For the fiscal year or period ended                         Portfolio                   Portfolio
December 31 (all numbers in thousands)                 1998          1997          1998          1997
- ------------------------------------------------------------------------------------------------------------------------------------
Operations:
<S>                                                 <C>           <C>           <C>           <C>      
  Net investment income/(loss)                      $     255     $     125     $   1,650     $     461
  Net realized gain/(loss) from
    investment transactions                              (51)            67            --            -- 
  Change in unrealized net appreciation
    or depreciation of investments                      (141)            39            --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase in Net Assets
  Resulting from Operations                                63           231         1,650           461
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends and Distributions to Shareholders:
  Net investment income*                                (257)         (117)       (1,650)         (461)
  Dividends (in excess of net investment income)*          --            --            --            -- 
  Net realized gain from investment transactions*        (15)           (6)            --            -- 
  Distributions (in excess of realized gains)            (51)            --            --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Decrease from Dividends and Distributions           (323)         (123)       (1,650)         (461)
- ------------------------------------------------------------------------------------------------------------------------------------
Capital Share Transactions:
  Shares sold
    Institutional Shares                                4,244         3,976       132,432        78,614
    Retirement Shares                                      --            10            --            10
  Reinvested dividends and distributions
    Institutional Shares                                  322           122         1,650           461
    Retirement Shares                                       1             1            --            -- 
  Shares repurchased
    Institutional Shares                              (4,244)       (2,075)     (110,765)      (69,807)
    Retirement Shares                                      --            --            --            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase/(Decrease) from
  Capital Share Transactions                              323         2,034        23,317         9,278
- ------------------------------------------------------------------------------------------------------------------------------------
Net Increase/(Decrease) in Net Assets                      63         2,142        23,317         9,278
Net Assets:
  Beginning of period                                   2,925           783        15,384         6,106
- ------------------------------------------------------------------------------------------------------------------------------------
  End of period                                     $   2,988     $   2,925     $  38,701     $  15,384
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets Consist of:
  Capital (par value and paid-in surplus)*          $   3,106     $   2,783     $  38,701     $  15,384
  Undistributed net investment income/(loss)*               8            12            --            -- 
  Undistributed net realized gain/(loss)
    from investments*                                    (50)            66            --            -- 
  Unrealized appreciation/(depreciation) of
    investments and foreign currency                     (76)            64            --            -- 
                                                    $   2,988     $   2,925     $  38,701     $  15,384
Transactions in Portfolio Shares
  - Institutional Shares
  Shares sold                                             356           343       132,432        78,614
  Reinvested dividends and distributions                   28            11         1,650           461
- ------------------------------------------------------------------------------------------------------------------------------------
Total                                                     384           354       134,082        79,075
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Repurchased                                      (357)         (179)     (110,766)      (69,807)
Net Increase/(Decrease) in Portfolio Shares                27           175        23,316         9,268
Shares Outstanding Beginning of Period                    247            72        15,374         6,106
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Outstanding End of Period                          274           247        38,690        15,374
- ------------------------------------------------------------------------------------------------------------------------------------
Transactions in Portfolio Shares
  - Retirement Shares(1)
  Shares sold                                              --           893            --        10,000
  Reinvested dividends and distributions                   89            57           496           306
- ------------------------------------------------------------------------------------------------------------------------------------
Total                                                      89           950           496        10,306
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Repurchased                                         --            --            --            -- 
Net Increase/(Decrease) in Portfolio Shares                89           950           496        10,306
Shares Outstanding Beginning of Period                    950            --        10,306            -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Outstanding End of Period                        1,039           950        10,802        10,306
- ------------------------------------------------------------------------------------------------------------------------------------
Purchases and Sales of Investment Securities:
  (excluding short-term securities)
  Purchases of securities                           $   8,323     $   6,515            --            -- 
  Proceeds from sales of securities                     9,612         4,066            --            -- 
  Purchases of long-term
    U.S. government obligations                           640            24            --            -- 
  Proceeds from sales of long-term
    U.S. government obligations                           536            25            --            -- 
</TABLE>

(1)  Transactions  in Portfolio  Shares - Retirement  Shares  numbers are not in
     thousands.

*See Note 3 in Notes to Financial Statements.

See Notes to Financial Statements.

50  Janus Aspen Series / December 31, 1998
<PAGE>

                                   Financial | Highlights - Institutional Shares

<TABLE>
<CAPTION>
For a share outstanding throughout,                                           Janus Aspen Growth Portfolio
each fiscal year or period ended December 31                1998           1997           1996           1995           1994
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    18.48     $    15.51     $    13.45     $    10.57     $    10.32
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .05            .15            .17            .28            .09
  Net gains/(losses) on securities
    (both realized and unrealized)                             6.36           3.34           2.29           2.90            .20
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               6.41           3.49           2.46           3.18            .29
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.05)          (.15)          (.17)          (.30)          (.04)
  Dividends (in excess of net investment income)                 --             --             --             --             --
  Distributions (from capital gains)                         (1.30)          (.37)          (.23)             --             --
  Distributions (in excess of realized gains)                    --             --             --             --             --
  Tax return of capital                                          --             --             --             --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                          (1.35)          (.52)          (.40)          (.30)          (.04)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    23.54     $    18.48     $    15.51     $    13.45     $    10.57
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                35.66%         22.75%         18.45%         30.17%          2.76%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $1,103,549     $  608,281     $  325,789     $  126,911     $   43,549
Average Net Assets for the Period (in thousands)         $  789,454     $  477,914     $  216,125     $   77,344     $   26,464
Ratio of Gross Expenses to Average Net Assets**(1)            0.68%          0.70%          0.69%          0.78%            N/A
Ratio of Net Expenses to Average Net Assets**(1)              0.68%          0.69%          0.69%          0.76%          0.88%
Ratio of Net Investment Income to Average Net Assets**        0.26%          0.91%          1.39%          1.24%          1.45%
Portfolio Turnover Rate**                                       73%           122%            87%           185%           169%

<CAPTION>
For a share outstanding throughout                                      Janus Aspen Aggressive Growth Portfolio
each fiscal year or period ended December 31                1998           1997           1996           1995           1994
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    20.55     $    18.24     $    17.08     $    13.62     $    11.80
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                   --             --             --            .24            .11
  Net gains/(losses) on securities
    (both realized and unrealized)                             7.09           2.31           1.36           3.47           1.82
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               7.09           2.31           1.36           3.71           1.93
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                         --             --             --          (.25)          (.11)
  Dividends (in excess of net investment income)                 --             --             --             --             --
  Distributions (from capital gains)                             --             --          (.19)             --             --
  Distributions (in excess of realized gains)                    --             --             --             --             --
  Tax return of capital                                          --             --          (.01)             --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                              --             --          (.20)          (.25)          (.11)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    27.64     $    20.55     $    18.24     $    17.08     $    13.62
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                34.26%         12.66%          7.95%         27.48%         16.33%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $  772,943     $  508,198     $  383,693     $  185,911     $   41,289
Average Net Assets for the Period (in thousands)         $  576,444     $  418,464     $  290,629     $  107,582     $   14,152
Ratio of Gross Expenses to Average Net Assets**(1)            0.75%          0.76%          0.76%          0.86%            N/A
Ratio of Net Expenses to Average Net Assets**(1)              0.75%          0.76%          0.76%          0.84%          1.05%
Ratio of Net Investment Income to Average Net Assets**      (0.36%)        (0.10%)        (0.27%)          0.58%          2.18%
Portfolio Turnover Rate**                                      132%           130%            88%           155%           259%
</TABLE>

*Total return not annualized for periods of less than one full year.
**Annualized for periods of less than one full year.
(1) See footnote #5 in Notes to Financial Statements.
N/A - Disclosure not required for prior periods.

