WARBURG PINCUS INSTITUTIONAL FUND INC
N-30D, 1996-08-26
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<PAGE>
<PAGE>
                           SEMIANNUAL
                             REPORT
                         April 30, 1996
               WARBURG PINCUS INSTITUTIONAL FUND, INC.
                  - INTERNATIONAL EQUITY PORTFOLIO
                  - SMALL COMPANY GROWTH PORTFOLIO




                             [Logo]
 
<PAGE>
<PAGE>
The  views of the Portfolios'  management are as of the  date of the letters and
holdings described in  this semiannual report  are as of  April 30, 1996;  these
views and holdings may have changed subsequent to these dates.


<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- INTERNATIONAL EQUITY PORTFOLIO
SEMIANNUAL REPORT
- --------------------------------------------------------------------------------
 
Dear Shareholder:                                                  June 21, 1996
 
   The  objective of Warburg  Pincus Institutional Fund  -- International Equity
Portfolio (the  'Portfolio') is  long-term capital  appreciation. The  Portfolio
aims  to tap into the strong growth  potential of today's world stock markets by
investing  primarily  in  companies  whose  principal  business  activities  and
interests are outside the U.S.
 
   For  the six months  ended April 30,  1996, the Portfolio  gained 15.20%, vs.
gains of 12.09% in the Lipper International Fund Index and 13.21% in the  Morgan
Stanley Europe, Australasia and Far East ('EAFE') Index.
 
   The  Portfolio's performance  for the six  months was driven  by timely stock
selection and,  broadly, by  its emphasis  on Asian-Pacific  markets, which  saw
strong  returns  over  the  period. The  Portfolio's  largest  country weighting
throughout remained Japan (29.1% of  net assets as of  April 30), which rose  on
signs  of continued  economic recovery,  an improved  earnings outlook  for many
companies, and  an expansionary  monetary  policy from  the  Bank of  Japan.  We
believe  that  the  prospects for  the  Japanese economy  and  Japanese equities
remain, in  general, favorable,  and that  the Portfolio  is well-positioned  in
terms  of its specific  holdings. By sector,  the Portfolio's largest weightings
are in two areas, machinery &  industrial components and retail, reflecting  our
view  that  Japan's  economic  recovery  will be  led  by  capital  spending and
consumption.
 
   As a defensive  measure, we continue  to hedge a  substantial portion of  the
Portfolio's  yen exposure, reflecting  our view that  the Japanese currency will
weaken vs. the U.S.  dollar. This strategy worked  to the Portfolio's  advantage
over the reporting period.
 
   Other  Asian-Pacific stocks  that contributed  positively to  the Portfolio's
performance include  its  holdings in  Hong  Kong, Indonesia,  South  Korea  and
Taiwan.  The  latter  two  markets,  which  combined  represented  10.1%  of the
Portfolio as of April  30, rebounded strongly  in April --  rising 11% and  25%,
respectively,  for the month  per Morgan Stanley  Capital International -- after
underperforming in 1995 and  through the first three  months of 1996. Our  long-
term  outlook on both  markets, and on  Asian-Pacific markets generally, remains
very positive, given what we consider to be their excellent growth prospects and
reasonable valuations.
 
<PAGE>
<PAGE>
   The Portfolio remained underweighted in Europe through the period, reflecting
our general view that better growth prospects exist elsewhere. But the Portfolio
saw positive results  from many  of its  European holdings,  notably its  German
stocks (Adidas and SGL Carbon, which both rose strongly despite general weakness
in  the German equity  market) and its  French stocks. The  French stock market,
after lagging in 1995, was Europe's strongest performer in local-currency  terms
through  the  first four  months  of 1996,  driven  by signs  that  its economic
troubles have begun to  ease. The Portfolio benefited  from this strength,  with
several  of its holdings (e.g., Lagardere Groupe, Fives-Lille and Scor) enjoying
particularly impressive gains. The Portfolio also benefited from our decision to
hedge its franc exposure,  since the French currency  weakened against the  U.S.
dollar  during the  period. We  remain positive  on the  outlook for  our French
stocks, believing that they are strong, well-managed businesses.
 
Richard H. King
Portfolio Manager
 
                                       2
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- SMALL COMPANY GROWTH PORTFOLIO
SEMIANNUAL REPORT
- --------------------------------------------------------------------------------
 
Dear Shareholder:                                                  June 21, 1996
 
   The objective of Warburg  Pincus Institutional Fund  -- Small Company  Growth
Portfolio  (the  'Portfolio')  is  capital  growth.  The  Portfolio  is  a  non-
diversified  management  investment  company  that  pursues  its  objective   by
investing primarily in equity securities of domestic companies with small market
capitalizations (i.e., less than $1 billion at the time of initial purchase).
 
   For  the  four months  ended April  30, 1996  (the Portfolio's  inception was
December 29, 1995), the  Portfolio gained 25.00%,  vs. a gain  of 10.72% in  the
Russell 2000 Index.
 
   The  Portfolio's outperformance of its benchmark was the result of good stock
selection and the  generally strong  gains shown  by its  more heavily  weighted
industries.  These included computers (15.8% of assets as of April 30), business
services (11.4%) and health  care (10.4%), and we  believe that our holdings  in
these  areas  continue  to  hold favorable  prospects.  The  Portfolio  also saw
generally strong performances from holdings in other sectors and industries that
we have emphasized, including electronics (5.4% of assets at the end of  April),
oil  services (5.2%), pharmaceuticals  (4.6%) and transportation  (4.6%), and we
remain similarly bullish on their prospects.
 
   We believe  that  the  Portfolio represents  an  attractive  opportunity  for
investors  seeking exposure  to smaller U.S.  companies, and  that the long-term
argument for investing in such companies remains a persuasive one. Historically,
smaller companies have demonstrated the potential for explosive earnings growth,
which has often translated  into outsized gains in  their share prices.  Indeed,
over  extended periods,  stocks of smaller  companies in  aggregate have handily
outperformed those of larger-capitalization firms, albeit with an elevated level
of volatility.
 
   We are encouraged by the Portfolio's relative strength over the last  several
months, and look forward to the months ahead.
 
<TABLE>
<S>                                         <C>
Elizabeth B. Dater                          Stephen J. Lurito
Co-Portfolio Manager                        Co-Portfolio Manager
</TABLE>
 
