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

                                    Form 13F

                               Form 13F COVER PAGE


Report for the Calendar Year or Quarter Ended:  June 30, 2005
                                                --------------

Check here if Amendment [ ]; Amendment Number:              
                                                  ------------
  This Amendment (Check only one.): [ ]  is a restatement.
                                    [ ]  adds new holdings entries.


Institutional Investment Manager Filing this Report:

Name:     Hennessy Advisors, Inc.
Address:  The Courtyard Square
          750 Grant Avenue, Suite 100
          Novato, CA  94945

Form 13F File Number:  028-06715

The institutional investment manager filing this report and the person by whom
it is signed hereby represent that the person signing the report is authorized
to submit it, that all information contained herein is true, correct and
complete, and that it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:

Name:     Teresa M. Nilsen
Title:    Executive Vice President and Chief Financial Officer
Phone:    (415) 899-1555

Signature, Place, and Date of Signing:


/s/ Teresa M. Nilsen                  Novato, CA                   July 25, 2005
--------------------------------------------------------------------------------
Teresa M. Nilsen                      City, State                      Date


Report Type  (Check only one):

[X]  13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager
     are reported in this report.)

[ ]  13F NOTICE. (Check here if no holdings reported are in this report, and all
     holdings are reported by other reporting manager(s).)

[ ]  13F COMBINATION REPORT. (Check here if a portion of the holdings for this
     reporting manager are reported in this report and a portion are reported by
     other reporting manager(s).)






                              FORM 13F SUMMARY PAGE



Report Summary:


Number of Other Included Managers:                              0
                                                 ----------------------

Form 13F Information Table Entry Total:                       135
                                                 ----------------------

Form 13F Information Table Value Total:                $1,345,014
                                                 ----------------------
                                                       (thousands)



List of Other Included Managers:  NONE







Page 1 of 7


                                                     FORM 13F INFORMATION TABLE

                                         Name of Reporting Manager: Hennessy Advisors, Inc.

