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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSR

   CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

                        Investment Company Act file number   811-7986

                          The Alger Institutional Funds
               (Exact name of registrant as specified in charter)

                    111 Fifth Avenue New York, New York 10003
               (Address of principal executive offices) (Zip code)

                                 Mr. Hal Liebes

                           Fred Alger Management, Inc.

                                111 Fifth Avenue

                            New York, New York 10003
                     (Name and address of agent for service)

Registrant's telephone number, including area code: 212-806-8800

Date of fiscal year end: October 31

Date of reporting period: October 31, 2005




ITEM 1.  REPORT(S) TO STOCKHOLDERS.



                                    THE ALGER
                               INSTITUTIONAL FUNDS


                       ALGER LARGECAP GROWTH INSTITUTIONAL FUND
                       ALGER SMALLCAP GROWTH INSTITUTIONAL FUND
                         ALGER MIDCAP GROWTH INSTITUTIONAL FUND
                  ALGER CAPITAL APPRECIATION INSTITUTIONAL FUND
                              ALGER BALANCED INSTITUTIONAL FUND
           ALGER SOCIALLY RESPONSIBLE GROWTH INSTITUTIONAL FUND






                                  ANNUAL REPORT
                                OCTOBER 31, 2005


                                     [LOGO]




    TABLE OF CONTENTS

    THE ALGER INSTITUTIONAL FUNDS
    Letter to Our Shareholders.............................................   1
    Fund Highlights (Unaudited)............................................   7
    Portfolio Summary (Unaudited)..........................................  13
    Schedules of Investments...............................................  14
    Statements of Assets and Liabilities...................................  40
    Statements of Operations...............................................  42
    Statements of Changes in Net Assets....................................  44
    Financial Highlights...................................................  48
    Notes to Financial Statements..........................................  52
    Report of Independent Registered Public Accounting Firm................  64
    Additional Information (Unaudited).....................................  65







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Dear Shareholders,                                             December 12, 2005


THE YEAR IN REVIEW

      The past 12 months had more than  their  share of  challenges.  Hurricanes
Katrina and Rita  devastated the southern coast,  leaving  hundreds of thousands
jobless and without  homes,  and prompting  investor fears of high energy prices
(which came true) and  inflation  (which did not).  The war in Iraq  entered its
third year, and the domestic  debate about the war  intensified.  The job market
showed  some  improvement  but job  creation  and wage growth  remained  sub-par
relative to economic  growth and  corporate  profitability.  The  Fed--concerned
about  inflation  and the  frothiness  of the housing  market--raised  overnight
lending rates eight times to 3.75%, the highest level in 4.5 years. In response,
anxious  investors--and  Wall  Street  professionals,   in  particular--remained
skeptical, adopting a wait-and-see attitude.

      Despite such understandable concerns, the U.S. equity markets have emerged
from the bear market of the early 2000s.  In fact,  since October of 2002,  when
the market made a post-bubble low, the major U.S. indices have been very strong.
So has the economy, both domestically and globally. Over the past year, the U.S.
economy  showed steady growth of around 3.5%,  core inflation  excluding  energy
remained  muted at around 2%, and corporate  earnings  stayed in  double-digits,
much to the surprise of most  strategists.  Growth  companies in particular  saw
healthy stock appreciation. Going forward, we see even greater potential for the
better growth managers to outperform their benchmarks and the overall markets.

      Challenges for consumers did not  necessarily  translate into problems for
investors.  High energy  prices  created  investment  opportunities,  and energy
stocks  outperformed all other sectors.  Additionally,  high gas prices prompted
exploration into both alternative sources of energy and innovative  solutions to
reducing fuel consumption.

      The twin effects of productivity and globalization continue to reshape the
competitive landscape for dynamic companies.  Information technologies no longer
attract the same attention,  but their effects on companies are more significant
than ever.  The result is higher  productivity,  which  translates  into  higher
profitability for many corporations.  In addition, more businesses are operating
on a global scale, and U.S.  corporate  profits rose  dramatically  from foreign
sales.  Emerging  economies in Asia,  Latin  America and Eastern  Europe are all
contributing to global  economic  growth,  and China,  both as a consumer of raw
materials  and  finished  goods  and  as  a  producer  of  products  for  global
consumption, shows no signs of diminishing.

      Consumers have also been affected by these trends. In the United States, a
critical mass of consumers adopted high-speed broadband technology. As a result,
the  Internet  has  become  more  fully  integrated  into  day-to-day  life as a
ubiquitous   resource   for   retail,   services,   entertainment,    education,
communication,  and business needs.  This has created  opportunities for dynamic
new business models, whether it is




                                                                             -2-


Google in the on-line search and advertising space, eBay and auctions,  or Apple
iPods and downloadable  music files.

      In sum,  for the 12 months  ended  October 31,  2005,  the equity  markets
experienced  modest gains with the Dow gaining 6.4%,  the Nasdaq up 8.1% and the
S&P 500 up 8.7%. While long-term Treasury yields were markedly inconsistent with
the Fed's  overnight  interest rate  increases,  the yield on the U.S.  Treasury
10-year note was 4.57% on October 31, 2005, compared to 4.05% a year earlier.

PORTFOLIO MATTERS

ALGER SMALLCAP GROWTH INSTITUTIONAL FUND

      The Alger SmallCap Growth Institutional Fund gained 24.27% compared to the
Russell 2000 Growth Index which returned 10.90%. Our holdings in the information
technology  sector  represented  an average  weight of 25.50% and  significantly
outperformed the benchmark. Strong contributors included aQuantive, Inc., one of
the industry's most successful families of digital marketing companies; Verifone
Holdings Inc., the global leader in secure electronic payment technologies;  and
SiRF Technology Holdings, Inc. a major provider of wireless technologies. During
the fiscal year, we shifted our IT weightings out of computers,  peripherals and
software, and solidified our weight in internet services.

      Our holdings in the health care sector  accounted for an average weight of
20.61%,  and also  outperformed the benchmark.  Psychiatric  Solutions,  Inc., a
leading provider of behavioral health programs to children and adults, was among
the top performers.  Other top holdings  included  Intuitive  Surgical,  Inc., a
leader in surgical robotics,  and Versicor Inc., a bio-tech company  integrating
biology and genomics.  We were  underweight in the industrial  sector at 12.02%,
compared to the benchmark at 14.34%.  However,  we  significantly  outperformed.
Leading   contributors   included  BE  Aerospace   Inc.,  the  world's   leading
manufacturer of cabin interior  products for commercial  aircraft and Joy Global
Inc., one of the world's leading providers of mining equipment.

      In the  financials  sector,  the  Fund  held a slight  underweight  to the
benchmark,  at 9.28%.  While our  holdings  in this  sector  outperformed,  good
returns from GFI Group Inc. and National  Financial  Partners  Corporation  were
offset by poor  performances  from Universal  American  Financial Corp. and East
West Bancorp Inc. Consumer  discretionary  holdings were underweight compared to
the benchmark and underperformed.

      In a year beset by rising oil costs,  our energy  holdings,  at an average
weight of 7.95%,  outperformed  the benchmark.  Contributors  included  TODCO, a
leading provider of offshore oil and gas drilling services,  and Range Resources
Corp., an independent U.S. oil and gas company.




                                                                             -3-


ALGER MIDCAP GROWTH INSTITUTIONAL FUND

      For the year ended October 31, 2005, the Alger MidCap Growth Institutional
Fund gained 15.97%, compared to the Russell MidCap Growth Index with a return of
15.90%. Our holdings in consumer discretionary,  at an average weight of 22.23%,
were  underweight  but out  performed  the  benchmark.  Netflix  Inc. and Sirius
Satellite  Radio  Inc.,  both  entertainment  and media  distribution  channels,
performed  well.  Toll Brothers  Inc.,  the nation's  leading  builder of luxury
homes, also contributed to the solid  performance.  Over the course of the year,
we minimized our exposure to household durables and increased it in internet and
catalog and specialty retail.

      In the  energy  sector,  we took  advantage  of the rise in fuel  costs by
increasing  our holdings in oil,  gas,  and  consumable  fuels.  Compared to the
benchmark,  the Fund had an overweight at 9.86%, and our holdings  significantly
outperformed.  Strong  performers  included  National  Oilwell  Varco  Inc.  and
Patterson-UTI  Energy, Inc., both prominent oil and gas drilling companies,  and
EOG Resources,  Inc., one of the largest  energy  resource  agencies in the U.S.
Both the materials and  industrials  sectors were also impacted by rising energy
prices  and our  holdings  in these  sectors  outperformed  the  benchmark  with
contributors like Peabody Energy Corporation and Joy Global Inc.

      Information  technology,  at an average weight of 22.97%,  was underweight
compared to the benchmark and  underperformed.  While we saw strong performances
from  Apple  Computer,  Inc.  and the  continued  sales  dominance  of its  iPod
technology,  some  holdings  underperformed,  including  PalmSource  and Brocade
Communications Systems.

      In the health care sector, the Fund, at 16.96%,  was underweight  compared
to the benchmark and underperformed. Detractors included Elan Corp, PLC and IVAX
Corporation,  a  pharmaceutical  company.  The Fund was also  underweight in the
financials sector and underperformed the benchmark.

ALGER LARGECAP GROWTH INSTITUTIONAL FUND

      The Alger LargeCap Growth  Institutional Fund gained 15.65% for the fiscal
year,  solidly  outperforming  the Russell  1000 Growth  Index  return of 8.82%.
Information  technology  represented an average  weight of 21.33%.  Although the
Fund was underweight compared to the benchmark, it substantially outperformed in
this  sector.  Strong  performers  included  Apple  Computer,  Inc. and internet
distribution  channels  Google Inc.  and Yahoo!  Inc.  During the fiscal year we
shifted our weight in this sector from  communications and electronic  equipment
to computers, peripherals, and software.

      At an average weight of 20.22% our holdings in the health care sector were
underweight in comparison to the benchmark, but still significantly outperformed
it. The Fund's  health care  holdings  were buoyed by strong  performances  from
Genentech,  Inc., a biotech firm,  CIGNA  Corporation,  the leading  provider of
medical  insurance,   and  Caremark  Rx,  Inc.,  one  of  the  nation's  largest
pharmaceutical firms.



                                                                             -4-


      In the consumer  discretionary  sector,  the Fund was overweight at 20.61%
compared to the  benchmark,  but  outperformed  with solid  returns from Netflix
Inc.,  Hilton  Hotels  Corp.,  and  MGM  MIRAGE.   While  the  Fund  saw  strong
performances in consumer discretionary,  we reduced our overall holdings in this
sector  over the course of the year.  In the  financials  sector,  the Fund also
outperformed the benchmark.

      Energy  stocks  accounted  for an  average  weight of 10.04% of the Fund's
holdings. Despite strong returns from oil and gas drilling companies,  including
National  Oilwell Varco Inc. and Transocean  Inc., the Fund  underperformed  the
benchmark in this sector.

ALGER BALANCED INSTITUTIONAL FUND

      The Alger Balanced  Institutional  Fund gained 10.05% for the fiscal year,
outperforming  the  Russell  1000  Growth  Index  return of  8.82%.  Information
technology  represented  an  average  weight  of  20.85%  of the  Fund's  equity
holdings,  an underweight compared to the benchmark,  yet the Fund substantially
outperformed in this sector. Strong IT performers included Apple Computer, Inc.,
Google Inc. and Yahoo! Inc.

      At an  average  weight of 20.01% our equity  holdings  in the health  care
sector were underweight in comparison to the benchmark,  but still significantly
outperformed  it.  The  Fund's  health  care  holdings  were  buoyed  by  strong
performances from Genentech, Inc., CIGNA Corporation, and Caremark Rx, Inc.

      In the consumer  discretionary  sector,  the Fund was overweight at 20.04%
compared to the  benchmark,  but  outperformed  with solid  returns from Netflix
Inc., Hilton Hotels Corp. and MGM MIRAGE. While the Fund saw strong performances
in consumer discretionary, we reduced our overall holdings in this sector during
the year. In the financials  sector,  the Fund  substantially  outperformed  the
benchmark.

      Energy  stocks  accounted  for an  average  weight of 10.18% of the Fund's
equity holdings. The Fund underperformed the benchmark in this sector.

      The  fixed  income  portion  of the  portfolio  reflected  a very  subdued
marketplace  this year. As bondholders  endured eight 0.25% rate hikes,  raising
the overnight  target lending rate to 3.75% from 2.00% for the fiscal year ended
October 31, 2005,  the Alger  Balanced  Fund  returned  0.35%.  The fixed income
portion held 8% Cash, 24% Corporates, 38% U.S. Treasuries, and 30% U.S. Agencies
with an average quality rating of Aa2/AA.

ALGER SOCIALLY RESPONSIBLE GROWTH INSTITUTIONAL FUND

      The Alger Socially Responsible Growth Institutional Fund gained 19.78% for
the year ended October 31, 2005,  substantially  outperforming  the Russell 3000
Growth Index return of 8.99%.

      Information  technology  represented  an  average  weight of 27.78% of the
Fund's holdings,  outperforming the benchmark. Strong performers included Google
Inc., Palm



                                                                             -5-


Inc.,  and Verifone  Holdings Inc.  Throughout the year we shifted our weight in
this sector from software to internet services.

      Slightly  underweight  to the  benchmark,  at 20.53%,  our holdings in the
health care  sector  also  significantly  outperformed.  The Fund's  health care
holdings were buoyed by strong  performances  from Genentech,  Inc.,  PacifiCare
Health  Systems Inc., and Kinetic  Concepts Inc., a provider of patient  therapy
and equipment.

      At an average weight of 7.55%, the Fund was overweight to the benchmark in
the energy sector,  but  outperformed.  Strong  returns in this sector  included
National  Oilwell  Varco  Inc.,  Lone Star  Technologies,  Inc.,  a provider  of
pipeline and tubing for the oil and gas industries, and Talisman Energy Inc. The
materials and  industrials  sectors also benefited from high energy prices,  and
the Fund saw solid returns from Peabody Energy Corporation,  Burlington Northern
Santa Fe Corporation, and Uti Worldwide Inc.

      In the consumer  discretionary  sector, the Fund was underweight at 10.56%
compared to the  benchmark,  but  outperformed  with holdings  including  Sirius
Satellite  Radio Inc.,  eBay Inc., and Abercrombie & Fitch Co. The Fund was also
underweight in consumer  staples,  at 7.27%, but outperformed  with solid fiscal
year-end performances by CVS Corporation, Wal-Mart Stores Inc., and Gillette. As
we observed continued strong  performances in consumer staples, we increased our
holdings in this sector, and decreased in consumer discretionary.

ALGER CAPITAL APPRECIATION INSTITUTIONAL FUND

      The Alger Capital  Appreciation  Institutional  Fund gained 20.18% for the
fiscal year, substantially outperforming the Russell 3000 Growth Index return of
8.99%.  Information  technology  represented  an average weight of 27.32% of the
Fund's  holdings,  and  considerably  outperformed  the  benchmark.   Strong  IT
performers   included  Google  Inc.,  Palm  Inc.,  and  Verifone  Holdings  Inc.
Throughout  the year we  shifted  our weight in this  sector  from  software  to
internet services.

      At an average weight of 23.63% our holdings in the health care sector also
significantly  outperformed the benchmark.  The Fund's industrial  holdings also
performed well, at an average weight of 9.89%.  Strong  performers  included Uti
Worldwide, Inc. and the Burlington Northern Santa Fe Corporation railway.

      In the consumer  discretionary  sector, the Fund was underweight at 11.26%
compared to the benchmark,  but outperformed with a strong, early performance by
eBay Inc. and Sirius  Satellite  Radio Inc. At an average  weight of 6.22%,  the
Fund was markedly underweight in consumer staples. Poor performances by Wal-Mart
Stores,  Inc.  and Avon  Products,  Inc.  were  offset  by strong  returns  from
contributors  like CVS  Corporation  and  Gillette.  As we  continued to observe
similar  strong  performances,  we increased our holdings in this sector by year
end.



                                                                             -6-


      Energy stocks  accounted for an average weight of 6.05%, and rising energy
prices saw strong  returns in this sector.  The materials  sector also exploited
high energy prices.  While the Fund held only a minor average weight of 3.03% in
this sector, the Fund markedly  outperformed the benchmark,  with strong returns
from Peabody Energy Corporation.

LOOKING AHEAD

      At Alger, we look for dynamic,  innovative companies regardless of whether
the stock markets are dominated by bulls or bears. Our long-term  success is not
a  product  of  momentum  or  fads,  but that of a  highly-disciplined  approach
grounded in  fundamental,  bottom-up  research,  and  bolstered  by the thorough
conviction of our analysts.  Looking ahead in 2006, we anticipate a year similar
to 2005, with continued  strong  corporate  earnings,  and an equity market that
increasingly recognizes growth and responds in kind.

      As we end another fiscal year,  we'd like to take the opportunity to thank
you for  growing  with us, and  continuing  to  entrust us with your  investment
needs.

      Respectfully submitted,

      /s/ Daniel C. Chung

      Daniel C. Chung
      CHIEF INVESTMENT OFFICER







IMPORTANT PERFORMANCE AND OTHER INFORMATION

      The views of the funds' management and the portfolio holdings described in
this report are as of October 31, 2005;  these views and portfolio  holdings may
have  changed  subsequent  to this  date and they do not  guarantee  the  future
performance  of the  markets or the Fund.  Information  provided  in this report
should not be considered a recommendation to purchase or sell securities.

A WORD ABOUT RISK

      For a more detailed discussion of the risks associated with a Fund, please
see the Funds' Prospectus.

PERFORMANCE

      PERFORMANCE  DATA  QUOTED  IS  HISTORICAL.  PAST  PERFORMANCE  IS  NOT  AN
INDICATION  OR A GUARANTEE OF FUTURE  RESULTS.  INVESTMENT  RETURN AND PRINCIPAL
VALUE  OF AN  INVESTMENT  WILL  FLUCTUATE  SO THAT AN  INVESTOR'S  SHARES,  WHEN
REDEEMED,  MAY  BE  WORTH  MORE  OR  LESS  THAN  THEIR  ORIGINAL  COST.  CURRENT
PERFORMANCE MAY BE HIGHER OR LOWER THAN THE PERFORMANCE QUOTED.

      Investors  should  consider  the Funds'  investment  objective,  risks and
charges and expenses carefully before investing.  The Funds' prospectus contains
this and other  information  about the Fund,  and may be obtained by asking your
financial   advisor,   calling   (800)   992-5437,   visiting   our  website  at
www.alger.com,  or  contacting  the  Funds'  distributor,  Fred Alger & Company,
Incorporated,  30 Montgomery  Street,  Jersey City,  New Jersey 07302.  Read the
prospectus carefully before investing.




                                                                             -7-


- --------------------------------------------------------------------------------
  ALGER LARGECAP GROWTH INSTITUTIONAL FUND
  FUND HIGHLIGHTS THROUGH OCTOBER 31, 2005
  (UNAUDITED)
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
  $10,000 HYPOTHETICAL INVESTMENT IN CLASS I SHARES--10 YEARS ENDED 10/31/05
- --------------------------------------------------------------------------------


       [The following table represents a line chart in the printed piece.]

              Alger              Russell
              LargeCap           1000
              Growth             Growth
              Institutional I    Index
              ---------------    -------
11/1/95       10000              10000
10/31/96      10819              12205
10/31/97      13939              15922
10/31/98      17482              19845
10/31/99      24824              26641
10/31/00      27374              29126
10/31/01      19839              17495
10/31/02      14841              14063
10/31/03      18270              17130
10/31/04      18526              17711
10/31/05      21426              19273

   The chart above  illustrates  the growth in value of a  hypothetical  $10,000
   investment made in the Alger LargeCap Growth Institutional Class I shares and
   the Russell 1000 Growth Index for the ten years ended  October 31, 2005.  The
   figures for the Alger LargeCap  Growth  Institutional  Class I shares and the
   Russell  1000 Growth  Index (an  unmanaged  index of common  stocks)  include
   reinvestment  of  dividends.   Performance  for  the  Alger  LargeCap  Growth
   Institutional  Class R shares may vary from the  results  shown  above due to
   differences in expenses the class bears.

- --------------------------------------------------------------------------------
  PERFORMANCE COMPARISON AS OF OCTOBER 31, 2005
- --------------------------------------------------------------------------------

                                           AVERAGE ANNUAL RETURNS

                               1 YEAR    5 YEARS   10 YEARS     SINCE INCEPTION
                             ---------------------------------------------------
Class I (INCEPTION 11/8/93)      15.65%    (4.78%)   7.92%           9.75%
Russell 1000 Growth Index         8.82%     7.93%    6.78%           8.40%
- --------------------------------------------------------------------------------
Class R (INCEPTION 1/27/03)      15.15%       --       --           16.52%
Russell 1000 Growth Index         8.82%       --       --           13.70%
- --------------------------------------------------------------------------------

THE FUND'S  AVERAGE  ANNUAL  TOTAL  RETURNS  INCLUDE  CHANGES IN SHARE PRICE AND
REINVESTMENT  OF DIVIDENDS AND CAPITAL  GAINS.  THE GRAPH AND TABLE ABOVE DO NOT
REFLECT  THE  DEDUCTION  OF TAXES  THAT A  SHAREHOLDER  WOULD  HAVE PAID ON FUND
DISTRIBUTIONS  OR ON THE  REDEMPTION  OF  FUND  SHARES.  INVESTMENT  RETURN  AND
PRINCIPAL WILL FLUCTUATE AND THE FUND'S SHARES, WHEN REDEEMED, MAY BE WORTH MORE
OR LESS THAN THEIR ORIGINAL COST.  PAST  PERFORMANCE  DOES NOT GUARANTEE  FUTURE
RESULTS.



                                                                             -8-


- --------------------------------------------------------------------------------
  ALGER SMALLCAP GROWTH INSTITUTIONAL FUND
  FUND HIGHLIGHTS THROUGH OCTOBER 31, 2005
  (UNAUDITED)
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
  $10,000 HYPOTHETICAL INVESTMENT IN CLASS I SHARES--10 YEARS ENDED 10/31/05
- --------------------------------------------------------------------------------

       [The following table represents a line chart in the printed piece.]

              Alger              Russell
              SmallCap           2000
              Growth             Growth
              Institutional I    Index
              ---------------    -------
11/1/95       10000              10000
10/31/96      10920              11332
10/31/97      12994              13732
10/31/98      12763              11555
10/31/99      19493              14940
10/31/00      21453              17354
10/31/01      12044              11886
10/31/02       9897               9323
10/31/03      13623              13661
10/31/04      14498              14417
10/31/05      18016              15989

   The chart above  illustrates  the growth in value of a  hypothetical  $10,000
   investment made in the Alger SmallCap Growth Institutional Class I shares and
   the Russell 2000 Growth Index for the ten years ended  October 31, 2005.  The
   figures for the Alger SmallCap  Growth  Institutional  Class I shares and the
   Russell  2000 Growth  Index (an  unmanaged  index of common  stocks)  include
   reinvestment  of  dividends.   Performance  for  the  Alger  SmallCap  Growth
   Institutional  Class R shares may vary from the  results  shown  above due to
   differences in expenses the class bears.

- --------------------------------------------------------------------------------
  PERFORMANCE COMPARISON AS OF OCTOBER 31, 2005
- --------------------------------------------------------------------------------

                                             AVERAGE ANNUAL RETURNS

                                 1 YEAR    5 YEARS   10 YEARS   SINCE INCEPTION
                              --------------------------------------------------
Class I (INCEPTION 11/8/93)      24.27%    (3.43%)     6.06%          10.31%
Russell 2000 Growth Index        10.90%    (1.63%)     4.80%           5.63%
- --------------------------------------------------------------------------------
Class R (INCEPTION 1/27/03)      23.92%       --         --           24.71%
Russell 2000 Growth Index        10.90%       --         --           21.58%
- --------------------------------------------------------------------------------

THE FUND'S  AVERAGE  ANNUAL  TOTAL  RETURNS  INCLUDE  CHANGES IN SHARE PRICE AND
REINVESTMENT  OF DIVIDENDS AND CAPITAL  GAINS.  THE GRAPH AND TABLE ABOVE DO NOT
REFLECT  THE  DEDUCTION  OF TAXES  THAT A  SHAREHOLDER  WOULD  HAVE PAID ON FUND
DISTRIBUTIONS  OR ON THE  REDEMPTION  OF  FUND  SHARES.  INVESTMENT  RETURN  AND
PRINCIPAL WILL FLUCTUATE AND THE FUND'S SHARES, WHEN REDEEMED, MAY BE WORTH MORE
OR LESS THAN THEIR ORIGINAL COST.  PAST  PERFORMANCE  DOES NOT GUARANTEE  FUTURE
RESULTS.




                                                                             -9-


- --------------------------------------------------------------------------------
  ALGER MIDCAP GROWTH INSTITUTIONAL FUND
  FUND HIGHLIGHTS THROUGH OCTOBER 31, 2005
  (UNAUDITED)
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
  $10,000 HYPOTHETICAL INVESTMENT IN CLASS I SHARES--10 YEARS ENDED 10/31/05
- --------------------------------------------------------------------------------

       [The following table represents a line chart in the printed piece.]