                                       3

<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- INTERNATIONAL EQUITY PORTFOLIO
STATEMENT OF NET ASSETS
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                  NUMBER OF
                                                                   SHARES              VALUE
                                                                 -----------        ------------
<S>                                                              <C>                <C>
COMMON STOCK (93.1%)
Argentina (3.3%)
   Banco de Galicia & Buenos Aires SA                                106,796        $    639,408
   Banco de Galicia & Buenos Aires SA ADR                             11,003             258,571
   Banco Frances del Rio de la Plata SA                              129,030           1,236,301
   Banco Frances del Rio de la Plata SA ADR                          187,105           5,379,269
   Capex SA GDR                                                       58,400             835,996
   Telefonica de Argentina SA ADR                                    263,800           7,716,150
   YPF SA ADR                                                        325,600           7,122,500
                                                                                    ------------
                                                                                      23,188,195
                                                                                    ------------
Australia (2.4%)
   Lend Lease Corp., Ltd.                                            267,100           4,070,258
   Niugini Mining Ltd.                                               353,750             805,825
   Pasminco Ltd.                                                     911,000           1,330,998
   Qantas Airways Ltd.                                             2,236,500           3,970,302
   Reinsurance Australia Corp., Ltd.                               1,788,600           4,622,270
   Woodside Petroleum Ltd.                                           353,500           2,043,682
                                                                                    ------------
                                                                                      16,843,335
                                                                                    ------------
Austria (2.5%)
   Boehler-Uddeholm AG `D'                                            75,220           6,139,696
   Maculan Holdings AG Vorzuege #                                      9,290              43,133
   V.A. Technologie AG                                                83,250          11,062,378
                                                                                    ------------
                                                                                      17,245,207
                                                                                    ------------
Brazil (1.4%)
   Panamerican Beverages, Inc. Class A                               225,600           9,898,200
                                                                                    ------------
Chile (0.1%)
   Enersis SA ADR                                                     21,000             624,750
                                                                                    ------------
China (0.7%)
   Ek Chor China Motorcycle Co., Ltd.                                 10,000             147,500
   Henderson China Holding Ltd. `D'                                  735,000           2,038,235
   Jilin Chemical Industrial Co., Ltd. Class H                     5,656,000           1,133,394
   Jilin Chemical Industrial Co., Ltd. ADR                            72,500           1,413,750
                                                                                    ------------
                                                                                       4,732,879
                                                                                    ------------
Denmark (1.8%)
   International Service System AS Class B                           269,150           7,616,377
   Tele Danmark AS ADR                                               160,100           4,042,525
   Tele Danmark AS Class B                                            16,800             845,480
                                                                                    ------------
                                                                                      12,504,382
                                                                                    ------------
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       4
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- INTERNATIONAL EQUITY PORTFOLIO
STATEMENT OF NET ASSETS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  NUMBER OF
                                                                   SHARES              VALUE
                                                                 -----------        ------------
COMMON STOCK (CONT'D)
<S>                                                              <C>                <C>
Finland (1.6%)
   Metra Oy Class B                                                   60,650        $  2,507,856
   Metsa-Serla Class B                                               574,000           4,189,175
   Valmet Corp. Class A                                              311,500           4,314,940
                                                                                    ------------
                                                                                      11,011,971
                                                                                    ------------
France (5.2%)
   Cetelem                                                            13,458           2,888,788
   Fives-Lille (Compagnie De)                                         26,740           2,825,905
   Lagardere Groupe                                                  304,550           8,175,958
   Scor SA                                                            73,251           2,669,731
   Total Cie Franc Des Petroles Class B                              169,447          11,501,996
   Usinor Sacilor SA `D'                                             556,300           8,608,572
                                                                                    ------------
                                                                                      36,670,950
                                                                                    ------------
Germany (2.6%)
   Adidas AG                                                          95,000           7,173,558
   Adidas AG ADS                                                      42,100           1,599,169
   SGL Carbon AG                                                      97,708           9,126,817
                                                                                    ------------
                                                                                      17,899,544
                                                                                    ------------
Hong Kong (4.5%)
   Citic Pacific Ltd.                                              2,813,000          11,055,617
   Hong Kong Land Holdings Ltd.                                    1,575,000           3,370,500
   Hong Kong Land Holdings Ltd. ADR                                  275,000           2,942,500
   HSBC Holdings PLC                                                 289,925           4,329,197
   Jardine Matheson Holdings Ltd. ADR                              1,223,715           9,789,720
                                                                                    ------------
                                                                                      31,487,534
                                                                                    ------------
India (3.1%)
   Associated Cement Companies Ltd.                                    5,185             609,602
   Bharat Petroleum Corp. Ltd.                                        14,000             148,159
   Hindalco Industries Ltd.                                           56,750           2,147,253
   Hindalco Industries Ltd. GDR                                      137,800           6,097,650
   India Cements Ltd.                                                 20,250              92,472
   Reliance Industries Ltd.                                          693,500           5,237,946
   Reliance Industries Ltd. GDS                                       60,700           1,001,550
   State Bank of India                                               548,350           4,825,289
   The India Fund Inc. `D'                                           144,000           1,602,000
                                                                                    ------------
                                                                                      21,761,921
                                                                                    ------------
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       5
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- INTERNATIONAL EQUITY PORTFOLIO
STATEMENT OF NET ASSETS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  NUMBER OF
                                                                   SHARES              VALUE
                                                                 -----------        ------------
COMMON STOCK (CONT'D)
<S>                                                              <C>                <C>
Indonesia (1.8%)
   P.T. Bank International Indonesia                                 457,350        $  2,249,503
   P.T. Mulia Industrindo                                          1,615,800           3,116,631
   P.T. Semen Gresik                                                 646,000           2,235,941
   P.T. Sinar Mas Multiartha `D'                                     107,000             136,444
   P.T. Telekomunikasi Indonesia                                   2,076,500           3,448,966
   P.T. Telekomunikasi Indonesia ADR                                  26,100             890,663
   P.T. Tri Polyta Indonesia ADR                                      40,500             506,250
                                                                                    ------------
                                                                                      12,584,398
                                                                                    ------------
Israel (1.3%)
   Ampal-American Israel Corp. Class A                               233,000           1,368,875
   ECI Telecommunications Limited Designs                            299,850           7,833,581
                                                                                    ------------
                                                                                       9,202,456
                                                                                    ------------
Japan (27.8%)
   Canon Inc.                                                        470,000           9,338,046
   Canon Inc. ADR                                                     25,200           2,507,400
   Daibiru Corp.                                                     147,000           1,979,845
   Daimaru Inc.                                                      314,000           2,474,448
   DDI Corp.                                                           1,095           9,403,047
   East Japan Railway Co.                                                413           2,205,244
   Fujitsu Ltd.                                                      312,000           3,218,646
   Hankyu Realty                                                     216,000           2,125,131
   Hitachi Ltd.                                                      452,750           4,886,880
   Honda Motor Co.                                                   425,000           9,702,455
   Itochu Corp.                                                      335,000           2,550,339
   Jusco Co., Ltd.                                                   158,000           4,889,865
   Kao Corp.                                                             500               6,686
   Keyence Corp.                                                      30,000           3,954,532
   Kirin Beverage Corp.                                              144,000           2,035,725
   Kyocera Corp.                                                      42,000           3,161,333
   Mitsubishi Corp.                                                  180,000           2,561,849
   Mitsubishi Estate Co., Ltd.                                       428,000           6,009,743
   Mitsubishi Heavy Industries Ltd.                                  994,000           8,868,049
   Murata Mfg. Co., Ltd.                                              70,290           2,725,928
   NEC Corp.                                                         612,000           7,774,955
   Nikko Securities Company Ltd.                                     482,000           6,123,412
   Nikon Corp.                                                       506,000           6,814,978
   Nippon Communication Systems Corp.                                405,300           5,226,430
   Nippon Telephone & Telegraph Corp.                                  1,437          11,131,360