                                                                                                    Column
      Column 1:         Column 2:    Column 3:   Column 4:    Column 5:              Column 6:         7:         Column 8:
----------------------------------------------------------------------------------------------------------------------------------
                          Title                   Market                                           
                           of         CUSIP       Value       Shares or                              Other
    Name of Issuer        Class       Number    (x$1,000)  Principal Amount  Investment Discretion   Mgrs.    Voting Authority
----------------------------------------------------------------------------------------------------------------------------------
                                                                   SH/ Put/        Shared   Shared     
                                                                   PRN Call  Sole  Defined   Other         Sole  Shared    None
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
ADOBE SYSTEMS INC         COMMON     00724F101       114      4,000 SH       SOLE                                  0        4,000
----------------------------------------------------------------------------------------------------------------------------------
AETNA INC                 COMMON     00817Y108    25,078    302,800 SH       SOLE                            302,800            0
----------------------------------------------------------------------------------------------------------------------------------
AK STEEL HOLDING CORP     COMMON     001547108     8,368  1,305,400 SH       SOLE                          1,305,400            0
----------------------------------------------------------------------------------------------------------------------------------
ALBERTSONS INC            COMMON     013104104     3,354    162,200 SH       SOLE                            162,200            0
----------------------------------------------------------------------------------------------------------------------------------
ALLEGHENY ENERGY INC      COMMON     017361106     2,106    114,146 SH       SOLE                            113,800          346
----------------------------------------------------------------------------------------------------------------------------------
ALLIANCE IMAGING INC      COMMON     018606202    17,563  1,679,100 SH       SOLE                          1,679,100            0
----------------------------------------------------------------------------------------------------------------------------------
ALLTEL CORP               COMMON     020039103     4,081     65,530 SH       SOLE                             64,700          830
----------------------------------------------------------------------------------------------------------------------------------
ALTRIA GROUP INC          COMMON     02209S103    12,946    200,213 SH       SOLE                            199,025        1,188
----------------------------------------------------------------------------------------------------------------------------------
AMERADA HESS CORP         COMMON     023551104     1,770     20,600 SH       SOLE                             20,600            0
----------------------------------------------------------------------------------------------------------------------------------
AMERIGROUP CORP           COMMON     03073T102    20,072    499,300 SH       SOLE                            499,300            0
----------------------------------------------------------------------------------------------------------------------------------
AON CORP                  COMMON     037389103     4,174    166,700 SH       SOLE                            166,700            0
----------------------------------------------------------------------------------------------------------------------------------
ASHLAND INC               COMMON     044209104     1,950     32,400 SH       SOLE                             32,400            0
----------------------------------------------------------------------------------------------------------------------------------
AT&T CORP                 COMMON     001957505     8,002    420,293 SH       SOLE                            419,100        1,193
----------------------------------------------------------------------------------------------------------------------------------
BANK OF AMERICA CORP      COMMON     060505104     4,424     96,991 SH       SOLE                             83,600       13,391
----------------------------------------------------------------------------------------------------------------------------------
BB&T CORP                 COMMON     054937107     3,589     89,800 SH       SOLE                             89,800            0
----------------------------------------------------------------------------------------------------------------------------------
BELLSOUTH CORP            COMMON     079860102     3,648    137,291 SH       SOLE                            133,400        3,891
----------------------------------------------------------------------------------------------------------------------------------
BLACK & DECKER CORP       COMMON     091797100    20,894    237,700 SH       SOLE                            237,700            0
----------------------------------------------------------------------------------------------------------------------------------
BLOUNT INTL INC           COMMON     095180105    18,097  1,084,300 SH       SOLE                          1,084,300            0
----------------------------------------------------------------------------------------------------------------------------------
BLUEGREEN CORP            COMMON     096231105    16,585    952,600 SH       SOLE                            952,600            0
----------------------------------------------------------------------------------------------------------------------------------
BP PLC  -ADS               ADR       055622104     4,453     71,388 SH       SOLE                             64,900        6,488
----------------------------------------------------------------------------------------------------------------------------------
BRINKS CO                 COMMON     109696104    17,208    478,000 SH       SOLE                            478,000            0
----------------------------------------------------------------------------------------------------------------------------------





Page 2 of 7


                                                     FORM 13F INFORMATION TABLE

                                         Name of Reporting Manager: Hennessy Advisors, Inc.