See Notes to Financial Statements.

                                      Janus Aspen Series / December 31, 1998  51
<PAGE>
Financial | Highlights - Institutional Shares (continued)

<TABLE>
<CAPTION>
For a share outstanding throughout              Janus Aspen Capital Appreciation Portfolio
each fiscal year or period ended December 31                1998          1997(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>       
Net Asset Value, Beginning of Period                     $    12.62     $    10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .01            .05
  Net gains/(losses) on securities
    (both realized and unrealized)                             7.32           2.61
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               7.33           2.66
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.01)          (.04)
  Dividends (in excess of net investment income)                 --             --
  Distributions (from capital gains)                             --             --
  Distributions (in excess of realized gains)                    --             --
  Tax return of capital                                          --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.01)          (.04)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    19.94     $    12.62
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                58.11%         26.60%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $   74,187     $    6,833
Average Net Assets for the Period (in thousands)         $   25,964     $    2,632
Ratio of Gross Expenses to Average Net Assets**(3)            0.92%          1.26%
Ratio of Net Expenses to Average Net Assets**(3)              0.91%          1.25%
Ratio of Net Investment Income to Average Net Assets**        0.27%          1.43%
Portfolio Turnover Rate**                                       91%           101%

<CAPTION>
For a share outstanding throughout                                     Janus Aspen International Growth Portfolio
each fiscal year or period ended December 31                1998           1997           1996           1995         1994(2)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    18.48     $    15.72     $    11.95     $     9.72     $    10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .13            .11            .05            .09          (.09)
  Net gains/(losses) on securities
    (both realized and unrealized)                             3.07           2.80           4.06           2.16          (.19)
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               3.20           2.91           4.11           2.25          (.28)
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.14)          (.11)          (.11)          (.02)             --
  Dividends (in excess of net investment income)                 --             --             --             --             --
  Distributions (from capital gains)                             --          (.01)          (.23)             --             --
  Distributions (in excess of realized gains)                 (.27)          (.03)             --             --             --
  Tax return of capital                                          --             --             --             --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.41)          (.15)          (.34)          (.02)             --
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    21.27     $    18.48     $    15.72     $    11.95     $     9.72
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                17.23%         18.51%         34.71%         23.15%        (2.80%)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $  311,110     $  161,091     $   27,192     $    1,608     $    1,353
Average Net Assets for the Period (in thousands)         $  234,421     $   96,164     $    7,437     $    1,792     $    1,421
Ratio of Gross Expenses to Average Net Assets**(3)            0.86%          0.96%          1.26%          2.69%            N/A
Ratio of Net Expenses to Average Net Assets**(3)              0.86%          0.96%          1.25%          2.50%          2.50%
Ratio of Net Investment Income to Average Net Assets**        0.73%          0.70%          0.62%         (.80%)        (1.30%)
Portfolio Turnover Rate**                                       93%            86%            65%           211%           275%
</TABLE>

*Total return not annualized for periods of less than one full year.
**Annualized for periods of less than one full year. 
(1) Period May 1, 1997, (inception) to December 31, 1997 
(2) Period May 2, 1994 (inception) to December 31, 1994 
(3) See footnote #5 in Notes to Financial Statements. 
N/A - Disclosure not required for prior periods.

See Notes to Financial Statements.

52  Janus Aspen Series / December 31, 1998
<PAGE>

<TABLE>
<CAPTION>
For a share outstanding throughout                                      Janus Aspen Worldwide Growth  Portfolio
each fiscal year or period ended December 31                1998           1997           1996           1995           1994
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    23.39     $    19.44     $    15.31     $    12.07     $    11.89
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .16            .16            .16            .11            .04
  Net gains/(losses) on securities
    (both realized and unrealized)                             6.59           4.14           4.27           3.19            .14
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               6.75           4.30           4.43           3.30            .18
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.18)          (.17)          (.17)          (.06)             --
  Dividends (in excess of net investment income)                 --          (.02)             --             --             --
  Distributions (from capital gains)                             --          (.16)          (.13)             --             --
  Distributions (in excess of realized gains)                 (.87)             --             --             --             --
  Tax return of capital                                          --             --             --             --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                          (1.05)          (.35)          (.30)          (.06)             --
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    29.09     $    23.39     $    19.44     $    15.31     $    12.07
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                28.92%         22.15%         29.04%         27.37%          1.53%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $2,890,375     $1,576,548     $  582,603     $  108,563     $   37,728
Average Net Assets for the Period (in thousands)         $2,217,695     $1,148,951     $  304,111     $   59,440     $   22,896
Ratio of Gross Expenses to Average Net Assets**(1)            0.72%          0.74%          0.80%          0.90%            N/A
Ratio of Net Expenses to Average Net Assets**(1)              0.72%          0.74%          0.80%          0.87%          1.18%
Ratio of Net Investment Income to Average Net Assets**        0.64%          0.67%          0.83%          0.95%          0.50%
Portfolio Turnover Rate**                                       77%            80%            62%           113%           217%

<CAPTION>
For a share outstanding throughout                                           Janus Aspen Balanced Portfolio
each fiscal year or period ended December 31                1998           1997           1996           1995           1994
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    17.47     $    14.77     $    13.03     $    10.63     $    10.64
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .39            .34            .32            .17            .15
  Net gains/(losses) on securities
    (both realized and unrealized)                             5.51           2.89           1.81           2.45          (.06)
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               5.90           3.23           2.13           2.62            .09
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.38)          (.35)          (.30)          (.22)          (.10)
  Dividends (in excess of net investment income)                 --             --             --             --             --
  Distributions (from capital gains)                          (.45)          (.18)          (.09)             --             --
  Distributions (in excess of realized gains)                 (.04)             --             --             --             --
  Tax return of capital                                          --             --             --             --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.87)         (0.53)          (.39)          (.22)          (.10)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    22.50     $    17.47     $    14.77     $    13.03     $    10.63
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                34.28%         22.10%         16.18%         24.79%          0.84%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $  882,495     $  362,409     $   85,480     $   14,021     $    3,153
Average Net Assets for the Period (in thousands)         $  555,002     $  176,432     $   43,414     $    5,739     $    2,336
Ratio of Gross Expenses to Average Net Assets**(1)            0.74%          0.83%          0.94%          1.37%            N/A
Ratio of Net Expenses to Average Net Assets**(1)              0.74%          0.82%          0.92%          1.30%          1.57%
Ratio of Net Investment Income to Average Net Assets**        2.41%          2.87%          2.92%          2.41%          1.90%
Portfolio Turnover Rate**                                       70%           139%           103%           149%           158%
</TABLE>

*Total return not annualized for periods of less than one full year.
**Annualized for periods of less than one full year.
(1) See footnote #5 in Notes to Financial Statements.
N/A - Disclosure not required for prior periods.