              Alger              Russell
              MidCap             Midcap
              Growth             Growth
              Institutional I    Index
              ---------------    -------
11/1/95       10000              10000
10/31/96      10624              11796
10/31/97      13660              14698
10/31/98      15231              15054
10/31/99      21687              20727
10/31/00      32809              28741
10/31/01      26068              16445
10/31/02      21027              13548
10/31/03      28882              18873
10/31/04      30055              20529
10/31/05      34853              23792

   The chart above  illustrates  the growth in value of a  hypothetical  $10,000
   investment made in the Alger MidCap Growth  Institutional  Class I shares and
   the Russell  Midcap  Growth  Index for the ten years ended  October 31, 2005.
   Figures  for the Alger  MidCap  Growth  Institutional  Class I shares and the
   Russell  Midcap Growth Index (an unmanaged  index of common  stocks)  include
   reinvestment   of  dividends.   Performance   for  the  Alger  MidCap  Growth
   Institutional  Class R shares may vary from the  results  shown  above due to
   differences in expenses the class bears.

- --------------------------------------------------------------------------------
  PERFORMANCE COMPARISON AS OF OCTOBER 31, 2005
- --------------------------------------------------------------------------------

                                            AVERAGE ANNUAL RETURNS

                                1 YEAR    5 YEARS   10 YEARS   SINCE INCEPTION
                              --------------------------------------------------
Class I (INCEPTION 11/8/93)       15.97%   1.22%     13.30%        16.54%
Russell Midcap Growth Index       15.90%  (3.71%)     9.05%         9.74%
- --------------------------------------------------------------------------------
Class R (INCEPTION 1/27/03)       15.37%     --         --         21.59%
Russell Midcap Growth Index       15.90%     --         --         22.41%
- --------------------------------------------------------------------------------

THE FUND'S  AVERAGE  ANNUAL  TOTAL  RETURNS  INCLUDE  CHANGES IN SHARE PRICE AND
REINVESTMENT  OF DIVIDENDS AND CAPITAL  GAINS.  THE GRAPH AND TABLE ABOVE DO NOT
REFLECT  THE  DEDUCTION  OF TAXES  THAT A  SHAREHOLDER  WOULD  HAVE PAID ON FUND
DISTRIBUTIONS  OR ON THE  REDEMPTION  OF  FUND  SHARES.  INVESTMENT  RETURN  AND
PRINCIPAL WILL FLUCTUATE AND THE FUND'S SHARES, WHEN REDEEMED, MAY BE WORTH MORE
OR LESS THAN THEIR ORIGINAL COST.  PAST  PERFORMANCE  DOES NOT GUARANTEE  FUTURE
RESULTS.




                                                                            -10-


- --------------------------------------------------------------------------------
  ALGER CAPITAL APPRECIATION INSTITUTIONAL FUND
  FUND HIGHLIGHTS THROUGH OCTOBER 31, 2005
  (UNAUDITED)
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
  $10,000 HYPOTHETICAL INVESTMENT IN CLASS I SHARES--10 YEARS ENDED 10/31/05
- --------------------------------------------------------------------------------

       [The following table represents a line chart in the printed piece.]

              Alger              Russell
              Capital            3000
              Appreciation       Growth
              Institutional I    Index
              ---------------    -------
11/1/95       10000              10000
10/31/96      10611              12114
10/31/97      13377              15705
10/31/98      17138              18907
10/31/99      31592              25316
10/31/00      35744              27798
10/31/01      23087              16861
10/31/02      17760              13532
10/31/03      21899              16691
10/31/04      21879              17279
10/31/05      26294              18832

   The chart above  illustrates  the growth in value of a  hypothetical  $10,000
   investment  made in the  Alger  Capital  Appreciation  Institutional  Class I
   shares and the Russell 3000 Growth Index for the ten years ended  October 31,
   2005. Figures for the Alger Capital Appreciation Institutional Class I shares
   and the  Russell  3000 Growth  Index (an  unmanaged  index of common  stocks)
   include  reinvestment  of  dividends.   Performance  for  the  Alger  Capital
   Appreciation  Institutional  Class R shares may vary from the  results  shown
   above due to differences in expenses the class bears.

- --------------------------------------------------------------------------------
  PERFORMANCE COMPARISON AS OF OCTOBER 31, 2005
- --------------------------------------------------------------------------------

                                               AVERAGE ANNUAL RETURNS

                                    1 YEAR   5 YEARS   10 YEARS  SINCE INCEPTION
                                  ----------------------------------------------
Class I shares (INCEPTION 11/8/93)  20.18%    (5.96%)    10.15%        12.48%
Russell 3000 Growth Index            8.99%    (7.49%)     6.53%         8.09%
- --------------------------------------------------------------------------------
Class R shares (INCEPTION 1/27/03)  19.54%       --         --         17.61%
Russell 3000 Growth Index            8.99%       --         --         14.23%
- --------------------------------------------------------------------------------

THE FUND'S  AVERAGE  ANNUAL  TOTAL  RETURNS  INCLUDE  CHANGES IN SHARE PRICE AND
REINVESTMENT  OF DIVIDENDS AND CAPITAL  GAINS.  THE GRAPH AND TABLE ABOVE DO NOT
REFLECT  THE  DEDUCTION  OF TAXES  THAT A  SHAREHOLDER  WOULD  HAVE PAID ON FUND
DISTRIBUTIONS  OR ON THE  REDEMPTION  OF  FUND  SHARES.  INVESTMENT  RETURN  AND
PRINCIPAL WILL FLUCTUATE AND THE FUND'S SHARES, WHEN REDEEMED, MAY BE WORTH MORE
OR LESS THAN THEIR ORIGINAL COST.  PAST  PERFORMANCE  DOES NOT GUARANTEE  FUTURE
RESULTS.



                                                                            -11-


- --------------------------------------------------------------------------------
  ALGER BALANCED INSTITUTIONAL FUND
  FUND HIGHLIGHTS THROUGH OCTOBER 31, 2005
  (UNAUDITED)
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
  $10,000 HYPOTHETICAL INVESTMENT SINCE INCEPTION DECEMBER 4, 2000
- --------------------------------------------------------------------------------

       [The following table represents a line chart in the printed piece.]

                                 Russell         Lehman
              Alger              1000            Gov't/Credit
              Balanced           Growth          Bond
              Institutional I    Index           Index
              ---------------    -------         ------------
12/4/00       10000              10000           10000
10/31/01       8200              11139            7067
10/31/02       6670              11749            5680
10/31/03       7410              12475            6919
10/31/04       7504              13172            7154
10/31/05       8258              13280            7785

   The chart above  illustrates  the change in value of a  hypothetical  $10,000
   investment  made in the Alger  Balanced  Institutional  Class I  shares,  the
   Russell 1000 Growth Index and the Lehman  Gov't/Credit Bond Index on December
   4, 2000,  the  inception  date of the Alger  Balanced  Institutional  Class I
   shares,   through   October  31,  2005.   Figures  for  the  Alger   Balanced
   Institutional  Class I shares,  the Russell 1000 Growth  Index (an  unmanaged
   index of common stocks) and the Lehman  Gov't/Credit Bond Index (an unmanaged
   index of government and corporate  bonds) include  reinvestment  of dividends
   and/or  interest.  Performance for the Alger Balanced  Institutional  Class R
   shares may vary from the results shown above due to  differences  in expenses
   the class bears.

- --------------------------------------------------------------------------------
  PERFORMANCE COMPARISON AS OF OCTOBER 31, 2005
- --------------------------------------------------------------------------------

                                                AVERAGE ANNUAL RETURNS

                                             1 YEAR       SINCE INCEPTION
                                          --------------------------------------
Class I shares (INCEPTION 12/4/00)           10.05%           (3.82%)
Russell 1000 Growth Index                     8.82%           (4.97%)
Lehman Gov't/Credit Bond Index                0.82%            5.95%
- --------------------------------------------------------------------------------
Class R shares (INCEPTION 1/27/03)            9.56%            8.91%
Russell 1000 Growth Index                     8.82%           13.70%
Lehman Gov't/Credit Bond Index                0.82%            3.57%
- --------------------------------------------------------------------------------

THE FUND'S  AVERAGE  ANNUAL  TOTAL  RETURNS  INCLUDE  CHANGES IN SHARE PRICE AND
REINVESTMENT  OF DIVIDENDS AND CAPITAL  GAINS.  THE GRAPH AND TABLE ABOVE DO NOT
REFLECT  THE  DEDUCTION  OF TAXES  THAT A  SHAREHOLDER  WOULD  HAVE  PAID ON THE
REDEMPTION OF FUND SHARES.  INVESTMENT  RETURN AND PRINCIPAL  WILL FLUCTUATE AND
THE FUND'S SHARES, WHEN REDEEMED,  MAY BE WORTH MORE OR LESS THAN THEIR ORIGINAL
COST. PAST PERFORMANCE DOES NOT GUARANTEE FUTURE RESULTS.



                                                                            -12-


- --------------------------------------------------------------------------------
  ALGER SOCIALLY RESPONSIBLE GROWTH INSTITUTIONAL FUND
  FUND HIGHLIGHTS THROUGH OCTOBER 31, 2005
  (UNAUDITED)
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
  $10,000 HYPOTHETICAL INVESTMENT SINCE INCEPTION DECEMBER 4, 2000
- --------------------------------------------------------------------------------

       [The following table represents a line chart in the printed piece.]

              Alger                  Russell
              Socially               3000
              Responsible Growth     Growth
              Institutional I        Index
              ---------------        -------
12/4/00       10000                  10000
10/31/01       6370                   7305
10/31/02       4430                   5863
10/31/03       5380                   7232
10/31/04       5396                   7487
10/31/05       6463                   8159

   The chart above  illustrates  the change in value of a  hypothetical  $10,000
   investment made in the Alger Socially  Responsible Growth Institutional Class
   I shares and the Russell 3000 Growth Index on December 4, 2000, the inception
   date of the Alger Socially  Responsible Growth  Institutional Class I shares,
   through October 31, 2005.  Figures for the Alger Socially  Responsible Growth
   Institutional  Class I shares and the Russell 3000 Growth Index (an unmanaged
   index of common stocks) include  reinvestment  of dividends.  Performance for
   the Alger Socially  Responsible Growth  Institutional Class R shares may vary
   from the results shown above due to differences in expenses the class bears.

- --------------------------------------------------------------------------------
  PERFORMANCE COMPARISON AS OF OCTOBER 31, 2005
- --------------------------------------------------------------------------------

                                               AVERAGE ANNUAL RETURNS

                                             1 YEAR       SINCE INCEPTION
                                      ------------------------------------------
Class I (INCEPTION 12/4/00)                  19.78%           (8.50%)
Russell 3000 Growth Index                     8.99%           (4.06%)
- --------------------------------------------------------------------------------
Class R (INCEPTION 1/27/03)                  18.93%           17.05%
Russell 3000 Growth Index                     8.99%           14.23%
- --------------------------------------------------------------------------------

THE FUND'S  AVERAGE  ANNUAL  TOTAL  RETURNS  INCLUDE  CHANGES IN SHARE PRICE AND
REINVESTMENT  OF DIVIDENDS AND CAPITAL  GAINS.  THE GRAPH AND TABLE ABOVE DO NOT
REFLECT  THE  DEDUCTION  OF TAXES  THAT A  SHAREHOLDER  WOULD  HAVE  PAID ON THE
REDEMPTION OF FUND SHARES.  INVESTMENT  RETURN AND PRINCIPAL  WILL FLUCTUATE AND
THE FUND'S SHARES, WHEN REDEEMED,  MAY BE WORTH MORE OR LESS THAN THEIR ORIGINAL
COST. PAST PERFORMANCE DOES NOT GUARANTEE FUTURE RESULTS.




                                                                            -13-


PORTFOLIO SUMMARY* (UNAUDITED)



                                                                                                      SOCIALLY
                                  LARGECAP         SMALLCAP         MIDCAP          CAPITAL          RESPONSIBLE
                                   GROWTH           GROWTH          GROWTH        APPRECIATION         GROWTH
                               INSTITUTIONAL    INSTITUTIONAL    INSTITUTIONAL    INSTITUTIONAL    INSTITUTIONAL
SECTORS                             FUND             FUND            FUND             FUND              FUND
- -------                        -------------    -------------    -------------    -------------    -------------
                                                                                        
Consumer Discretionary .......     15.0%            11.8%           15.3%            10.6%             11.5%
Consumer Staples .............      2.7              0.8             --               9.1               8.4
Energy .......................     14.6              7.6            15.5              8.8              10.7
Financials ...................      9.0              8.4             6.3              3.7               3.7
Health Care ..................     21.7             21.4            20.2             21.8              20.0
Industrials ..................      3.6             13.7             7.7             10.2               6.6
Information Technology .......     27.4             23.4            23.2             27.0              28.0
Materials ....................      1.0              2.0             2.4              1.5               1.5
Telecommunication Services ...      2.1              2.9             3.8              4.6               5.1
Cash and Net Other Assets ....      2.9              8.0             5.6              2.7               4.5
                                  ------           ------          ------           ------            ------
                                  100.0%           100.0%          100.0%           100.0%            100.0%
                                  ======           ======          ======           ======            ======



                                                                    BALANCED
                                                                  INSTITUTIONAL
SECTORS/SECURITY TYPE                                                 FUND
- ---------------------                                             -------------
Consumer Discretionary ........................................       10.8%
Consumer Staples ..............................................        1.8
Energy ........................................................        9.4
Financials ....................................................        5.9
Health Care ...................................................       14.3
Industrials ...................................................        2.3
Information Technology ........................................       17.9
Materials .....................................................        0.6
Telecommunication Services ....................................        1.2
                                                                    -------
  Total Common Stocks .........................................       64.2%
                                                                    -------

Corporate Bonds ...............................................        8.3%
Agency Bonds ..................................................       10.1
US Treasury Bonds .............................................       13.0
                                                                    -------
  Total Bonds .................................................       31.4%
                                                                    -------

Cash and Net Other Assets .....................................        4.4%
                                                                    -------
                                                                     100.0%
                                                                    =======

- ----------
*    Based on Net Assets



                                                                            -14-
THE ALGER INSTITUTIONAL FUNDS
ALGER LARGECAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS
October 31, 2005

    SHARES     COMMON STOCKS--97.1%                                      VALUE
   ---------                                                            --------
               AEROSPACE & DEFENSE--2.2%
      17,450   General Dynamics Corporation ....................     $ 2,029,435
                                                                     -----------
               BIOTECHNOLOGY--5.6%
      23,150   Amgen Inc.* .....................................       1,753,844
      16,900   Genentech, Inc.* ................................       1,531,140
      18,600   Gilead Sciences, Inc.* ..........................         878,850
      27,200   MedImmune, Inc.* ................................         951,456
                                                                     -----------
                                                                       5,115,290
                                                                     -----------
               CAPITAL MARKETS--3.2%
      15,000   Legg Mason, Inc. ................................       1,609,650
      19,600   Merrill Lynch & Co., Inc. .......................       1,268,904
                                                                     -----------
                                                                       2,878,554
                                                                     -----------
               CHEMICALS--1.0%
      32,300   Lyondell  Chemical Company ......................         865,640
                                                                     -----------
               COMMUNICATION EQUIPMENT--7.3%
      50,100   Corning Incorporated* ...........................       1,006,509
      89,100   Motorola, Inc. ..................................       1,974,456
      42,100   QUALCOMM Inc. ...................................       1,673,896
      31,250   Research In Motion Limited* .....................       1,921,563
                                                                     -----------
                                                                       6,576,424
                                                                     -----------
               COMMUNICATION TECHNOLOGY--1.0%
      36,950   Nextel Partners, Inc. Cl. A* ....................         929,292
                                                                     -----------
               COMPUTERS & PERIPHERALS--4.6%
      56,000   Apple Computer, Inc.* ...........................       3,225,040
      34,050   Network Appliance, Inc.* ........................         931,608
                                                                     -----------
                                                                       4,156,648
                                                                     -----------
               DIVERSIFIED FINANCIAL SERVICES--2.4%
      16,900   Citigroup Inc. ..................................         773,682
      28,100   Principal Financial Group (The)* ................       1,394,603
                                                                     -----------
                                                                       2,168,285
                                                                     -----------
               DIVERSIFIED TELECOMMUNICATION SERVICES--1.0%
      15,300   ALLTEL Corporation ..............................         946,457
                                                                     -----------
               ELECTRONICS--1.0%
      64,000   Nintendo Co., Ltd. ADR# .........................         890,682
                                                                     -----------
               ENERGY EQUIPMENT & SERVICES--4.4%
      33,850   National-Oilwell Varco Inc.* ....................       2,114,609
      27,900   Suncor Energy, Inc. .............................       1,496,277
       8,050   Transocean Inc.* ................................         462,795
                                                                     -----------
                                                                       4,073,681
                                                                     -----------
               FINANCIAL INFORMATION SERVICES--1.0%
      28,900   Genworth Financial Inc. Cl. A ...................         915,840
                                                                     -----------
               HEALTH CARE EQUIPMENT & SUPPLIES--1.8%
      15,450   Medtronic, Inc. .................................         875,397
      15,450   St. Jude Medical, Inc.* .........................         742,682
                                                                     -----------
                                                                       1,618,079
                                                                     -----------




                                                                            -15-
THE ALGER INSTITUTIONAL FUNDS
ALGER LARGECAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS) (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               HEALTH CARE PROVIDERS & SERVICES--8.8%
      33,300   Caremark Rx, Inc.* ..............................    $  1,744,920
      12,300   CIGNA Corporation ...............................       1,425,201
      56,350   Humana Inc.* ....................................       2,501,377
      41,450   Medco Health Solutions, Inc.* ...................       2,341,925
                                                                     -----------
                                                                       8,013,423
                                                                     -----------
               HOTELS, RESTAURANTS & LEISURE--3.3%
      18,550   Carnival Corporation ............................         921,379
      16,100   Starbucks Corporation* ..........................         455,308
      27,050   Starwood Hotels & Resorts Worldwide, Inc. .......       1,580,531
                                                                     -----------
                                                                       2,957,218
                                                                     -----------
               HOUSEHOLD PRODUCTS--1.8%
      28,356   Procter & Gamble Company ........................       1,587,651
                                                                     -----------
               INSURANCE--2.4%
      21,000   American International Group, Inc. ..............       1,360,800
      27,300   Marsh & McLennan Companies, Inc. ................         795,795
                                                                     -----------
                                                                       2,156,595
                                                                     -----------
               INTERNET & CATALOG RETAIL--3.5%
      50,500   eBay Inc.* ......................................       1,999,800
      43,450   Netflix Inc.* ...................................       1,147,515
                                                                     -----------
                                                                       3,147,315
                                                                     -----------
               INTERNET SOFTWARE & SERVICES--6.7%
       8,700   Google Inc. Cl. A* ..............................       3,237,618
      76,250   Yahoo! Inc.* ....................................       2,818,963
                                                                     -----------
                                                                       6,056,581
                                                                     -----------
               MACHINERY--1.4%
      23,450   Caterpillar Inc. ................................       1,233,236
                                                                     -----------
               MEDIA--5.8%
      42,050   Disney (Walt) Company ...........................       1,024,758
      63,300   News Corporation Cl. A ..........................         902,025
     218,850   Sirius Satellite Radio Inc.* ....................       1,365,624
      17,100   Univision Communications Inc. Cl. A* ............         446,994
      53,050   XM Satellite Radio Holdings Inc. Cl. A* .........       1,529,432
                                                                     -----------
                                                                       5,268,833
                                                                     -----------
               METALS & MINING--3.0%
      34,200   Peabody Energy Corporation ......................       2,673,072
                                                                     -----------
               MULTILINE RETAIL--.9%
      13,000   Federated Department Stores, Inc. ...............         797,810
                                                                     -----------
               OIL & GAS--7.1%
      10,050   Burlington Resources Inc. .......................         725,811
      28,550   Chesapeake Energy Corporation ...................         916,455
      25,750   Sasol Ltd. ADR# .................................         823,485
      57,550   Talisman Energy Inc. ............................       2,548,890
      13,800   Valero Energy Corporation .......................       1,452,312
                                                                     -----------
                                                                       6,466,953
                                                                     -----------




                                                                            -16-
THE ALGER INSTITUTIONAL FUNDS
ALGER LARGECAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               PERSONAL CARE--1.9%
      22,750   Bausch & Lomb Incorporated ......................     $ 1,687,823
                                                                     -----------
               PHARMACEUTICALS--3.6%
      76,250   Schering-Plough Corporation .....................       1,550,925
      38,000   Wyeth ...........................................       1,693,280
                                                                     -----------
                                                                       3,244,205
                                                                     -----------
               SEMICONDUCTORS & SEMICONDUCTOR
                 EQUIPMENT--3.2%
      53,500   Altera Corporation* .............................         890,775
      29,250   Intel Corporation ...............................         687,375
      28,800   Marvell Technology Group Ltd.* ..................       1,336,608
                                                                     -----------
                                                                       2,914,758
                                                                     -----------
               SOFTWARE--4.6%
      40,700   Check Point Software Technologies Ltd.* .........         910,052
      53,300   Microsoft Corporation ...........................       1,369,810
      79,650   Oracle Corporation* .............................       1,009,962
      38,200   Symantec Corporation* ...........................         911,070
                                                                     -----------
                                                                       4,200,894
                                                                     -----------
               SPECIALTY RETAIL--1.6%
      35,200   Bed Bath & Beyond Inc.* .........................       1,426,304
                                                                     -----------
               TOBACCO--1.0%
      11,800   Altria Group, Inc. ..............................         885,590
                                                                     -----------
               Total Common Stocks
                 (Cost $81,807,970) ............................      87,882,568
                                                                     -----------

   PRINCIPAL
    AMOUNT     SHORT-TERM INVESTMENTS--1.8%
  ----------
               U.S. AGENCY OBLIGATIONS
  $1,670,000   Federal National Mortgage Association, 3.62%,
                 11/1/05 (Cost $1,670,000) .....................       1,670,000
                                                                     -----------
Total Investments
  (Cost $83,477,970)(a) .............................      98.9%      89,552,568
Other Assets in Excess of Liabilities ...............       1.1          998,382
                                                          -----      -----------
Net Assets ..........................................     100.0%     $90,550,950
                                                          =====      ===========

- ----------
*   Non-income producing security.

#   American Depositary Receipts.

(a) At October 31, 2005, the net unrealized appreciation on investments, based
    on cost for federal income tax purposes of $84,360,362 amounted to
    $5,192,206 which consisted of aggregate gross unrealized appreciation of
    $7,720,489 and aggregate gross unrealized depreciation of $2,528,283.

                       See Notes to Financial Statements.



