PRICE T ROWE MID CAP GROWTH FUND INC
N-30D, 1996-08-12
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<PAGE>
 
Semiannual Report


                  Mid-Cap
                  Growth
                  Fund

                  June 30, 1996


[LOGO OF T. ROWE PRICE APPEARS HERE]
<PAGE>
 
   Report Highlights
   -----------------

 .  Despite rising interest rates, the stock market extended its long rally
   through the first half of 1996.

 .  Retail and energy service stocks performed particularly well, reflecting
   accelerating economic growth and higher oil and natural gas prices.

 .  Your fund provided a strong 13.11% return for the first six months, exceeding
   the S&P 500 and S&P MidCap Indexes as well as its Lipper peer group average.

 .  We trimmed our retail holdings as their prices surged, increased exposure to
   rural cellular communications companies, and cautiously added to our
   technology position on weakness in that sector.

 .  After 18 months of almost ideal equity market conditions, we see numerous
   warning flags. While the near-term outlook is uncertain, we believe investors
   will increasingly look to growth stocks as the long economic expansion ages.
 
<PAGE>
 
Fellow Shareholders


In spite of rising interest rates, the stock market turned in a strong
performance in the first half of 1996, continuing a powerful surge that began in
December 1994.  While the medium-sized companies represented by the unmanaged
Standard & Poor's MidCap Index lagged the large-company S&P 500 in both the
first half of 1996 and the last 12 months, the Mid-Cap Growth Fund outperformed
both benchmarks as well as an average of other mid-cap funds during these
periods.

<TABLE> 
<CAPTION> 

 Performance Comparison
 ----------------------------------------------------
 Periods Ended 6/30/96           6 Months  12 Months
 ----------------------------------------------------
 <S>                             <C>       <C> 
 Mid-Cap Growth Fund              13.11%     34.45% 
 ....................................................
 S&P MidCap Index                  9.22      21.59
 ....................................................
 S&P 500 Index                    10.10      26.00  
 .................................................... 
 Lipper Mid Cap Funds Average     11.35      25.33
 .................................................... 
</TABLE> 

Since its inception on June 30, 1992, your fund has gained 151.39%.

MARKET
ENVIRONMENT

Many observers, ourselves included, thought the S&P 500's 37.6% gain in 1995,
its best performance since 1958, would be a difficult act to follow.
Nevertheless, the stock market showed surprising resiliency in the face of
rising long-term interest rates, which have climbed more than one percentage
point from their lows.

With little but election-year bickering emanating from Washington, investors
shifted their attention to the economy.  While business activity began 1996 in a
slow-growth mode, signs of an acceleration started to appear late in the first
quarter, fanning fears of inflation and driving up interest rates.  Propelled by
huge cash inflows into equity mutual funds, however, the stock market continued
its ascent.  A rising dollar also made U.S. investments more attractive to
foreigners for the first time in several years.

PORTFOLIO REVIEW

Driven by better sales results in March, April, and May, retail stocks scored
big gains in the first half.  Energy service stocks were also


1
<PAGE>
 
ONCE AGAIN, THE TOP CONTRIBUTORS ... CAME FROM A CROSS-SECTION OF INDUSTRIES.

strong performers, benefiting from higher natural gas prices and rising demand.
Technology stocks, which led the market in 1995, were mixed: while
communications issues surged, many other groups, such as semiconductors and
consumer software, faltered badly.

Once again, the top contributors to your fund's performance came from a cross-
section of industries.  The first half's top contributors were Republic
Industries, a fast-growing company involved in electronic security systems, used
car retailing, and waste disposal, which announced several major acquisitions
during the period; National Data, a processor of credit card and health care
information, which announced a joint venture with MasterCard; and HFS, a hotel
and real estate agency franchiser, which recently announced its entry into the
rental car business and continued to exceed investors' earnings estimates by a
significant margin.

The worst detractors to performance in the first half were St. Jude Medical, a
manufacturer of pacemakers and heart valves whose earnings gains slowed; and
Mobile Telecommunication Technologies, a nationwide paging company which fumbled
a new product introduction.

INVESTMENT STRATEGY

The fund performed well in the first half even though the stock market was not
particularly well suited to our investment style.  The ebullient market
environment has led to abundant speculation, particularly in areas emphasizing
conceptual themes, such as the Internet, where substantial sales and earnings
are years away, at best. Most of our holdings are companies with proven business
concepts and the ability to grow sales and earnings at reasonable rates.  Many
of these compete in mundane industries such as industrial gas distribution,
electronic security systems, and payroll processing, but we believe their
businesses will thrive long after Wall Street's infatuation with the Internet
has faded.

There were only modest changes in the industry weightings of the fund in the
last six months, and we remain well diversified across a range of sectors, as
shown on the next page.

We trimmed some of our retail holdings in late spring as the stocks reacted
euphorically to a consumer rebound.  We see less long-term


2
<PAGE>
 
opportunity in the sector than 5 and 10 years ago.  The megatrend in retailing,
upon which many fortunes were made in the 1980s and early 1990s, was the
development of discount superstore chains in many different categories.  There
are few niches left to exploit.  However, we will continue to own companies that
we feel have good long-term growth prospects.             