                                      Janus Aspen Series / December 31, 1998  53
<PAGE>

Financial | Highlights - Institutional Shares (continued)

<TABLE>
<CAPTION>
For a share outstanding throughout                  Janus Aspen Equity Income Portfolio
each fiscal year or period ended December 31                1998          1997(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>       
Net Asset Value, Beginning of Period                     $    13.46     $    10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .02            .01
  Net gains/(losses) on securities
    (both realized and unrealized)                             6.16           3.46
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               6.18           3.47
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.02)          (.01)
  Dividends (in excess of net investment income)                 --             --
  Distributions (from capital gains)                          (.21)             --
  Distributions (in excess of realized gains)                    --             --
  Tax return of capital                                          --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.23)          (.01)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    19.41     $    13.46
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                46.24%         34.70%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $    9,017     $    3,047
Average Net Assets for the Period (in thousands)         $    5,629     $    1,101
Ratio of Gross Expenses to Average Net Assets**(2)            1.25%          1.25%
Ratio of Net Expenses to Average Net Assets**(2)              1.25%          1.25%
Ratio of Net Investment Income to Average Net Assets**        0.17%          0.35%
Portfolio Turnover Rate**                                       79%           128%

<CAPTION>
                                                        Janus Aspen
For a share outstanding throughout               Growth and Income Portfolio
each fiscal year or period ended December 31               1998(3)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>       
Net Asset Value, Beginning of Period                     $    10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .02
  Net gains/(losses) on securities
    (both realized and unrealized)                             1.96
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               1.98
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.02)
  Dividends (in excess of net investment income)                 --
  Distributions (from capital gains)                             --
  Distributions (in excess of realized gains)                    --
  Tax return of capital                                          --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.02)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    11.96
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                19.80%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $    6,413
Average Net Assets for the Period (in thousands)         $    2,883
Ratio of Gross Expenses to Average Net Assets**(2)            1.25%
Ratio of Net Expenses to Average Net Assets**(2)              1.25%
Ratio of Net Investment Income to Average Net Assets**        0.66%
Portfolio Turnover Rate**                                       62%
</TABLE>

*Total return not annualized for periods of less than one full year.
**Annualized for periods of less than one full year.
(1) Period May 1, 1997, (inception) to December 31, 1997.
(2) See footnote #5 in Notes to Financial Statements.
(3) Period May 1, 1998, (inception) to December 31, 1998.

See Notes to Financial Statements.

54  Janus Aspen Series / December 31, 1998
<PAGE>

<TABLE>
<CAPTION>
For a share outstanding throughout                                        Janus Aspen Flexible Income Portfolio
each fiscal year or period ended December 31                 1998           1997           1996           1995           1994
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    11.78     $    11.24     $    11.11     $     9.48     $     9.97
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .64            .67            .74            .53            .47
  Net gains/(losses) on securities
    (both realized and unrealized)                              .41            .62            .24           1.70          (.56)
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               1.05           1.29            .98           2.23          (.09)
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.67)          (.64)          (.72)          (.60)          (.40)
  Dividends (in excess of net investment income)                 --             --             --             --             --
  Distributions (from capital gains)                          (.11)          (.11)          (.13)             --             --
  Distributions (in excess of realized gains)                    --             --             --             --             --
  Tax return of capital                                          --             --             --             --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.78)          (.75)          (.85)          (.60)          (.40)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    12.05     $    11.78     $    11.24     $    11.11     $     9.48
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                 9.11%         11.76%          9.19%         23.86%        (0.91%)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $  129,582     $   54,098     $   25,315     $   10,831     $    1,924
Average Net Assets for the Period (in thousands)         $   86,627     $   36,547     $   17,889     $    5,556     $    1,636
Ratio of Gross Expenses to Average Net Assets**(1)            0.73%          0.75%          0.84%          1.07%            N/A
Ratio of Net Expenses to Average Net Assets**(1)              0.73%          0.75%          0.83%          1.00%          1.00%
Ratio of Net Investment Income to Average Net Assets**        6.36%          6.90%          7.31%          7.46%          5.49%
Portfolio Turnover Rate**                                      145%           119%           250%           236%           234%

<CAPTION>
For a share outstanding throughout                              Janus Aspen High-Yield Portfolio
each fiscal year or period ended December 31                   1998           1997           1996(2)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    11.78     $    10.83     $    10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .87            .70            .43
  Net gains/(losses) on securities
    (both realized and unrealized)                            (.70)            .99            .80
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                                .17           1.69           1.23
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.89)          (.68)          (.40)
  Dividends (in excess of net investment income)                 --             --             --
  Distributions (from capital gains)                          (.05)          (.06)             --
  Distributions (in excess of realized gains)                 (.16)             --             --
  Tax return of capital                                          --             --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                          (1.10)          (.74)          (.40)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    10.85     $    11.78     $    10.83
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                 1.26%         15.98%         12.40%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $    2,977     $    2,914     $      783
Average Net Assets for the Period (in thousands)         $    3,281     $    1,565     $      459
Ratio of Gross Expenses to Average Net Assets**(1)            1.00%          1.00%          1.01%
Ratio of Net Expenses to Average Net Assets**(1)              1.00%          1.00%          1.00%
Ratio of Net Investment Income to Average Net Assets**        7.76%          7.98%          5.74%
Portfolio Turnover Rate**                                      301%           299%           301%
</TABLE>

*Total return not annualized for periods of less than one full year.
**Annualized for periods of less than one full year.
(1) See footnote #5 in Notes to Financial Statements.
(2) Period May 1, 1996, (inception) to December 31, 1996.
N/A - Disclosure not required for prior periods.

                                      Janus Aspen Series / December 31, 1998  55
<PAGE>

Financial | Highlights - Institutional Shares (continued)

<TABLE>
<CAPTION>
For a share outstanding throughout                                 Janus Aspen Money Market Portfolio
each fiscal year or period ended December 31                1998           1997           1996           1995(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $     1.00     $     1.00     $     1.00     $     1.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .05            .05            .05            .04
  Net gains/(losses) on securities
    (both realized and unrealized)                               --             --             --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                                .05            .05            .05            .04
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.05)          (.05)          (.05)          (.04)
  Dividends (in excess of net investment income)                 --             --             --             --
  Distributions (from capital gains)                             --             --             --             --
  Distributions (in excess of realized gains)                    --             --             --             --
  Tax return of capital                                          --             --             --             --
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.05)          (.05)          (.05)          (.04)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $     1.00     $     1.00     $     1.00     $     1.00
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                 5.36%          5.17%          5.05%          3.63%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $   38,690     $   15,374     $    6,106     $    1,735
Average Net Assets for the Period (in thousands)         $   31,665     $    8,926     $    3,715     $    1,543
Ratio of Gross Expenses to Average Net Assets**(2)            0.34%          0.50%          0.50%          0.50%
Ratio of Net Expenses to Average Net Assets**(2)              0.34%          0.50%          0.50%          0.50%
Ratio of Net Investment Income to Average Net Assets**        5.21%          5.17%          4.93%          5.30%
</TABLE>

*Total return not annualized for periods of less than one full year.
**Annualized for periods of less than one full year.
(1) Period May 1, 1995, (inception) to December 31, 1995.
(2) See footnote #5 in Notes to Financial Statements.
N/A - Disclosure not required for prior periods.