   NKK Corp. `D'                                                   2,635,000           8,255,612
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       6
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- INTERNATIONAL EQUITY PORTFOLIO
STATEMENT OF NET ASSETS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  NUMBER OF
                                                                   SHARES              VALUE
                                                                 -----------        ------------
COMMON STOCK (CONT'D)
<S>                                                              <C>                <C>
Japan (cont'd)
   NTT Data Communications Systems Co.                                   164        $  5,733,499
   Orix Corp.                                                        186,700           7,721,951
   Rohm Co., Ltd.                                                     80,000           5,089,311
   Shin-Etsu Chemical Co., Ltd.                                       73,080           1,598,560
   Sony Corp.                                                        110,500           7,177,381
   Sony Corp. ADR                                                     36,900           2,380,050
   TDK Corp.                                                         169,000           9,669,596
   Toho Co., Ltd.                                                     25,850           4,493,934
   Tokyo Electron Ltd.                                               119,000           4,421,721
   Tsuchiya Home Co.                                                  78,180           1,530,891
   Uny Co., Ltd.                                                     277,500           5,380,886
   Yokogawa Electric                                                 422,000           4,917,757
   York-Benimaru Co., Ltd.                                           107,400           4,308,721
                                                                                    ------------
                                                                                     194,356,196
                                                                                    ------------
Malaysia (0.3%)
   Land & General BHD                                                171,000             456,174
   Westmont Industries BHD                                           353,000             764,682
   Westmont Industries BHD Class A `D'                               494,200           1,030,905
                                                                                    ------------
                                                                                       2,251,761
                                                                                    ------------
Mexico (0.6%)
   Gruma SA de CV Class B                                            982,000           3,970,350
                                                                                    ------------
New Zealand (5.2%)
   Brierley Investments Ltd.                                       8,882,083           8,354,860
   Fletcher Challenge Building `D'                                 1,499,913           3,552,948
   Fletcher Challenge Energy `D'                                     570,513           1,222,147
   Fletcher Challenge Forestry                                     5,220,251           6,738,342
   Fletcher Challenge Paper `D'                                    1,141,025           2,350,283
   Lion Nathan Ltd.                                                3,200,800           7,977,539
   Sky City Ltd. `D'                                                 862,075           3,663,865
   Wrightson Ltd.                                                  3,271,735           2,336,228
                                                                                    ------------
                                                                                      36,196,212
                                                                                    ------------
Norway (0.6%)
   Norsk Hydro AS ADR                                                 98,144           4,514,624
                                                                                    ------------
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       7
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- INTERNATIONAL EQUITY PORTFOLIO
STATEMENT OF NET ASSETS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  NUMBER OF
                                                                   SHARES              VALUE
                                                                 -----------        ------------
COMMON STOCK (CONT'D)
<S>                                                              <C>                <C>
Pakistan (0.2%)
   Pakistan Telecommunications Corp. `D'                                 345        $     34,386
   Pakistan Telecommunications Corp. GDR `D'                          14,400           1,483,200
                                                                                    ------------
                                                                                       1,517,586
                                                                                    ------------
Portugal (0.9%)
   Portugal Telecom SA                                               131,400           2,857,468
   Portugal Telecom SA ADR                                           149,100           3,224,288
                                                                                    ------------
                                                                                       6,081,756
                                                                                    ------------
Singapore (1.6%)
   DBS Land Ltd.                                                   1,097,500           4,451,541
   Development Bank of Singapore Ltd.                                315,562           3,997,014
   Development Bank of Singapore Ltd. ADR                             34,750           1,763,563
   IPC Corp., Ltd.                                                 1,795,000             913,275
                                                                                    ------------
                                                                                      11,125,393
                                                                                    ------------
South Korea (4.9%)
   Daewoo Electronics Co., Ltd.                                      419,450           4,581,502
   Daewoo Heavy Industries                                            78,194             869,157
   Hana Bank                                                         215,051           4,781,306
   Hanil Bank                                                        484,453           6,771,883
   Inchon Iron & Steel Co., Ltd.                                      17,000             552,686
   Korea Europe Fund Ltd.                                                289           1,319,285
   Korea Long Term Credit Bank                                        59,157           1,882,693
   Korea Mobile Telecommunications Corp.                                 500              70,059
   L.G. Construction Ltd.                                             12,530             318,805
   Mando Machinery Corp.                                               6,000             340,524
   Samsung Electronics Co., Ltd.                                      43,017           5,859,431
   Samsung Electronics Co., Ltd. GDR                                  15,347             629,220
   Samsung Electronics Co., Ltd. GDR                                   4,824             365,421
   Samsung Heavy Industries Co., Ltd.                                112,453           2,384,316
   Ssangyong Investment & Securities Co., Ltd. `D'                   141,630           3,366,943
                                                                                    ------------
                                                                                      34,093,231
                                                                                    ------------
Spain (3.5%)
   Banco de Santander                                                 30,300           1,408,914
   Banco de Santander ADR                                            249,000          11,671,875
   Repsol SA ADR                                                     303,500          11,229,500
                                                                                    ------------
                                                                                      24,310,289
                                                                                    ------------
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       8
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- INTERNATIONAL EQUITY PORTFOLIO
STATEMENT OF NET ASSETS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  NUMBER OF
                                                                   SHARES              VALUE
                                                                 -----------        ------------
COMMON STOCK (CONT'D)
<S>                                                              <C>                <C>
Sweden (2.5%)
   Asea AB Series B                                                   59,200        $  6,002,093
   Astra AB Series B                                                 266,100          11,744,492
                                                                                    ------------
                                                                                      17,746,585
                                                                                    ------------
Switzerland (0.9%)
   BBC Brown Boveri AG                                                 3,674           4,428,218
   Danzas Holding AG                                                   1,369           1,571,725
                                                                                    ------------
                                                                                       5,999,943
                                                                                    ------------
Taiwan (4.6%)
   China Steel Corp.                                               7,023,000           6,591,575
   Hocheng Group Corp.                                             1,210,000           2,583,091
   Kwang Hua Growth Fund                                             346,000             128,625
   Phoenixtec Power Co., Ltd. `D'                                  1,280,000           2,732,526
   Taiwan Semiconductor Mfg. Co.                                   1,621,000           6,145,349
   Ton Yi Industrial Corp.                                         4,115,560           5,907,720
   Yang Ming Marine Transport Corp.                                5,588,000           7,980,213
                                                                                    ------------
                                                                                      32,069,099
                                                                                    ------------
Thailand (1.4%)
   Bangkok Bank Public Co., Ltd.                                     170,400           2,476,823
   Industrial Finance Corp. of Thailand                            1,310,832           5,309,963
   Ruam Pattana Fund II                                               86,000              56,354
   Thai Military Bank Ltd.                                           340,560           1,650,052
                                                                                    ------------
                                                                                       9,493,192
                                                                                    ------------
United Kingdom (5.8%)
   AAF Industries PLC `D'                                            208,500              90,915
   British Air Authority PLC                                         852,034           7,007,717
   Cookson Group PLC                                               1,246,700           5,904,795
   Grand Metropolitan PLC                                            992,600           6,522,109
   London Pacific Group Ltd.                                         606,000           2,314,401
   Prudential Corp. PLC                                               81,242             558,861
   Reckitt & Colman PLC                                              473,986           5,188,347
   Rolls-Royce PLC                                                 1,734,000           6,179,164
   Singer & Friedlander Group PLC                                  2,210,000           3,688,481
   Takare PLC                                                      1,222,900           2,758,129
   Trio Holdings PLC `D'                                           1,648,500             173,508
                                                                                    ------------
                                                                                      40,386,427
                                                                                    ------------
Zimbabwe (0.0%)
   Delta Corp. Ltd.                                                   37,000              90,953
                                                                                    ------------
 