                                                                            -17-
THE ALGER INSTITUTIONAL FUNDS
ALGER SMALLCAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS

October 31, 2005

    SHARES     COMMON STOCKS--92.0%                                       VALUE
   ---------                                                            --------
               AEROSPACE & DEFENSE--3.3%
      47,550   BE Aerospace, Inc.* .............................     $   862,081
      21,750   Esterline Technologies Corporation* .............         818,887
      25,100   SI International Inc.* ..........................         724,637
                                                                     -----------
                                                                       2,405,605
                                                                     -----------
               AIRLINES--1.1%
      52,250   AirTran Holdings, Inc.* .........................         781,660
                                                                     -----------
               AUTO COMPONETS--.7%
      17,900   LKQ Corporation* ................................         542,370
                                                                     -----------
               COMMERCIAL BANKS--1.2%
      31,650   Boston Private Financial Holdings, Inc. .........         916,268
                                                                     -----------
               BIOTECHNOLOGY--4.8%
      42,050   Alkermes, Inc.* .................................         684,994
      53,950   Encysive Pharmaceuticals Inc.* ..................         566,475
      22,800   Keryx Biopharmaceuticals, Inc.* .................         329,460
      30,250   Rigel Pharmaceuticals, Inc.* ....................         679,113
      27,300   Theravance, Inc.* ...............................         591,591
      30,600   Vertex Pharmaceuticals Incorporated* ............         696,150
                                                                     -----------
                                                                       3,547,783
                                                                     -----------
               CAPITAL MARKETS--3.1%
       9,800   Affiliated Managers Group, Inc.* ................         752,150
      15,500   Greenhill & Co., Inc. ...........................         743,225
      16,950   National Financial Partners Corporation .........         766,649
                                                                     -----------
                                                                       2,262,024
                                                                     -----------
               CHEMICALS--.9%
      21,550   Westlake Chemical Corporation ...................         627,105
                                                                     -----------
               COMMERCIAL SERVICES & SUPPLIES--5.2%
      13,450   CoStar Group Inc.* ..............................         644,927
      33,650   FTI Consulting, Inc.* ...........................         921,001
      29,650   Gevity HR, Inc. .................................         763,191
      35,900   Navigant Consulting, Inc.* ......................         752,823
      24,550   Universal Technical Institute Inc.* .............         769,151
                                                                     -----------
                                                                       3,851,093
                                                                     -----------
               COMMUNICATION EQUIPMENT--1.8%
      11,975   F5 Networks, Inc.* ..............................         623,059
      59,200   Powerwave Technologies, Inc.* ...................         663,632
                                                                     -----------
                                                                       1,286,691
                                                                     -----------
               COMPUTER SERVICES--1.0%
      36,300   Open Solutions Inc.* ............................         777,183
                                                                     -----------
               COMPUTER TECHNOLOGY--.9%
      55,250   Secure Computing Corporation* ...................         661,895
                                                                     -----------
               CONSTRUCTION & ENGINEERING--1.2%
      22,200   URS Corporation* ................................         897,546
                                                                     -----------
               ELECTRONIC EQUIPMENT & INSTRUMENTS--.5%
      12,900   Multi-Fineline Electronix, Inc.* ................         343,398
                                                                     -----------




                                                                            -18-
THE ALGER INSTITUTIONAL FUNDS
ALGER SMALLCAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               ENERGY EQUIPMENT & SERVICES--2.8%
      28,400   Hornbeck Offshore Services, Inc.* ...............     $   914,764
      13,000   Lone Star Technologies, Inc.* ...................         594,750
      30,800   Pioneer Drilling Company* .......................         527,604
                                                                     -----------
                                                                       2,037,118
                                                                     -----------
               FINANCIAL INFORMATION SERVICES--1.1%
      17,700   GFI Group Inc.* .................................         795,792
                                                                     -----------
               FOOD & STAPLES RETAILING--.9%
      22,600   Performance Food Group Co.* .....................         623,534
                                                                     -----------
               FOREIGN SEA FREIGHT--.8%
      37,350   Genco Shipping & Trading Ltd.* ..................         613,661
                                                                     -----------
               HEALTH CARE EQUIPMENT & SUPPLIES--6.1%
      16,000   Haemonetics Corporation* ........................         775,200
      15,250   Hologic, Inc.* ..................................         845,765
      47,700   Illumina, Inc.* .................................         742,689
       6,100   Intuitive Surgical, Inc.* .......................         541,253
      18,250   Sybron Dental Specialties, Inc.* ................         782,925
      21,800   Ventana Medical Systems, Inc.* ..................         835,594
                                                                     -----------
                                                                       4,523,426
                                                                     -----------
               HEALTH CARE PROVIDERS & SERVICES--6.6%
      16,850   Psychiatric Solutions, Inc.* ....................         921,695
      11,850   Sierra Health Services, Inc.* ...................         888,750
      24,750   Sunrise Senior  Living Inc.* ....................         800,415
      38,200   Symbion, Inc.* ..................................         864,466
      25,750   VCA Antech, Inc.* ...............................         664,350
      23,250   WellCare Health Plans Inc.* .....................         732,375
                                                                     -----------
                                                                       4,872,051
                                                                     -----------
               HOTELS, MOTELS, AND TOURIST COURTS--.4%
      14,750   Isle of Capri Casinos, Inc.* ....................         313,880
                                                                     -----------
               HOTELS, RESTAURANTS & LEISURE--1.9%
      28,142   Applebee's International, Inc. ..................         616,591
      15,500   Red Robin Gourmet Burgers Inc.* .................         747,565
                                                                     -----------
                                                                       1,364,156
                                                                     -----------
               INSURANCE--2.1%
      31,400   Ohio Casualty Corporation .......................         856,592
      11,900   Platinum Underwriters Holdings, Inc. ............         339,031
      24,450   Universal American Financial Corp.* .............         361,860
                                                                     -----------
                                                                       1,557,483
                                                                     -----------




                                                                            -19-
THE ALGER INSTITUTIONAL FUNDS
ALGER SMALLCAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               INTERNET SOFTWARE & SERVICES--5.6%
      41,450   Allscripts Healthcare Solutions, Inc.* ..........     $   663,200
      27,400   aQuantive, Inc.* ................................         593,210
      80,400   iVillage Inc.* ..................................         590,940
      43,650   Jupitermedia Corporation* .......................         742,050
       7,550   Netease.com Inc. ADR*# ..........................         575,839
      30,800   Openwave Systems, Inc.* .........................         550,396
       6,550   TNS Inc.* .......................................         115,149
      13,150   WebEx Communications, Inc.* .....................         301,267
                                                                     -----------
                                                                       4,132,051
                                                                     -----------
               INFORMATION TECHNOLOGY  SERVICES--1.6%
      17,400   Global Payments Inc. ............................         745,590
      31,900   Kanbay International Inc.* ......................         465,102
                                                                     -----------
                                                                       1,210,692
                                                                     -----------
               LEISURE EQUIPMENT & PRODUCTS--1.2%
      24,200   LIFE TIME FITNESS, Inc.* ........................         898,788
                                                                     -----------
               MACHINERY--3.9%
      17,450   Actuant Corporation Cl. A .......................         849,815
      18,500   Bucyrus International, Inc. Cl. A ...............         768,675
      18,950   Gardner Denver Inc.* ............................         920,970
      12,550   Watts Water Technologies, Inc. Cl. A ............         348,388
                                                                     -----------
                                                                       2,887,848
                                                                     -----------
               MEDIA--3.1%
     115,350   Harris Interactive Inc.* ........................         481,009
      10,440   Media General, Inc. Cl. A .......................         550,710
      87,150   Spanish Broadcasting System, Inc. Cl. A* ........         531,614
      53,650   World Wrestling Entertainment, Inc. Cl. A .......         684,037
                                                                     -----------
                                                                       2,247,370
                                                                     -----------
               MEDICAL TECHNOLOGY--.4%
       9,050   Syneron Medical Ltd.* ...........................         325,257
                                                                     -----------
               METALS & MINING--2.0%
      27,500   Alpha Natural Resources, Inc.* ..................         653,125
      10,000   Cleveland-Cliffs Inc. ...........................         815,400
                                                                     -----------
                                                                       1,468,525
                                                                     -----------
               OIL & GAS--4.0%
      23,900   Carrizo Oil & Gas, Inc.* ........................         619,966
      23,700   Energy Partners, Ltd. ...........................         601,269
      93,350   Grey Wolf, Inc.* ................................         716,928
      21,764   TODCO* ..........................................         973,939
                                                                     -----------
                                                                       2,912,102
                                                                     -----------
               PHARMACEUTICALS--1.5%
      41,150   Impax Laboratories, Inc.* .......................         436,190
      40,750   Medicines Company* ..............................         698,455
                                                                     -----------
                                                                       1,134,645
                                                                     -----------




                                                                            -20-
THE ALGER INSTITUTIONAL FUNDS
ALGER SMALLCAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               PHARMACEUTICAL PREPARATIONS--1.0%
      19,200   Adams Respiratory Therapeutics, Inc.* ...........     $   718,080
                                                                     -----------
               RETAIL--.9%
      23,800   Phillips-Van Heusen Corporation .................         677,110
                                                                     -----------
               ROAD & RAIL--1.2%
      23,700   Landstar Systems, Inc. ..........................         912,924
                                                                     -----------
               SEMICONDUCTOR CAPITAL EQUIPMENT--2.7%
      22,550   FormFactor Inc.* ................................         555,181
      30,700   SiRF Technology Holdings, Inc.* .................         791,753
      39,450   Veeco Instruments Inc.* .........................         626,861
                                                                     -----------
                                                                       1,973,795
                                                                     -----------
               SEMICONDUCTORS & SEMICONDUCTOR
                 EQUIPMENT--4.2%
      22,250   ATMI, Inc.* .....................................         607,647
      30,350   Microsemi Corporation* ..........................         703,209
      27,050   Photronics, Inc.* ...............................         486,900
      23,500   Tessera Technologies Inc.* ......................         655,650
      21,450   Trident Microsystems, Inc.* .....................         649,077
                                                                     -----------
                                                                       3,102,483
                                                                     -----------
               SOFTWARE--4.0%
      17,650   Hyperion Solutions Corporation* .................         853,554
      48,300   Quest Software, Inc.* ...........................         671,853
      18,050   Take-Two Interactive Software, Inc.* ............         372,733
      46,150   Verifone Holdings Inc.* .........................       1,070,680
                                                                     -----------
                                                                       2,968,820
                                                                     -----------
               SPECIALTY RETAIL--2.5%
      30,650   AnnTaylor Stores Corporation* ...................         743,876
      25,200   DSW Inc. Cl. A* .................................         524,664
      11,500   Guitar Center, Inc.* ............................         599,265
                                                                     -----------
                                                                       1,867,805
                                                                     -----------
               THRIFTS & MORTGAGE FINANCE--.9%
      46,600   Brookline Bancorp, Inc. .........................         654,730
                                                                     -----------
               WIRELESS TELECOMMUNICATION SERVICES--2.9%
      38,100   InPhonic, Inc.* .................................         550,926
      58,850   SBA Communications Corporation Cl. A* ...........         869,215
      80,800   UbiquiTel Inc.* .................................         698,112
                                                                     -----------
                                                                       2,118,253
                                                                     -----------
               Total Common Stocks
                 (Cost $59,642,904) ............................      67,813,000
                                                                     -----------




                                                                            -21-
THE ALGER INSTITUTIONAL FUNDS
ALGER SMALLCAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

   PRINCIPAL
    AMOUNT     SHORT-TERM INVESTMENTS--7.1%                               VALUE
   ---------                                                            --------
               U.S. AGENCY OBLIGATIONS
  $5,270,000   Federal National Mortgage Association, 3.62%,
                 11/1/05 (Cost $5,270,000) .....................     $ 5,270,000
                                                                     -----------
Total Investments
  (Cost $64,912,904)(a) ..............................     99.1%      73,083,000
Other Assets in Excess of Liabilities ................      0.9          628,326
                                                          -----      -----------
Net Assets ...........................................    100.0%     $73,711,326
                                                          =====      ===========






- ----------
*   Non-income producing security.

#   American Depositary Receipts.

(a) At October 31, 2005, the net unrealized appreciation on investments, based
    on cost for federal income tax purposes of $65,011,602 amounted to
    $8,071,398 which consisted of aggregate gross unrealized appreciation of
    $11,250,909 and aggregate gross unrealized depreciation of $3,179,511.

                       See Notes to Financial Statements.



                                                                            -22-
THE ALGER INSTITUTIONAL FUNDS
ALGER MIDCAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS
October 31, 2005

    SHARES     COMMON STOCKS--94.4%                                    VALUE
   ---------                                                          --------
               AEROSPACE & DEFENSE--1.0%
     138,275   L-3 Communications Holdings, Inc. .................   $10,760,561
                                                                     -----------
               BIOTECHNOLOGY--3.5%
     100,600   Celgene Corporation* ..............................     5,643,660
     511,600   Charles River Laboratories International, Inc.* ...    22,387,616
   1,347,300   Human Genome Sciences, Inc.* ......................    11,249,955
                                                                     -----------
                                                                      39,281,231
                                                                     -----------
               CAPITAL MARKETS--3.6%
     240,080   Affiliated Managers Group, Inc.* ..................    18,426,140
     104,700   Legg Mason, Inc. ..................................    11,235,357
     231,000   National Financial Partners Corporation ...........    10,448,130
                                                                     -----------
                                                                      40,109,627
                                                                     -----------
               CHEMICALS--.9%
     392,200   Lyondell  Chemical Company ........................    10,510,960
                                                                     -----------
               COMMERCIAL SERVICES & SUPPLIES--3.6%
     522,000   Education Management Corporation* .................    16,098,480
     639,500   Net 1 UEPS Technologies, Inc.* ....................    13,403,920
     279,400   West Corporation* .................................    11,022,330
                                                                     -----------
                                                                      40,524,730
                                                                     -----------
               COMMUNICATION EQUIPMENT--1.8%
     324,700   Research In Motion Limited* .......................    19,965,803
                                                                     -----------
               COMMUNICATION TECHNOLOGY--1.7%
     740,050   Nextel Partners, Inc. Cl. A* ......................    18,612,258
                                                                     -----------
               COMPUTERS & PERIPHERALS--5.1%
     333,250   Apple Computer, Inc.* .............................    19,191,867
     340,500   M-Systems Flash Disk Pioneers Ltd.* ...............    10,790,445
     403,900   Network Appliance, Inc.* ..........................    11,050,704
   1,324,400   Western Digital Corporation* ......................    16,025,240
                                                                     -----------
                                                                      57,058,256
                                                                     -----------
               COMPUTER TECHNOLOGY--.6%
     164,950   NAVTEQ* ...........................................     6,452,844
                                                                     -----------
               ELECTRIC AND ELECTRONIC EQUIPMENT--1.4%
     428,100   Roper Industries, Inc. ............................    16,139,370
                                                                     -----------
               ELECTRONICS--1.0%
     770,300   Nintendo Co., Ltd. ADR# ...........................    10,720,188
                                                                     -----------
               ENERGY EQUIPMENT & SERVICES--6.2%
     634,800   BJ Services Company ...............................    22,059,300
     120,800   Lone Star Technologies, Inc.* .....................     5,526,600
     531,950   National-Oilwell Varco Inc.* ......................    33,230,916
     397,250   Williams Companies, Inc. (The) ....................     8,858,675
                                                                     -----------
                                                                      69,675,491
                                                                     -----------
               ENGINEERING--1.3%
     224,000   Jacobs Engineering Group Inc.* ....................    14,280,000
                                                                     -----------
               FINANCIAL INFORMATION SERVICES--1.3%
     455,400   Genworth Financial Inc. Cl. A .....................    14,431,626
                                                                     -----------



                                                                            -23-
THE ALGER INSTITUTIONAL FUNDS
ALGER MIDCAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               FINANCIAL SERVICES--1.5%
   1,373,800   Hudson City Bancorp Inc. ..........................   $16,265,792
                                                                     -----------
               HEALTH CARE EQUIPMENT & SUPPLIES--1.2%
     151,600   Intuitive Surgical, Inc.* .........................    13,451,468
                                                                     -----------
               HEALTH CARE PROVIDERS & SERVICES--11.2%
     192,650   Community Health Systems Inc.* ....................     7,149,241
     399,400   DaVita, Inc.* .....................................    19,642,492
     320,300   Health Net Inc.* ..................................    15,002,852
     414,100   Humana Inc.* ......................................    18,381,899
     312,000   Medco Health Solutions, Inc.* .....................    17,628,000
     405,800   Psychiatric Solutions, Inc.* ......................    22,197,260
     198,700   Sierra Health Services, Inc.* .....................    14,902,500
     295,800   Sunrise Senior Living Inc.* .......................     9,566,172
                                                                     -----------
                                                                     124,470,416
                                                                     -----------
               HOTELS, RESTAURANTS & LEISURE--1.7%
      84,300   Kerzner International Limited* ....................     4,918,905
     305,100   Wynn Resorts, Limited* ............................    14,242,068
                                                                     -----------
                                                                      19,160,973
                                                                     -----------
               INTERNET & CATALOG RETAIL--2.9%
   1,206,217   Netflix  Inc.* ....................................    31,856,191
                                                                     -----------
               INTERNET SOFTWARE & SERVICES--4.3%
     718,100   iVillage Inc.* ....................................     5,278,035
     195,600   Netease.com Inc. ADR*# ............................    14,918,412
     437,700   SINA Corp.* .......................................    11,095,695
     603,400   VeriSign, Inc.* ...................................    14,258,342
      99,500   WebEx Communications, Inc.* .......................     2,279,545
                                                                     -----------
                                                                      47,830,029
                                                                     -----------
               INFORMATION TECHNOLOGY  SERVICES--.6%
   1,208,600   Sapient Corporation* ..............................     6,272,634
                                                                     -----------
               LEISURE & ENTERTAINMENT--.4%
     397,700   CKX, Inc.* ........................................     4,987,158
                                                                     -----------
               MACHINERY--2.1%
     121,125   Joy Global Inc. ...................................     5,556,004
     325,400   Terex Corporation* ................................    17,887,238
                                                                     -----------
                                                                      23,443,242
                                                                     -----------
               MACHINERY--OIL WELL EQUIPMENT & SERVICES--1.6%
     532,950   Patterson-UTI Energy, Inc. ........................    18,189,584
                                                                     -----------
               MANUFACTURING--.9%
     455,100   American Power Conversion Corp. ...................     9,734,589
                                                                     -----------
               MEDIA--5.2%
     163,250   Lamar Advertising Company, Cl. A* .................     7,284,215
   2,438,850   Sirius Satellite Radio Inc.* ......................    15,218,424
     706,800   Univision Communications Inc. Cl. A* ..............    18,475,752
     601,450   XM Satellite Radio Holdings Inc. Cl. A* ...........    17,339,803
                                                                     -----------
                                                                      58,318,194
                                                                     -----------



                                                                            -24-
THE ALGER INSTITUTIONAL FUNDS
ALGER MIDCAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               MEDICAL TECHNOLOGY--1.4%
     426,600   Syneron Medical Ltd.* ..........................   $   15,332,004
                                                                  --------------
               METALS & MINING--4.5%
     204,400   Cleveland-Cliffs Inc. ..........................       16,666,776
     434,500   Peabody Energy Corporation .....................       33,960,520
                                                                  --------------
                                                                      50,627,296
                                                                  --------------
               OIL & GAS--4.6%
     571,100   Chesapeake Energy Corporation ..................       18,332,310
     342,200   Frontier Oil Corporation .......................       12,620,336
     462,050   Talisman Energy Inc. ...........................       20,464,194
                                                                  --------------
                                                                      51,416,840
                                                                  --------------
               PERSONAL CARE--1.0%
     147,900   Bausch & Lomb Incorporated. ....................       10,972,701
                                                                  --------------
               PHARMACEUTICALS--2.0%
     395,250   Sepracor Inc.* .................................       22,232,813
                                                                  --------------
               SEMICONDUCTOR CAPITAL EQUIPMENT--.5%
     219,240   SiRF Technology Holdings, Inc.* ................        5,654,200
                                                                  --------------
               SEMICONDUCTORS & SEMICONDUCTOR
                 EQUIPMENT--4.8%
     536,900   Altera Corporation* ............................        8,939,385
   1,037,200   Cypress Semiconductor Corporation* .............       14,105,920
     464,100   Photronics, Inc.* ..............................        8,353,800
     797,000   Tessera Technologies Inc.* .....................       22,236,300
                                                                  --------------
                                                                      53,635,405
                                                                  --------------
               SOFTWARE--3.3%
     480,000   Check Point Software Technologies Ltd.* ........       10,732,800
     655,200   Take-Two Interactive Software, Inc.* ...........       13,529,880
     556,800   Verifone Holdings Inc.* ........................       12,917,760
                                                                  --------------
                                                                      37,180,440
                                                                  --------------
               SPECIALTY RETAIL--2.6%
     432,900   Bed Bath & Beyond Inc.* ........................       17,541,108
     316,893   Gamestop Corp. Cl. A* ..........................       11,243,364
                                                                  --------------
                                                                      28,784,472
                                                                  --------------
               TEXTILES, APPAREL & LUXURY GOODS--1.0%
     351,900   Coach, Inc.* ...................................       11,324,142
                                                                  --------------
               WIRELESS TELECOMMUNICATION SERVICES--2.1%
     374,700   Alamosa Holdings, Inc.* ........................        5,545,560
     221,200   NII Holdings Inc. Cl. B* .......................       18,341,903
                                                                  --------------
                                                                      23,887,463
                                                                  --------------
               Total Common Stocks
                 (Cost $982,021,979) ..........................   $1,053,550,991
                                                                  --------------





                                                                            -25-
THE ALGER INSTITUTIONAL FUNDS
ALGER MIDCAP GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

   PRINCIPAL
    AMOUNT     SHORT-TERM INVESTMENTS--3.6%                              VALUE
   ---------                                                            --------
               U.S. AGENCY OBLIGATIONS
 $40,150,000   Federal National Mortgage Association, 3.62%,
                 11/1/05 (Cost $40,150,000) ...................   $   40,150,000
                                                                  --------------
Total Investments
  (Cost $1,022,171,979)(a) .............................    98.0%  1,093,700,991
Other Assets in Excess of Liabilities ..................     2.0      21,912,407
                                                           -----  --------------
Net Assets .............................................   100.0% $1,115,613,398
                                                           =====  ==============






- ----------
*   Non-income producing security.

#   American Depositary Receipts.

(a) At October 31, 2005, the net unrealized appreciation on investments, based
    on cost for federal income tax purposes of $1,028,858,568, amounted to
    $64,842,423 which consisted of aggregate gross unrealized appreciation of
    $99,781,655 and aggregate gross unrealized depreciation of $34,939,232.

                       See Notes to Financial Statements.



                                                                            -26-
THE ALGER INSTITUTIONAL FUNDS
ALGER CAPITAL APPRECIATION INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS
October 31, 2005

    SHARES     COMMON STOCKS--97.3%                                      VALUE
   ---------                                                            --------
               AEROSPACE & DEFENSE--2.2%
      10,800   General Dynamics Corporation ......................   $ 1,256,040
      30,400   United Technologies Corporation ...................     1,558,912
                                                                     -----------
                                                                       2,814,952
                                                                     -----------
               AIR FREIGHT & LOGISTICS--1.6%
      24,300   UTI Worldwide, Inc. ...............................     2,078,622
                                                                     -----------
               BEVERAGES--.5%
      11,700   PepsiCo, Inc. .....................................       691,236
                                                                     -----------
               BIOTECHNOLOGY--4.9%
       8,000   Affymetrix Inc.* ..................................       363,440
      14,700   Amgen Inc.* .......................................     1,113,672
      11,600   Celgene Corporation* ..............................       650,760
      22,100   Genentech, Inc.* ..................................     2,002,260
      19,300   Gilead Sciences, Inc.* ............................       911,925
      13,500   MedImmune, Inc.* ..................................       472,230
      35,800   Vertex Pharmaceuticals Incorporated* ..............       814,450
                                                                     -----------
                                                                       6,328,737
                                                                     -----------
               CAPITAL MARKETS--.9%
      14,875   Ameritrade Holding Corporation* ...................       312,821
       7,800   Legg Mason, Inc. ..................................       837,018
                                                                     -----------
                                                                       1,149,839
                                                                     -----------
               CHEMICALS--.9%
      28,400   Lubrizol Corporation ..............................     1,181,156
                                                                     -----------
               COMMUNICATION EQUIPMENT--1.9%
      60,200   Motorola, Inc. ....................................     1,334,032
      29,250   QUALCOMM Inc. .....................................     1,162,980
                                                                     -----------
                                                                       2,497,012
                                                                     -----------
               COMMUNICATION TECHNOLOGY--2.1%
     106,000   Nextel Partners, Inc. Cl. A* ......................     2,665,900
                                                                     -----------
               COMPUTERS & PERIPHERALS--3.5%
       9,900   Apple Computer, Inc.* .............................       570,141
      19,200   Dell Inc.* ........................................       612,096
      91,800   EMC Corporation* ..................................     1,281,528
      47,800   Network Appliance, Inc.* ..........................     1,307,808
      65,800   Western Digital Corporation* ......................       796,180
                                                                     -----------
                                                                       4,567,753
                                                                     -----------
               COMPUTER TECHNOLOGY--.8%
      25,100   NAVTEQ* ...........................................       981,912
                                                                     -----------
               DIVERSIFIED FINANCIAL SERVICES--1.0%
      28,000   Citigroup Inc. ....................................     1,281,840
                                                                     -----------
               ELECTRIC AND ELECTRONIC EQUIPMENT--.5%
      17,900   Roper Industries, Inc. ............................       674,830
                                                                     -----------




                                                                            -27-
THE ALGER INSTITUTIONAL FUNDS
ALGER CAPITAL APPRECIATION INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               ENERGY EQUIPMENT & SERVICES--3.3%
      60,300   National-Oilwell Varco Inc.* ......................   $ 3,766,941
       6,100   Schlumberger Limited ..............................       553,697
                                                                     -----------
                                                                       4,320,638
                                                                     -----------
               FINANCIAL INFORMATION SERVICES--1.0%
      38,900   Genworth Financial Inc. Cl. A .....................     1,232,741
                                                                     -----------
               FINANCIAL SERVICES--.3%
      32,600   Hudson City Bancorp Inc. ..........................       385,984
                                                                     -----------
               FOOD & STAPLES RETAILING--4.1%
     122,300   CVS Corporation ...................................     2,985,343
      49,600   Wal-Mart Stores, Inc. .............................     2,346,576
                                                                     -----------
                                                                       5,331,919
                                                                     -----------
               FREIGHT & LOGISTICS--1.1%
      15,800   FedEx Corp. .......................................     1,452,494
                                                                     -----------
               HEALTH CARE--1.0%
      17,600   WellPoint Inc.* ...................................     1,314,368
                                                                     -----------
               HEALTH CARE EQUIPMENT & SUPPLIES--2.3%
       5,000   Hologic, Inc.* ....................................       277,300
      23,600   Medtronic, Inc. ...................................     1,337,176
      29,800   St. Jude Medical, Inc.* ...........................     1,432,486
                                                                     -----------
                                                                       3,046,962
                                                                     -----------
               HEALTH CARE PROVIDERS & SERVICES--4.7%
      13,800   AmerisourceBergen Corporation .....................     1,052,526
      32,100   Caremark Rx, Inc.* ................................     1,682,040
      11,400   CIGNA Corporation .................................     1,320,918
       6,400   McKesson Corporation ..............................       290,752
      21,600   PacifiCare Health Systems, Inc.* ..................     1,778,976
                                                                     -----------
                                                                       6,125,212
                                                                     -----------
               HOTELS, RESTAURANTS & LEISURE--2.2%
      13,400   Carnival Corporation ..............................       665,578
      32,900   Fairmont Hotels & Resorts Inc. ....................     1,070,237
      39,900   Penn National Gaming, Inc.* .......................     1,179,045
                                                                     -----------
                                                                       2,914,860
                                                                     -----------
               HOUSEHOLD PRODUCTS--2.9%
      67,102   Procter & Gamble Company ..........................     3,757,041
                                                                     -----------
               INDUSTRIAL CONGLOMERATES--2.2%
      76,900   General Electric Company ..........................     2,607,679
       9,100   Tyco International Ltd. ...........................       240,149
                                                                     -----------
                                                                       2,847,828
                                                                     -----------
               INSURANCE--.6%
      11,600   American International Group, Inc. ................       751,680
                                                                     -----------
               INTERNET & CATALOG RETAIL--.7%
      21,200   eBay Inc.* ........................................       839,520
                                                                     -----------