See Notes to Financial Statements.

56  Janus Aspen Series / December 31, 1998
<PAGE>

                                      Financial | Highlights - Retirement Shares

<TABLE>
<CAPTION>
                                                                                              Janus Aspen      
For a share outstanding throughout                     Janus Aspen Growth Portfolio   Aggressive Growth Portfolio
each fiscal year or period ended December 31                1998           1997(1)        1998           1997(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    18.46     $    16.18     $    20.49     $    16.12
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                (.03)            .04          (.12)          (.06)
  Net gains/(losses) on securities
    (both realized and unrealized)                             6.32           2.71           7.05           4.43
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               6.29           2.75           6.93           4.37
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                         --          (.10)             --             -- 
  Distributions (from capital gains)                         (1.30)          (.37)             --             -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                          (1.30)          (.47)             --             -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    23.45     $    18.46     $    27.42     $    20.49
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                34.99%         17.22%         33.58%         27.11%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $       18     $       12     $       17     $       13
Average Net Assets for the Period (in thousands)         $       13     $       11     $       14     $       11
Ratio of Gross Expenses to Average Net Assets**(2)            1.18%          1.20%          1.26%          1.32%
Ratio of Net Expenses to Average Net Assets**(2)              1.18%          1.20%          1.26%          1.32%
Ratio of Net Investment Income to Average Net Assets**      (0.23%)          0.29%        (0.86%)        (0.62%)
Portfolio Turnover Rate**                                       73%           122%           132%           130%

<CAPTION>
                                                            Janus Aspen Capital        Janus Aspen International 
For a share outstanding throughout                         Appreciation Portfolio           Growth Portfolio          
each fiscal year or period ended December 31                1998           1997(1)        1998           1997(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    12.62     $    10.00     $    18.44     $    16.80
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                (.04)            .12            .05            .04
  Net gains/(losses) on securities
    (both realized and unrealized)                             7.28           2.50           3.07           1.73
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               7.24           2.62           3.12           1.77
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                         --             --          (.01)          (.09)
  Distributions (from capital gains)                             --             --          (.28)          (.04)
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                              --             --          (.29)          (.13)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    19.86     $    12.62     $    21.27     $    18.44
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                57.37%         26.20%         16.86%         10.53%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $       20     $       13     $       17     $       11
Average Net Assets for the Period (in thousands)         $       15     $       12     $       13     $       11
Ratio of Gross Expenses to Average Net Assets**(2)            1.44%          1.73%          1.35%          1.45%
Ratio of Net Expenses to Average Net Assets**(2)              1.44%          1.73%          1.35%          1.45%
Ratio of Net Investment Income to Average Net Assets**      (0.25%)          1.55%          0.26%          0.26%
Portfolio Turnover Rate**                                       91%           101%            93%            86%
</TABLE>

*Total return not annualized for periods of less than one full year.
**Annualized for periods of less than one full year.
(1) Period May 1, 1997, (inception) to December 31, 1997.
(2) See footnote #5 in Notes to Financial Statements.

See Notes to Financial Statements.

                                      Janus Aspen Series / December 31, 1998  57
<PAGE>

Financial | Highlights - Retirement Shares (continued)
<TABLE>
<CAPTION>
                                                           Janus Aspen Worldwide              Janus Aspen           
For a share outstanding throughout                            Growth Portfolio             Balanced Portfolio    
each fiscal year or period ended December 31                1998           1997(1)        1998           1997(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    23.36     $    20.72     $    17.47     $    15.38
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .02            .14            .21            .27
  Net gains/(losses) on securities
    (both realized and unrealized)                             6.57           2.80           5.58           2.30
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               6.59           2.94           5.79           2.57
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.02)          (.14)          (.18)          (.30)
  Distributions (from capital gains)                          (.87)          (.16)          (.49)          (.18)
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.89)          (.30)          (.67)          (.48)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    29.06     $    23.36     $    22.59     $    17.47
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                28.25%         14.22%         33.59%         16.92%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $    5,837     $      403     $   17,262     $       12
Average Net Assets for the Period (in thousands)         $    1,742     $       11     $    3,650     $       11
Ratio of Gross Expenses to Average Net Assets**(2)            1.22%          1.26%          1.24%          1.32%
Ratio of Net Expenses to Average Net Assets**(2)              1.22%          1.26%          1.24%          1.32%
Ratio of Net Investment Income to Average Net Assets**      (0.02%)          0.16%          2.04%          2.38%
Portfolio Turnover Rate**                                       77%            80%            70%           139%

<CAPTION>
                                                                                      Janus Aspen
                                                         Janus Aspen Equity Income  Growth and Income 
For a share outstanding throughout                               Portfolio              Portfolio       
each fiscal year or period ended December 31                1998           1997(1)        1998(3)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    13.42     $    10.00     $    10.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                (.05)            .01            .01
  Net gains/(losses) on securities
    (both realized and unrealized)                             6.12           3.41           1.93
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               6.07           3.42           1.94
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                         --             --             -- 
  Distributions (from capital gains)                          (.21)             --             -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.21)             --             -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    19.28     $    13.42     $    11.94
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                45.55%         34.20%         19.40%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $       20     $       13     $       12
Average Net Assets for the Period (in thousands)         $       16     $       12     $       10
Ratio of Gross Expenses to Average Net Assets**(2)            1.75%          1.74%          1.72%
Ratio of Net Expenses to Average Net Assets**(2)              1.75%          1.74%          1.72%
Ratio of Net Investment Income to Average Net Assets**      (0.33)%          0.07%          0.21%
Portfolio Turnover Rate**                                       79%           128%            62%
</TABLE>

*Total return not annualized for periods of less than one full year.
**Annualized for periods of less than one full year.
(1) Period May 1, 1997, (inception) to December 31, 1997.
(2) See footnote #5 in Notes to Financial Statements.
(3) Period May 1, 1998, (inception) to December 31, 1998