TOTAL COMMON STOCK (Cost $564,439,574)                                               649,859,319
                                                                                    ------------
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       9
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- INTERNATIONAL EQUITY PORTFOLIO
STATEMENT OF NET ASSETS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  NUMBER OF
                                                                   SHARES              VALUE
                                                                 -----------        ------------
PREFERRED STOCK (0.3%)
<S>                                                              <C>                <C>
Austria (0.0%)
   Maculan Holdings AG Vorzuege #                                     31,100        $    144,396
                                                                                    ------------
South Korea (0.2%)
   Samsung Electronics Co., Ltd.                                      16,264           1,358,177
                                                                                    ------------
United Kingdom (0.1%)
   Singer & Friedlander Group PLC, 8.50% Convertible                 348,947             682,080
                                                                                    ------------
 
TOTAL PREFERRED STOCK (Cost $3,961,744)                                                2,184,653
                                                                                    ------------
 
STOCK RIGHTS & WARRANTS (0.0%)
Hong Kong (0.0%)
   Jardine Strategic Holdings Ltd. Wts., 05/02/98 `D'                384,600              18,894
                                                                                    ------------
Israel (0.0%)
   Ampal-American Israel Corp. Class A Wts., 01/31/99 `D'             95,000              29,688
                                                                                    ------------
Japan (0.0%)
   Bandai Industries Wts., 11/04/97 `D'                                   60              83,250
                                                                                    ------------
South Korea (0.0%)
   Samsung Heavy Industries Rts., 05/14/96 `D'                        10,907              82,692
                                                                                    ------------
Switzerland (0.0%)
   Danzas Holdings AG Wts., 08/02/96 `D'                               2,000               6,848
                                                                                    ------------
 
TOTAL STOCK RIGHTS & WARRANTS (Cost $409,880)                                            221,372
                                                                                    ------------
 
CALL OPTIONS (0.8%)
Japan (0.4%)
   Topix Index, 05/10/96, (Strike Price $1,323.64) `D'                 3,126           1,215,326
   Topix Index, 06/14/96, (Strike Price $1,275.00) `D'                 3,141           1,357,917
                                                                                    ------------
                                                                                       2,573,243
                                                                                    ------------
Taiwan (0.4%)
   Taiwan Weighted Index, 07/11/96, (Strike Price $183.42)
     `D'                                                              21,193             937,771
   Taiwan Weighted Index, 07/16/96, (Strike Price $184.01)
     `D'                                                              22,136             973,087
   Taiwan Weighted Index, 08/02/96, (Strike Price $174.89)
     `D'                                                              16,984             898,280
                                                                                    ------------
                                                                                       2,809,138
                                                                                    ------------
TOTAL CALL OPTIONS (Cost $1,667,483)                                                   5,382,381
                                                                                    ------------
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       10
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- INTERNATIONAL EQUITY PORTFOLIO
STATEMENT OF NET ASSETS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                    PAR=               VALUE
                                                                 -----------        ------------
CONVERTIBLE BONDS/NOTES (1.4%)
<S>                                                              <C>                <C>
Argentina (0.2%)
   Banco de Galicia & Buenos Aires SA 7.00%, 08/01/02            $ 1,574,000        $  1,652,700
                                                                                    ------------
Japan (0.9%)
   Matsushita Electric Works Ltd. 2.70%, 05/31/02                (A)521,000,000        6,315,303
                                                                                    ------------
New Zealand (0.1%)
   Brierley Investments Ltd. 9.00%, 06/30/98                     (B) 1,028,875           904,225
                                                                                    ------------
Thailand (0.2%)
   Bangkok Bank Public Co., Ltd. 3.25%, 03/03/04                     800,000             988,000
                                                                                    ------------
TOTAL CONVERTIBLE BONDS/NOTES (Cost $8,710,921)                                        9,860,228
                                                                                    ------------
<CAPTION>
 
SHORT-TERM INVESTMENTS (2.0%)
<S>                                                              <C>                <C>
  Repurchase agreement with State Street Bank & Trust Co.
  dated 04/30/96 at 5.24% to be repurchased at $14,104,053
  on 05/01/96. (Collateralized by $14,720,000 U.S. Treasury
  Bill due 10/03/96, with a market value of $14,388,800.)
  (Cost $14,102,000)                                              14,102,000          14,102,000
                                                                                    ------------
TOTAL INVESTMENTS AT VALUE (97.6%) (Cost $593,291,602*)                              681,609,953
OTHER ASSETS IN EXCESS OF LIABILITIES (2.4%)                                          16,950,188
                                                                                    ------------
NET ASSETS (100.0%) (applicable to 41,500,090 shares)                               $698,560,141
                                                                                    ------------
                                                                                    ------------
NET ASSET VALUE, offering and redemption price per share
 ($698,560,141[div]41,500,090 shares)                                                     $16.83
                                                                                          ------
                                                                                          ------
</TABLE>
 
                            INVESTMENT ABBREVIATIONS
 
<TABLE>
<C>       <S>
      ADR = American Depository Receipt
      GDR = Global Depository Receipt
      GDS = Global Depository Share
</TABLE>
 
- --------------------------------------------------------------------------------
 `D' Non-income producing security.
 # Illiquid security.
 * Cost for Federal income tax purposes is $593,470,851.
 
 = Unless otherwise indicated below, all bonds are denominated in U.S. Dollars.
 
(A) Denominated in Japanese Yen.
(B) Denominated in New Zealand Dollars.
 
                See Accompanying Notes to Financial Statements.
                                       11