<TABLE>                                                  
<CAPTION>                                                
                                                         
Industry Diversification                                 
- --------------------------------------------------       
                         Percent of   Percent of         
                         Net Assets   Net Assets         
                          12/31/95     6/30/96           
- --------------------------------------------------       
<S>                      <C>          <C>                
Financial                       9%         10%           
 ..................................................       
Health Care                    10          10            
 ..................................................       
Consumer                       17          14            
 ..................................................       
Technology                      6           9            
 ..................................................       
Business Services              32          31            
 ..................................................       
Energy                          6           6            
 ..................................................       
Industrial                      9           9            
 ..................................................       
Basic Materials                 2           3            
 ..................................................       
Reserves                        9           8            
- --------------------------------------------------       
Total                       100.0%      100.0%           
                                                         
</TABLE>                                                  

While we are still significantly underweighted in technology stocks relative to
our benchmarks and many other growth stock funds, we have modestly increased our
exposure, particularly in areas such as semiconductors, where stocks are down as
much as 50% from their highs.  We remain cautious, nevertheless, because we view
the technology sector as very cyclical, as we have discussed in previous
reports.  This year's decline in technology issues was precipitated primarily by
a slowdown in demand growth; margins, however, are still near record (and
unsustainably high) levels for most of these companies.  Still, we believe that
many areas of technology will experience tremendous growth in the years ahead,
and the stocks will bottom well ahead of industry fundamentals.  We will
continue to pursue an incremental approach, adding to our positions as the
stocks adjust.

Within the business services sector, we added to our holdings in cellular
telephone service providers.  Although the growth rates of these companies are
beginning to slow, many are still increasing their revenues and cash flows well
in excess of 40% annually.  The market is concerned that the new competitors
recently licensed by the Federal Trade Commission (FTC) will pressure existing
operators.  While this may well happen, the established cellular companies have
several advantages the upstarts lack including infrastructure, customers,
revenues, cash flows, and, in some cases, visible earnings.  The companies we
own are focused on rural


3
<PAGE>
 
America, where we believe cellular has an advantage over the technology of their
newest competitors.  Many of these rural cellular stocks are trading near three-
year lows.

OUTLOOK

For the last 18 months, we have experienced investment nirvana: an economy
growing fast enough to drive increasing corporate profits, but (until recently)
growing slowly enough to keep interest rates down.  We see some challenges
looming.  Interest rates have risen significantly without disturbing a somewhat
speculative stock market, and we wonder how long this can persist.  The
political pendulum seems to be reversing: hostility toward business and the
investment community has been manifested lately in several FTC rulings, the
Clinton Administration's resolute opposition to capital gains tax reduction, and
in legislation increasing the minimum wage.  There is also nascent evidence that
the widespread corporate cost-cutting initiatives of recent years, which have
driven corporate profits and, to some extent, the stock market, are winding down
or possibly reversing.  One final, critical issue to monitor is inflation. While
we do not expect a resurgence, there are disquieting signs in the labor and
commodities markets, and we believe that we have seen the lows in inflation for
this cycle.

We would not be surprised to encounter a stock market correction, but we remain
optimistic about the long-term prospects for mid-cap growth companies.  The
growth rates of our portfolio companies are significantly above the market as a
whole, yet their average price/earnings ratio is only modestly higher.  As this
long expansion ages, we believe investors will increasingly seek the consistent
earnings gains of true growth stocks.

Respectfully submitted,

/s/ Brian W. H. Berghuis

Brian W. H. Berghuis
President and
Chairman of the Investment Advisory Committee
July 15, 1996

4
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- -------------------------------------------------------------------- 

<TABLE> 
<CAPTION>

Portfolio Highlights
- --------------------------------------------------------------------   

   TWENTY-FIVE LARGEST HOLDINGS
                                                         Percent of
                                                         Net Assets
                                                           6/30/96
- --------------------------------------------------------------------    
<S>                                                      <C> 
ADT                                                          2.5%
 .................................................................... 
Cardinal Health                                              1.8
 .................................................................... 
Quorum Health Group                                          1.8
 ....................................................................  
ACE Limited                                                  1.8
 ....................................................................  
Circuit City Stores                                          1.7
- --------------------------------------------------------------------    
National Data                                                1.7
 ....................................................................  
TriMas                                                       1.7
 ....................................................................  
SunGard Data Systems                                         1.7
 ....................................................................  
Danaher                                                      1.7
 ....................................................................  
Smith International                                          1.6
- --------------------------------------------------------------------    
Boston Chicken                                               1.6
 ....................................................................  
Olsten                                                       1.6
 ....................................................................  
Weatherford Enterra                                          1.5
 ....................................................................  
Apria Healthcare                                             1.5
 ....................................................................  
OEA                                                          1.5
- --------------------------------------------------------------------    
Vanguard Cellular                                            1.5
 ....................................................................  
Franklin Resources                                           1.5
 ....................................................................  
Cox Communications                                           1.5
 ....................................................................  
Great Lakes Chemical                                         1.4
 ....................................................................  
USA Waste Services                                           1.4
- --------------------------------------------------------------------    
PriceCostco                                                  1.4
 ....................................................................  
Eckerd                                                       1.4
 ....................................................................  
PartnerRe Holdings                                           1.4
 ....................................................................  
Republic Industries                                          1.3
 ....................................................................  
Cooper Cameron                                               1.3
- --------------------------------------------------------------------    
Total                                                       39.8%