See Notes to Financial Statements

58  Janus Aspen Series / December 31, 1998
<PAGE>

<TABLE>
<CAPTION>
                                                        Janus Aspen Flexible Income           Janus Aspen          
For a share outstanding throughout                               Portfolio                High-Yield Portfolio 
each fiscal year or period ended December 31                1998           1997(1)        1998           1997(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>            <C>            <C>       
Net Asset Value, Beginning of Period                     $    11.77     $    11.41     $    11.78     $    11.19
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .73            .50            .87            .59
  Net gains/(losses) on securities
    (both realized and unrealized)                              .27            .58          (.77)            .71
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                               1.00           1.08            .10           1.30
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.61)          (.61)          (.83)          (.65)
  Distributions (from capital gains)                          (.11)          (.11)          (.21)          (.06)
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.72)          (.72)         (1.04)          (.71)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $    12.05     $    11.77     $    10.84     $    11.78
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                 8.58%          9.73%          0.67%         11.96%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $       12     $       11     $       11     $       11
Average Net Assets for the Period (in thousands)         $       11     $       10     $       12     $       11
Ratio of Gross Expenses to Average Net Assets**(2)            1.24%          1.23%          1.50%          1.50%
Ratio of Net Expenses to Average Net Assets**(2)              1.23%          1.23%          1.50%          1.50%
Ratio of Net Investment Income to Average Net Assets**        5.92%          6.39%          7.33%          7.42%
Portfolio Turnover Rate**                                      145%           119%           301%           299%

<CAPTION>
                                                             Janus Aspen Money    
For a share outstanding throughout                            Market Portfolio     
each fiscal year or period ended December 31                1998           1997(1)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>            <C>       
Net Asset Value, Beginning of Period                     $     1.00     $     1.00
- ------------------------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
  Net investment income/(loss)                                  .05            .03
  Net gains/(losses) on securities
    (both realized and unrealized)                               --             -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                                .05            .03
- ------------------------------------------------------------------------------------------------------------------------------------
Less Distributions:
  Dividends (from net investment income)                      (.05)          (.03)
  Distributions (from capital gains)                             --             -- 
- ------------------------------------------------------------------------------------------------------------------------------------
Total Distributions                                           (.05)          (.03)
- ------------------------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                           $     1.00     $     1.00
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return*                                                 4.85%          3.13%
- ------------------------------------------------------------------------------------------------------------------------------------
Net Assets, End of Period (in thousands)                 $       11     $       10
Average Net Assets for the Period (in thousands)         $       10     $       10
Ratio of Gross Expenses to Average Net Assets**(2)            0.84%          1.00%
Ratio of Net Expenses to Average Net Assets**(2)              0.84%          1.00%
Ratio of Net Investment Income to Average Net Assets**        4.74%          4.66%
</TABLE>

*Total return not annualized for periods of less than one full year.
**Annualized for periods of less than one full year.
(1) Period May 1, 1997, (inception) to December 31, 1997.
(2) See footnote #5 in Notes to Financial Statements.
N/A - Disclosure not required for prior periods.

                                      Janus Aspen Series / December 31, 1998  59
<PAGE>

Notes to | Schedules of Investments

ADR - American Depository Receipt

CAD - Canadian Dollar

DEM - German Deutschemark

GDR - Global Depository Receipt

 * Non-income-producing security

** A portion of this  security  has been  segregated  by the  custodian to cover
   margin or segregation  requirements on open futures  contracts and/or forward
   currency contracts.

+  Securities  are  registered  pursuant  to Rule  144A and may be  deemed to be
   restricted for resale.

1) Variable Rate Notes.  The interest  rate,  which is based on specific,  or an
   index of, market interest rates, is subject to change.  Rates in the security
   description are as of December 31, 1998.

2) Money market funds may hold securities with stated maturities of greater than
   397 days when those  securities have features that allow a fund to "put" back
   the  security  to  the  issuer  or  to a  third  party  within  397  days  of
   acquisition.  The maturity dates shown in the security  descriptions  are the
   stated maturity dates.

3) Repurchase Agreements held by a 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. In the
   event of default on the obligation to repurchase, the Portfolio has the right
   to liquidate the  collateral  and apply the proceeds in  satisfaction  of the
   obligation.  In the event of default or  bankruptcy by the other party to the
   agreement,  realization and/or retention of the collateral or proceeds may be
   subject to legal proceedings.

60  Janus Aspen Series / December 31, 1998
<PAGE>

                                                 Notes to | Financial Statements

The following  section  describes the  organization  and significant  accounting
policies of the  Portfolios  and provides  more detailed  information  about the
schedules and tables that appear throughout this report. In addition,  the Notes
explain  how the  Portfolios  operate  and the  methods  used in  preparing  and
presenting this report.

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
   11 Portfolios or series of shares with  differing  investment  objectives and
   policies. Eight 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 Balanced Portfolio, Janus
   Aspen Equity Income  Portfolio,  and Janus Aspen Growth and Income Portfolio.
   Two Portfolios invest primarily in income-producing  securities:  Janus Aspen
   Flexible Income Portfolio and Janus Aspen High-Yield  Portfolio.  Janus Aspen
   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
   nondiversified.

   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.  Effective May 1, 1997, the Trust
   issued a new class of shares, the Retirement Shares. Retirement Shares of the
   Trust are issued and  redeemed  only in  connection  with  certain  qualified
   retirement  plans.  Janus Capital invested $10,000 of initial seed capital in
   the Retirement Shares of each Portfolio.

   Effective May 1, 1998,  the Trust issued one new series of shares,  the Janus
   Aspen Growth and Income Portfolio.  Janus Capital invested $10,000 of initial
   seed capital in each class of the 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 covered by other
   securities, in possession at the Portfolio's custodian,  which are denoted in
   the  accompanying  Schedule  of  Investments.   The  market  value  of  these
   securities  is  evaluated  daily to ensure that it is equal to or exceeds the
   current market value of the corresponding forward currency contract.

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

                                      Janus Aspen Series / December 31, 1998  61
<PAGE>

Notes to | Financial Statements (continued)

   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 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 indexes 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 because of 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 eight 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,  Janus Aspen Equity Income
   Portfolio,  and Janus Aspen  Growth and 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,
   Janus Equity Income Fund and Janus Growth and Income Fund, respectively.  The
   effective rate for each Portfolio for the period ended December 31, 1998, was
   .65%,  .71%,  .68%,  .66%,  .65%,  .69%,  .74%, and .66%,  respectively.  The
   Flexible  Income  Portfolio  is 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.  For additional  information on the specific fees
   for  the  Retirement  Shares,  please  refer  to  note  4  of  the  financial
   statements.

62  Janus Aspen Series / December 31, 1998
<PAGE>

   Janus  Capital  has agreed to reduce its fee to the extent  normal  operating
   expenses  exceed 1% of the  average  net  assets of the  Flexible  Income and
   High-Yield  Portfolios and .50% of the average net assets of the Money Market
   Portfolio for a fiscal year.

   Janus  Capital may  terminate  any of these fee waivers or  reductions  on at
   least 90 days' notice to the Trustees. The participant administration fee and
   distribution  fee  applicable  to the  Retirement  Shares are not included in
   these expense limits.