<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- SMALL COMPANY GROWTH PORTFOLIO
STATEMENT OF NET ASSETS
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                   NUMBER OF
                                                                     SHARES             VALUE
                                                                   ----------        -----------
<S>                                                                <C>               <C>
COMMON STOCK (82.7%)
 Banks and Savings & Loans (0.3%)
   Great Financial Corp.                                                1,100        $    30,112
                                                                                     -----------
 Business Services (11.4%)
   American Management Systems, Inc. `D'                                5,800            154,425
   Catalina Marketing Corp. `D'                                         1,600            124,600
   CDI Corp. `D'                                                        3,300             97,350
   Checkpoint System, Inc. `D'                                          3,300             98,588
   Continuum, Inc. `D'                                                  2,000            114,000
   Copart, Inc. `D'                                                     3,300             89,925
   Daisytek International Corp. `D'                                     3,300            134,475
   Health Payment Review, Inc. `D'                                      3,300            141,900
   Norrell Corp.                                                        3,300            127,875
   Quickresponse Services, Inc. `D'                                     3,300             96,525
                                                                                     -----------
                                                                                       1,179,663
                                                                                     -----------
 Capital Equipment (1.1%)
   Roper Industries, Inc.                                               2,500            116,250
                                                                                     -----------
 Communications & Media (3.1%)
   Central European Media Enterprises Ltd. Class A `D'                  5,100            145,988
   Harte-Hanks Communications, Inc.                                     3,900             92,138
   TCA Cable TV, Inc.                                                   2,700             78,975
                                                                                     -----------
                                                                                         317,101
                                                                                     -----------
 Computers (15.8%)
   Borland International, Inc. `D'                                      4,900             80,238
   Citrix Systems, Inc. `D'                                             3,300            257,400
   Cognex Corp. `D'                                                     5,100            136,425
   FileNet Corp. `D'                                                    2,500            140,000
   Learning Tree International, Inc. `D'                                3,300             82,500
   National Instruments Corp. `D'                                       3,400             83,300
   OrCad, Inc. `D'                                                     10,700            143,112
   Platinum Technology, Inc. `D'                                        5,800             84,825
   Raptor Systems, Inc. `D'                                             4,000            132,000
   Synopsys, Inc. `D'                                                   6,600            272,249
   System Software Associates, Inc.                                     6,600            157,575
   Tecnomatix Technologies, Ltd. `D'                                    3,400             62,050
                                                                                     -----------
                                                                                       1,631,674
                                                                                     -----------
 Consumer Non-Durables (2.0%)
   Central Garden & Pet Co. `D'                                         5,800             61,625
   Nature's Sunshine Products, Inc.                                     5,800            145,000
                                                                                     -----------
                                                                                         206,625
                                                                                     -----------
 Consumer Services (1.8%)
   DeVRY, Inc. `D'                                                      5,100            189,975
                                                                                     -----------
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       12
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- SMALL COMPANY GROWTH PORTFOLIO
STATEMENT OF NET ASSETS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                   NUMBER OF
                                                                     SHARES             VALUE
                                                                   ----------        -----------
COMMON STOCK (CONT'D)
<S>                                                                <C>               <C>
 Electronics (5.4%)
   Burr-Brown Corp. `D'                                                 3,900        $    75,075
   Glenayre Technologies, Inc. `D'                                      2,500            116,250
   Maxim Integrated Products, Inc. `D'                                  3,700            126,725
   Methode Electronics, Inc. Class A                                    6,600            110,550
   ThermoTrex Corp. `D'                                                 2,500            130,937
                                                                                     -----------
                                                                                         559,537
                                                                                     -----------
 Energy (4.5%)
   Brown (Tom), Inc. `D'                                                6,400             99,200
   Flores & Rucks, Inc. `D'                                            12,900            269,288
   Texas Merdian Resources Corp. `D'                                    9,200             96,600
                                                                                     -----------
                                                                                         465,088
                                                                                     -----------
 Environmental Services (2.3%)
   Allied Waste Industries, Inc. `D'                                   12,900            125,775
   Sanifill, Inc. `D'                                                   2,500            108,437
                                                                                     -----------
                                                                                         234,212
                                                                                     -----------
 Financial Services (3.7%)
   Sirrom Capital Corp.                                                 3,300             83,325
   Transactions Systems Architects, Inc. Class A `D'                    2,000            107,000
   United Companies Financial Corp.                                     3,300            105,600
   Vesta Insurance Group, Inc.                                          2,700             86,738
                                                                                     -----------
                                                                                         382,663
                                                                                     -----------
 Healthcare (10.4%)
   American Oncology Resources, Inc. `D'                                2,500            119,375
   Ballard Medical Products                                             3,400             67,575
   Conmed Corp. `D'                                                     4,900            145,775
   EMCare Holdings, Inc. `D'                                            5,800            162,400
   Endosonics Corp. `D'                                                 6,600            114,675
   Equimed, Inc. `D'                                                    3,400             27,625
   IDX Systems Corp. `D'                                                3,300            121,275
   Medcath, Inc. `D'                                                    2,300             89,700
   Physicians Resource Group, Inc. `D'                                  2,700             81,337
   Rexall Sundown, Inc. `D'                                             4,900            139,650
                                                                                     -----------
                                                                                       1,069,387
                                                                                     -----------
 Lodging & Restaurants (1.5%)
   Doubletree Corp. `D'                                                 3,900            125,775
   Renaissance Hotel Group NV `D'                                       1,400             26,600
                                                                                     -----------
                                                                                         152,375
                                                                                     -----------
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       13
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- SMALL COMPANY GROWTH PORTFOLIO
STATEMENT OF NET ASSETS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                   NUMBER OF
                                                                     SHARES             VALUE
                                                                   ----------        -----------
COMMON STOCK (CONT'D)
<S>                                                                <C>               <C>
 Oil Services (5.2%)
   Input/Output, Inc. `D'                                               6,600        $   229,350
   Nabors Industries, Inc. `D'                                          9,700            149,137
   Petroleum Geo Services ADR `D'                                       5,100            161,288
                                                                                     -----------
                                                                                         539,775
                                                                                     -----------
 Pharmaceuticals (4.6%)
   Alpharma Inc. Class A `D'                                            3,900             95,550
   Gilead Sciences, Inc. `D'                                            4,900            149,450
   La Jolla Pharmaceutical Co. `D'                                     16,000            136,000
   Ligand Pharmaceuticals, Inc. Class B `D'                             6,600             96,525
                                                                                     -----------
                                                                                         477,525
                                                                                     -----------
 Real Estate (1.5%)
   NHP, Inc. `D'                                                        7,800            151,125
                                                                                     -----------
 Retail (1.6%)
   Borders Group, Inc. `D'                                              5,100            163,200
                                                                                     -----------
 Telecommunications & Equipment (1.9%)
   Teledata Communications Ltd. `D'                                    16,200            194,400
                                                                                     -----------
 Transportation (4.6%)
   Heartland Express, Inc. `D'                                          6,600            193,050
   Hub Group, Inc. Class A `D'                                          6,600            153,450
   Mark VII, Inc. `D'                                                   6,400            128,400
                                                                                     -----------
                                                                                         474,900
                                                                                     -----------
TOTAL COMMON STOCK (Cost $7,888,106)                                                   8,535,587
                                                                                     -----------
<CAPTION>
 
                                                                      PAR
                                                                   ----------
SHORT-TERM INVESTMENTS (53.1%) +
<S>                                                                <C>               <C>
  Repurchase agreement with State Street Bank & Trust Co. dated
  04/30/96 at 5.24% to be repurchased at $5,479,798 on
  05/01/96. (Collateralized by $5,530,000 U.S. Treasury Note at
  6.00%, due 08/15/97, with a market value of $5,592,213.)
  (Cost $5,479,000)                                                $5,479,000          5,479,000
                                                                                     -----------
TOTAL INVESTMENTS AT VALUE (135.8%) (Cost $13,367,106*)                               14,014,587
LIABILITIES IN EXCESS OF OTHER ASSETS (35.8%) #                                       (3,693,619)
                                                                                     -----------
NET ASSETS (100.0%) (applicable to 825,833 shares)                                   $10,320,968
                                                                                     -----------
                                                                                     -----------
NET ASSET VALUE, offering and redemption price per share
 ($10,320,968[div]825,833)                                                                $12.50
</TABLE>
 
                            INVESTMENT ABBREVIATIONS
 
<TABLE>
<C>       <S>
      ADR = American Depository Receipt
</TABLE>
 
- --------------------------------------------------------------------------------
 `D' Non-income producing security.
 * Also cost for Federal income tax purposes.
 + Consists of $5,000,000 subscription received on 04/29/96.
 # Unsettled security purchases were 36.7% of the Portfolio's net assets.
 
                See Accompanying Notes to Financial Statements.
                                       14

<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC.
STATEMENT OF OPERATIONS
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                    INTERNATIONAL EQUITY PORTFOLIO     SMALL COMPANY GROWTH PORTFOLIO
                                                    ------------------------------     ------------------------------
                                                                                               FOR THE PERIOD
                                                                                             DECEMBER 29, 1995
                                                             FOR THE SIX                      (COMMENCEMENT OF
                                                             MONTHS ENDED                   OPERATIONS) THROUGH
                                                            APRIL 30, 1996                     APRIL 30, 1996
                                                             (UNAUDITED)                        (UNAUDITED)
                                                    ------------------------------     ------------------------------
 
<S>                                                 <C>                                <C>
INVESTMENT INCOME:
   Dividends (net of foreign taxes withheld of
     $893,419)                                               $  5,451,611                         $  1,974
   Interest                                                       591,004                            7,896
                                                               ----------                          -------
 
       Total investment income                                  6,042,615                            9,870
                                                               ----------                          -------
EXPENSES:
   Investment advisory                                          2,345,980                            8,035
   Administrative services                                        602,436                            1,786
   Audit                                                           12,264                            5,942
   Custodian/Sub-custodian                                        247,315                           10,403
   Directors                                                        4,350                            1,672
   Insurance                                                        3,687                              397
   Interest                                                        92,890                                0
   Legal                                                           20,011                           10,889
   Organizational                                                  11,845                           10,967
   Printing                                                         7,049                            5,951
   Registration                                                    54,654                           13,281
   Transfer agent                                                   9,778                           15,872
   Miscellaneous                                                    6,893                            2,974
                                                               ----------                          -------
                                                                3,419,152                           88,169
 
   Less fees waived and expenses reimbursed                      (633,301)                         (78,520)
                                                               ----------                          -------
 
       Total expenses                                           2,785,851                            9,649
                                                               ----------                          -------
 
         Net investment income                                  3,256,764                              221
                                                               ----------                          -------
 
NET REALIZED AND UNREALIZED GAIN FROM
 INVESTMENTS AND FOREIGN CURRENCY RELATED
 ITEMS:
 
   Net realized gain from security transactions                11,462,601                          180,469
   Net realized gain from foreign currency
     related items                                             15,471,951                                0
   Net change in unrealized appreciation from
     investments and
     foreign currency related items                            56,627,008                          647,481
                                                               ----------                          -------
 
         Net realized and unrealized gain from
           investments and
           foreign currency related items                      83,561,560                          827,950
                                                               ----------                          -------
 