                                                                            -28-
THE ALGER INSTITUTIONAL FUNDS
ALGER CAPITAL APPRECIATION INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               INTERNET SOFTWARE & SERVICES--8.9%
      17,300   Google Inc. Cl. A* ................................   $ 6,438,022
      14,200   Netease.com Inc. ADR#* ............................     1,083,034
     110,100   Yahoo! Inc.* ......................................     4,070,397
                                                                     -----------
                                                                      11,591,453
                                                                     -----------
               LEISURE & ENTERTAINMENT--.5%
      25,500   Shanda Interactive Entertainment Ltd. ADR*# .......       631,635
                                                                     -----------
               MACHINERY--1.6%
      22,400   Caterpillar Inc. ..................................     1,178,016
      16,900   Terex Corporation* ................................       928,993
                                                                     -----------
                                                                       2,107,009
                                                                     -----------
               MACHINERY--OIL WELL EQUIPMENT & SERVICES--1.4%
      54,800   Patterson-UTI Energy, Inc. ........................     1,870,324
                                                                     -----------
               MARINE CARGO HANDLING--.1%
       3,200   American Commercial Lines Inc.* ...................        89,984
                                                                     -----------
               MEDIA--4.8%
      52,400   Disney (Walt) Company .............................     1,276,988
      21,700   Pixar* ............................................     1,100,841
     100,600   Time Warner Inc. ..................................     1,793,698
      65,500   Viacom Inc. Cl. B .................................     2,028,535
                                                                     -----------
                                                                      6,200,062
                                                                     -----------
               METALS & MINING--4.4%
      22,400   Alpha Natural Resources, Inc.* ....................       532,000
      56,000   Peabody Energy Corporation ........................     4,376,960
       6,200   Phelps Dodge Corporation ..........................       746,914
                                                                     -----------
                                                                       5,655,874
                                                                     -----------
               MULTILINE RETAIL--.7%
      19,800   Kohl's Corporation* ...............................       952,974
                                                                     -----------
               OIL & GAS--.3%
      14,600   Energy Partners, Ltd.* ............................       370,402
                                                                     -----------
               PERSONAL CARE--.7%
      12,100   Bausch & Lomb Incorporated ........................       897,699
                                                                     -----------
               PERSONAL PRODUCTS--.5%
      24,100   Avon Products, Inc. ...............................       650,459
                                                                     -----------
               PHARMACEUTICALS--8.1%
      19,500   AstraZeneca PLC Sponsored ADR# ....................       875,550
      73,575   IVAX Corporation* .................................     2,100,566
      41,900   Johnson & Johnson .................................     2,623,778
      27,400   Novartis AG ADR# ..................................     1,474,668
      28,400   Sanofi-Aventis ADR# ...............................     1,139,408
      65,200   Schering-Plough Corporation .......................     1,326,168
      18,100   Sepracor Inc.* ....................................     1,018,125
                                                                     -----------
                                                                      10,558,263
                                                                     -----------
               ROAD & RAIL--.9%
      18,600   Burlington Northern Santa Fe Corporation ..........     1,154,316
                                                                     -----------




                                                                            -29-
THE ALGER INSTITUTIONAL FUNDS
ALGER CAPITAL APPRECIATION INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               SEMICONDUCTORS & SEMICONDUCTOR
                 EQUIPMENT--5.1%
      54,400   Advanced Micro Devices, Inc.* ...................    $ 1,263,168
      21,300   Intel Corporation ...............................        500,550
      61,100   Marvell Technology Group Ltd.* ..................      2,835,651
      28,600   Silicon Storage Technology Inc.* ................        144,430
      58,300   Tessera Technologies Inc.* ......................      1,626,570
       8,400   Trident Microsystems, Inc.* .....................        254,184
                                                                   ------------
                                                                      6,624,553
                                                                   ------------
               SOFTWARE--6.3%
     183,700   Microsoft Corporation ...........................      4,721,090
      71,500   Oracle Corporation* .............................        906,620
     110,850   Verifone Holdings Inc.* .........................      2,571,720
                                                                   ------------
                                                                      8,199,430
                                                                   ------------
               SPECIALTY RETAIL--1.9%
      23,400   Abercrombie & Fitch Co. Cl. A ...................      1,216,566
      20,350   Lowe's Companies, Inc. ..........................      1,236,670
                                                                   ------------
                                                                      2,453,236
                                                                   ------------
               TEXTILES, APPAREL & LUXURY GOODS--.3%
       7,400   Polo Ralph Lauren Corporation Cl. A .............        364,080
                                                                   ------------
               TOBACCO--1.0%
      17,600   Altria Group, Inc. ..............................      1,320,880
                                                                   ------------
               WIRELESS TELECOMMUNICATION SERVICES--2.6%
      50,900   Alamosa Holdings, Inc.* .........................        753,320
      11,900   America Movil S.A. de C.V. ADR Series L# ........        312,375
      45,070   American Tower Corporation Cl. A* ...............      1,074,920
      14,300   NII Holdings Inc. CI B* .........................      1,185,756
                                                                   ------------
                                                                      3,326,371
                                                                   ------------
               Total Common Stocks
                 (Cost $111,832,397) ...........................    126,254,040
                                                                   ------------
   PRINCIPAL
    AMOUNT      SHORT-TERM INVESTMENTS--4.0%
  ----------
               U.S. AGENCY OBLIGATIONS
  $5,200,000   Federal National Mortgage Association, 3.62%,
                 11/1/05 (Cost $5,200,000) .....................      5,200,000
                                                                   ------------
Total Investments
  (Cost $117,032,397) (a) ............................... 101.3%    131,454,040
Liabilities in Excess of Other Assets ...................  (1.3)     (1,735,065)
                                                          -----    ------------
Net Assets .............................................. 100.0%   $129,718,975
                                                          =====    ============

- ----------
*   Non-income producing security.

#   American Depositary Receipts.

(a) At October 31, 2005, the net unrealized appreciation on investments, based
    on cost for federal income tax purposes of $117,088,254 amounted to
    $14,365,786 which consisted of aggregate gross unrealized appreciation of
    $16,823,398 and aggregate gross unrealized depreciation of $2,457,612.

                       See Notes to Financial Statements.




                                                                            -30-
THE ALGER INSTITUTIONAL FUNDS
ALGER BALANCED INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS
October 31, 2005

    SHARES     COMMON STOCKS--64.2%                                      VALUE
   ---------                                                            --------
               AEROSPACE & DEFENSE--1.5%
         225   General Dynamics Corporation ........................    $ 26,168
                                                                        --------
               BIOTECHNOLOGY--3.6%
         295   Amgen Inc.* .........................................      22,349
         200   Genentech, Inc.* ....................................      18,120
         240   Gilead Sciences, Inc.* ..............................      11,340
         345   MedImmune, Inc.* ....................................      12,068
                                                                        --------
                                                                          63,877
                                                                        --------
               CAPITAL MARKETS--2.1%
         190   Legg Mason, Inc. ....................................      20,389
         250   Merrill Lynch & Co., Inc. ...........................      16,185
                                                                        --------
                                                                          36,574
                                                                        --------
               CHEMICALS--.6%
         415   Lyondell Chemical Company ...........................      11,122
                                                                        --------
               COMMUNICATION EQUIPMENT--4.7%
         590   Corning Incorporated* ...............................      11,853
       1,130   Motorola, Inc. ......................................      25,041
         530   QUALCOMM Inc. .......................................      21,073
         395   Research In Motion Limited* .........................      24,288
                                                                        --------
                                                                          82,255
                                                                        --------
               COMMUNICATION TECHNOLOGY--.6%
         425   Nextel Partners, Inc. Cl. A* ........................      10,689
                                                                        --------
               COMPUTERS & PERIPHERALS--3.1%
         705   Apple Computer, Inc.* ...............................      40,601
         465   Network Appliance, Inc.* ............................      12,722
                                                                        --------
                                                                          53,323
                                                                        --------
               DIVERSIFIED FINANCIAL SERVICES--1.6%
         210   Citigroup Inc. ......................................       9,613
         355   Principal Financial Group (The)* ....................      17,619
                                                                        --------
                                                                          27,232
                                                                        --------
               DIVERSIFIED TELECOMMUNICATION SERVICES--.6%
         180   ALLTEL Corporation ..................................      11,135
                                                                        --------
               ELECTRONICS--.6%
         810   Nintendo Co., Ltd. ADR# .............................      11,273
                                                                        --------
               ENERGY EQUIPMENT & SERVICES--3.0%
         390   National-Oilwell Varco Inc.* ........................      24,364
         345   Suncor Energy, Inc. .................................      18,503
         165   Transocean Inc.* ....................................       9,485
                                                                        --------
                                                                          52,352
                                                                        --------
               FINANCIAL INFORMATION SERVICES--.7%
         365   Genworth Financial Inc. Cl. A .......................      11,567
                                                                        --------
               HEALTH CARE EQUIPMENT & SUPPLIES--1.2%
         205   Medtronic, Inc. .....................................      11,615
         200   St. Jude Medical, Inc.* .............................       9,614
                                                                        --------
                                                                          21,229
                                                                        --------



                                                                            -31-
THE ALGER INSTITUTIONAL FUNDS
ALGER BALANCED INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               HEALTH CARE PROVIDERS & SERVICES--5.8%
         430   Caremark Rx, Inc.* ..................................    $ 22,531
         155   CIGNA Corporation ...................................      17,960
         715   Humana Inc.* ........................................      31,739
         525   Medco Health Solutions, Inc.* .......................      29,663
                                                                        --------
                                                                         101,893
                                                                        --------
               HOTELS, RESTAURANTS & LEISURE--2.2%
         235   Carnival Corporation ................................      11,672
         205   Starbucks Corporation* ..............................       5,798
         345   Starwood Hotels & Resorts Worldwide, Inc. ...........      20,158
                                                                        --------
                                                                          37,628
                                                                        --------
               HOUSEHOLD PRODUCTS--1.1%
         351   Procter & Gamble Company ............................      19,653
                                                                        --------
               INSURANCE--1.6%
         265   American International Group, Inc. ..................      17,172
         345   Marsh & McLennan Companies, Inc. ....................      10,057
                                                                        --------
                                                                          27,229
                                                                        --------
               INTERNET & CATALOG RETAIL--2.4%
         680   eBay Inc.* ..........................................      26,928
         555   Netflix Inc.* .......................................      14,658
                                                                        --------
                                                                          41,586
                                                                        --------
               INTERNET SOFTWARE & SERVICES--4.4%
         110   Google Inc. Cl. A* ..................................      40,935
         965   Yahoo! Inc.* ........................................      35,676
                                                                        --------
                                                                          76,611
                                                                        --------
               MACHINERY--.8%
         275   Caterpillar Inc. ....................................      14,462
                                                                        --------
               MEDIA--4.3%
         645   Disney (Walt) Company ...............................      15,718
         885   News Corporation Cl. A ..............................      12,611
       3,570   Sirius Satellite Radio Inc.* ........................      22,277
         225   Univision Communications Inc. Cl. A* ................       5,882
         655   XM Satellite Radio Holdings Inc. Cl. A* .............      18,884
                                                                        --------
                                                                          75,372
                                                                        --------
               METALS & MINING--1.9%
         435   Peabody Energy Corporation ..........................      34,000
                                                                        --------
               MULTILINE RETAIL--.9%
         255   Federated Department Stores, Inc. ...................      15,649
                                                                        --------
               OIL & GAS--4.5%
         115   Burlington Resources Inc. ...........................       8,305
         330   Chesapeake Energy Corporation .......................      10,594
         330   Sasol Ltd. ADR# .....................................      10,553
         675   Talisman Energy Inc. ................................      29,896
         180   Valero Energy Corporation ...........................      18,943
                                                                        --------
                                                                          78,291
                                                                        --------



                                                                            -32-
THE ALGER INSTITUTIONAL FUNDS
ALGER BALANCED INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                VALUE
   ---------                                                          --------
               PERSONAL CARE--1.2%
         285   Bausch & Lomb Incorporated .........................   $   21,144
                                                                      ----------
               PHARMACEUTICALS--2.4%
         970   Schering-Plough Corporation ........................       19,730
         485   Wyeth ..............................................       21,611
                                                                      ----------
                                                                          41,341
                                                                      ----------
               SEMICONDUCTORS & SEMICONDUCTOR
                 EQUIPMENT--2.1%
         675   Altera Corporation* ................................       11,238
         370   Intel Corporation ..................................        8,695
         365   Marvell Technology Group Ltd.* .....................       16,940
                                                                      ----------
                                                                          36,873
                                                                      ----------
               SOFTWARE--3.0%
         515   Check Point Software Technologies Ltd.* ............       11,516
         680   Microsoft Corporation ..............................       17,476
         930   Oracle Corporation* ................................       11,792
         485   Symantec Corporation* ..............................       11,567
                                                                      ----------
                                                                          52,351
                                                                      ----------
               SPECIALTY RETAIL--1.0%
         440   Bed Bath & Beyond Inc.* ............................       17,829
                                                                      ----------
               TOBACCO--.7%
         160   Altria Group, Inc. .................................       12,008
                                                                      ----------
               Total Common Stocks
                 (Cost $1,044,356) ................................    1,122,716
                                                                      ----------
   PRINCIPAL
    AMOUNT     CORPORATE BONDS--8.3%
   ---------
               AEROSPACE & DEFENSE--.6%
     $ 6,227   Systems 2001 Asset Trust Cl. G, 6.66%, 9/15/13(a) ..        6,596
       5,000   United Technologies, 4.875%, 11/1/06 ...............        5,019
                                                                      ----------
                                                                          11,615
                                                                      ----------
               CABLE--.3%
       6,000   Cox Communications, Inc., 5.45%, 12/15/14 ..........        5,838
                                                                      ----------
               CAPITAL MARKETS--.5%
      10,000   Goldman Sachs Group, Inc., 4.75%, 7/15/13 ..........        9,606
                                                                      ----------
               COMMERCIAL BANKS--.8%
       4,000   Associates Corp. North America, 6.95%, 11/1/18 .....        4,580
       5,000   Key Bank NA, 4.95%, 9/15/15 ........................        4,843
       5,000   Synovus Financial Corp., 5.125%, 6/15/17 ...........        4,871
                                                                      ----------
                                                                          14,294
                                                                      ----------




                                                                            -33-
THE ALGER INSTITUTIONAL FUNDS
ALGER BALANCED INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

   PRINCIPAL
    AMOUNT     CORPORATE BONDS (CONTINUED)                               VALUE
   ---------                                                            --------
               DIVERSIFIED FINANCIAL SERVICES--1.2%
     $ 5,000   CIT Group, Inc., 5.20%, 11/3/10 ....................   $    4,999
       5,000   JPMorgan Chase & Co., 7.00%, 11/15/09 ..............        5,358
      10,000   J.P. Morgan Chase & Co., 4.60%, 1/17/11 ............        9,755
                                                                      ----------
                                                                          20,112
                                                                      ----------
               DIVERSIFIED TELECOMMUNICATION SERVICES--.8%
      15,000   Telecom Italia Capital, 4.95%, 9/30/14 .............       14,259
                                                                      ----------
               ELECTRIC UTILITIES--.6%
      10,000   First Energy, 5.65%, 6/15/09(a) ....................       10,135
                                                                      ----------
               FINANCE--.5%
       5,000   Caterpillar Financial Services Corporation,
                 3.70%, 8/15/08 ...................................        4,856
       5,000   SLM Corp., 4.50%, 7/26/10 ..........................        4,884
                                                                      ----------
                                                                           9,740
                                                                      ----------
               GAS UTILITIES--.3%
       5,000   Nisource Inc., 5.25%, 9/15/17 ......................        4,793
                                                                      ----------
               HEALTH CARE PROVIDERS & SERVICES--.6%
       5,000   Manor Care, Inc., 6.25%, 5/1/13 ....................        5,158
       5,000   Quest Diagnostics Incorporated, 5.125%, 11/1/10(a) .        4,996
                                                                      ----------
                                                                          10,154
                                                                      ----------
               INSURANCE--.6%
       5,000   Markel Corp., 7.00%, 5/15/08 .......................        5,195
       5,000   The Chubb Corporation, 4.93%, 11/16/07 .............        5,001
                                                                      ----------
                                                                          10,196
                                                                      ----------
               MEDIA--.3%
       3,000   Comcast Corporation, 6.50%, 1/15/15 ................        3,149
       2,000   Liberty Media Corporation Floating Rate Note,
                 5.37%, 9/17/06 ...................................        2,016
                                                                      ----------
                                                                           5,165
                                                                      ----------
               METAL FABRICATING--.3%
       5,000   Timken Co., 5.75%, 2/15/10 .........................        5,005
                                                                      ----------
               OIL & GAS--.3%
       5,000   Canadian Natural Resources, 4.90%, 12/1/14 .........        4,863
                                                                      ----------
               OIL AND GAS EXTRACTION--.3%
       5,000   Enterprise Products Partners Series B, 5.60%,
                 10/15/14 .........................................        4,915
                                                                      ----------
               WIRELESS TELECOMMUNICATION SERVICES--.3%
       5,000   Nextel Communications, Inc., 7.375%, 8/1/15 ........        5,296
                                                                      ----------
               Total Corporate Bonds
                 (Cost $149,081) ..................................      145,986
                                                                      ----------



                                                                            -34-
THE ALGER INSTITUTIONAL FUNDS
ALGER BALANCED INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

   PRINCIPAL
    AMOUNT                                                               VALUE
   ---------                                                            --------
               U.S. GOVERNMENT & AGENCY OBLIGATIONS--23.1%
               Federal National Mortgage Association,
     $20,000     4.25%, 7/15/07 ...................................    $  19,882
       7,000     3.25%, 8/15/08 ...................................        6,748
       5,000     4.25%, 5/15/09 ...................................        4,935
      15,000     4.01%, 10/21/09 ..................................       14,616
      20,000     4.30%, 1/19/10 ...................................       19,655
      10,000     5.00%, 4/19/10 ...................................        9,954
       8,177     4.80%, 4/25/10 ...................................        8,124
      15,000     4.125%, 4/15/14 ..................................       14,194
       5,000     6.625%, 11/15/30 .................................        6,035
               Federal Home Loan Mortgage Corporation,
      30,000     4.125%, 11/18/09 .................................       29,340
      15,000     4.30%, 2/3/11 ....................................       14,523
      10,000     4.50%, 1/15/14 ...................................        9,748
               Federal Home Loan Banks,
       9,770     4.75%, 10/25/10 ..................................        9,678
      10,000     5.50%, 5/18/15 ...................................        9,819
               U.S. Treasury Bonds,
       5,000     7.50%, 11/15/16 ..................................        6,205
      25,000     5.375%, 2/15/31 ..................................       27,272
               U.S. Treasury Notes,
      10,000     3.75%, 3/31/07 ...................................        9,915
      73,000     3.25%, 8/15/07 ...................................       71,606
      20,000     3.00%, 11/15/07 ..................................       19,473
       5,000     3.125%, 9/15/08 ..................................        4,829
      20,000     3.50%, 11/15/09 ..................................       19,302
      27,000     4.375%, 8/15/12 ..................................       26,785
      10,000     4.25%, 8/15/13 ...................................        9,810
      10,000     4.75%, 5/15/14 ...................................       10,128
      22,000     4.00%, 2/15/15 ...................................       21,043
                                                                      ----------
               Total U.S. Government & Agency Obligations
                 (Cost $411,620) ..................................      403,619
Total Investments,
  (Cost $1,605,057)(b) .................................    95.6%      1,672,321
Other Assets in Excess of Liabilities ..................     4.4          76,061
                                                           -----      ----------
Net Assets .............................................   100.0%     $1,748,382
                                                           =====      ==========

- ----------
*   Non-income producing security.

#   American Depositary Receipts.

(a) Pursuant to Securities and Exchange Commission Rule 144A, these securities
    may be sold prior to their maturity only to qualified institutional buyers.
    These securities are deemed to be liquid and represent 1.2% of net assets of
    the Portfolio.

(b) At October 31, 2005, the net unrealized appreciation on investments, based
    on cost for federal income tax purposes of $1,608,894 amounted to $63,427
    which consisted of aggregate gross unrealized appreciation of $100,399 and
    aggregate gross unrealized depreciation of $36,972.

                       See Notes to Financial Statements.




                                                                            -35-
THE ALGER INSTITUTIONAL FUNDS
ALGER SOCIALLY RESPONSIBLE GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS
October 31, 2005

    SHARES     COMMON STOCKS--95.5%                                      VALUE
   ---------                                                            --------
               AIR FREIGHT & LOGISTICS--1.5%
         325   UTI Worldwide, Inc. ................................   $   27,801
                                                                      ----------
               BEVERAGES--.5%
         170   PepsiCo, Inc. ......................................       10,044
                                                                      ----------
               BIOTECHNOLOGY--4.8%
         115   Affymetrix Inc.* ...................................        5,224
         215   Amgen Inc.* ........................................       16,288
         165   Celgene Corporation* ...............................        9,257
         320   Genentech, Inc.* ...................................       28,992
         280   Gilead Sciences, Inc.* .............................       13,230
         195   MedImmune, Inc.* ...................................        6,821
         450   Vertex Pharmaceuticals Incorporated* ...............       10,238
                                                                      ----------
                                                                          90,050
                                                                      ----------
               CAPITAL MARKETS--.9%
         225   Ameritrade Holding Corporation* ....................        4,731
         115   Legg Mason, Inc. ...................................       12,341
                                                                      ----------
                                                                          17,072
                                                                      ----------
               CHEMICALS--.9%
         405   Lubrizol Corporation ...............................       16,844
                                                                      ----------
               COMMUNICATION EQUIPMENT--1.9%
         860   Motorola, Inc. .....................................       19,058
         420   QUALCOMM Inc. ......................................       16,699
                                                                      ----------
                                                                          35,757
                                                                      ----------
               COMMUNICATION TECHNOLOGY--2.6%
       1,895   Nextel Partners, Inc. Cl. A* .......................       47,659
                                                                      ----------
               COMPUTERS & PERIPHERALS--3.5%
         145   Apple Computer, Inc.* ..............................        8,350
         260   Dell Inc.* .........................................        8,289
       1,335   EMC Corporation* ...................................       18,637
         690   Network Appliance, Inc.* ...........................       18,878
         950   Western Digital Corporation* .......................       11,495
                                                                      ----------
                                                                          65,649
                                                                      ----------
               COMPUTER TECHNOLOGY--.8%
         360   NAVTEQ* ............................................       14,083
                                                                      ----------
               DIVERSIFIED FINANCIAL SERVICES--.9%
         350   Citigroup Inc. .....................................       16,023
                                                                      ----------
               ELECTRIC AND ELECTRONIC EQUIPMENT--1.4%
         705   Roper Industries, Inc. .............................       26,578
                                                                      ----------
               ENERGY EQUIPMENT & SERVICES--4.1%
         850   National-Oilwell Varco Inc.* .......................       53,100
          90   Schlumberger Limited ...............................        8,168
         250   Transocean Inc.* ...................................       14,373
                                                                      ----------
                                                                          75,641
                                                                      ----------
               FINANCIAL INFORMATION SERVICES--1.0%
         560   Genworth Financial Inc. Cl. A ......................       17,746
                                                                      ----------



                                                                            -36-
THE ALGER INSTITUTIONAL FUNDS
ALGER SOCIALLY RESPONSIBLE GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               FINANCIAL SERVICES--.3%
         470   Hudson City Bancorp Inc. ..........................    $    5,565
                                                                      ----------
               FOOD & STAPLES RETAILING--3.9%
       1,600   CVS Corporation ...................................        39,056
         710   Wal-Mart Stores, Inc. .............................        33,590
                                                                      ----------
                                                                          72,646
                                                                      ----------
               FREIGHT & LOGISTICS--.7%
         150   FedEx Corp. .......................................        13,790
                                                                      ----------
               HEALTH CARE--1.0%
         240   WellPoint Inc.* ...................................        17,923
                                                                      ----------
               HEALTH CARE EQUIPMENT & SUPPLIES--3.0%
          80   Hologic, Inc.* ....................................         4,436
         475   Medtronic, Inc. ...................................        26,914
         510   St. Jude Medical, Inc.* ...........................        24,516
                                                                      ----------
                                                                          55,866
                                                                      ----------
               HEALTH CARE PROVIDERS & SERVICES--4.1%
         150   AmerisourceBergen Corporation .....................        11,440
         150   CIGNA Corporation .................................        17,380
         150   McKesson Corporation ..............................         6,815
         505   PacifiCare Health Systems, Inc.* ..................        41,592
                                                                      ----------
                                                                          77,227
                                                                      ----------
               HOTELS, RESTAURANTS & LEISURE--2.6%
         190   Carnival Corporation ..............................         9,437
       1,175   Fairmont Hotels & Resorts Inc. ....................        38,223
                                                                      ----------
                                                                          47,660
                                                                      ----------
               HOUSEHOLD PRODUCTS--3.4%
       1,144   Procter & Gamble Company ..........................        64,052
                                                                      ----------
               INDUSTRIAL CONGLOMERATES--.2%
         130   Tyco International Ltd. ...........................         3,431
                                                                      ----------
               INSURANCE--.7%
         150   American International Group, Inc. ................         9,720
          65   St. Paul Travelers Companies, Inc. (The) ..........         2,927
                                                                      ----------
                                                                          12,647
                                                                      ----------
               INTERNET & CATALOG RETAIL--.7%
         305   eBay Inc.* ........................................        12,078
                                                                      ----------
               INTERNET SOFTWARE & SERVICES--9.9%
         400   aQuantive, Inc.* ..................................         8,660
         250   Google Inc. Cl. A* ................................        93,035
         555   Jupitermedia Corporation* .........................         9,435
         205   Netease.com Inc. ADR*# ............................        15,635
       1,585   Yahoo! Inc.* ......................................        58,597
                                                                      ----------
                                                                         185,362
                                                                      ----------
               LEISURE & ENTERTAINMENT--.5%
         365   Shanda Interactive Entertainment Ltd. ADR*# .......         9,041
                                                                      ----------