   Until at least May 1, 1999,  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 Equity Income and Growth and Income Portfolios. The participant
   administration  fee and distribution fee applicable to the Retirement  Shares
   are not included in this expense limit.

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

   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 December
   31, 1998, are noted below:

<TABLE>
<CAPTION>
                                              DST Securities, Inc.  Portfolio Expense      DST Systems
Portfolio                                      Commissions Paid*       Reduction*             Costs
- ------------------------------------------------------------------------------------------------------
<S>                                                  <C>                 <C>                 <C>    
Janus Aspen Growth Portfolio                         $6,937              $5,203              $11,354
Janus Aspen Aggressive Growth Portfolio               9,626               7,219               10,858
Janus Aspen Capital Appreciation Portfolio               --                  --               10,647
Janus Aspen International Growth Portfolio               --                  --               13,976
Janus Aspen Worldwide Growth Portfolio                   --                  --               20,260
Janus Aspen Balanced Portfolio                           --                  --               17,181
Janus Aspen Equity Income Portfolio                       7                   6                9,671
Janus Aspen Growth and Income Portfolio                  --                  --                5,305
Janus Aspen Flexible Income Portfolio                    --                  --               12,101
Janus Aspen High-Yield Portfolio                         --                  --               11,049
Janus Aspen Money Market Portfolio                       --                  --               11,323
- ------------------------------------------------------------------------------------------------------ 
</TABLE>
*The difference  between  commissions paid to DST Securities,  Inc. and expenses
reduced constituted commissions paid to an unaffiliated clearing broker.

                                      Janus Aspen Series / December 31, 1998  63
<PAGE>

Notes to | Financial Statements (continued)

3. FEDERAL INCOME TAX

   Net  investment  income  distributions  and capital gains  distributions  are
   determined in  accordance  with income tax  regulations  that may differ from
   generally  accepted  accounting  principles.  These  differences  are  due to
   differing  treatments  for items  such as  deferral  of wash  sales,  foreign
   currency  transactions,  net operating losses and capital loss carryforwards.
   Permanent  items  identified in the period ended December 31, 1998, have been
   reclassified among the components of net assets as follows:

<TABLE>
<CAPTION>
                                               Undistributed    Undistributed
                                               Net Investment    Net Realized        Paid-In
Portfolio                                          Income      Gains and Losses      Capital
- ---------------------------------------------------------------------------------------------
<S>                                             <C>               <C>               <C>      
Janus Aspen Growth Portfolio                    $       723       ($     188)       ($  535)
Janus Aspen Aggressive Growth Portfolio           2,052,294       (2,052,294)             --
Janus Aspen Capital Appreciation Portfolio               --                --             --
Janus Aspen International Growth Portfolio         (97,537)            87,314         10,223
Janus Aspen Worldwide Growth Portfolio             (13,914)            30,816       (16,902)
Janus Aspen Balanced Portfolio                      237,457         (234,881)        (2,576)
Janus Aspen Equity Income Portfolio                   2,963           (2,963)             --
Janus Aspen Growth and Income Portfolio                   5               (5)             --
Janus Aspen Flexible Income Portfolio                35,484          (35,453)           (31)
Janus Aspen High-Yield Portfolio                      (811)               811             --
Janus Aspen Money Market Portfolio                       --                --             --
- ---------------------------------------------------------------------------------------------
</TABLE>

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. As of December
31, 1998,  the net capital loss  carryovers  noted below are available to offset
future   realized   capital  gains  and  thereby  reduce  future  taxable  gains
distributions.  These carryovers  expire between December 31, 2005, and December
31, 2006. In 1998, the Portfolios  noted below  incurred  "post-October"  losses
during the period from November 1 through  December 31, 1998.  These losses will
be deferred for tax purposes and recognized in 1999.

The aggregate cost of investments and the composition of unrealized appreciation
and  depreciation  of investments for federal income tax purposes as of December
31, 1998, are also noted below.

<TABLE>
<CAPTION>
                                       Net Capital Loss   Post-October   Federal Tax    Unrealized    Unrealized   Net Appreciation/
Portfolio                                 Carryovers         Losses           Cost     Appreciation (Depreciation)  (Depreciation)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                      <C>            <C>            <C>             <C>           <C>            <C>
Janus Aspen Growth Portfolio                       --             --   $  780,498,251  $330,622,745  ($9,299,692)   $ 321,323,053
Janus Aspen Aggressive Growth Portfolio            --   ($    6,411)      516,465,352   248,870,051   (3,207,066)     245,662,985
Janus Aspen Capital 
  Appreciation Portfolio                ($ 3,876,042)       (71,212)       52,452,959    20,215,922      (43,399)      20,172,523
Janus Aspen International 
  Growth Portfolio                       (16,186,634)    (1,812,383)      257,366,821    61,858,909   (6,020,359)      55,838,550
Janus Aspen Worldwide Growth Portfolio   (71,839,828)   (12,508,850)    2,134,486,640   802,344,152  (31,673,554)     770,670,598
Janus Aspen Balanced Portfolio            (1,222,295)             --      698,505,667   200,644,127   (6,028,647)     194,615,480
Janus Aspen Equity Income Portfolio                --          (419)        6,503,109     2,453,086      (75,850)       2,377,236
Janus Aspen Growth and Income Portfolio      (94,424)             --        5,615,638     1,043,873      (63,953)         979,920
Janus Aspen Flexible Income Portfolio              --       (55,806)      124,036,913     3,696,489   (1,336,500)       2,359,989
Janus Aspen High-Yield Portfolio             (13,866)       (36,298)        3,040,840        23,053      (99,785)        (76,732)
Janus Aspen Money Market Portfolio                 --             --       39,356,790            --            --              --
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

Janus Aspen  International  Growth and Janus Aspen Worldwide Growth have elected
to pass through to shareholders  foreign taxes under Section 853.  Foreign taxes
paid and foreign  source  income for the  Portfolios  making the election are as
folllows:

                                            Foreign        Foreign
Portfolio                                 Taxes Paid    Source Income
- --------------------------------------------------------------------------------
Janus Aspen
 International Growth Portfolio           $  307,479     $ 1,259,751
Janus Aspen
 Worldwide Growth Portfolio               $2,534,346     $10,477,564
- --------------------------------------------------------------------------------

64  Janus Aspen Series / December 31, 1998
<PAGE>

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 a distribution fee of up to
   .25% of average net assets and a participant administration fee of up to .25%
   of average net assets.


5. EXPENSE RATIOS

   Listed below are the gross  expense  ratios for the various  Portfolios  that
   would be in  effect,  absent  the waiver of  certain  fees  and/or  voluntary
   reduction of the  adviser's fee to the  effective  rate of the  corresponding
   Janus retail fund.  Expense  ratios are  annualized for all periods less than
   one year.