         Net increase in net assets resulting
           from operations                                   $ 86,818,324                         $828,171
                                                               ----------                          -------
                                                               ----------                          -------
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       15
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC.
STATEMENTS OF CHANGES IN NET ASSETS
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                 INTERNATIONAL EQUITY PORTFOLIO        SMALL COMPANY GROWTH PORTFOLIO
                                               ----------------------------------      ------------------------------
                                                                                               FOR THE PERIOD
                                                                                             DECEMBER 29, 1995
                                                FOR THE SIX                                   (COMMENCEMENT OF
                                                MONTHS ENDED          FOR THE               OPERATIONS) THROUGH
                                               APRIL 30, 1996        YEAR ENDED                APRIL 30, 1996
                                                (UNAUDITED)       OCTOBER 31, 1995              (UNAUDITED)
                                               --------------     ----------------     ------------------------------
 
<S>                                            <C>                <C>                  <C>
FROM OPERATIONS:
 
   Net investment income                        $  3,256,764        $  4,659,886                $        221
   Net realized gain (loss) from security
     transactions                                 11,462,601          (1,094,116)                    180,469
   Net realized gain from foreign currency
     related items                                15,471,951           3,076,737                           0
   Net change in unrealized appreciation
     from investments and foreign currency
     related items                                56,627,008          (6,017,482)                    647,481
                                               --------------     ----------------                ----------
       Net increase in net assets resulting
         from operations                          86,818,324             625,025                     828,171
                                               --------------     ----------------                ----------
 
FROM DISTRIBUTIONS:
 
   Dividends from net investment income          (17,882,333)         (3,614,605)                          0
   Distributions from capital gains                        0         (11,710,991)                          0
                                               --------------     ----------------                ----------
       Net decrease from distributions           (17,882,333)        (15,325,596)                          0
                                               --------------     ----------------                ----------
 
FROM CAPITAL SHARE TRANSACTIONS:
 
   Proceeds from sale of shares                  143,443,192         253,425,787                   9,491,797
   Reinvested dividends                           13,380,860          13,607,235                           0
   Net asset value of shares redeemed            (34,958,793)        (75,870,772)                          0
                                               --------------     ----------------                ----------
       Net increase in net assets from
         capital share transactions              121,865,259         191,162,250                   9,491,797
                                               --------------     ----------------                ----------
       Net increase in net assets                190,801,250         176,461,679                  10,319,968
 
NET ASSETS:
 
   Beginning of period                           507,758,891         331,297,212                       1,000
                                               --------------     ----------------                ----------
   End of period                                $698,560,141        $507,758,891                $ 10,320,968
                                               --------------     ----------------                ----------
                                               --------------     ----------------                ----------
</TABLE>
 
                See Accompanying Notes to Financial Statements.
                                       16

<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- INTERNATIONAL EQUITY PORTFOLIO
FINANCIAL HIGHLIGHTS
(For a Share of the Portfolio Outstanding Throughout Each Period)
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                FOR THE SIX            FOR THE YEAR ENDED           SEPTEMBER 1, 1992
                                                MONTHS ENDED              OCTOBER 31,               (COMMENCEMENT OF
                                               APRIL 30, 1996     ----------------------------     OPERATIONS) THROUGH
                                                (UNAUDITED)        1995       1994       1993       OCTOBER 31, 1992
                                               --------------     ------     ------     ------     -------------------
<S>                                            <C>                <C>        <C>        <C>        <C>
NET ASSET VALUE, BEGINNING OF PERIOD               $15.10         $16.34     $13.49     $ 9.62           $ 10.00
                                                    -----         ------     ------     ------             -----
   Income from Investment Operations:
   Net Investment Income                              .12            .15        .17        .10               .02
   Net Gain (Loss) from Securities and
     Foreign Currency Related Items (both
     realized and unrealized)                        2.11           (.64)      2.87       3.87              (.40)
                                                    -----         ------     ------     ------             -----
       Total from Investment Operations              2.23           (.49)      3.04       3.97              (.38)
                                                    -----         ------     ------     ------             -----
   Less Distributions:
   Dividends from net investment income              (.50)          (.18)      (.07)      (.10)              .00
   Distributions from capital gains                   .00           (.57)      (.12)       .00               .00
                                                    -----         ------     ------     ------             -----
       Total Distributions                           (.50)          (.75)      (.19)      (.10)              .00
                                                    -----         ------     ------     ------             -----
NET ASSET VALUE, END OF PERIOD                     $16.83         $15.10     $16.34     $13.49           $  9.62
                                                    -----         ------     ------     ------             -----
                                                    -----         ------     ------     ------             -----
Total Return                                        15.20%`D'      (2.83%)    22.62%     41.61%            (3.80%)`D'
 
RATIOS /SUPPLEMENTAL DATA:
Net Assets, End of Period (000s)                 $698,560       $507,759   $331,297   $109,280           $18,613
 
Ratios to average daily net assets:
   Operating expenses                                 .95%*          .95%       .95%       .95%              .95%*
   Net investment income                             1.11%*         1.20%       .59%       .75%             1.22%*
   Decrease reflected in above expense
     ratios due to waivers/reimbursements             .21%*          .23%       .29%       .44%              .85%*
Portfolio Turnover Rate                             17.21%`D'      39.70%     19.34%     19.40%             8.25%`D'
Average Commission Rate #                         $ .0191             --         --         --                --
</TABLE>
 
- --------------------------------------------------------------------------------
`D' Non-Annualized
* Annualized
 
# Computed  by dividing the total amount of commissions paid by the total number
  of shares  purchased  and  sold  during  the period  for  which  there  was  a
  commission charge.
 
                See Accompanying Notes to Financial Statements.
                                       17
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC. -- SMALL COMPANY GROWTH PORTFOLIO
FINANCIAL HIGHLIGHTS
(For a Share of the Portfolio Outstanding Throughout the Period)
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                  DECEMBER 29, 1995
                                                                                  (COMMENCEMENT OF
                                                                                 OPERATIONS) THROUGH
                                                                                   APRIL 30, 1996
                                                                                     (UNAUDITED)
                                                                                 -------------------
<S>                                                                              <C>
NET ASSET VALUE, BEGINNING OF PERIOD                                                   $ 10.00
                                                                                         -----
   Net Investment Income                                                                  0.00
   Net Gain on Securities (both realized and unrealized)                                  2.50
                                                                                         -----
       Total from Investment Operations                                                   2.50
                                                                                         -----
NET ASSET VALUE, END OF PERIOD                                                         $ 12.50
                                                                                         -----
                                                                                         -----
Total Return                                                                             25.00%`D'
 
RATIOS /SUPPLEMENTAL DATA:
Net Assets, End of Period (000s)                                                       $10,321
 
Ratio to average daily net assets:
   Operating expenses                                                                     1.08%*
   Net investment income                                                                  0.02%*
   Decrease reflected in above expense ratios due to waivers/reimbursements               8.79%*
Portfolio Turnover Rate                                                                  40.65%`D'
Average Commission Rate #                                                              $ .0564
</TABLE>
 
- --------------------------------------------------------------------------------
`D' Non-Annualized
* Annualized
 
# Computed  by dividing the total amount of commissions paid by the total number
  of shares  purchased  and  sold  during  the period  for  which  there  was  a
  commission charge.
 