                                                                            -37-
THE ALGER INSTITUTIONAL FUNDS
ALGER SOCIALLY RESPONSIBLE GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               MACHINERY--1.8%
         380   Caterpillar Inc. ...................................   $   19,984
         245   Terex Corporation* .................................       13,468
                                                                      ----------
                                                                          33,452
                                                                      ----------
               MACHINERY--OIL WELL EQUIPMENT & SERVICES--1.5%
         790   Patterson-UTI Energy, Inc. .........................       26,962
                                                                      ----------
               MARINE CARGO HANDLING--.1%
          50   American Commercial Lines Inc.* ....................        1,406
                                                                      ----------
               MEDIA--5.5%
         750   Disney (Walt) Company ..............................       18,278
         310   Pixar* .............................................       15,726
       1,800   Time Warner Inc. ...................................       32,094
       1,170   Viacom Inc. Cl. B ..................................       36,235
                                                                      ----------
                                                                         102,333
                                                                      ----------
               METALS & MINING--4.4%
         325   Alpha Natural Resources, Inc.* .....................        7,719
         805   Peabody Energy Corporation .........................       62,919
          90   Phelps Dodge Corporation ...........................       10,842
                                                                      ----------
                                                                          81,480
                                                                      ----------
               MULTILINE RETAIL--.7%
         285   Kohl's Corporation* ................................       13,717
                                                                      ----------
               OIL & GAS--1.3%
         210   Energy Partners, Ltd.* .............................        5,327
         450   Talisman Energy Inc. ...............................       19,931
                                                                      ----------
                                                                          25,258
                                                                      ----------
               PERSONAL CARE--1.0%
         240   Bausch & Lomb Incorporated .........................       17,806
                                                                      ----------
               PERSONAL PRODUCTS--.5%
         345   Avon Products, Inc. ................................        9,312
                                                                      ----------
               PHARMACEUTICALS--6.1%
         400   AstraZeneca PLC Sponsored ADR# .....................       17,960
         900   IVAX Corporation* ..................................       25,695
         350   Novartis AG ADR# ...................................       18,837
         350   Sanofi-Aventis ADR# ................................       14,042
         800   Schering-Plough Corporation ........................       16,272
         370   Sepracor Inc.* .....................................       20,813
                                                                      ----------
                                                                         113,619
                                                                      ----------
               ROAD & RAIL--.9%
         270   Burlington Northern Santa Fe Corporation ...........       16,756
                                                                      ----------





                                                                            -38-
THE ALGER INSTITUTIONAL FUNDS
ALGER SOCIALLY RESPONSIBLE GROWTH INSTITUTIONAL FUND
SCHEDULE OF INVESTMENTS (CONTINUED)
October 31, 2005

    SHARES     COMMON STOCKS (CONTINUED)                                 VALUE
   ---------                                                            --------
               SEMICONDUCTORS & SEMICONDUCTOR
                 EQUIPMENT--5.2%
         790   Advanced Micro Devices, Inc.* ....................   $     18,344
         310   Intel Corporation ................................          7,285
         855   Marvell Technology Group Ltd.* ...................         39,681
         410   Silicon Storage Technology Inc.* .................          2,071
         945   Tessera Technologies Inc.* .......................         26,366
         120   Trident Microsystems, Inc.* ......................          3,631
                                                                    ------------
                                                                          97,378
                                                                    ------------
               SOFTWARE--6.1%
       2,575   Microsoft Corporation ............................         66,178
         980   Oracle Corporation* ..............................         12,426
       1,480   Verifone Holdings Inc.* ..........................         34,336
                                                                    ------------
                                                                         112,940
                                                                    ------------
               SPECIALTY RETAIL--1.8%
         340   Abercrombie & Fitch Co. Cl. A ....................         17,676
         250   Lowe's Companies,  Inc. ..........................         15,193
                                                                    ------------
                                                                          32,869
                                                                    ------------
               TEXTILES, APPAREL & LUXURY GOODS--.3%
         105   Polo Ralph Lauren Corporation Cl. A ..............          5,165
                                                                    ------------
               WIRELESS TELECOMMUNICATION SERVICES--2.5%
         695   Alamosa Holdings, Inc.* ..........................         10,286
         170   America Movil S.A. de C.V. ADR Series L# .........          4,463
         649   American Tower Corporation Cl. A* ................         15,479
         195   NII Holdings Inc. CI. B* .........................         16,170
                                                                    ------------
                                                                          46,398
                                                                    ------------
               Total Common Stocks
                 (Cost $1,567,725) ..............................      1,775,086
                                                                    ------------
Total Investments
  (Cost $1,567,725)(a) .................................    95.5%      1,775,086
Other Assets in Excess of Liabilities ..................     4.5          84,572
                                                           -----    ------------
Net Assets .............................................   100.0%   $  1,859,658
                                                           =====    ============

- ----------
*   Non-income producing security.

#   American Depositary Receipts.

(a) At October 31, 2005, the net unrealized appreciation on investments, based
    on cost for federal income tax purposes of $1,568,208 amounted to $206,878
    which consisted of aggregate gross unrealized appreciation of $238,873 and
    aggregate gross unrealized depreciation of $31,995.

                       See Notes to Financial Statements.









                       This Page Intentionally Left Blank







                                                                            -40-
THE ALGER INSTITUTIONAL FUNDS
STATEMENTS OF ASSETS AND LIABILITIES
October 31, 2005




                                                     LargeCap            SmallCap
                                                      Growth              Growth
                                                       Fund                Fund
                                                   ------------         ----------
                                                                
ASSETS:
Investments in securities, at value
  (identified cost*)--see accompanying
  schedules of investments .....................  $ 89,552,568        $ 73,083,000
Cash ...........................................       466,155              20,362
Receivable for investment securities sold ......     1,406,837             751,548
Receivable for shares of beneficial
  interest sold ................................       105,711             853,947
Dividends and interest receivable ..............        22,990               7,240
Receivable from Investment Manager--
  Note 3(a) ....................................            --                  --
Prepaid expenses ...............................           839               2,503
                                                  ------------        ------------
  Total Assets .................................    91,555,100          74,718,600
                                                  ------------        ------------
LIABILITIES:
Payable for investment securities purchased ....       783,867             834,349
Payable for shares of beneficial interest
  redeemed .....................................       119,290              89,302
Accrued investment management fees .............        57,063              51,732
Accrued transfer agent fees ....................           666               1,821
Accrued expenses ...............................        43,264              30,070
                                                  ------------        ------------
  Total Liabilities ............................     1,004,150           1,007,274
                                                  ------------        ------------
NET ASSETS .....................................  $ 90,550,950        $ 73,711,326
                                                  ============        ============
Net Assets Consist of:
  Paid-in capital ..............................  $109,444,055        $128,171,458
  Accumulated net investment income (loss) .....       274,397                  --
  Undistributed net realized gain
    (accumulated loss) .........................   (25,242,100)        (62,630,228)
  Net unrealized appreciation (depreciation) ...     6,074,598           8,170,096
                                                  ------------        ------------
NET ASSETS .....................................  $ 90,550,950        $ 73,711,326
                                                  ============        ============
Shares of beneficial interest outstanding--
  Note 6
  Class I ......................................     6,902,835           3,566,115
                                                  ============        ============
  Class R ......................................       308,797             125,998
                                                  ============        ============
Net Asset Value Per Share
  Class I ......................................  $      12.56        $      19.97
                                                  ============        ============
  Class R ......................................  $      12.39        $      19.74
                                                  ============        ============
*Identified cost ...............................  $ 83,477,970        $ 64,912,904
                                                  ============        ============


                       See Notes to Financial Statements.



                                                                            -41-




                                                                                                                          Socially
                                                         MidCap               Capital                                    Responsible
                                                         Growth            Appreciation             Balanced               Growth
                                                          Fund                 Fund                   Fund                  Fund
                                                        ---------          ------------            ----------           ------------
                                                                                                             
ASSETS:
Investments in securities, at value
  (identified cost*)--see accompanying
  schedules of investments .....................    $1,093,700,991        $131,454,040             $1,672,321            $1,775,086
Cash ...........................................         3,363,940              37,211                 68,063               162,293
Receivable for investment securities sold ......        90,246,013           1,085,878                 14,206                15,886
Receivable for shares of beneficial
  interest sold ................................         3,078,662             403,959                  1,226                    --
Dividends and interest receivable ..............            15,055              38,657                  6,655                   544
Receivable from Investment Manager--
  Note 3(a) ....................................                --                  --                    692                 1,017
Prepaid expenses ...............................            12,703               1,165                    109                   429
                                                    --------------        ------------             ----------            ----------
  Total Assets .................................     1,190,417,364         133,020,910              1,763,272             1,955,255
                                                    --------------        ------------             ----------            ----------
LIABILITIES:
Payable for investment securities purchased ....        72,730,405           3,062,355                  9,934                90,298
Payable for shares of beneficial interest
  redeemed .....................................           962,970              99,435                     --                    --
Accrued investment management fees .............           744,814              91,350                  1,103                 1,159
Accrued transfer agent fees ....................            13,083               1,862                    121                   126
Accrued expenses ...............................           352,694              46,933                  3,732                 4,014
                                                    --------------        ------------             ----------            ----------
  Total Liabilities ............................        74,803,966           3,301,935                 14,890                95,597
                                                    --------------        ------------             ----------            ----------
NET ASSETS .....................................    $1,115,613,398        $129,718,975             $1,748,382            $1,859,658
                                                    ==============        ============             ==========            ==========
Net Assets Consist of:
  Paid-in capital ..............................     $ 927,521,288         217,858,156              1,541,818             1,449,596
  Accumulated net investment income (loss) .....                --              46,145                  7,357                    --
  Undistributed net realized gain
    (accumulated loss) .........................       116,563,098        (102,606,969)               131,943               202,701
  Net unrealized appreciation (depreciation) ...        71,529,012          14,421,643                 67,264               207,361
                                                    --------------        ------------             ----------            ----------
NET ASSETS .....................................    $1,115,613,398         129,718,975              1,748,382             1,859,658
                                                    ==============        ============             ==========            ==========
Shares of beneficial interest outstanding--
  Note 6
  Class I ......................................        62,233,472           9,689,139                193,914               244,013
                                                    ==============        ============             ==========            ==========
  Class R ......................................         1,276,432              81,916                 25,320                58,233
                                                    ==============        ============             ==========            ==========
Net Asset Value Per Share
  Class I ......................................             17.57               13.28                   7.99                  6.17
                                                    ==============        ============             ==========            ==========
  Class R ......................................    $        17.34        $      13.09             $     7.90            $     6.09
                                                    ==============        ============             ==========            ==========
*Identified cost ...............................    $1,022,171,979        $117,032,397             $1,605,057            $1,567,725
                                                    ==============        ============             ==========            ==========




                                                                            -42-
THE ALGER INSTITUTIONAL FUNDS
STATEMENTS OF OPERATIONS
For the year ended October, 2005




                                                     LargeCap            SmallCap
                                                      Growth              Growth
                                                       Fund                Fund
                                                   ------------         ----------
                                                                   
INVESTMENT INCOME
Income:
  Dividends (net of foreign
    withholding taxes*) .......................   $  1,266,644           $ 194,669
  Interest ....................................         46,021              97,513
                                                  ------------        ------------
   Total income ...............................      1,312,665             292,182
                                                  ------------        ------------
Expenses:
  Management fees--Note 3(a) ..................        712,120             569,374
  Shareholder servicing fees ..................        237,373             167,463
  Custodian fees ..............................         26,007              22,749
  Transfer agent fees--Note 3(d) ..............          7,027               9,649
  Professional fees ...........................          8,030               4,341
  Printing fees ...............................          6,490              10,665
  Distribution fees--Note 3(b) ................         16,919               6,485
  Trustees' fees ..............................          2,308               1,637
  Interest expense ............................          3,077               3,196
  Miscellaneous ...............................         18,917              17,323
                                                  ------------        ------------
                                                     1,038,268             812,882

Less expense reimbursement--Note 3(a) .........             --                  --
                                                  ------------        ------------
  Total Expenses ..............................      1,038,268             812,882
                                                  ------------        ------------
NET INVESTMENT INCOME (LOSS) ..................        274,397            (520,700)
                                                  ------------        ------------
REALIZED AND UNREALIZED
  GAIN ON INVESTMENTS:
  Net realized gain on investments ............     13,970,405          12,443,285
  Net change in unrealized appreciation
  (depreciation) on investments ...............       (267,665)          3,593,847
                                                  ------------        ------------
  Net realized and unrealized gain
    on investments ............................     13,702,740          16,037,132
                                                  ------------        ------------
  NET INCREASE IN NET ASSETS RESULTING
    FROM OPERATIONS ...........................   $ 13,977,137        $ 15,516,432
                                                  ============        ============
*Foreign withholding taxes ....................   $        332        $         --
                                                  ============        ============


                       See Notes to Financial Statements.




                                                                            -43-




                                                                                                                          Socially
                                                        MidCap                  Capital                                 Responsible
                                                        Growth               Appreciation             Balanced            Growth
                                                         Fund                    Fund                   Fund               Fund
                                                       ---------             ------------            ----------        ------------
                                                                                                             
INVESTMENT INCOME
Income:
  Dividends (net of foreign
    withholding taxes*) .......................     $   3,172,026           $  1,443,816             $  14,424           $  15,830
  Interest ....................................         1,424,468                123,827                21,668                  70
                                                    -------------           ------------             ---------           ---------
   Total income ...............................         4,596,494              1,567,643                36,092              15,900
                                                    -------------           ------------             ---------           ---------
Expenses:
  Management fees--Note 3(a) ..................         8,060,299              1,098,969                12,579              12,369
  Shareholder servicing fees ..................         2,518,843                323,226                 3,073               3,091
  Custodian fees ..............................           101,555                 28,291                12,593              11,529
  Transfer agent fees--Note 3(d) ..............            79,038                 11,341                   380                 554
  Professional fees ...........................            45,980                  6,951                 2,144               1,709
  Printing fees ...............................           117,725                 11,265                 2,007               2,007
  Distribution fees--Note 3(b) ................            87,076                  4,544                   947               1,234
  Trustees' fees ..............................            24,341                  3,146                    40                  40
  Interest expense ............................                 0                    607                    --                  --
  Miscellaneous ...............................           146,756                 33,158                 1,631               1,613
                                                    -------------           ------------             ---------           ---------
                                                       11,181,613              1,521,498                35,394              34,146

Less expense reimbursement--Note 3(a) .........                --                     --               (13,482)            (12,294)
                                                    -------------           ------------             ---------           ---------
  Total Expenses ..............................        11,181,613              1,521,498                21,912              21,852
                                                    -------------           ------------             ---------           ---------
NET INVESTMENT INCOME (LOSS) ..................        (6,585,119)                46,145                14,180              (5,952)
                                                    -------------           ------------             ---------           ---------
REALIZED AND UNREALIZED
  GAIN ON INVESTMENTS:
  Net realized gain on investments ............       128,514,342             20,951,677               147,670             209,975
  Net change in unrealized appreciation
  (depreciation) on investments ...............        18,827,371              2,819,558                (4,164)             85,690
                                                    -------------           ------------             ---------           ---------
  Net realized and unrealized gain
    on investments ............................       147,341,713             23,771,235               143,506             295,665
                                                    -------------           ------------             ---------           ---------
  NET INCREASE IN NET ASSETS RESULTING
    FROM OPERATIONS ...........................     $ 140,756,594           $ 23,817,380             $ 157,686           $ 289,713
                                                    =============           ============             =========           =========
*Foreign withholding taxes ....................     $       4,952           $      3,710             $       4           $      63
                                                    =============           ============             =========           =========




                                                                            -44-
THE ALGER INSTITUTIONAL FUNDS
STATEMENTS OF CHANGES IN NET ASSETS



                                                               LargeCap
                                                                Growth
                                                                 Fund
                                                 ---------------------------------
                                                     For the             For the
                                                   Year Ended          Year Ended
                                                   October 31,         October 31,
                                                      2005                2004
                                                 -------------       -------------
                                                               
Net investment income (loss) ................    $     274,397       $    (501,149)
Net realized gain on investments ............       13,970,405           8,360,426
Net change in unrealized appreciation
  (depreciation) on investments .............         (267,665)         (6,519,566)
                                                 -------------       -------------
Net increase in net assets
  resulting from operations .................       13,977,137           1,339,711
                                                 -------------       -------------
Dividends and distributions to
  shareholders from:
  Net investment income
  Class I ...................................               --                  --
  Class R ...................................               --                  --
  Net realized gains
  Class I ...................................               --                  --
  Class R ...................................               --                  --
                                                 -------------       -------------
Total dividends and distributions to
  shareholders ..............................               --                  --
                                                 -------------       -------------
Increase (decrease) from shares
  of beneficial interest transactions:
  Class I ...................................      (14,888,992)         (4,892,989)
  Class R ...................................          871,501           2,423,531
                                                 -------------       -------------
Net increase (decrease) from shares
  of beneficial interest
  transactions--Note 6 ......................      (14,017,491)         (2,469,458)
                                                 -------------       -------------
    Total increase (decrease) ...............          (40,354)         (1,129,747)
Net Assets:
  Beginning of year .........................       90,591,304          91,721,051
                                                 -------------       -------------
  End of year ...............................    $  90,550,950       $  90,591,304
                                                 =============       =============
Undistributed net investment income
  (accumulated loss) ........................    $     274,397       $    (501,149)
                                                 =============       =============


                       See Notes to Financial Statements.



                                                                            -45-




                                                                 SmallCap                                       MidCap
                                                                  Growth                                        Growth
                                                                   Fund                                          Fund
                                                  ------------------------------------        -------------------------------------
                                                     For the                 For the                For the               For the
                                                   Year Ended              Year Ended             Year Ended            Year Ended
                                                   October 31,             October 31,            October 31,           October 31,
                                                      2005                    2004                   2005                  2004
                                                  -------------          -------------        ---------------         -------------
                                                                                                          
Net investment income (loss) ..................   $    (520,700)         $    (918,437)       $    (6,585,119)        $  (6,352,257)
Net realized gain on investments ..............      12,443,285             19,348,420            128,514,342            38,265,061
Net change in unrealized appreciation
  (depreciation) on investments ...............       3,593,847            (13,191,873)            18,827,371           (10,878,579)
                                                  -------------          -------------        ---------------         -------------
Net increase in net assets
  resulting from operations ...................      15,516,432              5,238,110            140,756,594            21,034,225
                                                  -------------          -------------        ---------------         -------------
Dividends and distributions to
  shareholders from:
  Net investment income
  Class I .....................................              --                     --                     --                    --
  Class R .....................................              --                     --                     --                    --
  Net realized gains
  Class I .....................................              --                     --            (14,080,915)                   --
  Class R .....................................              --                     --               (225,450)                   --
                                                  -------------          -------------        ---------------         -------------
Total dividends and distributions to
  shareholders ................................              --                     --           (14,306,365)                    --
                                                  -------------          -------------        ---------------         -------------
Increase (decrease) from shares
  of beneficial interest transactions:
  Class I .....................................     (13,839,314)           (28,739,464)           129,721,799           277,510,949
  Class R .....................................       1,962,273                203,378              8,168,446            11,195,628
                                                  -------------          -------------        ---------------         -------------
Net increase (decrease) from shares
  of beneficial interest
  transactions--Note 6 ........................     (11,877,041)           (28,536,086)           137,890,245           288,706,577
                                                  -------------          -------------        ---------------         -------------
    Total increase (decrease) .................       3,639,391            (23,297,976)           264,340,474           309,740,802
Net Assets:
  Beginning of year ...........................      70,071,935             93,369,911            851,272,924           541,532,122
                                                  -------------          -------------        ---------------         -------------
  End of year .................................   $  73,711,326          $  70,071,935        $ 1,115,613,398         $ 851,272,924
                                                  =============          =============        ===============         =============
Undistributed net investment income
  (accumulated loss) ..........................   $          --          $    (918,437)       $            --         $  (6,352,257)
                                                  =============          =============        ===============         =============





                                                                            -46-


THE ALGER INSTITUTIONAL FUNDS
STATEMENTS OF CHANGES IN NET ASSETS




                                                                Capital
                                                             Appreciation
                                                                 Fund
                                                  --------------------------------
                                                      For the             For the
                                                    Year Ended          Year Ended
                                                    October 31,         October 31,
                                                       2005                2004
                                                  ------------        ------------
                                                                
Net investment income (loss) ................     $     46,145        $ (1,322,488)
Net realized gain on investments ............       20,951,677          10,282,251
Net change in unrealized appreciation
  (depreciation) on investments .............        2,819,558          (8,886,695)
                                                  ------------        ------------
Net increase in net assets
  resulting from operations .................       23,817,380              73,068
                                                  ------------        ------------
Dividends and distributions to
  shareholders from:
  Net investment income
  Class I ...................................               --                  --
  Class R ...................................               --                  --
  Net realized gains
  Class I ...................................               --                  --
  Class R ...................................               --                  --
                                                  ------------        ------------
Total dividends and distributions to
  shareholders ..............................               --                  --
                                                  ------------        ------------
Increase (decrease) from shares of
  beneficial interest transactions:
  Class I ...................................      (19,901,503)        (35,772,587)
  Class R ...................................          208,163             659,615
                                                  ------------        ------------
Net increase (decrease) from shares
  of beneficial interest
  transactions--Note 6 ......................      (19,693,340)        (35,112,972)
                                                  ------------        ------------
    Total increase (decrease) ...............        4,124,040         (35,039,904)
Net Assets:
  Beginning of year .........................      125,594,935         160,634,839
                                                  ------------        ------------
  End of year ...............................     $129,718,975        $125,594,935
                                                  ============        ============
Undistributed net investment income
  (accumulated loss) ........................     $     46,145        $ (1,322,488)
                                                 =============       =============



                       See Notes to Financial Statements.



