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 811-01311

                            The Gabelli Mathers Fund
          -------------------------------------------------------------
               (Exact name of registrant as specified in charter)

                              One Corporate Center
                            Rye, New York 10580-1422
          -------------------------------------------------------------
               (Address of principal executive offices) (Zip code)

                                 Bruce N. Alpert
                               Gabelli Funds, LLC
                              One Corporate Center
                            Rye, New York 10580-1422
          -------------------------------------------------------------
                     (Name and address of agent for service)

       registrant's telephone number, including area code: 1-800-422-3554
                                                           --------------

                      Date of fiscal year end: December 31
                                               -----------

                   Date of reporting period: December 31, 2003
                                             -----------------



Form N-CSR is to be used by management investment companies to file reports with
the Commission not later than 10 days after the transmission to stockholders of
any report that is required to be transmitted to stockholders under Rule 30e-1
under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may
use the information provided on Form N-CSR in its regulatory, disclosure review,
inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-CSR,
and the Commission will make this information public. A registrant is not
required to respond to the collection of information contained in Form N-CSR
unless the Form displays a currently valid Office of Management and Budget
("OMB") control number. Please direct comments concerning the accuracy of the
information collection burden estimate and any suggestions for reducing the
burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW,
Washington, DC 20549-0609. The OMB has reviewed this collection of information
under the clearance requirements of 44 U.S.C. ss. 3507.






ITEM 1. REPORTS TO STOCKHOLDERS.

The Annual Report to Shareholders is attached herewith.

                            THE GABELLI MATHERS FUND

                                  ANNUAL REPORT
                                DECEMBER 31, 2003


TO OUR SHAREHOLDERS,

      The Sarbanes-Oxley Act requires a Fund's principal executive and financial
officers  to  certify  the  entire   contents  of  the  semi-annual  and  annual
shareholder  reports in a filing with the Securities and Exchange  Commission on
Form N-CSR. This certification  would cover the portfolio  manager's  commentary
and  subjective  opinions  if they are  attached  to or a part of the  financial
statements. Many of these comments and opinions would be difficult or impossible
to certify.

      Because we do not want our portfolio  managers to eliminate their opinions
and/or  restrict their  commentary to historical  facts, we have separated their
commentary from the financial  statements and investment portfolio and have sent
it to  you  separately.  Both  the  commentary  and  the  financial  statements,
including  the  portfolio  of  investments,  will be available on our website at
www.gabelli.com/funds.

      Enclosed are the audited financial statements and the investment portfolio
as of December  31, 2003 with a  description  of the factors  that  affected the
performance during the past year.

                                           Sincerely yours,
                                           /s/BRUCE N. ALPERT
                                           Bruce N. Alpert
                                           Executive Vice President
February 24, 2004






PERFORMANCE DISCUSSION

      The Fund  maintained a risk-averse  portfolio  structure  during 2003. The
Fund's  portfolio  remained  conservatively  invested  at year end,  with  stock
positions  totaling  10.3% of assets,  comprised  of 6.4% longs and 3.9% shorts,
with the  remainder  in cash  equivalents,  awaiting  lower risk entry points to
initiate new and larger  capital  commitments.  The fixed income  segment of the
portfolio, which was limited to short-term U.S. Treasury bills and U.S. Treasury
collateralized  repos in 2003, added to the Fund's total return, while the short
equity segment had a negative return,  and was the primary factor for the Fund's
investment performance in 2003.

      During the year, a portion of the Fund's common stock segment was invested
in  takeover-target  companies  subject to  friendly,  all cash tender or merger
offers from acquiring  companies.  The Fund purchased these event-driven  stocks
after the deals  were  publicly  announced,  generally  by  financially  strong,
strategic buyers. These stocks typically earn relatively high annualized returns
and are held  for  short  time  periods,  which  disproportionately  raises  the
portfolio  turnover  rate,  which can be  misleading.  This occurs when the Fund
purchases a fixed income position which has a maturity of less than one year and
represents a relatively  high  percentage of the Fund's assets while the percent
invested in stocks is low.


[GRAPHIC OMITTED]
PLOT POINTS FOLLOW:

              GROWTH OF $10,000 INVESTMENT IN GABELLI MATHERS FUND
                               Logarithmic Scale

     GABELLI MATHERS         S&P 500
         FUND                 INDEX

'65      10,000              10,000
         11,934               9,323
         22,987              11,558
         29,162              12,836
         27,412              11,743
'70      27,953              12,213
         33,496              13,961
         38,897              16,610
         24,447              14,179
         16,965              10,427
'75      26,643              14,306
         38,466              17,719
         43,926              16,431
         50,540              17,512
         74,071              20,743
'80     103,911              27,466
         95,865              26,119
        110,107              31,708
        127,906              38,849
        124,601              41,282
'85     158,832              54,401
        181,035              64,583
        229,978              67,970
        261,541              79,228
        288,752             104,303
'90     318,857             101,075
        348,967             131,795
        359,817             141,818
        367,517             156,087
        345,859             158,130
'95     370,118             217,491
        369,841             267,423
        380,963             356,638
        361,101             459,042
        381,742             555,704
'00     400,913             505,093
        417,955             445,063
        368,824             346,700
        361,659             446,166

Percent Average Annual Returns *

                        1 YR  5 YRS  10 YRS  20 YRS  25 YRS  30 YRS  38 YRS**
GABELLI MATHERS FUND   (1.94)  0.03  (0.15)   5.33    8.19    9.40     9.95
Standard & Poor's 500   28.69 (0.57) 11.07   12.98   13.83   12.18    10.51

*  All periods ended  12-31-03.  Average annual returns reflect changes in share
   price  and  reinvestment  of  dividends  and  are  net of  expenses.  Returns
   represent past  performance and do not guarantee  future results.  Investment
   returns and the principal value of an investment will fluctuate.  When shares
   are redeemed  they may be worth more or less than their  original  cost.  The
   Standard & Poor's 500 is an unmanaged indicator of stock market performance.
** From commencement of investment operations on August 19, 1965.