</TABLE>


5
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------


<TABLE> 
<CAPTION> 

Portfolio Highlights
- -------------------------------------------------------------------------------

  CONTRIBUTIONS TO THE CHANGE IN NET ASSET VALUE PER SHARE


  6 Months Ended June 30, 1996

  Ten Best Contributors         Ten Worst Contributors                
  ---------------------------------------------------------------------
  <S>                     <C>   <C>                                <C>  
  Republic Industries*    19c   St. Jude Medical                   -8c 
  ............................  ....................................... 
  National Data           17    Mobile Telecommunication Tech.**    7 
  ............................  ....................................... 
  HFS                     14    Alliance Entertainment *            7 
  ............................  ....................................... 
  USA Waste Services      14    Revco                               7 
  ............................  ....................................... 
  ADT                     14    Broderbund Software                 6 
  ............................  ....................................... 
  Danaher                 12    ADVO                                6 
  ............................  ....................................... 
  Cardinal Health         11    Exide *                             6 
  ............................  ....................................... 
  SunGard Data Systems    11    Adobe Systems                       5 
  ............................  ....................................... 
  Kohl's                  11    General Nutrition                   5 
  ............................  .......................................  
  OEA                     11    PacifiCare Health Systems           5 
  ----------------------------  --------------------------------------- 
  Total                  134c   Total                             -62c 
</TABLE> 

12 Months Ended June 30, 1996

<TABLE> 
<CAPTION> 

  Ten Best Contributors         Ten Worst Contributors                
  ---------------------------------------------------------------------
  <S>                     <C>   <C>                                <C> 
  HFS                     45c   Mobile Telecommunication Tech. ** -17c
  ............................  .......................................    
  ADT                     25    Office Depot **                     7  
  ............................  .......................................    
  Tommy Hilfiger          23    Alliance Entertainment *            7   
  ............................  .......................................    
  Guidant **              20    Broderbund Software                 6    
  ............................  .......................................    
  Republic Industries *   19    Exide *                             6     
  ............................  .......................................    
  Smith International     19    American Portable Telecom *         5      
  ............................  .......................................    
  National Data           17    Adobe Systems                       4       
  ............................  .......................................    
  Kohl's                  16    Altera                              3       
  ............................  .......................................    
  Catalina Marketing      16    Albany International **             2    
  ............................  .......................................    
  Cardinal Health         15    Rustenburg Platinum *               2    
  ----------------------------  ---------------------------------------    
  Total                  215c   Total                             -59c     
</TABLE>

 *   Position added
 **  Position eliminated

6
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------

Performance Comparison
- --------------------------------------------------------------------

This chart shows the value of a hypothetical $10,000 investment in the fund over
the past 10 fiscal year periods or since inception (for funds lacking 10-year
records). The result is compared with a broad-based average or index. The index
return does not reflect expenses, which have been deducted from the fund's
return.

                      [MID-CAP GROWTH FUND APPEARS HERE]


Average Annual Compound Total Return
- --------------------------------------------------------------------

This table shows how the fund would have performed each year if its actual (or
cumulative) returns for the periods shown had been earned at a constant rate.

<TABLE> 
<CAPTION> 

                                                           Since    Inception
Periods Ended 6/30/96                 1 Year  3 Years  Inception         Date
- -----------------------------------------------------------------------------
<S>                                   <C>     <C>      <C>          <C>     
Mid-Cap Growth Fund                   34.45%   22.45%     25.92%      6/30/92
 .............................................................................
</TABLE> 

Investment return and principal value represent past performance and will vary.
Shares may be worth more or less at redemption than at original purchase.


7
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------
Unaudited

<TABLE> 
<CAPTION> 

Financial Highlights                   For a share outstanding throughout each period
- -------------------------------------------------------------------------------------

 
                              6 Months        Year                            6/30/92
                                 Ended       Ended                                 to
                               6/30/96    12/31/95    12/31/94    12/31/93   12/31/92
<S>                          <C>         <C>         <C>         <C>         <C> 
NET ASSET VALUE
Beginning of period          $   20.13   $   14.85   $   15.18   $   12.27   $  10.00
                             ..........................................................
Investment activities
 Net investment income            0.05           -           -*          -*      0.01*
 Net realized and
 unrealized gain (loss)           2.59        6.07        0.04        3.21       2.44
                             ..........................................................
 Total from
 investment activities            2.64        6.07        0.04        3.21       2.45
                             ..........................................................
Distributions
 Net realized gain                   -       (0.79)      (0.37)      (0.30)     (0.18)
                             ..........................................................
NET ASSET VALUE
End of period                $   22.77   $   20.13   $   14.85   $   15.18   $  12.27
                             ----------------------------------------------------------