<TABLE>
<CAPTION>
                                                           Institutional Shares                    Retirement Shares
Portfolio                                    1998       1997       1996       1995       1994       1998      1997(2)
- ---------------------------------------------------------------------------------------------------------------------
<S>                                          <C>        <C>        <C>        <C>        <C>        <C>        <C>  
Janus Aspen Growth Portfolio                 0.75%      0.78%      0.83%      0.98%      1.23%      1.28%      1.28%
Janus Aspen Aggressive Growth Portfolio      0.75%      0.78%      0.83%      0.93%      1.14%      1.29%      1.34%
Janus Aspen Capital Appreciation Portfolio   0.97%      2.19%(2)     N/A        N/A        N/A      1.49%      2.66%
Janus Aspen International Growth Portfolio   0.95%      1.08%      2.21%      3.57%      4.67%(5)   1.44%      1.57%
Janus Aspen Worldwide Growth Portfolio       0.74%      0.81%      0.91%      1.09%      1.49%      1.32%      1.32%
Janus Aspen Balanced Portfolio               0.74%      0.83%      1.07%      1.55%      1.74%      1.29%      1.33%
Janus Aspen Equity Income Portfolio          1.86%      5.75%(2)     N/A        N/A        N/A      2.36%      6.19%
Janus Aspen Growth and Income Portfolio      3.06%(1)     N/A        N/A        N/A        N/A      3.53%(1)     N/A
Janus Aspen Flexible Income Portfolio        0.73%      0.75%      0.84%      1.07%      1.35%      1.24%      1.23%
Janus Aspen High-Yield Portfolio             2.11%      3.27%      6.29%(3)     N/A        N/A      2.61%      3.42%
Janus Aspen Money Market Portfolio           0.34%      0.55%      0.78%      1.07%(4)     N/A      0.84%      1.10%
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>
(1) Period May 1, 1998, (inception) to December 31, 1998.
(2) Period May 1, 1997, (inception) to December 31, 1997.
(3) Period May 1, 1996, (inception) to December 31, 1996.
(4) Period May 1, 1995, (inception) to December 31, 1995.
(5) Period May 2, 1994, (inception) to December 31, 1994.

                                      Janus Aspen Series / December 31, 1998  65
<PAGE>

Explanations of | Charts, Tables and Financial Statements

1. PERFORMANCE OVERVIEWS

   Performance  overview graphs on the previous pages compare the performance of
   a  $10,000  investment  in  Institutional  Shares  of  each  Portfolio  (from
   inception)  to one or more widely used market  indexes  through  December 31,
   1998.

   When comparing the  performance  of a Portfolio  with an index,  keep in mind
   that  market  indexes  do not  include  brokerage  commissions  that would be
   incurred if you purchased the individual  securities in the index.  They also
   do not include taxes payable on dividends and interest or operating  expenses
   incurred if you maintained a Portfolio invested in the index.

   Average  annual  total  returns are also quoted for each class of  Portfolio.
   Average  annual total return is calculated by taking the growth or decline in
   value of an  investment  over a period  of time,  including  reinvestment  of
   dividends  and   distributions,   then  calculating  the  annual   compounded
   percentage  rate that would  have  produced  the same  result had the rate of
   growth been constant throughout the period.

2. SCHEDULES OF INVESTMENTS

   Following the performance  overview section is each  Portfolio's  Schedule of
   Investments.  This schedule reports the industry  concentrations and types of
   securities  held in each  Portfolio on the last day of the reporting  period.
   Securities are usually listed by type (common stock,  corporate  bonds,  U.S.
   government  obligations,  etc.)  and  by  industry  classification  (banking,
   communications, insurance, etc.).

   The  market  value  of each  security  is  quoted  as of the  last day of the
   reporting period.  The value of securities  denominated in foreign currencies
   is converted into U.S. dollars.

   Portfolios  that  invest in  foreign  securities  also  provide a summary  of
   investments  by country.  This summary  reports the  Portfolio's  exposure to
   different  countries by providing the  percentage  of securities  invested in
   each country.

2A. FORWARD CURRENCY CONTRACTS

   A table listing forward currency contracts follows each Portfolio's  Schedule
   of Investments (if applicable).  Forward currency contracts are agreements to
   deliver or receive a preset  amount of  currency  at a future  date.  Forward
   currency  contracts  are used to hedge against  foreign  currency risk in the
   Portfolio's long-term holdings.

   The table provides the name of the foreign  currency,  the settlement date of
   the contract,  the amount of the contract,  the value of the currency in U.S.
   dollars and the amount of unrealized  gain or loss.  The amount of unrealized
   gain or loss reflects the change in currency exchange rates from the time the
   contract was opened to the last day of the reporting period.

3. STATEMENT OF OPERATIONS

   This statement details the Portfolios' income,  expenses, gains and losses on
   securities and currency  transactions,  and  appreciation  or depreciation of
   current Portfolio holdings.

   The first section in this statement,  titled "Investment Income," reports the
   dividends  earned  from  stocks and  interest  earned  from  interest-bearing
   securities in the Portfolio.

   The next section  reports the expenses  and expense  offsets  incurred by the
   Portfolios,  including  the  advisory  fee  paid to the  investment  adviser,
   transfer agent fees, shareholder servicing expenses, and printing and postage
   for mailing statements, financial reports and prospectuses.

   The last section  lists the  increase or decrease in the value of  securities
   held in the  Portfolios.  Portfolios  realize a gain (or loss) when they sell
   their position in a particular security.  An unrealized gain (or loss) refers
   to the change in net  appreciation or  depreciation of the Portfolios  during
   the period.  "Net  Gain/(Loss) on Investments" is affected both by changes in
   the market  value of  Portfolio  holdings  and by gains (or losses)  realized
   during the reporting period.

66  Janus Aspen Series / December 31, 1998
<PAGE>

4. STATEMENT OF ASSETS AND LIABILITIES

   This  statement  is often  referred to as the  "balance  sheet." It lists the
   assets and  liabilities  of the  Portfolios  on the last day of the reporting
   period.

   The  Portfolios'  assets are calculated by adding the value of the securities
   owned, the receivable for securities sold but not yet settled, the receivable
   for  dividends  declared  but not  yet  received  on  stocks  owned,  and the
   receivable  for Portfolio  shares sold to investors but not yet settled.  The
   Portfolios' liabilities include payables for securities purchased but not yet
   settled,  Portfolio  shares  redeemed but not yet paid, and expenses owed but
   not yet paid. Additionally, there may be other assets and liabilities such as
   forward currency contracts.

   The last line of this  statement  reports the net asset value (NAV) per share
   on the last day of the reporting period for each class of the Portfolio.  The
   NAV is  calculated  by dividing  the  Portfolios'  net assets  (assets  minus
   liabilities) by the number of shares outstanding.

5. STATEMENT OF CHANGES IN NET ASSETS

   This statement reports the increase or decrease in the Portfolios' net assets
   during  the  reporting  period.  Changes  in the  Portfolios'  net assets are
   attributable to investment operations,  dividends,  distributions and capital
   share  transactions.  This is important to investors because it shows exactly
   what caused the Portfolios' net asset size to change during the period.