                                        2



THE GABELLI MATHERS FUND
PORTFOLIO OF INVESTMENTS -- DECEMBER 31, 2003
- --------------------------------------------------------------------------------
                                                                       MARKET
      SHARES                                      COST                 VALUE
      ------                                      ----                -------
              COMMON STOCKS -- 6.4%
              AEROSPACE -- 0.4%
      10,000  Titan Corp.+ ................   $   216,180           $   218,100
                                              -----------           -----------
              BROADCASTING -- 1.0%
      50,000  Liberty Media Corp., Cl. A+ .       543,975               594,500
                                              -----------           -----------
              BUILDING AND CONSTRUCTION -- 0.2%
      65,400  Empresas ICA Sociedad
                Controladora SA de CV
                ADR+ ......................        90,290                92,868
                                              -----------           -----------
              COMPUTER SOFTWARE AND SERVICES -- 0.0%
       1,000  ON Technology Corp.+ ........         3,910                 3,960
       1,000  Systems & Computer
                Technology Corp.+ .........        16,350                16,350
                                              -----------           -----------
                                                   20,260                20,310
                                              -----------           -----------
              CONSUMER PRODUCTS -- 0.9%
      20,000  Dial Corp. ..................       569,130               569,400
                                              -----------           -----------
              DIVERSIFIED INDUSTRIAL -- 0.2%
       6,000  Denison International plc, ADR+     143,220               143,670
                                              -----------           -----------
              ENERGY AND UTILITIES -- 0.8%
         500  Anadarko Petroleum Corp. ....        22,080                25,505
         500  Cinergy Corp. ...............        18,045                19,405
       1,000  Duquesne Light Holdings Inc.         15,295                18,340
         500  Murphy Oil Corp. ............        29,891                32,655
      15,000  Unisource Energy Corp. ......       369,917               369,900
                                              -----------           -----------
                                                  455,228               465,805
                                              -----------           -----------
              FINANCIAL SERVICES -- 0.2%
       5,000  HPSC Inc.+ ..................        71,950                72,250
         500  MONY Group Inc.+ ............        16,635                15,645
       1,000  Sovereign Bancorp Inc. ......        18,360                23,750
                                              -----------           -----------
                                                  106,945               111,645
                                              -----------           -----------
              FOOD AND BEVERAGE -- 1.8%
      40,000  ConAgra Foods Inc. ..........     1,014,579             1,055,600
         500  Dreyer's Grand Ice Cream
                Holdings Inc., Cl. A ......        39,595                38,875
       1,000  Hain Celestial Group Inc.+ ..        18,393                23,210
                                              -----------           -----------
                                                1,072,567             1,117,685
                                              -----------           -----------
              HEALTH CARE -- 0.7%
       5,000  Bristol-Myers Squibb Co. ....       126,000               143,000
       5,000  CIMA Labs Inc.+ .............       165,053               163,100
       4,000  ElderTrust ..................        50,060                50,120
       2,000  Invivo Corp.+ ...............        42,540                43,840
                                              -----------           -----------
                                                  383,653               400,060
                                              -----------           -----------
              RETAIL -- 0.1%
       1,000  Gucci Group NV, ADR .........        85,160                85,550
                                              -----------           -----------
              TELECOMMUNICATIONS -- 0.1%
       1,000  BellSouth Corp. .............        24,080                28,300
       1,000  SBC Communications Inc. .....        22,310                26,070
       1,000  Verizon Communications Inc. .        32,920                35,080
                                              -----------           -----------
                                                   79,310                89,450
                                              -----------           -----------
              TOTAL COMMON STOCKS .........     3,765,918             3,909,043
                                              -----------           -----------

                                                                       MARKET
      SHARES                                      COST                 VALUE
      ------                                      ----                -------
              U.S.  GOVERNMENT  OBLIGATIONS -- 90.4%
 $55,000,000  U.S.  Treasury Bills,
                0.876%++, 01/08/04 (a) ....   $54,990,642           $54,990,642
                                              -----------           -----------
              REPURCHASE AGREEMENT -- 3.5%
   2,103,188  State Street Bank & Trust Co.,
                0.810%, dated 12/31/03,
                due 01/02/04, proceeds at
                maturity, $2,103,282 (b) ..     2,103,188             2,103,188
                                              -----------           -----------
              TOTAL INVESTMENTS --
                100.3% ....................   $60,859,748            61,002,873
                                              ===========
              OTHER ASSETS AND LIABILITIES (NET) -- (0.3)%             (157,348)
                                                                    -----------
              NET ASSETS -- 100.0% .............................    $60,845,525
                                                                    ===========

                                                                       MARKET
      SHARES  COMMON STOCKS                     PROCEEDS                VALUE
      ------  -------------                     --------               ------
              SECURITIES SOLD SHORT
       2,000  99 Cents Only Stores ........   $   (58,037)          $   (54,460)
       3,000  Carnival Corp. ..............       (99,265)             (119,190)
       3,000  Cheesecake Factory Inc. .....      (108,342)             (132,090)
       1,000  Ethan Allen Interiors Inc. ..       (35,238)              (41,880)
       1,000  Gap Inc. ....................       (16,949)              (23,210)
       7,000  Harley-Davidson Inc. ........      (302,806)             (332,710)
       2,000  Kohl's Corp. ................      (108,625)              (89,880)
       9,000  La-Z-Boy Inc. ...............      (187,298)             (188,820)
       1,000  McDonald's Corp. ............       (17,099)              (24,830)
       6,000  Polaris Industries Inc. .....      (417,498)             (531,480)
       2,000  Sherwin-Williams Co. ........       (55,217)              (69,480)
       5,000  The Home Depot Inc. .........      (161,868)             (177,450)
       6,000  Tiffany & Co. ...............      (167,392)             (271,200)
       4,000  Toro Co. ....................      (128,296)             (185,600)
       2,000  Zale Corp. ..................       (94,066)             (106,400)
                                              -----------           -----------
              TOTAL SECURITIES
                SOLD SHORT ................   $(1,957,996)          $(2,348,680)
                                              ===========           ===========
- ----------------
              For Federal tax purposes:
              Aggregate cost of investments .....................   $60,859,748
                                                                    ===========
              Gross unrealized appreciation .....................   $   146,805
              Gross unrealized depreciation .....................        (3,680)
                                                                    -----------
              Net unrealized appreciation .......................   $   143,125
                                                                    ===========
- ----------------
 (a)  At December 31, 2003,  $25,000,000  of the principal  amount was pledged
      as collateral for  securities  sold short.
 (b)  Collateralized  by U.S.  Treasury Notes, 5.875%, due 11/15/04,
      market value $2,147,375.
 +    Non-income producing security.
 ++   Represents annualized yield at date of purchase.