                                                                                                    Column
      Column 1:         Column 2:    Column 3:   Column 4:    Column 5:              Column 6:         7:         Column 8:
----------------------------------------------------------------------------------------------------------------------------------
                          Title                   Market                                           
                           of         CUSIP       Value       Shares or                              Other
    Name of Issuer        Class       Number    (x$1,000)  Principal Amount  Investment Discretion   Mgrs.    Voting Authority
----------------------------------------------------------------------------------------------------------------------------------
                                                                   SH/ Put/        Shared   Shared     
                                                                   PRN Call  Sole  Defined   Other         Sole  Shared    None
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
BRISTOL MYERS SQUIBB      COMMON     110122108     3,957    158,400 SH       SOLE                            157,600          800
----------------------------------------------------------------------------------------------------------------------------------
BRUNSWICK CORP            COMMON     117043109     1,729     41,400 SH       SOLE                             41,400            0
----------------------------------------------------------------------------------------------------------------------------------
BUILDING MATERIALS HLDG 
CP                        COMMON     120113105    34,181    493,300 SH       SOLE                            493,300            0
----------------------------------------------------------------------------------------------------------------------------------
BUNGE LTD                 COMMON     G16962105    21,004    331,300 SH       SOLE                            331,300            0
----------------------------------------------------------------------------------------------------------------------------------
C B RICHARD ELLIS SVCS    COMMON     12489L108       439     10,000 SH       SOLE                                  0       10,000
----------------------------------------------------------------------------------------------------------------------------------
CARPENTER TECHNOLOGY CORP COMMON     144285103    16,737    323,100 SH       SOLE                            323,100            0
----------------------------------------------------------------------------------------------------------------------------------
CEMEX S A  -ADR            ADR       151290889     4,789    112,900 SH       SOLE                            112,900            0
----------------------------------------------------------------------------------------------------------------------------------
CENTENE CORP              COMMON     15135B101    22,374    666,300 SH       SOLE                            666,300            0
----------------------------------------------------------------------------------------------------------------------------------
CHAMPION ENTERPRISES INC  COMMON     158496109    15,885  1,598,100 SH       SOLE                          1,598,100            0
----------------------------------------------------------------------------------------------------------------------------------
CHARLES SCHWAB CORP       COMMON     808513105       114     10,100 SH       SOLE                                  0       10,100
----------------------------------------------------------------------------------------------------------------------------------
CHEVRONTEXACO CORP        COMMON     166764100     4,932     88,197 SH       SOLE                             72,200       15,997
----------------------------------------------------------------------------------------------------------------------------------
CIRCUIT CITY STORES INC   COMMON     172737108     1,735    121,200 SH       SOLE                            121,200            0
----------------------------------------------------------------------------------------------------------------------------------
CITIGROUP INC             COMMON     172967101    11,492    248,575 SH       SOLE                            247,450        1,125
----------------------------------------------------------------------------------------------------------------------------------
CLEVELAND-CLIFFS INC      COMMON     185896107    21,007    363,700 SH       SOLE                            363,700            0
----------------------------------------------------------------------------------------------------------------------------------
COCA-COLA COMPANY         COMMON     191216100     3,311     79,300 SH       SOLE                             78,200        1,100
----------------------------------------------------------------------------------------------------------------------------------
COMMERCIAL METALS         COMMON     201723103    17,798    747,200 SH       SOLE                            747,200            0
----------------------------------------------------------------------------------------------------------------------------------
CONAGRA FOODS INC         COMMON     205887102     3,198    138,100 SH       SOLE                            138,100            0
----------------------------------------------------------------------------------------------------------------------------------
CONSOL ENERGY INC         COMMON     20854P109    24,658    460,200 SH       SOLE                            460,200            0
----------------------------------------------------------------------------------------------------------------------------------
DICKS SPORTING GOODS INC  COMMON     253393102     1,657     50,600 SH       SOLE                             50,600            0
----------------------------------------------------------------------------------------------------------------------------------
DONNELLEY (R R) & SONS CO COMMON     257867101     3,851    111,600 SH       SOLE                            111,600            0
----------------------------------------------------------------------------------------------------------------------------------
DOW CHEMICAL              COMMON     260543103     3,482     78,200 SH       SOLE                             78,200            0
----------------------------------------------------------------------------------------------------------------------------------
DU PONT (E I) DE NEMOURS  COMMON     263534109    10,909    253,635 SH       SOLE                            252,050        1,585
----------------------------------------------------------------------------------------------------------------------------------





Page 3 of 7


                                                     FORM 13F INFORMATION TABLE

                                         Name of Reporting Manager: Hennessy Advisors, Inc.