                See Accompanying Notes to Financial Statements.
                                       18
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC.
NOTES TO FINANCIAL STATEMENTS
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
 
1. SIGNIFICANT ACCOUNTING POLICIES
 
   Warburg   Pincus  Institutional  Fund,  Inc.  (the  'Fund')  is  an  open-end
management investment  company and  currently  offers three  managed  investment
funds  (the  'Portfolios'):  International  Equity  Portfolio,  which  commenced
operations on  September  1,  1992,  seeks  long-term  capital  appreciation  by
investing  in equity securities of  principally non-United States issuers; Small
Company Growth Portfolio, which commenced operations on December 29, 1995, seeks
capital growth  by  investing  primarily in  equity  securities  of  small-sized
domestic  companies; and  Global Fixed Income  Portfolio, which as  of April 30,
1996, had not commenced  operations, seeks to  maximize total investment  return
consistent  with  prudent  investment  management  while  preserving  capital by
investing in investment grade fixed income securities of issuers throughout  the
world, including United States issuers.
 
   The  net asset values of the Portfolios  are determined daily as of the close
of regular trading on the New  York Stock Exchange. The Portfolio's  investments
are  valued  at  market value,  which  is  currently determined  using  the last
reported sales price. If no sales are reported, investments are generally valued
at  the  last  reported  mean  price.  In  the  absence  of  market  quotations,
investments  are generally valued  at fair value  as determined by  or under the
direction of the Fund's Board  of Directors. Short-term investments that  mature
in 60 days or less are valued on the basis of amortized cost, which approximates
market value.
 
   The  books  and records  of the  Portfolios are  maintained in  U.S. dollars.
Transactions denominated  in  foreign currencies  are  recorded at  the  current
prevailing  exchange rates.  All assets  and liabilities  denominated in foreign
currencies are translated into U.S. dollar amounts at the current exchange  rate
at  the end of the period. Translation gains or losses resulting from changes in
the exchange rate during the reporting  period and realized gains and losses  on
the  settlement of foreign currency transactions  are reported in the results of
operations for the  current period. The  Fund does not  isolate that portion  of
gains and losses on investments in equity securities which are due to changes in
the foreign exchange rate from that which are due to changes in market prices of
equity  securities.  The  Fund isolates  that  portion  of gains  and  losses on
investments in debt securities which are due to changes in the foreign  exchange
rate from that which are due to changes in market prices of debt securities.
 
   Security  transactions  are accounted  for on  a  trade date  basis. Interest
income is  recorded  on  the  accrual  basis.  Dividends  are  recorded  on  the
ex-dividend  date. The  cost of  investments sold  is determined  by use  of the
specific identification  method  for both  financial  reporting and  income  tax
purposes.
 
   Dividends  from  net  investment  income and  distributions  of  net realized
capital gains, if any,  are declared and paid  annually. However, to the  extent
that a
 
                                       19
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC.
NOTES TO FINANCIAL STATEMENTS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
net  realized capital gain can be reduced by a capital loss carryover, such gain
will not be distributed. Income and capital gain distributions are determined in
accordance with Federal income tax  regulations which may differ from  generally
accepted accounting principles.
 
   No  provision is made for Federal taxes as it is the Fund's intention to have
each portfolio continue to qualify for and elect the tax treatment applicable to
regulated investment  companies under  the Internal  Revenue Code  and make  the
requisite  distributions to its shareholders which will be sufficient to relieve
it from Federal income and excise taxes.
 
   Costs incurred by the Portfolios  in connection with their organization  have
been  deferred and are being amortized over a period of five years from the date
each Portfolio commences  its operations.  Costs incurred by  the Portfolios  in
connection  with the  offering of  its shares have  been deferred  and are being
amortized over a  one year  period from the  date each  Portfolio commences  its
operations.
 
   The  Portfolios may enter  into repurchase agreement  transactions. Under the
terms of  a typical  repurchase agreement,  a Portfolio  acquires an  underlying
security  subject to an obligation of the seller to repurchase. The value of the
underlying security collateral will be maintained at an amount at least equal to
the total amount of the purchase obligation, including interest. The  collateral
is in the Portfolio's possession.
 
   The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect  the  reported amounts  of  assets and  liabilities  at the  date  of the
financial statement and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from these estimates.
 
   The Portfolios have an arrangement with their transfer agent whereby interest
earned on uninvested cash balances was used to offset a portion of the  transfer
agent  expense. For  the period ended  April 30, 1996,  the International Equity
Portfolio and the Small Company  Growth Portfolio had credits or  reimbursements
of $9,778 and $3, respectively under this arrangement.
 
2. INVESTMENT ADVISER, CO-ADMINISTRATORS AND DISTRIBUTOR
 
   Warburg,  Pincus Counsellors, Inc. ('Warburg'),  a wholly owned subsidiary of
Warburg,  Pincus  Counsellors   G.P.  ('Counsellors  G.P.'),   serves  as   each
Portfolio's  investment adviser.  For its investment  advisory services, Warburg
receives the following fees based on each Portfolio's average daily net assets:
 
<TABLE>
<CAPTION>
                    PORTFOLIO                                   ANNUAL RATE
- -------------------------------------------------    ---------------------------------
<S>                                                  <C>
International Equity                                 .80% of average daily net assets
Small Company Growth                                 .90% of average daily net assets
</TABLE>
 
                                       20
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC.
NOTES TO FINANCIAL STATEMENTS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
 
   For the period ended  April 30, 1996, investment  advisory fees, waivers  and
reimbursements were as follows:
 
<TABLE>
<CAPTION>
                                GROSS                          NET             EXPENSE
        PORTFOLIO            ADVISORY FEE      WAIVER      ADVISORY FEE     REIMBURSEMENTS
- -------------------------    ------------     --------     ------------     --------------
<S>                          <C>              <C>          <C>              <C>
International Equity          $2,345,980     ($550,846)     $1,795,134         $      0
Small Company Growth               8,035        (8,035)              0          (69,589)
</TABLE>
 
   Counsellors  Funds  Service,  Inc.  ('CFSI'), a  wholly  owned  subsidiary of
Warburg, and PFPC  Inc. ('PFPC'), an  indirect, wholly owned  subsidiary of  PNC
Bank  Corp.  ('PNC'),  serve  as  each  Portfolio's  co-administrators.  For its
administrative services, CFSI  receives a fee  calculated at an  annual rate  of
 .10% of the Portfolios' average daily net assets. For the period ended April 30,
1996, administrative services fees earned by CFSI were as follows:
 
<TABLE>
<CAPTION>
                      PORTFOLIO                           CO-ADMINISTRATION FEE
- ------------------------------------------------------    ---------------------
<S>                                                       <C>
International Equity                                            $ 293,248
Small Company Growth                                                  893
</TABLE>
 
   For  its administrative services, PFPC currently receives a fee calculated at
an annual rate  of .10% of  the average daily  net assets of  the Small  Company
Growth  Portfolio. For  the International Eqity  Portfolio, PFPC  receives a fee
based on the following fee structure:
 
<TABLE>
<CAPTION>
AVERAGE DAILY NET ASSETS                                        ANNUAL RATE
- -------------------------------------------------    ---------------------------------
<S>                                                  <C>
First $250 million                                   .12% of average daily net assets
Second $250 million                                  .10% of average daily net assets
Third $250 million                                   .08% of average daily net assets
Over $750 million                                    .05% of average daily net assets
</TABLE>
 
   For the period ended April 30,  1996, administrative service fees earned  and
waived by PFPC were as follows:
 
<TABLE>
<CAPTION>
                                                                               NET
         PORTFOLIO             CO-ADMINISTRATION FEE      WAIVER      CO-ADMINISTRATION FEE
- ---------------------------    ---------------------     --------     ---------------------
<S>                            <C>                       <C>          <C>
International Equity                 $ 309,188           $(72,677)          $ 236,511
Small Company Growth                       893               (893)                  0
</TABLE>
 
   Counsellors  Securities  Inc.  ('CSI'),  also a  wholly  owned  subsidiary of
Warburg, acts  as distributor  of each  Portfolio's shares.  No compensation  is
payable by the Portfolios to CSI for its distribution services.
 