                 See accompanying notes to financial statements.
                                        3



                            THE GABELLI MATHERS FUND

STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 2003
- --------------------------------------------------------------------------------
ASSETS:
  Investments, at value (cost $60,859,748) .....................   $ 61,002,873
  Cash .........................................................          3,657
  Deposit at brokers ...........................................      2,356,627
  Dividends and interest receivable ............................          1,727
  Receivable for fund shares sold ..............................          9,896
  Other assets .................................................          5,241
                                                                   ------------
  TOTAL ASSETS .................................................     63,380,021
                                                                   ------------
LIABILITIES:
  Securities sold short (proceeds $1,957,996) ..................      2,348,680
  Dividends payable on securities sold short ...................            562
  Payable for Fund shares redeemed .............................          7,495
  Payable for investment advisory fees .........................         55,240
  Payable for distribution fees ................................         13,810
  Other accrued expenses and liabilities .......................        108,709
                                                                   ------------
  TOTAL LIABILITIES ............................................      2,534,496
                                                                   ------------
  NET ASSETS applicable to 5,738,616
    shares outstanding .........................................   $ 60,845,525
                                                                   ============
NET ASSETS CONSIST OF:
  Shares of beneficial interest, at par value ..................   $  5,738,616
  Additional paid-in capital ...................................     98,551,698
  Accumulated net realized loss on investments
    and securities sold short ..................................    (43,197,230)
  Net unrealized depreciation on securities
    sold short .................................................       (390,684)
  Net unrealized appreciation on investments ...................        143,125
                                                                   ------------
  NET ASSETS ...................................................   $ 60,845,525
                                                                   ============
  NET ASSET VALUE, offering and redemptions
    price per share ($60,845,525 / 5,738,616
    shares outstanding; 100,000,000 shares
    authorized of $1.00 par value) .............................         $10.60
                                                                         ======


STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 2003
- --------------------------------------------------------------------------------
INVESTMENT INCOME:
  Dividends ................................ $     6,085
  Interest .................................     765,363
  Other Income .............................      17,713
                                             -----------
  TOTAL INVESTMENT INCOME ..................     789,161
                                             -----------
EXPENSES:
  Investment advisory fees .................     747,475
  Distribution fees ........................     186,869
  Trustees' fees ...........................      58,936
  Custodian fees ...........................      43,553
  Shareholder services fees ................      40,818
  Shareholder communications expenses ......      39,471
  Legal and audit fees .....................      29,823
  Registration fees ........................      28,138
  Dividends on securities sold short .......      22,364
  Miscellaneous expenses ...................      48,324
                                             -----------
  TOTAL EXPENSES ...........................   1,245,771
                                             -----------
  NET INVESTMENT LOSS ......................    (456,610)
                                             -----------
NET REALIZED AND UNREALIZED LOSS ON
  INVESTMENTS AND SECURITIES SOLD SHORT:
  Net realized loss on investments .........    (132,253)
  Net realized loss on securities sold short    (537,948)
  Net change in unrealized appreciation/
    depreciation on investments and
    securities sold short ..................    (356,240)
                                             -----------
  NET REALIZED AND UNREALIZED LOSS ON
    INVESTMENTS AND SECURITIES SOLD SHORT ..  (1,026,441)
                                             -----------
  NET DECREASE IN NET ASSETS
    RESULTING FROM OPERATIONS .............. $(1,483,051)
                                             ===========



STATEMENT OF CHANGES IN NET ASSETS
- --------------------------------------------------------------------------------
                                                                                   YEAR ENDED           YEAR ENDED
                                                                                DECEMBER 31, 2003    DECEMBER 31, 2002
                                                                                -----------------    -----------------
                                                                                                 
OPERATIONS:
  Net investment loss ..........................................................   $   (456,610)       $     (1,706)
  Net realized loss on investments .............................................       (132,253)        (12,725,118)
  Net realized gain/loss on securities sold short ..............................       (537,948)            285,919
  Net change in unrealized appreciation/depreciation on
    investments and securities sold short ......................................       (356,240)          1,274,536
                                                                                   ------------        ------------
  NET DECREASE IN NET ASSETS RESULTING FROM OPERATIONS .........................     (1,483,051)        (11,166,369)
                                                                                   ------------        ------------
SHARE TRANSACTIONS:
  Net decrease in net assets from capital share transactions ...................    (18,498,603)         (5,899,570)
                                                                                   ------------        ------------
  NET DECREASE IN NET ASSETS ...................................................    (19,981,654)        (17,065,939)
NET ASSETS:
  Beginning of period ..........................................................     80,827,179          97,893,118
                                                                                   ------------        ------------
  End of period ................................................................   $ 60,845,525        $ 80,827,179
                                                                                   ============        ============



                 See accompanying notes to financial statements.
                                        4



THE GABELLI MATHERS FUND
NOTES TO FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------
1. ORGANIZATION. The Gabelli Mathers Fund (the "Fund") was organized on June 17,
1999 as a Delaware business trust. The Fund commenced  investment  operations on
October 1, 1999 as the successor to the Mathers Fund,  Inc. (the "Mathers Fund")
which was  organized  on March 31, 1965 as a Maryland  corporation.  The Mathers
Fund  commenced  investment  operations  on  August  19,  1965.  The  Fund  is a
diversified,   open-end  management  investment  company  registered  under  the
Investment  Company Act of 1940, as amended (the "1940 Act"). The Fund's primary
objective is long-term capital appreciation.

2. SIGNIFICANT  ACCOUNTING POLICIES.  The preparation of financial statements in
accordance with accounting  principles  generally  accepted in the United States
requires  management to make estimates and assumptions  that affect the reported
amounts and disclosures in the financial statements. Actual results could differ
from those  estimates.  The  following  is a summary of  significant  accounting
policies followed by the Fund in the preparation of its financial statements.