                                                                            -47-




                                                                                                            Socially
                                                                                                           Responsible
                                                              Balanced                                       Growth
                                                                Fund                                          Fund
                                                  ---------------------------------             --------------------------------
                                                   For the                 For the                For the               For the
                                                 Year Ended              Year Ended             Year Ended            Year Ended
                                                 October 31,             October 31,            October 31,           October 31,
                                                    2005                    2004                   2005                  2004
                                                  ----------             ----------             ----------            ----------
                                                                                                          
Net investment income (loss) ................     $   14,180             $    3,788             $   (5,952)           $  (14,986)
Net realized gain on investments ............        147,670                 45,169                209,975                62,678
Net change in unrealized appreciation
  (depreciation) on investments .............         (4,164)               (31,014)                85,690               (41,602)
                                                  ----------             ----------             ----------            ----------
Net increase in net assets
  resulting from operations .................        157,686                 17,943                289,713                 6,090
                                                  ----------             ----------             ----------            ----------
Dividends and distributions to
  shareholders from:
  Net investment income
  Class I ...................................        (12,752)                  (756)                    --                    --
  Class R ...................................         (1,011)                    --                     --                    --
  Net realized gains
  Class I ...................................        (35,778)                    --                (56,378)               (6,181)
  Class R ...................................         (4,123)                    --                 (7,512)                 (397)
                                                  ----------             ----------             ----------            ----------
Total dividends and distributions to
  shareholders ..............................        (53,664)                  (756)              (63,890)                (6,578)
                                                  ----------             ----------             ----------            ----------
Increase (decrease) from shares of
  beneficial interest transactions:
  Class I ...................................         20,615                 11,547                 34,899                   951
  Class R ...................................         23,053                105,281                214,520                40,664
                                                  ----------             ----------             ----------            ----------
Net increase (decrease) from shares
  of beneficial interest
  transactions--Note 6 ......................         43,668                116,828                249,419                41,615
                                                  ----------             ----------             ----------            ----------
    Total increase (decrease) ...............        147,690                134,015                475,242                41,127
Net Assets:
  Beginning of year .........................      1,600,692              1,466,677              1,384,416             1,343,289
                                                  ----------             ----------             ----------            ----------
  End of year ...............................     $1,748,382             $1,600,692             $1,859,658            $1,384,416
                                                  ==========             ==========             ==========            ==========
Undistributed net investment income
  (accumulated loss) ........................     $    7,357             $    1,274             $       --            $  (14,986)
                                                  ==========             ==========             ==========            ==========




                                                                            -48-
THE ALGER INSTITUTIONAL FUNDS
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD



                                                         Income from
                                                    Investment Operations
                                                   -------------------------
                                                                     Net
                                                                Realized and                            Net
                                         Net Asset     Net       Unrealized    Total    Distributions  Asset
                                          Value,    Investment      Gain       from         from       Value,
                                        Beginning     Income     (Loss) on   Investment  Net Realized  End of
                                        of Period  (Loss)(iii)  Investments  Operations     Gains      Period
                                        ---------  -----------  -----------  ----------  ------------  ------
                                                                                    
ALGER LARGECAP GROWTH INSTITUTIONAL FUND (i)

CLASS I
Year ended 10/31/05 ...................   $10.86     $ 0.04       $ 1.66      $ 1.70        $  --     $12.56
Year ended 10/31/04 ...................    10.71      (0.06)        0.21        0.15           --      10.86
Year ended 10/31/03 ...................     8.70      (0.03)        2.04        2.01           --      10.71
Year ended 10/31/02 ...................    11.63      (0.03)       (2.90)      (2.93)          --       8.70
Year ended 10/31/01 ...................    17.15      (0.03)       (4.50)      (4.53)       (0.99)     11.63

CLASS R
Year ended 10/31/05 ...................   $10.76     $(0.03)      $ 1.66      $ 1.63        $  --     $12.39
Year ended 10/31/04 ...................    10.66      (0.12)        0.22        0.10           --      10.76
From 1/27/03 to 10/31/03(ii)(iv) ......     8.12      (0.06)        2.60        2.54           --      10.66

ALGER SMALLCAP GROWTH INSTITUTIONAL FUND

CLASS I
Year ended 10/31/05 ...................   $16.07     $(0.14)      $ 4.04      $ 3.90        $  --     $19.97
Year ended 10/31/04 ...................    15.10      (0.16)        1.13        0.97           --      16.07
Year ended 10/31/03 ...................    10.97      (0.12)        4.25        4.13           --      15.10
Year ended 10/31/02 ...................    13.35      (0.13)       (2.25)      (2.38)          --      10.97
Year ended 10/31/01 ...................    23.78      (0.08)      (10.35)     (10.43)          --      13.35

CLASS R
Year ended 10/31/05 ...................   $15.93     $(0.22)      $ 4.03      $ 3.81        $  --     $19.74
Year ended 10/31/04 ...................    15.05      (0.25)        1.13        0.88           --      15.93
From 1/27/03 to 10/31/03(ii)(iv) ......    10.72      (0.14)        4.47        4.33           --      15.05

ALGER MIDCAP GROWTH INSTITUTIONAL FUND

CLASS I
Year ended 10/31/05 ...................   $15.38     $(0.11)      $ 2.55      $ 2.44       $(0.25)    $17.57
Year ended 10/31/04 ...................    14.78      (0.13)        0.73        0.60           --      15.38
Year ended 10/31/03 ...................    10.76      (0.11)        4.13        4.02           --      14.78
Year ended 10/31/02 ...................    13.34      (0.10)       (2.48)      (2.58)          --      10.76
Year ended 10/31/01 ...................    17.53      (0.08)       (3.44)      (3.52)       (0.67)     13.34

CLASS R
Year ended 10/31/05 ...................   $15.25     $(0.19)      $ 2.53      $ 2.34       $(0.25)    $17.34
Year ended 10/31/04 ...................    14.73      (0.21)        0.73        0.52           --      15.25
From 1/27/03 to 10/31/03(ii)(iv) ......    10.25      (0.14)        4.62        4.48           --      14.73





- ----------

(i)   Prior to March 1, 2002, the Alger LargeCap Growth Institutional Fund was
      the Alger Growth Retirement Portfolio.

(ii)  Commenced operations January 27, 2003.

(iii) Amount was computed based on average shares outstanding during the period.

(iv)  Ratios have been annualized; total return has not been annualized.

                       See Notes to Financial Statements.



                                                                            -49-




                                                                  Ratios/Supplemental Data
                                                       --------------------------------------------
                                                        Net       Ratio of  Ratio of Net
                                                       Assets,    Expenses  Investment
                                                       End of        to       Income
                                                       Period      Average   (Loss) to    Portfolio
                                             Total     (000's        Net      Average     Turnover
                                             Return    omitted)    Assets    Net Assets     Rate
                                             ------    --------   --------  ------------  ---------
                                                                            
ALGER LARGECAP GROWTH INSTITUTIONAL FUND (i)

CLASS I
Year ended 10/31/05 ...................      15.7%  $   86,725      1.08%      0.31%       249.06%
Year ended 10/31/04 ...................       1.4       88,098      1.13      (0.51)       191.48
Year ended 10/31/03 ...................      23.1       91,588      1.14      (0.31)       255.49
Year ended 10/31/02 ...................     (25.2)     108,660      1.14      (0.24)       202.07
Year ended 10/31/01 ...................     (27.5)      97,308      1.09      (0.20)        89.54

CLASS R
Year ended 10/31/05 ...................      15.2%  $    3,826      1.57%     (0.29)%      249.06%
Year ended 10/31/04 ...................       0.9        2,493      1.64      (1.05)       191.48
From 1/27/03 to 10/31/03(ii)(iv) ......      31.3          133      1.62      (0.84)       255.49

ALGER SMALLCAP GROWTH INSTITUTIONAL FUND

CLASS I
Year ended 10/31/05 ...................      24.3%  $   71,224      1.20%     (0.77)%      116.16%
Year ended 10/31/04 ...................       6.4       69,788      1.25      (1.03)       135.80
Year ended 10/31/03 ...................      37.7       93,300      1.24      (0.99)       139.97
Year ended 10/31/02 ...................     (17.8)      62,780      1.25      (1.01)       138.01
Year ended 10/31/01 ...................     (43.9)      86,790      1.19      (0.46)       191.89

CLASS R
Year ended 10/31/05 ...................      23.9%  $    2,487      1.68%     (1.20)%      116.16%
Year ended 10/31/04 ...................       5.8          284      1.75      (1.55)       135.80
From 1/27/03 to 10/31/03(ii)(iv) ......      40.4           70      1.74      (1.49)       139.97

ALGER MIDCAP GROWTH INSTITUTIONAL FUND

CLASS I
Year ended 10/31/05 ...................      16.0%  $1,093,486      1.10%     (0.64)%      237.74%
Year ended 10/31/04 ...................       4.1      839,273      1.15      (0.87)       190.93
Year ended 10/31/03 ...................      37.4      540,742      1.17      (0.89)       217.33
Year ended 10/31/02 ...................     (19.3)     215,727      1.17      (0.81)       284.69
Year ended 10/31/01 ...................     (20.6)     217,153      1.13      (0.51)       130.93

CLASS R
Year ended 10/31/05 ...................      15.4%  $   22,127      1.60%     (1.15)%      237.74%
Year ended 10/31/04 ...................       3.5       12,000      1.65      (1.37)       190.93
From 1/27/03 to 10/31/03(ii)(iv) ......      43.7          790      1.66      (1.40)       217.33





                                                                            -50-


THE ALGER INSTITUTIONAL FUNDS
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD



                                                         Income from
                                                     Investment Operations
                                                    ------------------------
                                                                     Net
                                                                 Realized and
                                        Net Asset        Net      Unrealized       Total       Dividends    Distributions
                                          Value,     Investment     Gain           from         from Net       from
                                        Beginning      Income    (Loss) on      Investment     Investment   Net Realized
                                        of Period   (Loss)(iii)  Investments    Operations       Income        Gains
                                        ---------   -----------  -----------    ----------     ----------   ------------
                                                                                            
ALGER CAPITAL APPRECIATION INSTITUTIONAL FUND

CLASS I
Year ended 10/31/05 ..................    $11.05     $    --        $2.23         $2.23         $   --        $   --
Year ended 10/31/04 ..................     11.06       (0.10)        0.09         (0.01)            --            --
Year ended 10/31/03 ..................      8.97       (0.06)        2.15          2.09             --            --
Year ended 10/31/02 ..................     11.66       (0.08)       (2.61)        (2.69)            --            --
Year ended 10/31/01 ..................     18.12       (0.03)       (6.37)        (6.40)            --         (0.06)

CLASS R
Year ended 10/31/05 ..................    $10.95     $ (0.06)       $2.20         $2.14         $   --        $   --
Year ended 10/31/04 ..................     11.01       (0.16)        0.10         (0.06)            --            --
From 1/27/03 to 10/31/03(ii)(iv) .....      8.36       (0.08)        2.73          2.65             --            --

ALGER BALANCED INSTITUTIONAL FUND

CLASS I
Year ended 10/31/05 ..................    $ 7.50     $  0.07        $0.67         $0.74         $(0.07)       $(0.18)
Year ended 10/31/04 ..................      7.41        0.02         0.07          0.09             --            --
Year ended 10/31/03 ..................      6.67       (0.01)        0.75          0.74             --            --
Year ended 10/31/02 ..................      8.20       (0.39)       (1.14)        (1.53)            --            --
From 12/4/00 to 10/31/01(i)(iv) ......     10.00       (0.11)       (1.69)        (1.80)            --            --

CLASS R
Year ended 10/31/05 ..................    $ 7.43     $  0.03        $0.67         $0.70         $(0.05)       $(0.18)
Year ended 10/31/04 ..................      7.38       (0.02)        0.07          0.05             --            --
From 1/27/03 to 10/31/03(ii)(iv) .....      6.43       (0.04)        0.99          0.95             --            --

ALGER SOCIALLY RESPONSIBLE GROWTH INSTITUTIONAL FUND

CLASS I
Year ended 10/31/05 ..................    $ 5.37     $ (0.01)       $1.05         $1.04         $   --        $(0.24)
Year ended 10/31/04 ..................      5.38       (0.05)        0.07          0.02             --         (0.03)
Year ended 10/31/03 ..................      4.43       (0.09)        1.04          0.95             --            --
Year ended 10/31/02 ..................      6.37       (0.77)       (1.17)        (1.94)            --            --
From 12/4/00 to 10/31/01(i)(iv) ......     10.00       (0.30)       (3.33)        (3.63)            --            --

CLASS R
Year ended 10/31/05 ..................    $ 5.34     $ (0.05)       $1.04         $0.99         $   --        $(0.24)
Year ended 10/31/04 ..................      5.37       (0.08)        0.08            --             --         (0.03)
From 1/27/03 to 10/31/03(ii)(iv) .....      4.13       (0.08)        1.32          1.24             --            --


- ----------
(i)    Commenced operations December 4, 2000.
(ii)   Commenced operations January 27, 2003.
(iii)  Amount was computed based on average shares outstanding during the
       period.
(iv)   Ratios have been annualized; total return has not been annualized.
(v)    Amount has been reduced by 1.01% due to expense reimbursement.
(vi)   Amount has been reduced by 0.80% due to expense reimbursement.
(vii)  Amount has been reduced by 1.00% due to expense reimbursement.
(viii) Amount has been reduced by 0.81% due to expense reimbursement.
(ix)   Amount has been reduced by 0.90% due to expense reimbursement.
(x)    Amount has been reduced by 0.75% due to expense reimbursement.
(xi)   Amount has been reduced by 0.94% due to expense reimbursement.
(xii)  Amount has been reduced by 0.73% due to expense reimbursement.

                       See Notes to Financial Statements.




                                                                            -51-




                                                                                           Ratios/Supplemental Data
                                                                              -----------------------------------------------
                                                                               Net       Ratio of    Ratio of Net
                                                            Net               Assets,    Expenses     Investment
                                                           Asset              End of        to          Income
                                                           Value,             Period      Average     (Loss) to     Portfolio
                                             Total         End of   Total     (000's        Net         Average     Turnover
                                          Distributions    Period   Return    omitted)     Assets      Net Assets     Rate
                                          -------------    ------   ------    --------    --------   ------------   ---------
                                                                                                
ALGER CAPITAL APPRECIATION INSTITUTIONAL FUND

CLASS I
Year ended 10/31/05 ..................      $   --         $13.28    20.2%    $128,646      1.17%         0.04%      148.91%
Year ended 10/31/04 ..................          --          11.05    (0.1)     124,889      1.23         (0.87)      160.00
Year ended 10/31/03 ..................          --          11.06    23.3      160,569      1.23         (0.59)      187.72
Year ended 10/31/02 ..................          --           8.97   (23.1)     132,010      1.23         (0.73)      180.39
Year ended 10/31/01 ..................       (0.06)         11.66   (35.4)     187,187      1.18         (0.21)      104.17

CLASS R
Year ended 10/31/05 ..................      $   --         $13.09    19.5%    $  1,073      1.67%        (0.51)%     148.91%
Year ended 10/31/04 ..................          --          10.95    (0.5)         706      1.73         (1.39)      160.00
From 1/27/03 to 10/31/03(ii)(iv) .....          --          11.01    31.7           66      1.72         (1.01)      187.72

ALGER BALANCED INSTITUTIONAL FUND

CLASS I
Year ended 10/31/05 ..................      $(0.25)        $ 7.99    10.1%    $  1,548      1.25%(vi)     0.90%      211.26%
Year ended 10/31/04 ..................          --           7.50     1.3        1,435      1.35(v)       0.28       184.21
Year ended 10/31/03 ..................          --           7.41    11.1        1,409      2.00         (0.15)      149.42
Year ended 10/31/02 ..................          --           6.67   (18.7)         225      6.72         (5.21)      321.89
From 12/4/00 to 10/31/01(i)(iv) ......          --           8.20   (18.0)         108      3.13         (1.44)       15.99

CLASS R
Year ended 10/31/05 ..................      $(0.23)        $ 7.90     9.6%    $    200      1.75%(viii)  (0.38)%     211.26%
Year ended 10/31/04 ..................          --           7.43     0.7          166      1.82(vii)    (0.28)      184.21
From 1/27/03 to 10/31/03(ii)(iv) .....          --           7.38    14.8           58      2.56         (0.74)      149.42

ALGER SOCIALLY RESPONSIBLE GROWTH INSTITUTIONAL FUND

CLASS I
Year ended 10/31/05 ..................      $(0.24)        $ 6.17    19.8%    $  1,505      1.25%(x)   (0.25)%      152.60%
Year ended 10/31/04 ..................       (0.03)          5.37     0.3        1,277      1.34(ix)   (1.04)       166.03
Year ended 10/31/03 ..................          --           5.38    21.4        1,277      2.26       (1.69)       187.82
Year ended 10/31/02 ..................          --           4.43   (30.5)          46     13.48      (13.17)       205.83
From 12/4/00 to 10/31/01(i)(iv) ......          --           6.37   (36.3)          77      5.31       (4.75)       114.33

CLASS R
Year ended 10/31/05 ..................      $(0.24)        $ 6.09    18.9%    $    355      1.75%(xii) (0.97)%      152.60%
Year ended 10/31/04 ..................       (0.03)          5.34    (0.1)         107      1.83(xi)   (1.53)       166.03
From 1/27/03 to 10/31/03(ii)(iv) .....          --           5.37    30.0           66      2.92       (2.29)       187.82




                                                                            -52-


THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS

NOTE 1--GENERAL:

      The Alger Institutional Funds (formerly The Alger Institutional Fund) (the
"Trust"), is a diversified,  open-end registered investment company organized as
a business trust under the laws of the Commonwealth of Massachusetts.  The Trust
operates as a series company and currently  issues an unlimited number of shares
of beneficial interest in six funds--LargeCap Growth Fund, SmallCap Growth Fund,
MidCap  Growth  Fund,  Capital  Appreciation  Fund,  Balanced  Fund and Socially
Responsible Growth Fund (the "Funds").  Prior to February 28, 2004, the LargeCap
Growth Fund was the LargeCap Growth Portfolio,  the SmallCap Growth Fund was the
Small Cap Portfolio, the MidCap Growth Fund was the MidCap Growth Portfolio, the
Capital Appreciation Fund was the Capital Appreciation  Portfolio,  the Balanced
Fund was the Balanced Portfolio and the Socially Responsible Growth Fund was the
Socially Responsible Growth Portfolio. The LargeCap Growth Fund, SmallCap Growth
Fund, MidCap Growth Fund,  Capital  Appreciation  Fund and Socially  Responsible
Growth Fund  normally  invest  primarily  in equity  securities  and each has an
investment  objective of long-term  capital  appreciation.  The Balanced  Fund's
investment  objectives  are current  income and long-term  capital  appreciation
which  it seeks  to  achieve  through  investing  in  equity  and  fixed  income
securities.

      Each Fund  offers  Class I and Class R shares.  Class R shares  were first
offered January 27, 2003. Each class has identical rights to assets and earnings
except that only Class R shares have a plan of distribution and bear the related
expenses.

NOTE 2--SIGNIFICANT ACCOUNTING POLICIES:

(a)  INVESTMENT  VALUATION:  Investments of the Funds are valued on each day the
New  York  Stock  Exchange  (the  "NYSE")  is open as of the  close  of the NYSE
(currently 4:00 p.m. Eastern time). Listed securities for which such information
is  regularly  reported are valued at the last  reported  sales price or, in the
absence of reported  sales,  at the mean  between the bid and asked price or, in
the absence of a recent bid or asked price,  the equivalent as obtained from one
or more of the major market makers for the  securities to be valued.  Securities
included within the Nasdaq market shall be valued at the Nasdaq official closing
price (NOCP) on the day of valuation, or if there be no NOCP issued, at the last
sale price on such day.  Securities  included within the Nasdaq market for which
there is no NOCP and no last sale price on the day of valuation  shall be valued
at the mean between the last bid and asked prices on such day.

      Securities  for which  market  quotations  are not readily  available  are
valued at fair  value,  as  determined  in good  faith  pursuant  to  procedures
established by the Board of Trustees.





                                                                            -53-


THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

      Short-term  securities  having a remaining  maturity of sixty days or less
are valued at amortized cost which approximates  market value.  Shares of mutual
funds are  valued at the net asset  value of the  underlying  mutual  fund.

(b) SECURITIES  TRANSACTIONS AND INVESTMENT INCOME:  Securities transactions are
recorded  on a trade  date  basis.  Realized  gains and losses  from  securities
transactions  are  recorded on the  identified  cost basis.  Dividend  income is
recognized  on the  ex-dividend  date and interest  income is  recognized on the
accrual basis.

      Premiums  and  discounts on debt  securities  purchased  are  amortized or
accreted over the lives of the respective securities.

(c)  REPURCHASE  AGREEMENTS:  The Funds enter into  repurchase  agreements  with
approved  institutions.  The repurchase  agreements are  collateralized  by U.S.
Government securities, which are either received and held in physical possession
by the custodian or received by such  custodian in  book-entry  form through the
Federal  Reserve  book-entry  system.  The collateral is valued on a daily basis
during the term of the  agreement to ensure that its value equals or exceeds the
agreed-upon repurchase price to be repaid to the Funds. Additional collateral is
obtained  when  necessary.

(d) LENDING OF FUND SECURITIES: The Funds may lend their securities to financial
institutions,  provided that the market value of the securities  loaned will not
at any time exceed one third of a Fund's  total  assets,  as defined.  The Funds
earn fees on the  securities  loaned.  In order to protect  against  the risk of
failure  by the  borrower  to return the  securities  loaned or any delay in the
delivery of such  securities,  the loan is  collateralized  by cash,  letters of
credit or U.S.  Government  securities that are maintained in an amount equal to
at least 100 percent of the current market value of the loaned  securities.  The
market value of the loaned  securities is determined at the close of business of
the Funds and any required  additional  collateral  is delivered to the Funds on
the next business day. As of October 31, 2005, there were no securities on loan.

(e) DIVIDENDS TO SHAREHOLDERS: Dividends payable to shareholders are recorded on
the ex-dividend  date. With respect to all Funds,  dividends from net investment
income  and  distributions  from net  realized  gains,  offset by any loss carry
forward,  are  declared  and paid  annually  after the end of the fiscal year in
which earned.

      Each class is treated  separately in determining  the amounts of dividends
of net investment income payable to holders of its shares.

      The  characterization  of  distributions  to  shareholders  for  financial
reporting  purposes is determined in accordance  with federal  income tax rules.
Therefore,  the  source  of  the  Funds'  distributions  may  be  shown  in  the
accompanying financial statements as either from, or in excess of net investment
income,  net  realized  gain on  investment  transactions  or return of capital,
depending on the type of book/tax  differences that may exist.  Capital accounts
within the




                                                                            -54-
THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

financial   statements   are  adjusted  for  permanent   book/tax   differences.
Reclassifications  result primarily from the differences in tax treatment of net
operating   losses  and  amortization   adjustments  on  debt  securities.   The
reclassifications  had no impact  on the net  asset  values of the Funds and are
designed to present the Funds' capital accounts on a tax basis.

(f)  FEDERAL  INCOME  TAXES:  It is  each  Fund's  policy  to  comply  with  the
requirements  of the Internal  Revenue Code  applicable to regulated  investment
companies and to distribute all of its investment  company taxable income to its
shareholders.  Provided a Fund maintains such compliance,  no federal income tax
provision is required. Each Fund is treated as a separate entity for the purpose
of determining such compliance.

(g)  ALLOCATION   METHODS:   The  Trust  accounts  separately  for  the  assets,
liabilities and operations of each Fund. Expenses directly  attributable to each
Fund are charged to that Fund's operations; expenses which are applicable to all
Funds are  allocated  among  them  based on net  assets.  Income,  realized  and
unrealized gains and losses,  and expenses of each Fund, are allocated among the
Fund's classes based on relative net assets,  with the exception of distribution
fees, which are only applicable to Class R shares.

(h)  INDEMNIFICATION:  The Trust enters into contracts that contain a variety of
indemnification   provisions.   The  Trust's   maximum   exposure   under  these
arrangements  is unknown.  The Trust does not  anticipate  recognizing  any loss
related to these arrangements.

(i) OTHER:  These  financial  statements  have been prepared using estimates and
assumptions that affect the reported amounts therein.  Actual results may differ
from those estimates.

NOTE 3--INVESTMENT MANAGEMENT FEES AND OTHER TRANSACTIONS WITH AFFILIATES:

(a)  INVESTMENT  MANAGEMENT  FEES:  Fees incurred by each Fund,  pursuant to the
provisions of its Investment  Management  Agreement with Fred Alger  Management,
Inc.  ("Alger  Management"),  are payable  monthly and are computed based on the
value of the  average  daily net  assets of each  Fund at the  following  annual
rates:

LargeCap Growth Fund .............................   .75%
SmallCap Growth Fund .............................   .85
MidCap Growth Fund ...............................   .80
Capital Appreciation Fund ........................   .85
Balanced Fund ....................................   .75
Socially Responsible Growth Fund .................   .75

      Alger  Management has established an expense cap for the Balanced Fund and
the Socially  Responsible  Growth Fund effective March 1, 2004. Alger Management
will reimburse  these Funds if annualized  operating  expenses  exceed 1.25% and
1.75% for Class I Shares and Class R Shares, respectively,




                                                                            -55-
THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

of  average  daily net  assets.  For the year  ended  October  31,  2005,  Alger
Management reimbursed the Balanced Fund and the Socially Responsible Growth Fund
$13,482 and $12,294, respectively.

(b)  DISTRIBUTION  FEES:  Class R Shares--The  Funds have adopted a Distribution
Plan  pursuant  to which  Class R shares of each Fund pays Fred Alger & Company,
Incorporated,  the Trust's  distributor (the  "Distributor") and an affiliate of
Alger  Management,  a fee at the annual rate of .50% of the  respective  average
daily net assets of the Class R shares of the designated Funds to compensate the
Distributor for its activities and expenses incurred in distributing the Class R
shares.  The fees charged may be more or less than the expenses  incurred by the
Distributor.

(c) BROKERAGE COMMISSIONS:  During the year ended October 31, 2005, the LargeCap
Growth Fund,  the  SmallCap  Growth Fund,  the MidCap  Growth Fund,  the Capital
Appreciation  Fund, the Balanced Fund and the Socially  Responsible  Growth Fund
paid the Distributor  commissions of $363,357,  $90,754,  $2,928,917,  $240,632,
$4,186 and $3,111, respectively, in connection with securities transactions.

(d) TRANSFER AGENT FEES: Alger Shareholder Services, Inc. ("Alger Services"), an
affiliate of Alger  Management,  serves as transfer agent for the Trust.  During
the year ended October 31, 2005, the LargeCap  Growth Fund, the Small Cap Growth
Fund, the MidCap Growth Fund, the Capital  Appreciation  Fund, the Balanced Fund
and the  Socially  Responsible  Growth  Fund  incurred  fees of $3,840,  $3,084,
$37,195,  $5,321,  $67 and $60,  respectively,  for  services  provided by Alger
Services.  Effective  November  22, 2004,  State  Street Bank and Trust  Company
replaced Alger Services as the Funds'  transfer  agent.  Transfer agent services
are  provided  by  State  Street  Bank and  Trust  Company's  affiliate,  Boston
Financial Data Services, Inc. ("BFDS").

Effective   February  28,  2005,  the  Trust  has  entered  into  a  shareholder
administrative  services  agreement  with Alger  Services  to  compensate  Alger
Services on a per account  basis for its  liaison and  administrative  oversight
ofBFDSand related services. During the year ended October 31, 2005, the LargeCap
Growth Fund,  the  SmallCap  Growth Fund,  the MidCap  Growth Fund,  the Capital
Appreciation  Fund, the Balanced Fund, and the Socially  Responsible Growth Fund
incurred fees of $195,  $1,044,  $3,026,  $420, $10 and $45,  respectively,  for
these  services  provided  by  Alger  Services.