3. INVESTMENTS IN SECURITIES
 
   Purchases  and sales of investment securities  for the period ended April 30,
1996 (excluding short-term investments) were as follows:
 
<TABLE>
<CAPTION>
                    PORTFOLIO                         PURCHASES          SALES
- -------------------------------------------------    ------------     -----------
<S>                                                  <C>              <C>
International Equity                                 $209,374,152     $96,947,607
Small Company Growth                                    8,875,710       1,168,073
</TABLE>
 
   At April 30, 1996, the net unrealized appreciation from investments for those
securities having  an  excess of  value  over  cost and  net  depreciation  from
 
                                       21
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC.
NOTES TO FINANCIAL STATEMENTS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
investments  for those securities having an excess  of cost over value (based on
cost for Federal income tax purposes) was as follows:
 
<TABLE>
<CAPTION>
                                        UNREALIZED       UNREALIZED      NET UNREALIZED
             PORTFOLIO                 APPRECIATION     DEPRECIATION      APPRECIATION
- -----------------------------------    ------------     ------------     --------------
<S>                                    <C>              <C>              <C>
International Equity                   $109,564,537     $(21,425,435)     $ 88,139,102
Small Company Growth                        711,031          (63,550)          647,481
</TABLE>
 
4. FORWARD FOREIGN CURRENCY CONTRACTS
 
   The Portfolios may enter into forward currency contracts for the purchase  or
sale of a specific foreign currency at a fixed price on a future date. Risks may
arise  upon  entering  into  these contracts  from  the  potential  inability of
counterparties to  meet the  terms  of their  contracts and  from  unanticipated
movements  in the value of a foreign  currency relative to the U.S. dollar. Each
Portfolio will enter into forward contracts primarily for hedging purposes.  The
forward  currency  contracts are  adjusted  by the  daily  exchange rate  of the
underlying currency and any gains or losses are recorded for financial statement
purposes as unrealized until the contract settlement date.
 
   At April 30, 1996, the International Equity Portfolio had the following  open
forward foreign currency contracts:
 
<TABLE>
<CAPTION>
                                       FOREIGN                                              UNREALIZED
FORWARD CURRENCY    EXPIRATION        CURRENCY           CONTRACT         CONTRACT       FOREIGN EXCHANGE
    CONTRACT           DATE          TO BE SOLD           AMOUNT           VALUE           GAIN/(LOSS)
- ----------------    ----------     ---------------     ------------     ------------     ----------------
<S>                 <C>            <C>                 <C>              <C>              <C>
French Francs        09/24/96         150,665,950      $ 30,034,676     $ 29,366,146        $  668,530
Japanese Yen         03/05/97       3,972,915,600        39,300,000       39,511,723          (211,723)
Japanese Yen         03/05/97       3,398,640,000        33,600,000       33,800,397          (200,397)
Japanese Yen         03/05/97       2,673,850,000        26,500,000       26,592,163           (92,163)
Japanese Yen         03/05/97       1,766,012,500        17,500,000       17,563,473           (63,473)
Japanese Yen         03/05/97         971,424,000         9,600,000        9,661,075           (61,075)
Japanese Yen         03/05/97         202,400,000         2,000,000        2,012,923           (12,923)
Japanese Yen         03/05/97         124,596,500         1,232,409        1,239,146            (6,737)
                                                       ------------     ------------          --------
                                                       $159,767,085     $159,747,046        $   20,039
                                                       ------------     ------------          --------
                                                       ------------     ------------          --------
</TABLE>
 
5. EQUITY SWAP TRANSACTIONS
 
   The International Equity Portfolio (the 'Portfolio') entered into a Taiwanese
equity  swap agreement (which  represents approximately .48%  of the Portfolio's
net assets  at  April 30,  1996)  dated August  11,  1995, where  the  Portfolio
receives  a quarterly payment, representing the  total return (defined as market
appreciation and dividend income) on a  basket of three Taiwanese common  stocks
('Common  Stocks').  In  return, the  Portfolio  pays quarterly  the  Libor rate
(London Interbank Offered Rate), plus 1.25% per annum (6.508% on April 30, 1996)
on the market value of the Common Stocks ('Notional amount') which is  currently
$2,583,878.  The Notional  amount is  marked to  market on  each quarterly reset
date. In the event that the Common  Stocks decline in value, the Portfolio  will
be  required to pay quarterly, the amount  of any depreciation in value from the
notional amount. The equity swap agreement will terminate on August 11, 1996.
 
                                       22
 
<PAGE>
<PAGE>
WARBURG PINCUS INSTITUTIONAL FUND, INC.
NOTES TO FINANCIAL STATEMENTS (CONT'D)
April 30, 1996 (Unaudited)
- --------------------------------------------------------------------------------
 
   During the term of the equity swap  transaction, changes in the value of  the
Common  Stocks as  compared to the  Notional amount is  recognized as unrealized
gain or  loss.  Dividend  income for  the  Common  Stocks are  recorded  on  the
ex-dividend  date. Interest  expense is  accrued daily.  At April  30, 1996, the
Portfolio has recorded an  unrealized gain of $778,199  and interest payable  of
$36,433 on the equity swap transaction.
 
6. CAPITAL SHARE TRANSACTIONS
 
   The  Fund is  authorized to  issue up  to three  billion full  and fractional
shares of common stock of  separate series having a  $.001 par value per  share.
Shares  of three series  have been authorized, which  constitute the interest in
the Portfolios.
 
   Transactions in shares of each Portfolio were as follows:
 
<TABLE>
<CAPTION>
                                            INTERNATIONAL EQUITY             SMALL COMPANY GROWTH
                                                  PORTFOLIO                       PORTFOLIO
                                   ---------------------------------------   --------------------
                                                                                FOR THE PERIOD
                                                                              DECEMBER 29, 1995
                                       FOR THE SIX                             (COMMENCEMENT OF
                                       MONTHS ENDED           FOR THE        OPERATIONS) THROUGH
                                      APRIL 30, 1996         YEAR ENDED         APRIL 30, 1996
                                       (UNAUDITED)        OCTOBER 31, 1995       (UNAUDITED)
                                   --------------------   ----------------   --------------------
<S>                                <C>                    <C>                <C>
Shares sold                              9,188,484           17,573,932             825,733
Shares issued to shareholders on
 reinvestment of dividends                 898,044              939,078                   0
Shares redeemed                         (2,222,462)          (5,146,019)                  0
                                          --------             --------              ------
Net increase in shares
 outstanding                             7,864,066           13,366,991             825,733
                                          --------             --------              ------
                                          --------             --------              ------
</TABLE>
 
7. NET ASSETS
 
   Net assets at April 30, 1996, consisted of the following:
 
<TABLE>
<CAPTION>
                                             INTERNATIONAL EQUITY   SMALL COMPANY GROWTH
                                                  PORTFOLIO              PORTFOLIO
                                             --------------------   --------------------
<S>                                          <C>                    <C>
Capital contributed, net                         $593,483,584           $  9,492,797
Accumulated net investment income                   8,296,436                    221
Accumulated net realized gain from security
 transactions                                       7,624,180                180,469
Net unrealized appreciation from
 investments and foreign currency related
 items                                             89,155,941                647,481
                                                  -----------             ----------
Net assets                                       $698,560,141           $ 10,320,968
                                                  -----------             ----------
                                                  -----------             ----------
</TABLE>
 
                                       23

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<PAGE>
                      [THIS PAGE INTENTIONALLY LEFT BLANK]

<PAGE>
<PAGE>
        Further  information is contained in  the Prospectus, which must
        precede or accompany this report.


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                    P.O. BOX 9030, BOSTON, MA 02205-9030
                         800-WARBURG (800-927-2874)



COUNSELLORS SECURITIES INC., DISTRIBUTOR                            WPINS-3-0496



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