SECURITY  VALUATION.  Portfolio  securities  listed or  traded  on a  nationally
recognized securities exchange, quoted by the National Association of Securities
Dealers   Automated   Quotations,   Inc.   ("Nasdaq")  or  traded  in  the  U.S.
over-the-counter  market for which market  quotations are readily  available are
valued at the last quoted sale price on that  exchange or market as of the close
of business on the day the securities  are being valued.  If there were no sales
that day,  the  security  is valued at the  average of the closing bid and asked
prices or, if there were no asked prices  quoted on that day,  then the security
is valued at the closing  bid price on that day.  If no bid or asked  prices are
quoted on such day, the security is valued at the most recently  available price
or, if the Board of Trustees so determines, by such other method as the Board of
Trustees  shall  determine  in good faith,  to reflect  its fair  market  value.
Portfolio  securities  traded on more than one national  securities  exchange or
market are valued according to the broadest and most  representative  market, as
determined by Gabelli Funds, LLC (the "Adviser"). Portfolio securities primarily
traded on foreign markets are generally  valued at the preceding  closing values
of such  securities on their  respective  exchanges.  Securities  and assets for
which market quotations are not readily available are valued at their fair value
as  determined  in good  faith  under  procedures  established  by and under the
general  supervision of the Board of Trustees.  Short term debt  securities with
remaining maturities of 60 days or less are valued at amortized cost, unless the
Board of Trustees determines such does not reflect the securities fair value, in
which case these  securities will be valued at their fair value as determined by
the Board of Trustees.  Debt instruments  having a maturity greater than 60 days
for which  market  quotations  are  readily  available  are valued at the latest
average of the bid and asked  prices.  If there were no asked  prices  quoted on
such day, the security is valued using the closing bid price. Options are valued
at the last sale price on the exchange on which they are listed.  If no sales of
such options have taken place that day,  they will be valued at the mean between
their closing bid and asked prices.

REPURCHASE  AGREEMENTS.  The Fund may  enter  into  repurchase  agreements  with
primary  government  securities dealers recognized by the Federal Reserve Board,
with member banks of the Federal Reserve System or with other brokers or dealers
that meet credit guidelines established by the Adviser and reviewed by the Board
of Trustees.  Under the terms of a typical repurchase agreement,  the Fund takes
possession  of an  underlying  debt  obligation  subject to an obligation of the
seller to repurchase,  and the Fund to resell,  the obligation at an agreed-upon
price and time, thereby determining the yield during the Fund's holding period.


                                        5



THE GABELLI MATHERS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------
The Fund will always receive and maintain  securities as collateral whose market
value, including accrued interest,  will be at least equal to 102% of the dollar
amount  invested by the Fund in each  agreement.  The Fund will make payment for
such  securities  only upon  physical  delivery  or upon  evidence of book entry
transfer of the collateral to the account of the  custodian.  To the extent that
any repurchase transaction exceeds one business day, the value of the collateral
is marked-to-market on a daily basis to maintain the adequacy of the collateral.
If the seller defaults and the value of the collateral declines or if bankruptcy
proceedings   are  commenced  with  respect  to  the  seller  of  the  security,
realization of the collateral by the Fund may be delayed or limited.

FUTURES  CONTRACTS.  The Fund may engage in futures contracts for the purpose of
hedging  against  changes in the value of its  portfolio  securities  and in the
value of  securities  it  intends  to  purchase.  Upon  entering  into a futures
contract,  the Fund is required to deposit  with the broker an amount of cash or
cash equivalents equal to a certain  percentage of the contract amount.  This is
known as the "initial margin." Subsequent payments ("variation margin") are made
or  received by the Fund each day,  depending  on the daily  fluctuation  of the
value of the  contract.  The daily  changes  in the  contract  are  included  in
unrealized gains or losses. The Fund recognizes a realized gain or loss when the
contract is closed. At December 31, 2003, there were no open futures contracts.

There are several  risks in  connection  with the use of futures  contracts as a
hedging device. The change in value of futures contracts  primarily  corresponds
with the value of their underlying instruments, which may not correlate with the
change in value of the hedged investments.  In addition,  there is the risk that
the Fund may not be able to  enter  into a  closing  transaction  because  of an
illiquid secondary market.

SECURITIES  SOLD SHORT. A short sale involves  selling a security which the Fund
does not own. The proceeds  received for short sales are recorded as liabilities
and the Fund records an unrealized  gain or loss to the extent of the difference
between the proceeds  received  and the value of the open short  position on the
day of  determination.  The Fund records a realized  gain or loss when the short
position is closed out. By entering into a short sale, the Fund bears the market
risk of an unfavorable change in price of the security sold short.  Dividends on
short sales are recorded as an expense by the Fund on the  ex-dividend  date and
interest  expense is  recorded on the accrual  basis.  Securities  sold short at
December 31, 2003 are reflected in the Portfolio of Investments.

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME.  Securities  transactions  are
accounted  for on the  trade  date  with  realized  gain or loss on  investments
determined  by using the  identified  cost method.  Interest  income  (including
amortization  of premium  and  accretion  of  discount)  is  recorded as earned.
Dividend income is recorded on the ex-dividend date.

DIVIDENDS AND  DISTRIBUTIONS  TO  SHAREHOLDERS.  Dividends and  distributions to
shareholders  are recorded on the ex-dividend  date.  Income  distributions  and
capital  gain  distributions  are  determined  in  accordance  with  income  tax
regulations which may differ from generally  accepted  accounting  principles in
the United States.  These differences are primarily due to differing  treatments
of income and gains on various  investment  securities held by the Fund,  timing
differences and differing characterization of distributions made by the Fund. No
distributions were made in the fiscal years ended December 31, 2003 and 2002.


                                        6



THE GABELLI MATHERS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------
For the year ended  December 31, 2003,  reclassifications  were made to decrease
accumulated  net investment  loss for $456,610 and to decrease  accumulated  net
realized loss on investments  for $4,819,701,  with an offsetting  adjustment to
additional paid-in capital.

PROVISION  FOR  INCOME  TAXES.  The Fund  intends  to  continue  to qualify as a
regulated  investment company under Subchapter M of the Internal Revenue Code of
1986, as amended. As a result, a Federal income tax provision is not required.

As of December 31, 2003, the components of  accumulated  earnings/(losses)  on a
tax basis were as follows:

     Accumulated capital loss carryforward .....................   $(43,197,230)
     Net unrealized appreciation/(depreciation) of investments .        143,125
     Net unrealized appreciation/(depreciation) of securities
       sold short ..............................................       (390,684)
                                                                   ------------
     Total accumulated loss ....................................   $(43,444,789)
                                                                   ============

The Fund has a net capital loss  carryforward for Federal income tax purposes at
December 31, 2003 of $43,197,230. This capital loss carryforward is available to
reduce future distributions of net capital gains to shareholders. $22,226,886 of
the loss carryforward is available through 2004; $7,869,968 is available through
2006;  $12,430,175 is available  through 2010; and $670,201 is available through
2011.