<CAPTION> 

Ratios/Supplemental Data

<S>                             <C>         <C>          <C>        <C>        <C>    
Total return                    13.11%      40.95%       0.29%*     26.24%*    24.54%*
 .......................................................................................
Ratio of expenses to
average net assets               1.01%+      1.25%       1.25%*      1.25%*     1.25%+*
 .......................................................................................
Ratio of net investment
income to average
net assets                       0.37%+    (0.01)%       0.02%*    (0.12)%*     0.16%+*
 .......................................................................................
Portfolio turnover rate          36.8%+      57.5%       48.7%       62.4%      51.9%+
 .......................................................................................
Average commission
rate paid                    $  0.1074           -           -           -          -
 .......................................................................................
Net assets, end of period
(in thousands)               $ 654,698   $ 263,987   $ 100,523   $  65,426   $ 27,606
 .......................................................................................
</TABLE>

*  Excludes expenses in excess of a 1.25% voluntary expense limitation in effect
   through 12/31/95.
+  Annualized.


The accompanying notes are an integral part of these financial statements.

8
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------
Unaudited                                              June 30, 1996

<TABLE> 
<CAPTION> 

Statement of Net Assets                Shares/Par            Value
- --------------------------------------------------------------------
                                                      In thousands
Common Stocks  91.4%

FINANCIAL  9.6%
<S>                                       <C>           <C> 
Bank and Trust  0.9%
Marshall & Ilsley                         210,000       $    5,841
 ....................................................................
                                                             5,841
                                                        ............
Insurance  5.3%
ACE Limited                               250,000           11,750
 ....................................................................
PartnerRe Holdings ADR                    300,000            8,981
 ....................................................................
PMI Group                                 200,000            8,500
 ....................................................................
Zurich Reinsurance                        170,000            5,355
 ....................................................................
                                                            34,586
                                                        ............
Financial Services  3.4%
Franklin Resources                        160,000            9,760
 ....................................................................
Money Store                               325,000            7,130
 ....................................................................
Oxford Resources (Class A) *              225,000            5,273
 ....................................................................
                                                            22,163
                                                        ............

Total Financial                                             62,590
                                                        ............
HEALTH CARE  10.3%

Pharmaceuticals  0.4%
Medeva ADR                                175,000            2,712
 ....................................................................
                                                             2,712
                                                        ............
Biotechnology  1.3%
Biogen *                                  150,000            8,203
 ....................................................................
                                                             8,203
                                                        ............
Medical Instruments and Devices  2.4%
St. Jude Medical *                        250,000            8,344
 ....................................................................
Sybron International *                    300,000            7,500
 .................................................................... 
                                                            15,844
                                                        ............ 
Health Care Services  6.2%
Apria Healthcare *                        320,000           10,040
 .................................................................... 
Cardinal Health                           165,000           11,901
 .................................................................... 
PacifiCare Health Systems (Class B) *     100,000            6,787
 .................................................................... 
Quorum Health Group *                     450,000           11,869
 .................................................................... 
                                                            40,597
                                                        ............ 
Total Health Care                                           67,356
                                                        ............   
</TABLE>

9
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------

<TABLE> 
<CAPTION> 

                                     Shares/Par              Value  
- --------------------------------------------------------------------
                                                      In thousands   
 
<S>                                   <C>             <C>   
CONSUMER  13.5%

Soft Goods Retailers  1.1%
Kohl's *                                200,000       $      7,325
 .................................................................... 
                                                             7,325
                                                        ............    
Hard Goods Retailers  6.7%
Circuit City Stores                     310,000             11,199
 ....................................................................  
Eckerd *                                400,000              9,050
 ....................................................................  
General Nutrition *                     220,000              3,836
 ....................................................................  
PriceCostco *                           425,000              9,137
 ....................................................................  
Revco *                                 300,000              7,163
 ....................................................................   
Rite Aid                                115,000              3,421
                                                        ............      
                                                            43,806

Consumer Non-Durables  1.9%
Tommy Hilfiger *                        100,000              5,362
 ....................................................................   
Tupperware *                            175,000              7,394
 ....................................................................    
                                                            12,756
                                                        ............      
Restaurants  1.6%
Boston Chicken *                        325,000             10,542
 ....................................................................     
                                                            10,542
                                                        ............       
Consumer Services  2.2%
America Online *                         18,400                803
 .................................................................... 
CUC International *                     190,000              6,745
 ....................................................................     
La Quinta Inns                          200,000              6,700
 .................................................................... 
                                                            14,248
 ....................................................................      
Total Consumer                                              88,677           
                                                        ............        
TECHNOLOGY  8.6%

Computer Software  5.1%
Adobe Systems                           150,000              5,353
 .................................................................... 
BMC Software *                           90,000              5,366
 ....................................................................      
Broderbund Software *                   100,000              3,238
 ....................................................................      
Informix *                              100,000              2,244
 ....................................................................      
Intuit *                                145,000              6,815
 ....................................................................      
PLATINUM technology *                   360,000              5,422
 ....................................................................      
Synopsys *                              125,000              4,984
 ....................................................................       
                                                            33,422
                                                        ............         
</TABLE>