(e) OTHER  TRANSACTIONS  WITH  AFFILIATES:  Certain trustees and officers of the
Trust are directors and officers of Alger Management,  the Distributor and Alger
Services.  At October 31, 2005,  Alger Management and its affiliates owned 7,330
shares,  4,815 shares,  8,200 shares,  7,349 shares,  177,646 shares and 243,785
shares of the LargeCap  Growth Fund, the SmallCap Growth Fund, the MidCap Growth
Fund,  the  Capital  Appreciation  Fund,  the  Balanced  Fund  and the  Socially
Responsible Growth Fund, respectively.





                                                                            -56-
THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

NOTE 4--SECURITIES TRANSACTIONS:

      The following  summarizes the securities  transactions by the Funds, other
than short-term securities, for the year ended October 31, 2005:

                                                  PURCHASES            SALES
                                                  ---------            -----

LargeCap Growth Fund ........................ $   231,818,216    $   246,984,629
SmallCap Growth Fund ........................      74,940,925         92,368,104
MidCap Growth Fund ..........................   2,362,919,009      2,277,148,306
Capital Appreciation Fund ...................     186,251,197        205,865,199
Balanced Fund ...............................       3,423,630          3,388,370
Socially Responsible Growth Fund ............       2,607,492          2,329,033

NOTE 5--LINES OF CREDIT:

      The Trust has both committed and  uncommitted  lines of credit with banks.
All borrowings have variable interest rates and are payable on demand.  With the
exception of the Capital  Appreciation  Fund, the Trust borrows under such lines
of credit exclusively for temporary or emergency purposes.

      The  Capital  Appreciation  Fund may  borrow up to 1/3 of the value of its
assets, as defined, to purchase additional securities. To the extent the Capital
Appreciation  Fund borrows under these lines,  it must pledge  securities with a
total value of at least twice the amount  borrowed.  For the year ended  October
31, 2005, the Funds had the following borrowings:

                                                   AVERAGE      WEIGHTED AVERAGE
                                                  BORROWING       INTEREST RATE
                                                 -----------    ----------------

LargeCap Growth Fund ........................     $  73,808           4.17%
SmallCap Growth Fund ........................       107,425           2.98
Capital Appreciation Fund ...................        22,288           2.72

NOTE 6--SHARE CAPITAL:

      The  Trust has an  unlimited  number of  authorized  shares of  beneficial
interest of $.001 par value which are  presently  divided into six series.  Each
series is divided into two separate classes.





                                                                            -57-


THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

      During  the year  ended  October  31,  2005,  transactions  of  shares  of
beneficial interest were as follows:

                                                     SHARES           AMOUNT
                                                     ------           ------
LargeCap Growth Fund
 Class I
  Shares sold ................................      2,200,355      $ 26,022,349
  Shares redeemed ............................     (3,411,580)      (40,911,341)
                                                  -----------      ------------
  Net decrease ...............................     (1,211,225)     $(14,888,992)
                                                  ===========      ============
 Class R
  Shares sold ................................        154,719      $  1,781,735
  Shares redeemed ............................        (77,595)         (910,234)
                                                  -----------      ------------
  Net increase ...............................         77,124      $    871,501
                                                  ===========      ============
SmallCap Growth Fund
 Class I
  Shares sold ................................      1,548,513      $ 28,225,343
  Shares redeemed ............................     (2,325,174)      (42,064,657)
                                                  -----------      ------------
  Net decrease ...............................       (776,661)     $(13,839,314)
                                                  ===========      ============
 Class R
  Shares sold ................................        153,157      $  2,767,356
  Shares redeemed ............................        (44,954)         (805,083)
                                                  -----------      ------------
  Net increase ...............................        108,203      $  1,962,273
                                                  ===========      ============
MidCap Growth Fund
 Class I
  Shares sold ................................     23,802,074      $401,271,219
  Dividends reinvested .......................        843,221        14,005,908
  Shares redeemed ............................    (16,996,823)     (285,555,328)
                                                  -----------      ------------
  Net increase ...............................      7,648,472      $129,721,799
                                                  ===========      ============
 Class R
  Shares sold ................................        904,309      $ 15,093,802
  Dividends reinvested .......................         13,818           227,446
  Shares redeemed ............................       (428,734)       (7,152,802)
                                                  -----------      ------------
  Net increase ...............................        489,393      $  8,168,446
                                                  ===========      ============
Capital Appreciation Fund
 Class I
  Shares sold ................................      2,623,699      $ 32,136,928
  Shares redeemed ............................     (4,237,300)      (52,038,431)
                                                  -----------      ------------
  Net decrease ...............................     (1,613,601)     $(19,901,503)
                                                  ===========      ============
 Class R
  Shares sold ................................         40,879      $    488,568
  Shares redeemed ............................        (23,401)         (280,405)
                                                  -----------      ------------
  Net increase ...............................         17,478      $    208,163
                                                  ===========      ============




                                                                            -58-

THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

                                                   SHARES             AMOUNT
                                                   ------             ------

Balanced Fund
 Class I

   Shares sold ...........................             9,813       $     75,364
   Dividends reinvested ..................             5,423             41,217
   Shares redeemed .......................           (12,703)           (95,966)
                                                ------------       ------------
   Net increase ..........................             2,533       $     20,615
                                                ============       ============
 Class R

   Shares sold ...........................             3,179       $     24,043
   Dividends reinvested ..................               685              5,169
   Shares redeemed .......................              (818)            (6,159)
                                                ------------       ------------
   Net increase ..........................             3,046       $     23,053
                                                ============       ============
Socially Responsible Growth Fund
 Class I

   Shares sold ...........................                50       $        288
   Dividends reinvested ..................             9,429             52,611
   Shares redeemed .......................            (3,205)           (18,000)
                                                ------------       ------------
   Net increase ..........................             6,274       $     34,899
                                                ============       ============
 Class R

   Shares sold ...........................            39,735       $    223,738
   Dividends reinvested ..................             1,012              5,594
   Shares redeemed .......................            (2,544)           (14,812)
                                                ------------       ------------
   Net increase ..........................            38,203       $    214,520
                                                ============       ============

      During  the year  ended  October  31,  2004,  transactions  of  shares  of
beneficial interest were as follows:

LargeCap Growth Fund
 Class I

   Shares sold ...........................         3,182,162       $ 35,531,451
   Shares redeemed .......................        (3,622,713)       (40,424,440)
                                                ------------       ------------
   Net decrease ..........................          (440,551)      $ (4,892,989)
                                                ============       ============
 Class R

   Shares sold ...........................           262,650       $  2,902,113
   Shares redeemed .......................           (43,434)          (478,582)
                                                ------------       ------------
   Net increase ..........................           219,216       $  2,423,531
                                                ============       ============
SmallCap Growth Fund
 Class I

   Shares sold ...........................         2,187,748       $ 35,342,244
   Shares redeemed .......................        (4,022,745)       (64,081,708)
                                                ------------       ------------
   Net decrease ..........................        (1,834,997)      $(28,739,464)
                                                ============       ============
 Class R

   Shares sold ...........................            21,118       $    328,354
   Shares redeemed .......................            (7,987)          (124,976)
                                                ------------       ------------
   Net increase ..........................            13,131       $    203,378
                                                ============       ============


                                                                            -59-

THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

                                                   SHARES            AMOUNT
                                                  --------          --------
MidCap Growth Fund
 Class I

   Shares sold ...........................        34,583,348      $ 531,972,510
   Shares redeemed .......................       (16,573,777)      (254,461,561)
                                               -------------      -------------
   Net increase ..........................        18,009,571      $ 277,510,949
                                               =============      =============
 Class R

   Shares sold ...........................           936,539      $  14,301,063
   Shares redeemed .......................          (203,152)        (3,105,435)
                                               -------------      -------------
   Net increase ..........................           733,387      $  11,195,628
                                               =============      =============
Capital Appreciation Fund
 Class I

   Shares sold ...........................         5,719,480      $  65,521,012
   Shares redeemed .......................        (8,939,452)      (101,293,599)
                                               -------------      -------------
   Net decrease ..........................        (3,219,972)     $ (35,772,587)
                                               =============      =============
 Class R

   Shares sold ...........................            72,246      $     816,970
   Shares redeemed .......................           (13,789)          (157,355)
                                               -------------      -------------
   Net increase ..........................            58,457      $     659,615
                                               =============      =============
Balanced Fund
 Class I

   Shares sold ...........................            12,405      $      93,926
   Dividends reinvested ..................               100                756
   Shares redeemed .......................           (11,277)           (83,135)
                                               -------------      -------------
   Net increase ..........................             1,228      $      11,547
                                               =============      =============
 Class R

   Shares sold ...........................            14,498      $     105,281
   Shares redeemed .......................                --                 --
                                               -------------      -------------
   Net increase ..........................            14,498      $     105,281
                                               =============      =============
Socially Responsible Growth Fund
 Class I

   Shares sold ...........................               632      $       3,477
   Dividends reinvested ..................             1,124              6,014
   Shares redeemed .......................            (1,613)            (8,540)
                                               -------------      -------------
   Net increase ..........................               143      $         951
                                               =============      =============
 Class R

   Shares sold ...........................             9,021      $      47,809
   Dividends reinvested ..................                74                398
   Shares redeemed .......................            (1,400)            (7,543)
                                               -------------      -------------
   Net increase ..........................             7,695      $      40,664
                                               =============      =============


                                                                            -60-

THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

NOTE 7--DISTRIBUTIONS TO SHAREHOLDERS:

      Distributions  paid by the Funds  during the year ended  October 31, 2004,
consisted  entirely of ordinary income.  The tax character of distributions paid
during the year ended  October  31,  2005 were as  follows:

MidCap  Growth Fund
Distributions paid from:
  Ordinary income ........................................           $        --
  Long-term capital gain .................................            14,306,365
                                                                     -----------
  Total distributions paid ...............................           $14,306,365
                                                                     ===========
Balanced Fund
Distributions paid from:
  Ordinary income ........................................           $    18,724
  Long-term capital gain .................................                34,940
                                                                     -----------
  Total distributions paid ...............................           $    53,664
                                                                     ===========
Socially Responsible Growth Fund
Distributions paid from:
  Ordinary income ........................................           $        --
  Long-term capital gain .................................                63,890
                                                                     -----------
  Total distributions paid ...............................                63,890
                                                                     ===========

      As of October 31, 2005, the components of distributable  earnings on a tax
basis were as follows:

LargeCap Growth Fund
  Undistributed ordinary income ..........................           $   274,397
  Undistributed long-term gain ...........................                    --
  Unrealized appreciation ................................             5,192,206

SmallCap Growth Fund
  Undistributed ordinary income ..........................                    --
  Undistributed long-term gain ...........................                    --
  Unrealized appreciation ................................           $ 8,071,398

MidCap Growth Fund
  Undistributed ordinary income ..........................           $93,048,523
  Undistributed long-term gain ...........................            30,201,163
  Unrealized appreciation ................................            64,842,423

Capital Appreciation Fund
  Undistributed ordinary income ..........................           $    46,145
  Undistributed long-term gain ...........................                    --
  Unrealized appreciation ................................            14,365,786


                                                                            -61-

THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

Balanced Fund
  Undistributed ordinary income ...................................... $112,638
  Undistributed long-term gain .......................................   30,499
  Unrealized appreciation ............................................   63,427

Socially Responsible Growth Fund
  Undistributed ordinary income ...................................... $144,418
  Undistributed long-term gain .......................................   58,766
  Unrealized appreciation ............................................  206,878

      The differences  between book basis and tax basis unrealized  appreciation
is attributable primarily to the tax deferral of losses on wash sales.

      At October 31,  2005,  the Funds,  for federal  income tax  purposes,  had
capital loss  carryforwards  which expire as set forth in the table below. These
amounts may be applied  against  future net realized  gains until the earlier of
their utilization or expiration.

                              LARGECAP          SMALLCAP          CAPITAL
                               GROWTH            GROWTH         APPRECIATION
EXPIRATION DATE                 FUND              FUND              FUND
                            ------------      ------------      ------------
2009                        $         --      $ 50,188,693      $ 56,066,260
2010                          19,289,047        12,342,837        46,484,857
2011                           5,070,663                --                --
                            ------------      ------------      ------------
                            $ 24,359,710      $ 62,531,530      $102,551,117
                            ============      ============      ============

NOTE 8--LITIGATION:

      Alger  Management  has responded to inquiries,  document  requests  and/or
subpoenas from regulatory  authorities,  including the United States  Securities
and  Exchange  Commission  ("SEC"),  the Office of the New York  State  Attorney
General,  the Attorney General of New Jersey,  and the West Virginia  Securities
Commissioner, in connection with their investigations of practices in the mutual
fund industry identified as "market timing" and "late trading."

      On December 16, 2005, Alger Management  received from the staff of the SEC
a "Wells  Notice" which  indicated  that the staff intends to recommend that the
Commission bring civil enforcement action for possible violations of the federal
securities  laws.  "Wells  Notices"  also have been  sent to  certain  companies
affiliated with Alger Management,  as well as certain present and former members
of its senior management. The Wells Notices arose out of the SEC's staff ongoing
investigation  of market  timing and late  trading  practices in the mutual fund
industry.  Alger  Management and the other  recipients  have the  opportunity to
respond  to the staff  before  the staff  makes a formal  recommendation.  Alger
Management plans to send a Wells submission to the staff in January 2006.

      On August 31, 2005,  the West Virginia  Securities  Commissioner  in an ex
parte Summary Order to Cease and Desist and Notice of Right to Hearing con-


                                                                            -62-

THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

cluded that Alger  Management  and Alger Inc.  had  violated  the West  Virginia
Uniform Securities Act, and ordered Alger Management and Alger Inc. to cease and
desist from  further  violations  of the Act by  engaging  in the  market-timing
related  conduct  described in the order.  The ex parte order provided notice of
their right to a hearing with respect to the  violations  of law asserted by the
Commissioner.  Other firms  unaffiliated  with Alger Management were served with
similar orders.  Alger Management and Alger Inc. intend to request a hearing for
the purpose of seeking to vacate or modify the order.

      In  addition,  in 2003  and  2004  several  purported  class  actions  and
shareholder  derivative  suits were filed against  various parties in the mutual
fund industry, including Alger Management, certain mutual funds managed by Alger
Management  (the "Alger  Mutual  Funds"),  and certain  current and former Alger
Mutual  Fund  trustees  and  officers,  alleging  wrongful  conduct  related  to
market-timing  and  late-trading by mutual fund  shareholders.  These cases were
transferred  to the U.S.  District  Court of Maryland by the  Judicial  Panel on
Multidistrict  Litigation for consolidated pre-trial  proceedings.  In September
2004,  consolidated  amended complaints  involving these cases -- a Consolidated
Amended  Fund  Derivative   Complaint  (the  "Derivative   Complaint")  and  two
substantially  identical Consolidated Amended Class Action Complaints (together,
the "Class Action  Complaint")  -- were filed in the Maryland  federal  district
court under the  caption  number  1:04-MD-15863  (JFM).  In April 2005,  a civil
lawsuit  involving  similar  allegations was filed by the West Virginia Attorney
General and also transferred to the Maryland District Court.

      The Derivative Complaint alleged (i) violations,  by Alger Management and,
depending on the specific offense alleged, by its immediate parent,  Alger Inc.,
which is the  Distributor  of the Alger  Mutual  Funds,  and/or the fund trustee
defendants,  of Sections 36(a),  36(b), 47, and 48 of the Investment Company Act
of 1940  (the  "Investment  Company  Act")  and of  Sections  206 and 215 of the
Investment  Advisers  Act of 1940,  breach  of  fiduciary  duty,  and  breach of
contract,  (ii)  various  offenses by other  third-party  defendants,  and (iii)
unjust  enrichment  by all the  named  defendants.  The Class  Action  Complaint
alleged,  in addition to the offenses  listed above,  (i)  violations,  by Alger
Management, Alger Inc., their affiliates, the funds named as defendants, and the
current and former fund trustees and officers, of Sections 11, 12(a)(2),  and 15
of the Securities Act of 1933,  Sections 10(b) (and Rule 10b-5  thereunder)  and
20(a) of the Securities Exchange Act of 1934 (the "1934 Act"), and Section 34(b)
of the  Investment  Company  Act of 1940,  (ii)  breach of contract by the funds
named as defendants,  and (iii) unjust  enrichment of the  defendants.  The West
Virginia  attorney  general action also alleges  violations of the West Virginia
Consumer Credit and Protection Act and other wrongful conduct.

      Motions to dismiss the Class Action Complaint and the Derivative Complaint



                                                                            -63-

THE ALGER INSTITUTIONAL FUNDS
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

were subsequently  filed. On November 3, 2005, the district court dismissed both
complaints  in their  entirety  with  respect  to the  Alger  Mutual  Funds  and
dismissed all claims  against the other Alger  defendants  other than the claims
under the 1934 Act and Section 36(b) of the  Investment  Company Act, with leave
to the  class  action  plaintiffs  to  file  amended  complaints  against  those
defendants with respect to claims under state law. It is anticipated that orders
implementing  the rulings  will be entered in or about  January  2006,  and that
motions for reconsideration  will thereafter be filed.

      Alger  Management  does  not  believe  that the  Alger  Mutual  Funds  are
themselves  targets of the regulatory  investigations  as potential  enforcement
defendants.

      The SEC and, in some cases, state government authorities have a variety of
administrative  and  civil  enforcement  powers,  including  injunctive  powers,
authority  to assess fines and  penalties  and order  restitution,  authority to
limit the activities of a person or company and other enforcement  powers,  that
may be exercised administratively or through the courts.

      Under  Section 9(a) of the  Investment  Company Act, if any of the various
regulatory  proceedings or lawsuits were to result in a court injunction against
Alger  Management  or Alger  Inc.,  Alger  Management  would,  in the absence of
exemptive  relief  granted by the SEC,  be barred  from  serving  as  investment
adviser/sub-adviser  for any registered investment company,  including the Fund.
While  exemptive  relief from  Section  9(a) has been  granted in certain  other
cases,  there is no  assurance  that such  exemptive  relief would be granted if
sought. In addition, it is possible that these matters and/or other developments
resulting from these matters could result in loss of Alger Management personnel,
diversion of time and attention of Alger Management  personnel,  diminishment of
financial  resources  of Alger  Management,  or other  consequences  potentially
adverse to the Fund.  Alger  Management  cannot predict the potential  effect of
such actions upon Alger  Management or the Fund.  There can be no assurance that
the effect, if any, would not be material.


                                                                            -64-

             REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Trustees of
  The Alger Institutional Funds:

      We have audited the  accompanying  statements  of assets and  liabilities,
including  the  schedules  of  investments,  of The  Alger  Institutional  Funds
(comprising the LargeCap Growth  Institutional,  SmallCap Growth  Institutional,
MidCap  Growth  Institutional,  Capital  Appreciation  Institutional,   Balanced
Institutional,    and   Socially   Responsible   Growth   Institutional   Funds)
(collectively,  the "Funds"), as of October 31, 2005, and the related statements
of operations  for the year then ended,  the statements of changes in net assets
for each of the two years in the period then ended, and the financial highlights
for each of the four years in the period then ended. These financial  statements
and financial  highlights are the responsibility of the Funds'  management.  Our
responsibility  is to  express  an opinion  on these  financial  statements  and
financial  highlights based on our audits. The financial highlights for the year
ended  October 31, 2001 were  audited by other  auditors,  whose  report,  dated
November  30,  2001,   expressed  an  unqualified  opinion  on  those  financial
highlights.

      We conducted  our audits in  accordance  with the  standards of the Public
Company Accounting Oversight Board (United States). Those standards require that
we plan and perform the audit to obtain  reasonable  assurance about whether the
financial statements and financial highlights are free of material misstatement.
We were not  engaged to perform an audit of the  Funds'  internal  control  over
financial reporting.  Our audits included consideration of internal control over
financial  reporting  as  a  basis  for  designing  audit  procedures  that  are
appropriate  in the  circumstances,  but not for the  purpose of  expressing  an
opinion on the  effectiveness  of the Funds'  internal  control  over  financial
reporting.  Accordingly,  we express  no such  opinion.  An audit also  includes
examining,  on a test basis,  evidence supporting the amounts and disclosures in
the financial  statements  and financial  highlights,  assessing the  accounting
principles used and significant estimates made by management, and evaluating the
overall financial statement  presentation.  Our procedures included confirmation
of securities  owned as of October 31, 2005, by  correspondence  with custodians
and  brokers.  We believe  that our audits  provide a  reasonable  basis for our
opinion.

      In our opinion, the financial statements and financial highlights referred
to above,  and audited by us,  present  fairly,  in all material  respects,  the
financial  position of The Alger  Institutional  Funds at October 31, 2005,  the
results of its operations for the year then ended, the changes in its net assets
for each of the two years in the period then ended, and the financial highlights
for each of the four years in the period then  ended,  in  conformity  with U.S.
generally accepted accounting principles.


                                                  /s/ Ernst & Young LLP

December 12, 2005


                                                                            -65-

THE ALGER INSTITUTIONAL FUNDS
ADDITIONAL INFORMATION (UNAUDITED)

SHAREHOLDER EXPENSE EXAMPLE (UNAUDITED)

      As a shareholder  of the Fund,  you incur two types of costs:  transaction
costs, if applicable, and ongoing costs, including management fees, distribution
(12b-1) fees, if applicable,  and other fund expenses.  This example is intended
to help you understand  your ongoing costs (in dollars) of investing in the Fund
and to compare  these costs with the ongoing  costs of investing in other mutual
funds.

      The  example  below is based on an  investment  of $1,000  invested at the
beginning of the six-month  period  starting May 1, 2005 and ending  October 31,
2005.

ACTUAL EXPENSES

      The  first  line for each  class of shares  in the  table  below  provides
information  about actual  account values and actual  expenses.  You may use the
information in this line, together with the amount you invested, to estimate the
expenses  that you would have paid over the period.  Simply  divide your account
value by $1,000 (for example,  an $8,600 account value divided by $1,000 = 8.6),
then  multiply  the result by the  number in the first  line  under the  heading
entitled  "Expenses Paid During the Period" to estimate the expenses you paid on
your account during this period.

HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES

      The  second  line for each  class of shares in the  table  below  provides
information about hypothetical account values and hypothetical expenses based on
the Fund's actual expense ratios for each class of shares and an assumed rate of
return of 5% per year before  expenses,  which is not the Fund's actual  return.
The  hypothetical  account  values and  expenses may not be used to estimate the
actual ending account  balance or expenses you paid for the period.  You may use
this information to compare the ongoing costs of investing in the Fund and other
funds. To do so, compare this 5%  hypothetical  example with the 5% hypothetical
examples that appear in the shareholder reports of other funds.

      Please note that the  expenses  shown in the table are meant to  highlight
your ongoing costs only and do not reflect any transaction costs. Therefore, the
second  line  under  each  class of shares  in the table is useful in  comparing
ongoing costs only,  and will not help you determine the relative total costs of
owning different funds. In addition, if these transactional costs were included,
your costs would have been higher.



                                                                            -66-

SHAREHOLDER EXPENSE EXAMPLE (UNAUDITED) (CONTINUED)



                                                                                   RATIO OF
                                                                                  EXPENSES TO
                                                                                    AVERAGE
                                                           EXPENSES PAID           NET ASSETS
                         BEGINNING         ENDING        DURING THE PERIOD        FOR THE SIX
                       ACCOUNT VALUE   ACCOUNT VALUE       MAY 1, 2005 TO         MONTHS ENDED
                        MAY 1, 2005   OCTOBER 31, 2005   OCTOBER 31, 2005(b)   OCTOBER 31, 2005(c)
                      --------------  ----------------   -------------------   -------------------
                                                                         
ALGER LARGECAP GROWTH INSTITUTIONAL FUND
CLASS I:
Actual ...............   $1,000.00       $1,124.40            $5.78                  1.08%
Hypothetical(a) ......    1,000.00        1,019.76             5.50                  1.08
CLASS R:
Actual ...............    1,000.00        1,121.30             8.39                  1.57
Hypothetical(a) ......    1,000.00        1,017.29             7.98                  1.57
ALGER SMALLCAP GROWTH INSTITUTIONAL FUND
CLASS I:
Actual ...............   $1,000.00       $1,209.60            $6.68                  1.20%
Hypothetical(a) ......    1,000.00        1,019.16             6.11                  1.20
CLASS R:
Actual ...............    1,000.00        1,206.60             9.34                  1.68
Hypothetical(a) ......    1,000.00        1,016.74             8.54                  1.68
ALGER MIDCAP GROWTH INSTITUTIONAL FUND
CLASS I:
Actual ...............   $1,000.00       $1,129.90            $5.91                  1.10%
Hypothetical(a) ......    1,000.00        1,019.66             5.60                  1.10
CLASS R:
Actual ...............    1,000.00        1,126.10             8.57                  1.60
Hypothetical(a) ......    1,000.00        1,017.14             8.13                  1.60
ALGER CAPITAL APPRECIATION INSTITUTIONAL FUND
CLASS I:
Actual ...............   $1,000.00       $1,142.90            $6.32                  1.17%
Hypothetical(a) ......    1,000.00        1,019.31             5.96                  1.17
CLASS R:
Actual ...............    1,000.00        1,139.30             9.00                  1.67
Hypothetical(a) ......    1,000.00        1,016.79             8.49                  1.67
ALGER BALANCED INSTITUTIONAL FUND
CLASS I:
Actual ...............   $1,000.00       $1,078.30            $6.55                  1.25%
Hypothetical(a) ......    1,000.00        1,018.90             6.36                  1.25
CLASS R:
Actual ...............    1,000.00        1,074.80             9.15                  1.75
Hypothetical(a) ......    1,000.00        1,016.38             8.89                  1.75
ALGER SOCIALLY RESPONSIBLE GROWTH INSTITUTIONAL FUND
CLASS I:
Actual ...............   $1,000.00       $1,149.00            $6.77                  1.25%
Hypothetical(a) ......    1,000.00        1,018.90             6.36                  1.25
CLASS R:
Actual ...............    1,000.00        1,146.90             9.47                  1.75
Hypothetical(a) ......    1,000.00        1,016.38             8.89                  1.75


- ---------------------
(a)   5% annual return before expenses.