                                                                                                    Column
      Column 1:         Column 2:    Column 3:   Column 4:    Column 5:              Column 6:         7:         Column 8:
----------------------------------------------------------------------------------------------------------------------------------
                          Title                   Market                                           
                           of         CUSIP       Value       Shares or                              Other
    Name of Issuer        Class       Number    (x$1,000)  Principal Amount  Investment Discretion   Mgrs.    Voting Authority
----------------------------------------------------------------------------------------------------------------------------------
                                                                   SH/ Put/        Shared   Shared     
                                                                   PRN Call  Sole  Defined   Other         Sole  Shared    None
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
ELECTRONICS BOUTIQUE HLDG 
CP                        COMMON     286045109    27,929    439,900 SH       SOLE                            439,900            0
----------------------------------------------------------------------------------------------------------------------------------
EMERSON ELECTRIC          COMMON     291011104     1,287     20,550 SH       SOLE                                  0       20,550
----------------------------------------------------------------------------------------------------------------------------------
EXXON MOBIL CORPORATION   COMMON     30231G102     6,365    110,758 SH       SOLE                            103,550        7,208
----------------------------------------------------------------------------------------------------------------------------------
FANNIE MAE                COMMON     313586109     3,183     54,500 SH       SOLE                             54,500            0
----------------------------------------------------------------------------------------------------------------------------------
FMC TECHNOLOGIES INC      COMMON     30249U101     1,606     54,300 SH       SOLE                             54,300            0
----------------------------------------------------------------------------------------------------------------------------------
FORD MOTOR CO             COMMON     345370860     2,744    267,946 SH       SOLE                            267,700          246
----------------------------------------------------------------------------------------------------------------------------------
GENERAL ELECTRIC CO.      COMMON     369604103     5,132    148,109 SH       SOLE                            147,575          534
----------------------------------------------------------------------------------------------------------------------------------
GENERAL MILLS INC         COMMON     370334104     3,696     79,000 SH       SOLE                             79,000            0
----------------------------------------------------------------------------------------------------------------------------------
GENERAL MOTORS CORP       COMMON     370442105    10,278    302,287 SH       SOLE                            300,150        2,137
----------------------------------------------------------------------------------------------------------------------------------
GENESCO INC               COMMON     371532102    22,499    606,600 SH       SOLE                            606,600            0
----------------------------------------------------------------------------------------------------------------------------------
GEORGIA GULF CORP         COMMON     373200203    11,777    379,300 SH       SOLE                            379,300            0
----------------------------------------------------------------------------------------------------------------------------------
GOODYEAR TIRE & RUBBER CO COMMON     382550101     1,957    164,400 SH       SOLE                            164,400            0
----------------------------------------------------------------------------------------------------------------------------------
GRACE (W R) & CO          COMMON     38388F108    10,812  1,387,900 SH       SOLE                          1,387,900            0
----------------------------------------------------------------------------------------------------------------------------------
GREENBRIER COMPANIES INC  COMMON     393657101    15,122    558,000 SH       SOLE                            558,000            0
----------------------------------------------------------------------------------------------------------------------------------
HARRIS CORP               COMMON     413875105     1,933     66,300 SH       SOLE                             66,300            0
----------------------------------------------------------------------------------------------------------------------------------
HEINZ (H J) CO            COMMON     423074103     3,553    100,300 SH       SOLE                            100,300            0
----------------------------------------------------------------------------------------------------------------------------------
HENNESSY ADVISORS INC     COMMON     425885100    37,715  1,479,030 SH       SOLE                                  0       79,030
----------------------------------------------------------------------------------------------------------------------------------
HEXCEL CORP               COMMON     428291108    22,042  1,302,700 SH       SOLE                          1,302,700            0
----------------------------------------------------------------------------------------------------------------------------------
HSBC HOLDINGS PLC  -ADR    ADR       404280406     3,616     45,400 SH       SOLE                             45,400            0
----------------------------------------------------------------------------------------------------------------------------------
HUGHES SUPPLY INC         COMMON     444482103     1,550     58,400 SH       SOLE                             58,400            0
----------------------------------------------------------------------------------------------------------------------------------
HUNT (JB) TRANSPRT SVCS 
INC                       COMMON     445658107    16,197    842,300 SH       SOLE                            842,300            0
----------------------------------------------------------------------------------------------------------------------------------





Page 4 of 7


                                                     FORM 13F INFORMATION TABLE

                                         Name of Reporting Manager: Hennessy Advisors, Inc.