3.  INVESTMENT  ADVISORY  AGREEMENT.  The Fund has  entered  into an  Investment
Advisory  Agreement (the "Advisory  Agreement")  with the Adviser which provides
that the Fund will pay the Adviser a fee,  computed  daily and paid monthly,  at
the  annual  rate of 1.00% of the value of the Fund's  average  net  assets.  In
accordance  with the  Advisory  Agreement,  the  Adviser  provides a  continuous
investment program for the Fund's portfolio,  oversees the administration of all
aspects of the Fund's  business  and  affairs and pays the  compensation  of all
Officers and Trustees of the Fund who are its affiliates.

4. DISTRIBUTION PLAN. On October 1, 1999, the Fund's Board of Trustees adopted a
distribution  plan (the  "Plan")  pursuant to Rule 12b-1 under the 1940 Act. For
the year ended December 31, 2003, the Fund incurred  distribution  costs payable
to Gabelli & Company,  Inc., an affiliate of the Adviser, of $186,869,  or 0.25%
of average daily net assets, the annual limitation under the Plan. Such payments
are accrued daily and paid monthly.

5. PORTFOLIO SECURITIES. Purchases and proceeds from the sales of securities for
the year ended December 31, 2003, other than short term  securities,  aggregated
$5,545,292 and $1,685,885, respectively.

6.  TRANSACTIONS  WITH AFFILIATES.  During the year ended December 31, 2003, the
Fund paid brokerage commissions of $7,353 to Gabelli & Company, Inc.

The cost of  calculating  the Fund's net asset value per share is a Fund expense
pursuant to the Investment Advisory  Agreement between the Fund and the Adviser.
During fiscal 2003, the Fund  reimbursed the Adviser  $34,800 in connection with
the  cost of  computing  the  Fund's  net  asset  value,  which is  included  in
miscellaneous expenses in the Statement of Operations.

                                       7




THE GABELLI MATHERS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- -=------------------------------------------------------------------------------

7. SHARES OF BENEFICIAL INTEREST.  Transactions in shares of beneficial interest
were as follows:


                                                               YEAR ENDED                        YEAR ENDED
                                                            DECEMBER 31, 2003                 DECEMBER 31, 2002
                                                     ----------------------------      ----------------------------
                                                        SHARES          AMOUNT            SHARES          AMOUNT
                                                     ----------      ------------      ----------      ------------
                                                                                           
Shares sold ......................................      271,933      $  2,922,779         729,693      $  8,237,339
Shares redeemed ..................................   (2,007,763)      (21,421,382)     (1,246,765)      (14,136,909)
                                                     ----------      ------------      ----------      ------------
    Net decrease .................................   (1,735,830)     $(18,498,603)       (517,072)     $ (5,899,570)
                                                     ==========      ============      ==========      ============


8.  FINANCIAL  HIGHLIGHTS.  Selected  data  for a share of  beneficial  interest
outstanding throughout each period:



                                                                          YEAR ENDED DECEMBER 31,
                                                      -----------------------------------------------------------------
                                                        2003          2002          2001          2000         1999(A)
                                                      -------       -------        -------       -------       --------
                                                                                                
OPERATING PERFORMANCE:
   Net asset value, beginning of period .........     $ 10.81       $ 12.25        $ 12.05       $ 11.94       $  11.73
                                                      -------       -------        -------       -------       --------
   Net investment income/(loss) .................       (0.07)        (0.00)(b)       0.30          0.49           0.46
   Net realized and unrealized
     gain/(loss) on investments .................       (0.14)        (1.44)          0.21          0.11           0.21
                                                      -------       -------        -------       -------       --------
   Total from investment operations .............       (0.21)        (1.44)          0.51          0.60           0.67
                                                      -------       -------        -------       -------       --------
DISTRIBUTIONS TO SHAREHOLDERS:
   Net investment income ........................          --            --          (0.31)        (0.49)         (0.46)
                                                      -------       -------        -------       -------       --------
   Total distributions ..........................          --            --          (0.31)        (0.49)         (0.46)
                                                      -------       -------        -------       -------       --------
   NET ASSET VALUE, END OF PERIOD ...............     $ 10.60       $ 10.81        $ 12.25       $ 12.05       $  11.94
                                                      =======       =======        =======       =======       ========
   Total return+ ................................     (1.94)%        (11.76)%         4.25%         5.02%          5.73%
                                                      =======       =======        =======       =======       ========
RATIOS TO AVERAGE NET ASSETS
   AND SUPPLEMENTAL DATA:
   Net assets, end of period (in 000's) .........     $60,846       $80,827        $97,893       $99,855       $104,693
   Ratio of net investment income/(loss)
     to average net assets ......................       (0.61)%       (0.00)%         2.45%         3.79%          3.50%
   Ratio of operating expenses
     to average net assets ......................        1.67%         1.63%          1.35%         1.34%          1.24%
   Portfolio turnover rate ......................         244%          776%          1013%          977%           922%


- --------------------------------------------------------------------------------
  + Total return  represents  aggregate  total return of a  hypothetical  $1,000
    investment  at the beginning of the period and sold at the end of the period
    including reinvestment of dividends.
(a) Gabelli Funds, LLC became the sole investment adviser of the Fund on October
    1, 1999.
(b) Amount is less than $0.005 per share.


                 See accompanying notes to financial statements.
                                        8



THE GABELLI MATHERS FUND
REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
- --------------------------------------------------------------------------------
To the Shareholders and Board of Trustees of
The Gabelli Mathers Fund

We have audited the accompanying statement of assets and liabilities,  including
the  portfolio of  investments,  of The Gabelli  Mathers Fund (the "Fund") as of
December 31, 2003,  and the related  statement 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 five years in the
period then ended. These financial  statements and financial  highlights are the
responsibility  of the Fund's  management.  Our  responsibility is to express an
opinion on these  financial  statements  and financial  highlights  based on our
audit.

We conducted our audits in accordance with auditing standards generally accepted
in the 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.  An  audit  includes
examining,  on a test basis,  evidence supporting the amounts and disclosures in
the financial  statements  and financial  highlights.  Our  procedures  included
confirmation of securities owned as of December 31, 2003, by correspondence with
the custodian  and brokers.  An audit also  includes  assessing  the  accounting
principles  used  and  significant  estimates  made  by  management,  as well as
evaluating the overall  financial  statement  presentation.  We believe that our
audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements and financial  highlights referred to
above present fairly, in all material  respects,  the financial  position of The
Gabelli Mathers Fund at December 31, 2003, 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 five years in the
period then ended, in conformity with accounting  principles  generally accepted
in the United States.