10
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------

<TABLE>                                                            
<CAPTION>                                                          
                                                                   
                                     Shares/Par              Value  
- --------------------------------------------------------------------
                                                      In thousands   
                                                                   
<S>                                  <C>                     <C>    
Networking and Telecom Equipment  1.2%

Ascend Communications *                  30,000         $    1,686
 ....................................................................       
Shiva *                                  75,000              6,000
 ....................................................................       
                                                             7,686
                                                        ............          
Semiconductors  2.3%

Altera *                                125,000              4,742
 ....................................................................       
Maxim Integrated Products *             160,000              4,370
 ....................................................................        
Xilinx *                                190,000              6,021
 ....................................................................         
                                                            15,133
                                                        ............
Total Technology                                            56,241
                                                        ............            
BUSINESS SERVICES  31.5%           
                                   
Telecom Services  8.5%             

360 Communications *                    300,000              7,200
 ....................................................................         
American Portable Telecom *             480,500              5,045
 ....................................................................         
Comcast (Class A Special)               370,000              6,799
 ....................................................................         
Cox Communications (Class A) *          450,000              9,731
 ....................................................................         
Palmer Wireless *                       325,000              6,561
 ....................................................................         
Telephone and Data Systems              170,000              7,650
 ....................................................................         
U. S. Cellular *                         90,000              2,790
 ....................................................................         
Vanguard Cellular (Class A) *           450,000              9,872
 ....................................................................         
                                                            55,648
                                                        ............  
Computer Services  5.6%

BDM International *                     155,000              7,208
 .................................................................... 
Ceridian *                              149,400              7,545
 ....................................................................         
National Data                           325,000             11,131
 ....................................................................         
SunGard Data Systems *                  275,000             11,017
 ....................................................................          
                                                            36,901
                                                        ............    
Distribution  3.7%

Airgas *                                400,000              7,600
 ....................................................................          
Alco Standard                           140,000              6,335
 ....................................................................          
Alliance Entertainment *                425,000              2,922
 ....................................................................          
JP Foodservice *                        137,600              3,388
 ....................................................................          
MSC (Class A) *                         115,000              3,709
 ....................................................................           
                                                            23,954
                                                        ............     
</TABLE>

11
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------

<TABLE>                                                            
<CAPTION>                                                          
                                                                   
                                     Shares/Par              Value  
- --------------------------------------------------------------------
                                                      In thousands   
                                                                   
<S>                                  <C>                     <C>   
Media and Advertising  2.4%

ADVO                                    225,000            $ 2,334
 ....................................................................           
Catalina Marketing *                     75,000              6,862
 ....................................................................           
Scholastic *                            110,000              6,848
 ....................................................................            
                                                            16,044
                                                        ............      
Environmental  4.5%

Philip Environmental *                  650,000              5,119
 ....................................................................
Republic Industries *                   300,000              8,756
 ....................................................................            
Sanifill *                              125,000              6,156
 ....................................................................            
USA Waste Services *                    310,000              9,184
 .................................................................... 
                                                            29,215
                                                        ............       
Miscellaneous Business Services  6.8%

ADT *                                   850,000             16,044
 ....................................................................
Career Horizons *                       105,000              3,675
 ....................................................................  
Corporate Express *                     160,000              6,410
 ....................................................................  
HFS *                                   115,000              8,050
 ....................................................................  
Olsten                                  350,000             10,281
 ....................................................................   
                                                            44,460
                                                        ............       
Total Business Services                                    206,222
                                                        ............        
ENERGY  6.2%

Energy Services  6.2%

Camco International                     175,000              5,928
 .................................................................... 
Cooper Cameron *                        200,000              8,750
 ....................................................................   
Halliburton                             100,000              5,550
 ....................................................................   
Smith International *                   350,000             10,544
 ....................................................................   
Weatherford Enterra *                   335,000             10,050
 ....................................................................    
Total Energy                                                40,822            
                                                        ............         
INDUSTRIAL  8.8%

Automobiles and Related  2.1%

Exide                                   150,000              3,638
 ....................................................................    
OEA                                     265,000              9,937
 ....................................................................     
                                                            13,575
                                                        ............          
Specialty Chemicals  2.1%

Great Lakes Chemical                    150,000              9,338
 ....................................................................     
Polymer Group *                         254,000              4,445
 ....................................................................      
                                                            13,783
                                                        ............           
</TABLE>


12
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------

<TABLE> 
<CAPTION> 

                                     Shares/Par              Value  
- --------------------------------------------------------------------
                                                      In thousands   
 
<S>                                  <C>                     <C>
Machinery  4.6%

Danaher                                 250,000         $   10,875
 ....................................................................      
Teleflex                                174,500              8,332
 ....................................................................      
TriMas                                  475,000             11,103
 ....................................................................       
                                                            30,310
                                                        ............            
Total Industrial                                            57,668
                                                        ............  