                                                                                                    Column
      Column 1:         Column 2:    Column 3:   Column 4:    Column 5:              Column 6:         7:         Column 8:
----------------------------------------------------------------------------------------------------------------------------------
                          Title                   Market                                           
                           of         CUSIP       Value       Shares or                              Other
    Name of Issuer        Class       Number    (x$1,000)  Principal Amount  Investment Discretion   Mgrs.    Voting Authority
----------------------------------------------------------------------------------------------------------------------------------
                                                                   SH/ Put/        Shared   Shared     
                                                                   PRN Call  Sole  Defined   Other         Sole  Shared    None
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
INTL PAPER CO             COMMON     460146103     2,992     99,025 SH       SOLE                             98,150          875
----------------------------------------------------------------------------------------------------------------------------------
IPSCO INC                  ADR       462622101    17,270    395,200 SH       SOLE                            395,200            0
----------------------------------------------------------------------------------------------------------------------------------
J P MORGAN CHASE & CO     COMMON     46625H100    10,862    307,545 SH       SOLE                            305,500        2,045
----------------------------------------------------------------------------------------------------------------------------------
JONES LANG LASALLE INC    COMMON     48020Q107    22,332    504,900 SH       SOLE                            504,900            0
----------------------------------------------------------------------------------------------------------------------------------
JOY GLOBAL INC            COMMON     481165108     2,563     81,900 SH       SOLE                             81,900            0
----------------------------------------------------------------------------------------------------------------------------------
KERR-MCGEE CORP           COMMON     492386107     4,968     65,100 SH       SOLE                             65,100            0
----------------------------------------------------------------------------------------------------------------------------------
KIMBERLY-CLARK CORP       COMMON     494368103     3,770     60,226 SH       SOLE                             59,100        1,126
----------------------------------------------------------------------------------------------------------------------------------
LANDSTAR SYSTEM INC       COMMON     515098101    15,482    513,000 SH       SOLE                            513,000            0
----------------------------------------------------------------------------------------------------------------------------------
LILLY (ELI) & CO          COMMON     532457108     3,749     67,300 SH       SOLE                             67,300            0
----------------------------------------------------------------------------------------------------------------------------------
LINCOLN NATIONAL CORP     COMMON     534187109     3,772     80,400 SH       SOLE                             80,400            0
----------------------------------------------------------------------------------------------------------------------------------
LONE STAR TECHNOLOGIES    COMMON     542312103     1,766     50,200 SH       SOLE                             50,200            0
----------------------------------------------------------------------------------------------------------------------------------
LYONDELL CHEMICAL CO      COMMON     552078107    19,421    740,100 SH       SOLE                            740,100            0
----------------------------------------------------------------------------------------------------------------------------------
MARATHON OIL CORP         COMMON     565849106     5,524    103,500 SH       SOLE                            103,500            0
----------------------------------------------------------------------------------------------------------------------------------
MARSH & MCLENNAN COS      COMMON     571748102     3,371    121,700 SH       SOLE                            121,700            0
----------------------------------------------------------------------------------------------------------------------------------
MASSEY ENERGY CO          COMMON     576206106     2,226     62,400 SH       SOLE                             62,400            0
----------------------------------------------------------------------------------------------------------------------------------
MAVERICK TUBE CORP        COMMON     577914104     1,736     59,900 SH       SOLE                             59,900            0
----------------------------------------------------------------------------------------------------------------------------------
MAY DEPARTMENT STORES CO  COMMON     577778103     5,373    133,800 SH       SOLE                            133,800            0
----------------------------------------------------------------------------------------------------------------------------------
MCDERMOTT INTL INC        COMMON     580037109    21,605  1,028,800 SH       SOLE                          1,028,800            0
----------------------------------------------------------------------------------------------------------------------------------
MEADWESTVACO CORP         COMMON     583334107     3,278    116,900 SH       SOLE                            116,900            0
----------------------------------------------------------------------------------------------------------------------------------
MERCK & CO                COMMON     589331107    10,189    330,808 SH       SOLE                            328,700        2,108
----------------------------------------------------------------------------------------------------------------------------------
MERITAGE HOMES CORP       COMMON     59001A102    26,648    335,200 SH       SOLE                            335,200            0
----------------------------------------------------------------------------------------------------------------------------------





Page 5 of 7


                                                     FORM 13F INFORMATION TABLE

                                         Name of Reporting Manager: Hennessy Advisors, Inc.