                                                          /s/ERNST & YOUNG


New York, New York
February 10, 2004


                                        9



THE GABELLI MATHERS FUND
ADDITIONAL FUND INFORMATION (UNAUDITED)
- --------------------------------------------------------------------------------
The  business  and affairs of the Fund are managed  under the  direction  of the
Fund's Board of Trustees. Information pertaining to the Trustees and Officers of
the Fund is set forth  below.  The Fund's  Statement of  Additional  Information
includes  additional  information  about the Fund's  Trustees and is  available,
without  charge,  upon  request,  by calling  800-GABELLI  (800-422-3554)  or by
writing to The Gabelli Mathers Fund at One Corporate Center, Rye, NY 10580-1422.



                       TERM OF         NUMBER OF
NAME, POSITION(S)     OFFICE AND     FUNDS IN FUND
    ADDRESS 1         LENGTH OF     COMPLEX OVERSEEN  PRINCIPAL OCCUPATION(S)                             OTHER DIRECTORSHIPS
    AND AGE          TIME SERVED 2     BY TRUSTEE     DURING PAST FIVE YEARS                                HELD BY TRUSTEE
- ----------------     -------------  ----------------  ----------------------                              --------------------
                                                                                            
INTERESTED TRUSTEES:3
- ---------------------
MARIO J. GABELLI, CFA  Since 1999          24         Chairman of the Board and Chief Executive         Director of Morgan Group
Trustee and Chairman                                  Officer of Gabelli Asset Management Inc. and      Holdings, Inc.
Age: 61                                               Chief Investment Officer of Gabelli Funds,        (transportation services);
                                                      LLC and GAMCO Investors, Inc.; Vice               Vice Chairman of Lynch
                                                      Chairman and Chief Executive Officer of           Corporation (diversified
                                                      Lynch Interactive Corporation (multimedia         manufacturing)
                                                      and services)

KARL OTTO POHL         Since 1999          33         Member of the Shareholder Committee of Sal        Director of Gabelli Asset
Trustee                                               Oppenheim Jr. & Cie (private investment           Management Inc. (investment
Age: 74                                               bank); Former President of the                    management); Chairman,
                                                      Deutsche Bundesbank and Chairman of its           Incentive Capital and
                                                      Central Bank Council (1980-1991)                  Incentive Asset Management
                                                                                                        (Zurich); Director at Sal
                                                                                                        Oppenheim Jr. & Cie, Zurich

HENRY G. VAN DER EB,    Since 1976          4         President and CEO of Gabelli Mathers                            --
CFA 4                                                 Fund since 1999; Senior Vice President and
Trustee, President and                                Portfolio Manager of Gabelli Funds, LLC
Chief Executive Officer                               and GAMCO Investors, Inc. since 1999;
Age: 58                                               Prior to October 1999, Chairman and Chief
                                                      Executive Officer of Mathers Fund, Inc. and
                                                      President of Mathers and Company, Inc.

NON-INTERESTED TRUSTEES:
- -----------------------
E. VAL CERUTTI          Since 2001           7        Chief Executive Officer of Cerutti Consultants,   Director of Lynch
Trustee                                               Inc.; Former President and Chief Operating        Corporation (diversified
Age: 64                                               Officer of Stella D'oro Biscuit Company           manufacturing)
                                                      (through 1992); Adviser, Iona College
                                                      School of Business

ANTHONY J. COLAVITA     Since 1999         35         President and Attorney at Law in the law firm                   --
Trustee                                               of Anthony J. Colavita, P.C.
Age: 68

VINCENT D. ENRIGHT      Since 1999         12         Former Senior Vice President and Chief                          --
Trustee                                               Financial Officer of KeySpan Energy
Age: 60                                               Corporation

ANTHONY R. PUSTORINO    Since 1999         17         Certified Public Accountant; Professor            Emeritus, Director of Lynch
Trustee                                               Pace University                                   Corporation (diversified
Age: 78                                                                                                 manufacturing)

WERNER J. ROEDER, MD    Since 1999         26         Vice President/Medical Affairs of Lawrence                      --
Trustee                                               Hospital Center and practicing private physician
Age: 63

ANTHONIE C. VAN EKRIS   Since 1999         20         Managing Director of BALMAC                       Director of Aurado
Trustee                                               International, Inc. (commodities)                 Exploration, Inc.
Age: 69                                                                                                 (oil and gas operations)



                                        10




THE GABELLI MATHERS FUND
ADDITIONAL FUND INFORMATION (UNAUDITED) (CONTINUED)
- --------------------------------------------------------------------------------
                       TERM OF         NUMBER OF
NAME, POSITION(S)     OFFICE AND     FUNDS IN FUND
    ADDRESS 1         LENGTH OF     COMPLEX OVERSEEN  PRINCIPAL OCCUPATION(S)                             OTHER DIRECTORSHIPS
    AND AGE          TIME SERVED 2    BY TRUSTEE      DURING PAST FIVE YEARS                                HELD BY TRUSTEE
- ----------------     -------------  ----------------  ----------------------                              --------------------
OFFICERS:
- --------
BRUCE N. ALPERT         Since 1999          --        Executive Vice President and Chief Operating                    --
Executive Vice                                        Officer of Gabelli Funds, LLC since 1988 and
President                                             an officer of all mutual funds advised by
and Treasurer                                         Gabelli Funds, LLC and its affiliates.
Age: 52                                               Director and President of Gabelli Advisers, Inc.

EDITH L. COOK 4         Since 1984          --        Vice President of Gabelli Mathers Fund since 1999.              --
Vice President                                        Prior to October 1999, Vice President and
Age: 62                                               Treasurer of Mathers Fund, Inc. and Vice
                                                      President of Mathers and Company, Inc.