BASIC MATERIALS  2.7%

Mining  2.7%

Cambior                                 400,000              5,350
 ....................................................................       
Pegasus Gold *                          375,000              4,594
 ....................................................................       
Rustenberg Platinum (ZAR)               201,356              3,137
 ....................................................................       
TVX Gold *                              650,000              4,712
 ....................................................................       
Total Basic Materials                                       17,793
                                                        ............ 
Miscellaneous Common Stocks  0.2%                            1,260
                                                        ............        
Total Common Stocks (Cost $524,164)                        598,629
                                                        ............ 

Short-Term Investments  9.0%

U.S. Government Agency 
Obligations  6.7%

Federal Farm Credit Bank Discount 
Notes, 5.20%
7/1/96-7/19/96                      $ 9,295,000              9,282
 ....................................................................         
Federal Home Loan Mortgage Discount
Notes 5.27-5.52%, 7/1/96-7/31/96     24,489,000             24,441
 ....................................................................          
Federal National Mortgage Association 
Discount Notes                       10,000,000              9,948
5.19-5.30%, 7/30/96-8/13/96
 ....................................................................           
                                                            43,671
                                                        ............  
U.S. Government Obligations  2.3%

United States Treasury Bills, 
5.005-5.04%, 7/5/96-9/12/96          15,000,000             14,905
 ....................................................................           
                                                            14,905
                                                        ............   
Total Short-Term Investments (Cost $58,576)                 58,576
                                                        ............   
</TABLE>

13 
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------

<TABLE> 
<CAPTION>  
                                                             Value
- --------------------------------------------------------------------
                                                      In thousands
<S>                                                  <C> 
Total Investments in Securities

100.4% of Net Assets (Cost $582,740)                 $     657,205

Other Assets Less Liabilities                               (2,507)
                                                     ............... 
NET ASSETS                                           $     654,698
                                                     ---------------
Net Assets Consist of:

Accumulated net investment income - net 
 of distributions                                    $       1,434

Accumulated net realized gain/loss - net 
 of distributions                                           20,009

Net unrealized gain (loss)                                  74,466

Paid-in-capital applicable to 28,748,475 
 shares of $0.01 par value capital stock 
 outstanding; 1,000,000,000 shares authorized              558,789
                                                     ............... 
NET ASSETS                                           $     654,698
                                                     ---------------
NET ASSET VALUE PER SHARE                            $       22.77
                                                     ---------------
</TABLE>

  *  Non-income producing
ZAR  South African rand   


The accompanying notes are an integral part of these financial statements. 

14
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------
Unaudited

<TABLE> 
<CAPTION> 

Statement of Operations
- --------------------------------------------------------------------
In thousands
 
                                                          6 Months
                                                             Ended
                                                           6/30/96
<S>                                                    <C> 
Investment Income
Income
 Dividend                                              $     1,699
 Interest                                                    1,357
                                                       ........... 
 Total income                                                3,056
                                                       ...........  
Expenses
 Investment management                                       1,557
 Shareholder servicing                                         492
 Custody and accounting                                         64
 Registration                                                   59
 Prospectus and shareholder reports                             36
 Legal and audit                                                11
 Directors                                                       6
 Miscellaneous                                                   7
                                                       ...........  
 Total expenses                                              2,232
                                                       ...........  
Net investment income                                          824
                                                       ...........  
Realized and Unrealized Gain (Loss)                  

Net realized gain (loss)                             
 Securities                                                 16,919
 Foreign currency transactions                                  (7)
                                                       ...........  
 Net realized gain (loss)                                   16,912
                                                       ...........  
Change in net unrealized gain or loss on securities         27,774
                                                       ...........  
Net realized and unrealized gain (loss)                     44,686
                                                       ...........  
INCREASE (DECREASE) IN NET                           
ASSETS FROM OPERATIONS                                 $    45,510
                                                       ----------- 
</TABLE>

The accompanying notes are an integral part of these financial statements.

15
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------
Unaudited

<TABLE> 
<CAPTION> 

Statement of Changes in Net Assets
- --------------------------------------------------------------------
In thousands
 
                                                6 Months      Year
                                                   Ended     Ended
                                                 6/30/96  12/31/95
 <S>                                           <C>       <C> 
 Increase (Decrease) in Net Assets

 Operations
  Net investment income                        $     824 $     (22)
  Net realized gain (loss)                        16,912    11,953
  Change in net unrealized gain or loss           27,774    38,138
                                               .....................
  Increase (decrease) in net assets 
   from operations                                45,510    50,069
                                               .....................
 Distributions to shareholders
  Net realized gain                                    -    (9,790)
                                               .....................
 Capital share transactions *
  Shares sold                                    395,522   153,457
  Distributions reinvested                             -     9,273
  Shares redeemed                                (50,913)  (39,545)
                                               .....................
  Increase (decrease) in net assets from 
   capital share transactions                    344,609   123,185
                                               .....................
  Net equalization                                   592         -
                                               .....................
 Net Assets

 Increase (decrease) during period               390,711   163,464
 Beginning of period                             263,987   100,523
                                               .....................