   The first section summarizes the information from the Statement of Operations
   regarding   changes  in  net  assets  due  to  the   Portfolios'   investment
   performance.  The  Portfolios'  net  assets  may also  change  as a result of
   dividend and capital gains  distributions to investors.  If investors receive
   their  dividends  in cash,  money is taken  out of the  Portfolio  to pay the
   distribution.  If investors  reinvest their  dividends,  the  Portfolios' net
   assets will not be affected.  If you compare each  Portfolio's  "Net Decrease
   from

   Dividends and Distributions" to the "Reinvested dividends and distributions,"
   you'll  notice  that  dividend   distributions  had  little  effect  on  each
   Portfolio's  net  assets.  This is because the  majority  of Janus  investors
   reinvest their distributions.

   The reinvestment of dividends is included under "Capital Share Transactions."
   "Capital  Shares" refers to the money investors  contribute to the Portfolios
   through purchases or withdrawal via redemptions.  Each Portfolio's net assets
   will  increase and decrease in value as investors  purchase and redeem shares
   from a Portfolio.

   The section  entitled "Net Assets  Consist of" breaks down the  components of
   the Portfolios' net assets. Because Portfolios must distribute  substantially
   all  earnings,  you'll  notice  that a  significant  portion of net assets is
   shareholder capital.

                                      Janus Aspen Series / December 31, 1998  67
<PAGE>

Explanations of | Charts, Tables and Financial Statements (continued)

6. FINANCIAL HIGHLIGHTS

   This schedule  provides a per-share  breakdown of the components  that affect
   the net asset value (NAV) for  current  and past  reporting  periods for each
   class of the  Portfolio.  Not only does this  table  provide  you with  total
   return, it also reports total  distributions,  asset size, expense ratios and
   portfolio turnover rate.

   The first line in the table  reflects  the NAV per share at the  beginning of
   the reporting  period.  The next line reports the net  investment  income per
   share,  which  comprises  dividends and interest  income earned on securities
   held by the  Portfolios.  Following  is the  total  of  gains,  realized  and
   unrealized.  Dividends and distributions are then subtracted to arrive at the
   NAV per share at the end of the period.

   Also included are the expense  ratios,  or the  percentage of net assets that
   was used to cover operating  expenses during the period.  Expense ratios vary
   across the Portfolios for a number of reasons,  including the  differences in
   management fees, average  shareholder account size, the frequency of dividend
   payments  and  the  extent  of  foreign  investments,  which  entail  greater
   transaction costs.

   The   Portfolios'   expenses   may  be  reduced   through   expense-reduction
   arrangements.  These arrangements  include the use of brokerage  commissions,
   uninvested cash balances earning  interest or balance credits.  The Statement
   of Operations  reflects total expenses before any such offset,  the amount of
   offset and the net  expenses.  The  expense  ratios  listed in the  Financial
   Highlights  reflect total expenses both prior to any expense offset and after
   the offsets.

   Expense   ratios  prior  to  any  expense   offset  are  part  of  disclosure
   requirements  imposed  in  1996.  Years  prior  to 1995 do not  reflect  this
   information.

   The ratio of net  investment  income  summarizes the income earned divided by
   the average  net assets of a Portfolio  during the  reporting  period.  Don't
   confuse this ratio with a Portfolio's  yield. The net investment income ratio
   is not a true  measure of a  Portfolio's  yield  because it doesn't take into
   account the dividends distributed to the Portfolio's investors.

   The next ratio is the portfolio  turnover rate, which measures the buying and
   selling  activity in a  Portfolio.  Portfolio  turnover is affected by market
   conditions, changes in the size of a Portfolio, the nature of the Portfolio's
   investments and the investment  style of the portfolio  manager.  A 100% rate
   implies that an amount  equal to the value of the entire  Portfolio is turned
   over in a year;  a 50% rate means  that an amount  equal to the value of half
   the Portfolio is traded in a year; and a 200% rate means that an amount equal
   to the value of the Portfolio is sold every six months.

68  Janus Aspen Series / December 31, 1998
<PAGE>

                                             Report of | Independent Accountants

To the Trustees and Shareholders
of Janus Aspen Series

In our opinion, the accompanying statements of assets and liabilities, including
the schedules of  investments,  and the related  statements of operations and of
changes  in net assets  and the  financial  highlights  present  fairly,  in all
material respects, the financial position of 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, Janus Aspen Equity Income Portfolio,
Janus Aspen Growth and Income Portfolio,  Janus Aspen Flexible Income Portfolio,
Janus  Aspen  High-Yield  Portfolio,  and Janus  Aspen  Money  Market  Portfolio
(constituting the Janus Aspen Series, hereafter referred to as the "Portfolios")
at December 31, 1998, the results of each of their  operations for the year then
ended, the changes in each of their net assets and the financial  highlights for
each of the periods indicated,  in conformity with generally accepted accounting
principles.  These  financial  statements  and financial  highlights  (hereafter
referred to as "financial statements") are the responsibility of the Portfolios'
management;  our  responsibility  is to express  an  opinion on these  financial
statements  based on our  audits.  We  conducted  our audits of these  financial
statements  in accordance  with  generally  accepted  auditing  standards  which
require that we plan and perform the audit to obtain reasonable  assurance about
whether the financial  statements  are free of material  misstatement.  An audit
includes  examining,  on a test  basis,  evidence  supporting  the  amounts  and
disclosures in the financial  statements,  assessing the  accounting  principles
used and  significant  estimates made by management,  and evaluating the overall
financial  statement  presentation.  We believe that our audits,  which included
confirmation  of  securities  at December  31, 1998 by  correspondence  with the
custodian  and  brokers,  provide a reasonable  basis for the opinion  expressed
above.

PricewaterhouseCoopers LLP

/s/ PricewaterhouseCoopers LLP

Denver, Colorado
February 3, 1999

                                        Euro-Conversion | Discussion (unaudited)

On  January  1, 1999,  eleven  European  countries  were  converted  to a common
currency:   Austria,   Belgium,   Finland,  France,  Germany,   Ireland,  Italy,
Luxembourg,  Netherlands, Portugal, and Spain. Investments traded in the markets
of these  countries  are  denominated  in the new  currency,  referred to as the
"Euro."  Conversion to the Euro may present  certain risks to investments of the
Funds  held in one of the  currencies  that is being  replaced.  Janus  Capital,
however, does not believe that the conversion will have a material impact on the
Portfolios' investments.

                                              Year 2000 | Discussion (unaudited)

Preparing  for  Year  2000 is a high  priority  for  Janus  Capital,  which  has
established a dedicated  group to address this issue.  Janus Capital has devoted
considerable  internal  resources and has engaged one of the foremost experts in
the field to help achieve Year 2000 readiness. Janus Capital does not anticipate
that Year  2000-related  issues  will have a material  impact on its  ability to
continue to provide the  Portfolios  with  service at current  levels;  however,
Janus Capital cannot make any  assurances  that the steps it has taken to ensure
Year 2000 readiness will be successful.  In addition,  there can be no assurance
that Year 2000  issues  will not affect the  companies  in which the  Portfolios
invest or worldwide markets and economies.

                                      Janus Aspen Series / December 31, 1998  69



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