JAMES E. MCKEE          Since 1999          --        Vice President, General Counsel and Secretary                   --
Vice President and                                    of Gabelli Asset Management Inc. since 1999
Secretary                                             and GAMCO Investors, Inc. since 1993; Secretary
Age: 40                                               of all mutual funds advised by Gabelli Advisers,
                                                      Inc. and Gabelli Funds, LLC

ANNE E. MORRISSY,       Since 1987          --        Executive Vice President of Gabelli Mathers Fund                --
CFA 4                                                 and Vice President of Gabelli Asset Management Inc.
Executive Vice                                        ince 1999. Prior to October 1999, Executive Vice
President                                             President, Secretary and Director of Mathers
Age: 42                                               Fund, Inc. and Vice President of Mathers and
                                                      Company, Inc.

HEIDI M. STUBNER 4      Since 1995          --        Vice President of Gabelli Mathers Fund since 1999.               --
Vice President                                        Prior to October 1999, Vice President of
Age: 35                                               Mathers Fund, Inc.


- --------------------------------------------------------------------------------
  1 Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.
  2 Each Trustee will hold office for an  indefinite  term until the earliest of
    (i) the next  meeting of  shareholders  if any,  called  for the  purpose of
    considering  the  election  or  re-election  of such  Trustee  and until the
    election and qualification of his or her successor,  if any, elected at such
    meeting,  or (ii) the date a Trustee  resigns  or  retires,  or a Trustee is
    removed by the Board of Trustees or  shareholders,  in  accordance  with the
    Fund's By-Laws and Declaration of Trust.
  3 "Interested  person" of the Fund as defined in the Investment Company Act of
    1940.  Messrs.  Gabelli,  Pohl  and  Van  der  Eb  are  each  considered  an
    "interested  person" because of their  affiliation  with Gabelli Funds,  LLC
    which acts as the Fund's investment adviser.
  4 Address: 2801 Lakeside Drive, Suite 201, Bannockburn, IL 60015.


                                       11



                            THE GABELLI MATHERS FUND
                              One Corporate Center
                            Rye, New York 10580-1422
                                   800-GABELLI
                                  800-422-3554
                                FAX: 914-921-5118
                            WEBSITE: WWW.GABELLI.COM
                            E-MAIL: INFO@GABELLI.COM
                   Net Asset Value available daily by calling
                           800-GABELLI after 6:00 P.M.

                       BOARD OF TRUSTEES

   Mario J. Gabelli, CFA              Anthony R. Pustorino
   CHAIRMAN AND CHIEF                 CERTIFIED PUBLIC ACCOUNTANT
   INVESTMENT OFFICER                 PROFESSOR, PACE UNIVERSITY
   GABELLI ASSET MANAGEMENT INC.

   E.  Val  Cerutti                   Werner  J.  Roeder, MD
   CHIEF   EXECUTIVE OFFICER          VICE PRESIDENT/MEDICAL AFFAIRS
   CERUTTI CONSULTANTS, INC.          LAWRENCE HOSPITAL CENTER

   Anthony J. Colavita                Henry G. Van der Eb, CFA
   ATTORNEY-AT-LAW                    PRESIDENT AND CHIEF
   ANTHONY J. COLAVITA, P.C.          EXECUTIVE OFFICER
                                      THE GABELLI MATHERS FUND

   Vincent D. Enright                 Anthonie C. van Ekris
   FORMER SENIOR VICE PRESIDENT       MANAGING DIRECTOR
   AND CHIEF FINANCIAL OFFICER        BALMAC INTERNATIONAL, INC.
   KEYSPAN ENERGY CORP.

   Karl Otto Pohl
   FORMER PRESIDENT
   DEUTSCHE BUNDESBANK

                OFFICERS AND PORTFOLIO MANAGER

   Henry G. Van der Eb, CFA           Anne E. Morrissy, CFA
   PRESIDENT AND                      EXECUTIVE VICE PRESIDENT
   PORTFOLIO MANAGER

   Bruce N. Alpert                    James E. McKee
   EXECUTIVE VICE PRESIDENT           VICE PRESIDENT
   AND TREASURER                      AND SECRETARY

   Heidi M. Stubner                   Edith L. Cook
   VICE PRESIDENT                     VICE PRESIDENT

                        DISTRIBUTOR
               Gabelli & Company, Inc.

    CUSTODIAN, TRANSFER AGENT AND DIVIDEND AGENT
         State Street Bank and Trust Company

                    LEGAL COUNSEL
      Skadden, Arps, Slate, Meagher & Flom LLP


[GRAPHIC
OMITTED]

MARIO GABELLI PHOTO

THE
GABELLI
MATHERS
FUND

- --------------------------------------------------------------------------------
This report is submitted for the general  information of the shareholders of The
Gabelli  Mathers Fund. It is not  authorized  for  distribution  to  prospective
investors unless preceded or accompanied by an effective prospectus.
- --------------------------------------------------------------------------------

GAB1726Q403SR


                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 2003



ITEM 2. CODE OF ETHICS.

     (a) The registrant, as of the end of the period covered by this report, has
         adopted a code of ethics  that  applies to the  registrant's  principal
         executive officer,  principal financial officer,  principal  accounting
         officer  or  controller,   or  persons  performing  similar  functions,
         regardless of whether these  individuals are employed by the registrant
         or a third party.

     (b) No response required.

     (c) There have been no amendments, during the period covered by this
         report, to a provision of the code of ethics that applies to the
         registrant's principal executive officer, principal financial officer,
         principal accounting officer or controller, or persons performing
         similar functions, regardless of whether these individuals are employed
         by the registrant or a third party, and that relates to any element of
         the code of ethics description.

     (d) The registrant has not granted any waivers, including an implicit
         waiver, from a provision of the code of ethics that applies to the
         registrant's principal executive officer, principal financial officer,
         principal accounting officer or controller, or persons performing
         similar functions, regardless of whether these individuals are employed
         by the registrant or a third party, that relates to one or more of the
         items set forth in paragraph (b) of this item's instructions.

ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

As of the end of the period covered by the report, the registrant's board of
trustees has determined that Anthony R. Pustorino is qualified to serve as an
audit committee financial expert serving on its audit committee and that he is
"independent," as defined by this Item 3.

ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

     (a) AUDIT FEES: The aggregate fees billed for each of the last two fiscal
         years for professional services rendered by the principal accountant
         for the audit of the registrant's annual financial statements or
         services that are normally provided by the accountant in connection
         with statutory and regulatory filings or engagements for those fiscal
         years are $24,500 in 2003 and $23,000 in 2002.