 End of period                                 $ 654,698 $ 263,987
                                               ---------------------
* Share information
  Shares sold                                     17,981     8,079
  Distributions reinvested                             -       468
  Shares redeemed                                 (2,344)   (2,204)
                                               .....................
  Increase (decrease) in shares outstanding       15,637     6,343
</TABLE>


The accompanying notes are an integral part of these financial statements.

16
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------
Unaudited                                            June 30, 1996


Notes to Financial Statements
- --------------------------------------------------------------------

NOTE 1 - SIGNIFICANT ACCOUNTING POLICIES

T. Rowe Price Mid-Cap Growth, Inc. (the fund) is registered under the Investment
Company Act of 1940 as a diversified, open-end management investment company and
commenced operations on June 30, 1992.

Valuation  Equity securities listed or regularly traded on a securities exchange
are valued at the last quoted sales price at the time the valuations are made.
A security which is listed or traded on more than one exchange is valued at the
quotation on the exchange determined to be the primary market for such security.
Listed securities that are not traded on a particular day and securities that
are regularly traded in the over-the-counter market are valued at the mean of
the latest bid and asked prices.  Other equity securities are valued at a price
within the limits of the latest bid and asked prices deemed by the Board of
Directors, or by persons delegated by the Board, best to reflect fair value.

Short-term debt securities are valued at their cost which, when combined with
accrued interest, approximates fair value.

For purposes of determining the fund's net asset value per share, the U.S.
dollar value of all assets and liabilities initially expressed in foreign
currencies is determined by using the mean of the bid and offer prices of such
currencies against U.S. dollars quoted by a major bank.

Assets and liabilities for which the above valuation procedures are
inappropriate or are deemed not to reflect fair value are stated at fair value
as determined in good faith by or under the supervision of the officers of the
fund, as authorized by the Board of Directors.

Currency Translation  Assets and liabilities are translated into U.S. dollars at
the prevailing exchange rate at the end of the reporting period.  Purchases and
sales of securities and income and expenses are translated into U.S. dollars at
the prevailing exchange rate on the dates of such transactions.  The effect of
changes in foreign exchange rates on realized and unrealized security gains and
losses is reflected as a component of such gains and losses.

Other  Income and expenses are recorded on the accrual basis.  Investment
transactions are accounted for on the trade date.  Realized gains and losses are
reported on the identified cost basis.  Dividend income and distributions to
shareholders are recorded by the fund on the ex-dividend date.  Income and
capital gain distributions are determined in accordance with federal income tax

17
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------


regulations and may differ from those determined in accordance with generally
accepted accounting principles.

NOTE 2 - INVESTMENT TRANSACTIONS

    Purchases and sales of portfolio securities, other than short-term
    securities, aggregated $390,405,000 and $74,570,000, respectively, for the
    six months ended June 30, 1996.

NOTE 3 - FEDERAL INCOME TAXES

    No provision for federal income taxes is required since the fund intends to
    continue to qualify as a regulated investment company and distribute all of
    its taxable income.

    At June 30, 1996, the aggregate cost of investments for federal income tax
    and financial reporting purposes was $582,740,000, and net unrealized gain
    aggregated $74,465,000, of which $88,297,000 related to appreciated
    investments and $13,832,000 to depreciated investments.

NOTE 4 - RELATED PARTY TRANSACTIONS

    The investment management agreement between the fund and T. Rowe Price
    Associates, Inc. (the manager) provides for an annual investment management
    fee, of which $352,000 was payable at June 30, 1996. The fee is computed
    daily and paid monthly, and consists of an individual fund fee equal to
    0.35% of average daily net assets and a group fee. The group fee is based on
    the combined assets of certain mutual funds sponsored by the manager or Rowe
    Price-Fleming International, Inc. (the group). The group fee rate ranges
    from 0.48% for the first $1 billion of assets to 0.305% for assets in excess
    of $50 billion. At June 30, 1996, and for the six months then ended, the
    effective annual group fee rate was 0.33% and 0.34%, respectively. The fund
    pays a pro rata share of the group fee based on the ratio of its net assets
    to those of the group.

    Under the terms of the investment management agreement, the manager was
    required to bear any expenses through December 31, 1995, which would cause
    the fund's ratio of expenses to average net assets to exceed 1.25%.
    Thereafter, through December 31, 1997, the fund is required to reimburse the
    manager for

18
<PAGE>
 
T. Rowe Price Mid-Cap Growth Fund
- --------------------------------------------------------------------



these expenses, provided that average net assets have grown or expenses have
declined sufficiently to allow reimbursement without causing the fund's ratio of
expenses to average net assets to exceed 1.25%. Pursuant to this agreement,
$58,000 of unaccrued 1994-1995 fees were repaid during the six months ended June
30, 1996.