(b)   Expenses are equal to the annualized expense ratio of the respective share
      class, multiplied by the average account value over the period, multiplied
      by 184/365 (to reflect the one-half year period).

(c)   Annualized.


                                                                            -67-

TAX INFORMATION
(UNAUDITED)

      In accordance with  subchapter M of the Internal  Revenue Code of 1986, as
amended,  for the year ended  October 31, 2005,  18.44% of the  Balanced  Fund's
ordinary   dividends   qualified  for  the  dividends   received  deduction  for
corporations. For the year ended October 31, 2005, certain dividends paid by the
Funds may be  subject  to a maximum  rate of 15%,  as  provided  by the Jobs and
Growth Tax Relief  Reconciliation  Act of 2003. Of the distributions paid during
the fiscal year,  $18,724  represents  the maximum amount that may be considered
qualified dividend income of the Balanced Institutional Fund.

      Shareholders  should not use the above  information  to prepare  their tax
returns.  Since  the  Trust's  fiscal  year is not the  calendar  year,  another
notification will be sent with respect to calendar year 2005. Such notification,
which will reflect the amount to be used by taxpayers  on their  federal  income
tax returns,  will be made in conjunction  with Form 1099 DIV and will be mailed
in January 2006. Shareholders are advised to consult their own tax advisers with
respect to the tax consequences of their investment in the Trust.


                                                                            -68-

TRUSTEES AND OFFICERS OF THE FUNDS (UNAUDITED)

       Information  about the  Trustees  and  officers of the Funds is set forth
below.  In the table the term "Alger Fund Complex" refers to the Fund, The Alger
Funds,  The Alger  American Fund,  Spectra Fund, The China-U.S.  Growth Fund and
Castle Convertible Fund, Inc., each of which is a registered  investment company
managed by Fred Alger Management, Inc. ("Alger Management"). Each Trustee serves
until an event of  termination,  such as  death  or  resignation,  or until  his
successor is duly elected;  each  officer's  term of office is one year.  Unless
otherwise noted, the address of each person named below is 111 Fifth Avenue, New
York, NY 10003.



                                                                                                   NUMBER OF
                                                                                                   PORTFOLIOS
                                                                                                     IN THE
                                                                                                   ALGER FUND
                                                                                       TRUSTEE      COMPLEX
                                                                                       AND/OR      WHICH ARE
NAME, AGE, POSITION WITH                                                               OFFICER      OVERSEEN
  THE FUND AND ADDRESS                     PRINCIPAL OCCUPATIONS                        SINCE      BY TRUSTEE
- -------------------------------------------------------------------------------------------------------------
                                                                                              
INTERESTED TRUSTEES

Fred M. Alger III (70)      Chairman of the Board of Alger Associates, Inc.             1993           22
  Chairman of the Board     ("Associates"), Fred Alger & Company, Incorporated
                            ("Alger Inc."), Alger Management, Alger
                            Properties, Inc. ("Properties"), Alger Shareholder
                            Services, Inc. ("Services"), Alger Life Insurance
                            Agency, Inc. ("Agency"), Fred Alger International
                            Advisory S.A. ("International"), and five of the six
                            funds in the Alger Fund Complex; Chairman of the
                            Boards of Alger SICAV ("SICAV") and Analysts
                            Resources, Inc. ("ARI").

Dan C. Chung (43)           President, Director and Chief Investment Officer            2001           16
  President and             of Alger Management; President and Director of
  Trustee                   Associates, Alger Inc., Properties, Services, Agency,
                            International,  ARI and Trust;  Trustee/Director  of
                            four of the six funds in the Alger Fund Complex.

Hilary M. Alger (44)        Trustee/Director of five of the six funds in the            2003           17
  Trustee                   Alger Fund Complex; Director of Development,
                            Pennsylvania Ballet;  formerly Associate Director of
                            Development,   College   of   Arts   and   Sciences,
                            University   of  Virginia,   formerly   Director  of
                            Development   and    Communications,    Lenox   Hill
                            Neighborhood House.

NON-INTERESTED TRUSTEES

Stephen E. O'Neil (73)      Attorney; Private investor since 1981; Director of          1993           23
  Trustee                   Brown-Forman Corporation; Trustee/Director of
                            the six funds in the Alger Fund Complex; formerly
                            of Counsel to the law firm of Kohler & Barnes.



                                                                            -69-

TRUSTEES AND OFFICERS OF THE FUNDS (UNAUDITED) (CONTINUED)



                                                                                                   NUMBER OF
                                                                                                   PORTFOLIOS
                                                                                                     IN THE
                                                                                                   ALGER FUND
                                                                                       TRUSTEE      COMPLEX
                                                                                       AND/OR      WHICH ARE
NAME, AGE, POSITION WITH                                                               OFFICER      OVERSEEN
  THE FUND AND ADDRESS                     PRINCIPAL OCCUPATIONS                        SINCE      BY TRUSTEE
- -------------------------------------------------------------------------------------------------------------
                                                                                              
Charles F. Baird, Jr. (52)  Managing Partner of North Castle Partners, a private        2000           16
 Trustee                    equity securities group; Chairman of Equinox, Leiner
                            Health  Products,  Elizabeth  Arden Day Spas,  Grand
                            Expeditions and EAS; Trustee/Director of four of the
                            six  funds  in  the  Alger  Fund  Complex.  Formerly
                            Managing Director of AEAInvestors, Inc.

Roger P. Cheever (60)       Associate Dean of Development, Harvard University;          2000           16
 Trustee                    Trustee/Director of four of the six funds in the Alger
                            Fund Complex. Formerly Deputy Director of the
                            Harvard College Fund.

Lester L. Colbert, Jr. (71) Private investor; Trustee/Director of five of the six       2000           17
 Trustee                    funds in the Alger Fund Complex. Formerly Chairman
                            of the Board and Chief Executive Officer of Xidex
                            Corporation.

Nathan E. Saint-Amand,      Medical doctor in private practice; Co-Partner Fishers      1993           23
 M.D. (67)                  Island Partners; Member of the Board of the Manhattan
 Trustee                    Institute; Trustee/Director of the six funds in the Alger
                            Fund Complex. Formerly Co-Chairman Special Projects
                            Committee of Memorial Sloan Kettering.

OFFICERS

Frederick A. Blum (51)      Executive Vice President and Treasurer of Alger Inc.,       1996           N/A
  Treasurer                 Alger Management, Properties, Associates, ARI,
                            Services and Agency since September 2003 and
                            Senior Vice President prior thereto; Treasurer of
                            each of the other five investment companies in the
                            Alger Fund Complex since the later of 1996 or its
                            inception. Director of SICAV and International and
                            Chairman of the Board (and prior thereto, Senior
                            Vice President) and Treasurer of Alger National
                            Trust Company since 2003.

Hal Liebes (41)             Executive Vice President, Chief Legal Officer and           2005           N/A
  Secretary and Chief       Secretary of Alger Inc. and Alger Management,
  Compliance Officer        Secretary of the other five investment companies
                            in the Alger Fund Complex-2005. Formerly Global
                            Chief Compliance Officer 2004, AMVESCAP PLC.;
                            and Global General Counsel 2002-2004 and,
                            U.S. General Counsel 1994-2002
                            Credit Suisse Asset Management.




                                                                            -70-

TRUSTEES AND OFFICERS OF THE FUNDS (UNAUDITED) (CONTINUED)



                                                                                                   NUMBER OF
                                                                                                   PORTFOLIOS
                                                                                                     IN THE
                                                                                                   ALGER FUND
                                                                                       TRUSTEE      COMPLEX
                                                                                       AND/OR      WHICH ARE
NAME, AGE, POSITION WITH                                                               OFFICER      OVERSEEN
  THE FUND AND ADDRESS                     PRINCIPAL OCCUPATIONS                        SINCE      BY TRUSTEE
- -------------------------------------------------------------------------------------------------------------
                                                                                              
Michael D. Martins (39)     Senior Vice President of Alger Management;                  2005          N/A
  Assistant Treasurer       Assistant Treasurer and Assistant Secretary of
  and Assistant             the other five investment companies in the
  Secretary                 Alger Fund Complex-2005. Formerly Vice President,
                            Brown Brothers Harriman & Co. 1997-2004.


       Messrs.  Alger and  Chung  are  "interested  persons"(as  defined  in the
Investment  Company  Act) of the Fund because of their  affiliations  with Alger
Management. Mr. Chung is Mr. Alger's son-in-law. Ms. Alger is a daughter of Fred
M. Alger III. Ms. Alger is an  "interested  person"  because she is an immediate
family  member of Mr.  Alger.  No Trustee is a  director  of any public  company
except as may be indicated under "Principal Occupations."

       The Statement of Additional  Information contains additional  information
about the Funds'  Trustees  and is  available  without  charge  upon  request by
calling (800) 992-3863.


                                                                            -71-

INVESTMENT MANAGEMENT AGREEMENT RENEWAL

At an in-person  meeting  held on  September 7, 2005,  the Trustees of the Trust
considered  renewal of the Investment  Management  Agreements (the "Agreements")
between the Trust in respect of each of its portfolios  (each a "Fund") and Fred
Alger  Management,  Inc. (the  "Adviser").  The Trustees who are not "interested
persons"  of the Trust (the  "Independent  Trustees")  within the meaning of the
Investment  Company Act of 1940 (the "1940 Act") also met separately  with their
counsel to consider the Agreements.  In evaluating the Agreements,  the Trustees
drew on materials that they requested and which were provided to them in advance
of the  meeting  by the  Adviser  and by counsel  to the  Trust.  The  materials
covered, among other matters, (i) the nature, extent and quality of the services
provided by the Adviser under the Agreements, (ii) the investment performance of
each of the  Funds,  (iii)  the costs to the  Adviser  of its  services  and the
profits  realized  by the  Adviser  and its  affiliates  Fred  Alger &  Company,
Incorporated and Alger Shareholder  Services,  Inc. from their relationship with
each of the Funds,  and (iv) the  extent to which  economies  of scale  would be
realized if and as each Fund grows and whether the fee levels in the  respective
Agreements  reflect  these  economies  of scale.  These  materials  included  an
analysis  of the Funds and the  Adviser's  services  by Callan  Associates  Inc.
("Callan"),  an independent consulting firm whose specialties include assistance
to fund trustees and directors in their review of advisory contracts pursuant to
Section 15(c) of the 1940 Act. At the meeting,  senior Callan personnel provided
a presentation to the Trustees based on the Callan materials.

In deciding  whether to renew the  Agreement,  the Trustees  considered  various
factors, including those enumerated above. They also considered other direct and
indirect benefits to the Adviser and its affiliates from their relationship with
the Trust.

NATURE, EXTENT AND QUALITY OF SERVICES

In considering  the nature,  extent and quality of the services  provided by the
Adviser, the Trustees relied on their prior experience as Trustees of the Trust,
their  familiarity  with the personnel and resources of Alger Management and its
affiliates,  and the  materials  provided at the meeting.  They noted that under
each of the Agreements  the Adviser is  responsible  for managing the investment
operations  of  the   respective   Fund  and  for  providing  a  full  range  of
administrative,  compliance, reporting and accounting services necessary for the
conduct  of the  Fund's  affairs.  The  Trustees  reviewed  the  background  and
experience of the Adviser's senior investment  management  personnel,  including
those individuals  responsible for the investment  operations of each Fund. They
also  considered  the  resources,  operational  structures  and practices of the
Adviser in managing the Funds'  portfolios and administering the Funds' affairs,
as well as the Adviser's overall investment  management  business.


                                                                            -72-

The Trustees concluded that the Adviser's experience,  resources and strength in
those areas of importance to the Funds are  considerable.  They noted especially
the Adviser's  history of expertise in managing  portfolios  of "growth"  stocks
like those of the Funds. They also took notice of the Balanced Fund's ability to
manage  fixed-income  instruments  across the credit and credit quality spectra.
The Trustees  also con sidered the level and depth of the  Adviser's  ability to
execute portfolio  transactions to effect investment decisions.  They also noted
the    history   of    extremely    favorable    reviews   of   the    Adviser's
shareholder-relations representatives by an independent rating concern. Finally,
the  Trustees  took notice of the  enhancements  to the  control and  compliance
environment  at the Adviser and within the Trust.  On the basis of their review,
the Trustees  determined that the nature and extent of the services  provided to
each  of the  Funds  by  the  Adviser  (including,  in  each  case,  the  Fund's
performance,  as discussed  below) were of high quality and could be expected to
remain so.

INVESTMENT PERFORMANCE OF THE FUNDS

Drawing  upon  information  provided  at the  meeting by the  Adviser as well as
Callan and upon reports  provided to the Trustees by the Adviser  throughout the
preceding  year,  the Trustees  noted that the  performance of each of the Funds
thus far in 2005 had been more than satisfactory. For the year to date at August
31,  2005,  each  Fund had  beaten  its  benchmark  index  (in  some  cases by a
significant  margin) and the data available  indicated that each had placed well
above the  median of its  Lipper  peer  group.  For some  Funds,  this  marked a
substantial improvement over 2004; for others, it was a continuation of a longer
period  of  above-average  performance.   The  Trustees  acknowledged  that  the
Adviser's recent efforts to improve the Funds'  performance and, more generally,
the firm's  rebuilding  of the  investment  team in response to the  devastating
events of September 11, 2001,  were bearing fruit.  Accordingly,  they concluded
that the  performance  of each of the Funds  strongly  supported  renewal of the
Fund's Agreement.

PROFITABILITY TO THE ADVISER AND ITS AFFILIATES

The Trustees considered the profitability of the advisory  arrangement with each
Fund to the Adviser and the Adviser's affiliates and the methodology used by the
Adviser in determining such  profitability.  The Trustees had been provided with
data on each Fund's profitability to the Adviser and to the Adviser's affiliates
for the Fund's most recent fiscal year. In addition,  the Trustees reviewed each
Fund's  management  fees and expense  ratios and  compared  them with a group of
comparable  funds.  In order to assist the Trustees in this  comparison,  Callan
provided the Trustees with  comparative  information  with respect to fees paid,
and expense ratios incurred,  by similar funds. That information indicated that,
while two Funds'  advisory fees were below the median for the Callan peer group,
the other  Funds' fees were above it, and that while the Funds'  expense  ratios
for one class of shares were near or only somewhat


                                                                            -73-

above the median,  the ratios for the other class were  substantially  above the
median.  The Trustees  determined that the  information  about the advisory fees
should be taken into account in weighing the size of the fee against the nature,
extent and quality of the services  provided,  and that further inquiry would be
appropriate as to the expense ratios.  After discussing with  representatives of
the Adviser and Callan the methodologies used in computing the costs that formed
the  bases  of  the  profitability  calculations,  the  Trustees  turned  to the
profitability data provided.  After analysis and discussion they concluded that,
in the case of each Fund,  the Adviser's  profitability  was  undeniably  modest
while the Adviser's affiliates lost money.

ECONOMIES OF SCALE

On the  basis of  their  discussions  with  management  and  their  analysis  of
information  provided at the meeting, the Trustees determined that the nature of
the Funds and their  operations  is such that the  Adviser  is likely to realize
economies of scale in the  management  of each Fund at some point as it grows in
size,  but that in view of the current  levels of  profitability  of each of the
Funds to the  Adviser  and its  affiliates,  such  economies  had either not yet
emerged or were subsumed in the level of the management  fees, and that adoption
of  breakpoints in one or more advisory  fees,  while possibly  appropriate at a
later date,  could await further  analysis of the sources and potential scale of
the economies and the fee structure  that would best reflect them.  Accordingly,
the Trustees  requested that the Adviser address this topic with the Trustees at
future meetings.

OTHER BENEFITS TO THE ADVISER

The  Trustees  considered  whether the  Adviser  benefits in other ways from its
relationship  with the Funds.  In that  connection,  they noted that the Adviser
maintains  soft-dollar  arrangements  in  connection  with the Funds'  brokerage
transactions,  data on which is  regularly  supplied  to the  Trustees  at their
quarterly meetings.  The Trustees also noted that the Trust's Distributor,  Fred
Alger &  Company,  Incorporated,  provides a  substantial  portion of the Funds'
equity brokerage and receives shareholder servicing fees from the Funds as well,
and that Alger Shareholder  Services,  Inc. receives fees from the Funds under a
shareholder services agreement.  The Trustees had been provided with information
regarding,  and had  considered,  the  brokerage and  shareholder  servicing fee
benefits in connection with their review of the profitability to the Adviser and
its  affiliates  of their  relationships  with  the  Funds.  As to the  benefits
received from the soft-dollar arrangements,  the Trustees decided that, in light
of the nature and scale of the arrangements,  they were not so significant as to
render the Adviser's fees excessive.

CONCLUSION

After weighing the foregoing  factors,  the Trustees,  including the Independent
Trustees, approved the renewal of each of the Investment Management


                                                                            -74-

Agreements.  They reasoned that, considered in themselves, the services provided
by the Adviser were  appropriate for the needs of each Fund and of high quality,
that the recent  performance of each Fund had been more than  satisfactory,  and
that the Adviser could  reasonably be expected to provide services of comparable
quality in the future.  The Trustees  determined  that the advisory fees,  while
higher in most cases than those charged by a majority of similar funds, were not
so high even in those cases as to be unreasonable when considered in relation to
the  nature,  extent  and  high  quality  of the  services  currently  provided,
including the Funds' recent performance, that in each case the profitability, if
any, of the Fund's  relationship  with the Adviser and its affiliates was not so
great as to  render  the fee  excessive,  that any  additional  benefits  to the
Adviser  and/or  its  affiliates  other  than those  already  considered  in the
profitability  analysis  were  not  of a  magnitude  materially  to  affect  the
Trustees' deliberations,  and that the issue of shar ing economies of scale with
the  Funds,  while  inviting  future  consideration,  was not of  major  current
importance.


                                                                            -75-

PROXY VOTING POLICIES

A description  of the policies and procedures the Trust uses to determine how to
vote proxies  relating to portfolio  securities  and the proxy voting  record is
available,  without  charge,  by calling (800)  992-3362 or online on the Funds'
website at http://www.alger.com or on the SEC's website at http://www.sec.gov.

QUARTERLY FUND HOLDINGS

The Funds file their  complete  schedule of portfolio  holdings with the SEC for
the first and  third  quarter  of each  fiscal  year on Form N-Q.  Forms N-Q are
available online on the Funds' website at  http://www.alger.com  or on the SEC's
website at  http://www.sec.gov.  The Funds' Forms N-Q may be reviewed and copied
at the SEC's Public Reference Room in Washington, D.C. Information regarding the
operation  of the  SEC's  Public  Reference  Room  may be  obtained  by  calling
1-800-SEC-0330.  A copy  of the  most  recent  quarterly  holdings  may  also be
obtained from the Funds by calling (800) 992-3362.


NOTES:













THE ALGER INSTITUTIONAL FUNDS

111 Fifth Avenue
New York, NY 10003
(800) 992-3362
www.alger.com

INVESTMENT MANAGER
Fred Alger Management, Inc.
111 Fifth Avenue
New York, NY 10003

TRANSFER AGENT AND DIVIDEND DISBURSING AGENT
Boston Financial Data Services, Inc.
P.O. Box 8480
Boston, MA 02266

This report is submitted for the general  information of the shareholders of The
Alger Institutional  Funds. It is not authorized for distribution to prospective
investors  unless  accompanied by an effective  Prospectus for the Trust,  which
contains  information  concerning  the  Trust's  investment  policies,  fees and
expenses as well as other pertinent information.



[ALGER LOGO]















SAIF 103105



[ALGER LOGO]   The Alger Institutional Funds
               Boston Financial Data Services, Inc.
               P.O. Box 8480
               Boston, MA 02266
















SAIF 103105



ITEM 2.   CODE OF ETHICS.

          (a) The Registrant has adopted a code of ethics (the "Code of Ethics")
          that applies to its principal executive officer, principal financial
          officer, principal accounting officer or controller, or persons
          performing similar functions.

          (b) Not applicable.

          (c) The amendments to the Code of Ethics are: The 60-day holding
          period for selling securities at gains now applies to Access persons,
          before it applied only to Advisory persons; Prohibition on IPO's now
          applies to Access persons, before it applied only to Advisory persons;
          Approval from Legal/Compliance is now necessary for investments in
          Private Placements by Access persons, before, such approval was only
          required of Advisory persons.

          (d) The Registrant has not granted a waiver or an implicit waiver from
          a provision of its Code of Ethics during the period covered by the
          shareholder report presented in Item 1 hereto.

          (e) Not applicable.

          (f) The Registrant's Code of Ethics is attached as an Exhibit hereto.

ITEM 3.   AUDIT COMMITTEE FINANCIAL EXPERT.

          The Board of Trustees of the Registrant determined that Stephen E.
          O'Neil is an audit committee financial expert (within the meaning of
          that phrase specified in the instructions to Form N-CSR) on the
          Registrant's audit committee. Mr. O'Neil is an "independent" trustee -
          i.e., he is not an interested person of the Registrant as defined in
          the Investment Company Act of 1940, nor has he accepted directly or
          indirectly any consulting, advisory or other compensatory fee from the
          Registrant, other than in his capacity as Trustee.

ITEM 4.   PRINCIPAL ACCOUNTANT FEES AND SERVICES.

          a) Audit Fees:
                     October 31, 2005             $117,600
                     October 31, 2004             $35,350

          b) Audit-Related Fees: NONE

          c) Tax Fees for tax advice, tax compliance and tax planning:
                     October 31, 2005             $24,570
                     October 31, 2004             $25,300

          d) All Other Fees:
                     October 31, 2005             $10,225
                     October 31, 2004             $13,500

          Other fees include a review and consent for Registrants registration
          statement filing and a review of the semi-annual financial statements.

          e) 1) Audit Committee Pre-Approval Policies And Procedures:

          Audit and non-audit services provided by the Registrant's independent
          registered public accounting firm (the "Auditors") on behalf the
          Registrant must be pre-approved by the Audit Committee. Non-audit
          services provided by the Auditors on behalf of the Registrant's
          Investment Adviser or any entity controlling, controlled by, or under
          common control with the Investment Adviser must be pre-approved by the
          Audit Committee if such non-audit services directly relate to the
          operations or financial reporting of the Registrant.



             2) All fees in item 4(b) through 4(d) above were approved by the
             Registrants' Audit Committee.

          f) Not Applicable

          g) Non-Audit Fees:
                     October 31, 2005             $186,831 and 56,050 Euros
                     October 31, 2004             $157,449 and 82,300 Euros

          h) The audit committee of the board of trustees has considered whether
          the provision of the non-audit services that were rendered to the
          registrant's investment adviser and any entity controlling, controlled
          by, or under common control, with the adviser that provides ongoing
          services to the registrant that were not approved pursuant to
          (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with
          maintaining the principle accountant's independence.

ITEM 5.   AUDIT COMMITTEE OF LISTED REGISTRANTS.

          Not applicable

ITEM 6.   SCHEDULE OF INVESTMENTS

          Not applicable

ITEM 7.   DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED END
          MANAGEMENT INVESTMENT COMPANIES.

          Not applicable

ITEM 8.   PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

          Not applicable

ITEM 9.   PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT
          COMPANY AND AFFILIATED PURCHASERS.

          Not applicable

ITEM 10.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

          None

ITEM 11.  CONTROLS AND PROCEDURES.

          (a) The Registrant's principal executive officer and principal
          financial officer have concluded that the Registrant's disclosure
          controls and procedures (as defined in Rule 30a-3(c) under the
          Investment Company Act of 1940, as amended) are effective based on
          their evaluation of the disclosure controls and procedures as of a
          date within 90 days of the filing date of this document.

          (b) No changes in the Registrant's internal control over financial
          reporting occurred during the Registrant's second fiscal half-year
          that materially affected, or are reasonably likely to materially
          affect, the Registrant's internal control over financial reporting.

ITEM 12.  EXHIBITS.

          (a) (1) Code of Ethics as Exhibit 99.CODE ETH

          (a) (2) Certifications of principal executive officer and principal
          financial officer as required by rule 30a-2(a) under the Investment
          Company Act of 1940 are attached as Exhibit 99.CERT

          (b) Certifications of principal executive officer and principal
          financial officer as required by rule 30a-2(b) under the Investment
          Company Act of 1940 are attached as Exhibit 99.906CERT



SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, the registrant has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.

The Alger Institutional Funds

By:    /s/Dan C. Chung

       Dan C. Chung

       President

Date:  January 6, 2006

Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, this report has been signed below by the
following persons on behalf of the registrant and in the capacities and on the
dates indicated.

By:    /s/Dan C. Chung

       Dan C. Chung

       President

Date:  January 6, 2006

By:    /s/Frederick A. Blum

       Frederick A. Blum

       Treasurer

Date:  January 6, 2006