     (b) AUDIT-RELATED FEES: The aggregate fees billed in each of the last two
         fiscal years for assurance and related services by the principal
         accountant that are reasonably related to the performance of the audit
         of the registrant's financial statements and are not reported under
         paragraph (a) of this Item are $0 in 2003 and $0 in 2002.

     (c) TAX FEES: The aggregate fees billed in each of the last two fiscal
         years for professional services rendered by the principal accountant
         for tax compliance, tax advice, and tax planning are $3,500 in 2003 and
         $3,500 in 2002.

         Tax fees represent tax compliance services provided in connection with
         the review of the Registrant's tax returns.

     (d) ALL  OTHER  FEES:  The  aggregate  fees  billed in each of the last two
         fiscal  years for  products  and  services  provided  by the  principal
         accountant,  other than the services reported in paragraphs (a) through
         (c) of this Item are $0 in 2003 and $0 in 2002.

     (e)(1)   Disclose the audit committee's pre-approval policies and
              procedures described in paragraph (c)(7) of Rule 2-01 of
              Regulation S-X.

              Pre-Approval Policies and Procedures. The Audit Committee
              ("Committee") of the registrant is responsible for pre-approving
              (i) all audit and permissible non-audit services to be provided by
              the independent auditors to the registrant and (ii) all
              permissible non-audit services to be provided by the independent
              auditors to Gabelli and any affiliate of Gabelli that provides
              services to the registrant (a "Covered Services Provider") if the
              independent auditors' engagement relates directly to the
              operations and financial reporting of the registrant. The
              Committee may delegate its responsibility to pre-approve any such
              audit and permissible non-audit services to the Chairperson of the
              Committee, and the Chairperson must report to the Committee, at
              its next regularly scheduled meeting after the Chairperson's
              pre-approval of such services, his or her decision(s). The
              Committee may also establish detailed pre-approval policies and
              procedures for pre-approval of such services in accordance with
              applicable laws, including the delegation of some or all of the
              Committee's pre-approval responsibilities to other persons (other
              than Gabelli or the registrant's officers). Pre-approval by the
              Committee of any permissible non-audit services is not required so
              long as: (i) the aggregate amount of all such permissible
              non-audit services provided to the registrant, Gabelli and any
              Covered Services Provider constitutes not more than 5% of the
              total amount of revenues paid by the registrant to its independent
              auditors during the fiscal year in which the permissible non-audit
              services are provided; (ii) the permissible non-audit services
              were not recognized by the registrant at the time of the
              engagement to be non-audit services; and (iii) such services are
              promptly brought to the attention of the Committee and approved by
              the Committee or the Chairperson prior to the completion of the
              audit.




     (e)(2)   The percentage of services described in each of paragraphs (b)
              through (d) of this Item that were approved by the audit committee
              pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X
              are as follows:

                           (b) N/A

                           (c) 100%

                           (d) N/A

     (f) The percentage of hours expended on the principal accountant's
         engagement to audit the registrant's financial statements for the most
         recent fiscal year that were attributed to work performed by persons
         other than the principal accountant's full-time, permanent employees
         was zero percent (0%).

     (g) The aggregate non-audit fees billed by the registrant's accountant for
         services rendered to the registrant, and rendered to the registrant's
         investment adviser (not including any sub-adviser whose role is
         primarily portfolio management and is subcontracted with or overseen by
         another investment adviser), and any entity controlling, controlled by,
         or under common control with the adviser that provides ongoing services
         to the registrant for each of the last two fiscal years of the
         registrant was $62,500 in 2003 and $66,000 in 2002.

     (h) The  registrant's  audit  committee  of  the  board  of  directors  HAS
         considered  whether  the  provision  of  non-audit  services  that were
         rendered to the  registrant's  investment  adviser (not  including  any
         sub-adviser  whose  role  is  primarily  portfolio  management  and  is
         subcontracted with or overseen by another investment adviser),  and any
         entity  controlling,  controlled  by, or under common  control with the
         investment  adviser that provides  ongoing  services to the  registrant
         that were not  pre-approved  pursuant to paragraph  (c)(7)(ii)  of Rule
         2-01 of Regulation  S-X is compatible  with  maintaining  the principal
         accountant's independence.

ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable.

ITEM 6. [RESERVED]

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

Not applicable.





ITEM 8. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT
COMPANY AND AFFILIATED PURCHASERS.

Not applicable.

ITEM 9. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

Not yet applicable.

ITEM 10. CONTROLS AND PROCEDURES.

     (a)  The registrant's principal executive and principal financial officers,
          or persons performing similar functions, 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 (the
          "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within
          90 days of the filing date of the report that includes the disclosure
          required by this paragraph, based on their evaluation of these
          controls and procedures required by Rule 30a-3(b) under the 1940 Act
          (17 CFR 270.30a-3(b)) and Rules 13a-15(b) or 15d-15(b) under the
          Securities Exchange Act of 1934, as amended (17 CFR 240.13a-15(b) or
          240.15d-15(b)).

     (b)  There were no changes in the registrant's internal control over
          financial reporting (as defined in Rule 30a-3(d) under the 1940 Act
          (17 CFR 270.30a-3(d)) that occurred during the registrant's last
          fiscal half-year (the registrant's second fiscal half-year in the case
          of an annual report) that has materially affected, or is reasonably
          likely to materially affect, the registrant's internal control over
          financial reporting.

ITEM 11. EXHIBITS.

     (a)(1)   Code of ethics,  or any amendment  thereto,  that is the subject
              of disclosure  required by Item 2 is attached hereto.

     (a)(2)   Certifications pursuant to Rule 30a-2(a) of the Investment Company
              Act of 1940, as amended, are attached hereto.

     (a)(3)   Not applicable.

     (b)      Certifications pursuant to Rule 30a-2(b) of the Investment Company
              Act of 1940, as amended, are attached hereto.





                                   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.

(registrant)                                The Gabelli Mathers Fund
            --------------------------------------------------------------------

By (Signature and Title)*                   /s/ Bruce N. Alpert
                         -------------------------------------------------------
                                            Bruce N. Alpert, Principal Executive
                                            Officer


Date                                        March 9, 2004
    ----------------------------------------------------------------------------


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 (Signature and Title)*                   /s/ Bruce N. Alpert
                         -------------------------------------------------------
                                            Bruce N. Alpert, Principal Executive
                                            Officer and Principal Financial
                                            Officer


Date                                        March 9, 2004
     ---------------------------------------------------------------------------



* Print the name and title of each signing officer under his or her signature.