In addition, the fund has entered into agreements with the manager and two
wholly owned subsidiaries of the manager, pursuant to which the fund receives
certain other services.  The manager computes the daily share price and
maintains the financial records of the fund. T. Rowe Price Services, Inc., is
the fund's transfer and dividend disbursing agent and provides shareholder and
administrative services to the fund.  T. Rowe Price Retirement Plan Services,
Inc., provides subaccounting and recordkeeping services for certain retirement
accounts invested in the fund.  The fund incurred expenses pursuant to these
related party agreements totaling approximately $413,000 for the six months
ended June 30, 1996, of which $15,000 was receivable at period-end.


19
<PAGE>
 
T. Rowe Price Shareholder Services
- --------------------------------------------------------------------

To help shareholders monitor their current investments and make decisions that
accurately reflect their financial goals, T. Rowe Price offers a wide variety of
information and services -- at no extra cost.


KNOWLEDGEABLE SERVICE REPRESENTATIVES

     By Phone 1-800-225-5132 Available Monday through Friday from 8 a.m. to 10
     p.m. and weekends from 8:30 a.m. to 5 p.m. ET.

     In Person  Available in T. Rowe Price Investor Centers.


ACCOUNT SERVICES

     Checking  Available on most fixed income funds.

     Automatic Investing  From your bank account or paycheck.

     Automatic Withdrawal  Scheduled, automatic redemptions.

     Distribution Options  Reinvest all, some, or none of your distributions.

     Automated 24-Hour Services Including Tele*Access/(R)/ and T. Rowe Price
     OnLine.


DISCOUNT BROKERAGE*

     Individual Securities  Stocks, bonds, options, precious metals, and other
     securities at a savings over regular commission rates.


INVESTMENT INFORMATION

     Combined Statement  An overview of your T. Rowe Price accounts.

     Shareholder Reports Fund managers' reviews of their strategies and results.

     The T. Rowe Price Report A quarterly investment newsletter discussing
     markets and financial strategies.

     Performance Update  Quarterly review of all T. Rowe Price fund results.

     Insights Educational reports on investment strategies and financial
     markets.

     Investment Guides Asset Mix Worksheet, College Planning Kit, Personal
     Strategy Planner, Retirees Financial Guide, and Retirement Planning Kit.


*T. Rowe Price Discount Brokerage is a division of T. Rowe Price Investment
Services, Inc.  Member NASD/SIPC.

20
<PAGE>
 
T. Rowe Price Mutual Funds
- --------------------------------------------------------------------

STOCK FUNDS
 ......................

Domestic

Balanced

Blue Chip Growth

Capital Appreciation

Capital Opportunity

Dividend Growth

Equity Income

Equity Index

Growth & Income

Growth Stock

Health Sciences

Mid-Cap Growth

Mid-Cap Value

New America Growth

New Era

New Horizons*

OTC

Science & Technology

Small-Cap Value*

Spectrum Growth

Value


International/Global

Emerging Markets Stock

European Stock

Global Stock

International Discovery

International Stock

Japan

Latin America

New Asia


BOND FUNDS
 ......................

Domestic Taxable

Corporate Income

GNMA

High Yield

New Income

Short-Term Bond

Short-Term U.S. Government

Spectrum Income

Summit GNMA

Summit Limited-Term Bond

U.S. Treasury Intermediate

U.S. Treasury Long-Term


Domestic Tax-Free

California Tax-Free Bond

Florida Insured
Intermediate Tax-Free

Georgia Tax-Free Bond

Maryland Short-Term
Tax-Free Bond

Maryland Tax-Free Bond

New Jersey Tax-Free Bond

New York Tax-Free Bond

Summit Municipal Income

Summit Municipal Intermediate

Tax-Free High Yield

Tax-Free Income

Tax-Free Insured
Intermediate Bond

Tax-Free Short-Intermediate

Virginia Short-Term
Tax-Free Bond

Virginia Tax-Free Bond

International/Global

Emerging Markets Bond

Global Government Bond

International Bond

Short-Term Global Income


MONEY MARKET 
 ......................

Taxable

Prime Reserve

Summit Cash Reserves

U.S. Treasury Money


Tax-Free

California Tax-Free Money

New York Tax-Free Money

Summit Municipal
Money Market

Tax-Exempt Money


BLENDED ASSET
 ......................

Personal Strategy Balanced

Personal Strategy Growth

Personal Strategy Income

T. ROWE PRICE NO-LOAD
VARIABLE ANNUITY
 ......................

Equity Income Portfolio

International Stock Portfolio

Limited-Term Bond Portfolio

New America Growth Portfolio

Personal Strategy Balanced
Portfolio


*Closed to new investors.
<PAGE>
 
For yield, price, last transaction,
and current balance, 24 hours,
7 days a week, call:
1-800-638-2587 toll free

For assistance with your existing
fund account, call:
Shareholder Service Center
1-800-225-5132 toll free
625-6500 Baltimore area

T. Rowe Price
100 East Pratt Street
Baltimore, Maryland  21202

This report is authorized for distribution
only to shareholders and to others who have 
received a copy of the prospectus of the
T. Rowe Price Mid-Cap Growth Fund(R).

[LOGO OF T. ROWE PRICE APPEARS HERE]

T. Rowe Price Investment Services, Inc., Distributor  RPRTMCG  6/30/96


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