                                                                                                    Column
      Column 1:         Column 2:    Column 3:   Column 4:    Column 5:              Column 6:         7:         Column 8:
----------------------------------------------------------------------------------------------------------------------------------
                          Title                   Market                                           
                           of         CUSIP       Value       Shares or                              Other
    Name of Issuer        Class       Number    (x$1,000)  Principal Amount  Investment Discretion   Mgrs.    Voting Authority
----------------------------------------------------------------------------------------------------------------------------------
                                                                   SH/ Put/        Shared   Shared     
                                                                   PRN Call  Sole  Defined   Other         Sole  Shared    None
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
MOLINA HEALTHCARE INC     COMMON     60855R100    18,027    407,300 SH       SOLE                            407,300            0
----------------------------------------------------------------------------------------------------------------------------------
NATIONAL CITY CORP        COMMON     635405103     3,531    103,500 SH       SOLE                            103,500            0
----------------------------------------------------------------------------------------------------------------------------------
NCR CORP                  COMMON     62886E108    19,166    545,732 SH       SOLE                            545,700           32
----------------------------------------------------------------------------------------------------------------------------------
NOVA CHEMICALS CORP        ADR       66977W109    12,206    399,400 SH       SOLE                            399,400            0
----------------------------------------------------------------------------------------------------------------------------------
NOVAMERICAN STEEL INC      ADR       669959108     9,285    336,400 SH       SOLE                            336,400            0
----------------------------------------------------------------------------------------------------------------------------------
NUCOR CORP                COMMON     670346105    18,513    400,800 SH       SOLE                            400,800            0
----------------------------------------------------------------------------------------------------------------------------------
NVR INC                   COMMON     62944T105    19,926     24,600 SH       SOLE                             24,600            0
----------------------------------------------------------------------------------------------------------------------------------
OLD DOMINION FREIGHT      COMMON     679580100    14,563    542,800 SH       SOLE                            542,800            0
----------------------------------------------------------------------------------------------------------------------------------
OREGON STEEL MILLS INC    COMMON     686079104    16,023    931,000 SH       SOLE                            931,000            0
----------------------------------------------------------------------------------------------------------------------------------
P G & E CORP              COMMON     69331C108       225      6,005 SH       SOLE                                  0        6,005
----------------------------------------------------------------------------------------------------------------------------------
PEABODY ENERGY CORP       COMMON     704549104     2,494     60,400 SH       SOLE                             60,400            0
----------------------------------------------------------------------------------------------------------------------------------
PENN NATIONAL GAMING INC  COMMON     707569109     2,342     89,400 SH       SOLE                             89,400            0
----------------------------------------------------------------------------------------------------------------------------------
PFIZER INC                COMMON     717081103     7,218    261,725 SH       SOLE                            257,775        3,950
----------------------------------------------------------------------------------------------------------------------------------
PITNEY BOWES INC          COMMON     724479100     3,693     84,800 SH       SOLE                             84,800            0
----------------------------------------------------------------------------------------------------------------------------------
PNC FINANCIAL SVCS GROUP 
INC                       COMMON     693475105     3,774     69,300 SH       SOLE                             69,300            0
----------------------------------------------------------------------------------------------------------------------------------
PPG INDUSTRIES INC        COMMON     693506107     3,584     57,100 SH       SOLE                             57,100            0
----------------------------------------------------------------------------------------------------------------------------------
PREMCOR INC               COMMON     74045Q104     2,530     47,500 SH       SOLE                             47,500            0
----------------------------------------------------------------------------------------------------------------------------------
PULTE HOMES INC           COMMON     745867101     1,848     28,100 SH       SOLE                             28,100            0
----------------------------------------------------------------------------------------------------------------------------------
QUIKSILVER INC            COMMON     74838C106    22,025  1,404,200 SH       SOLE                          1,404,200            0
----------------------------------------------------------------------------------------------------------------------------------
REGIONS FINL CORP         COMMON     7591EP100     3,693    109,000 SH       SOLE                            109,000            0
----------------------------------------------------------------------------------------------------------------------------------
RELIANT ENERGY INC        COMMON     75952B105    17,131  1,383,800 SH       SOLE                          1,383,800            0
----------------------------------------------------------------------------------------------------------------------------------





Page 6 of 7


                                                     FORM 13F INFORMATION TABLE

                                         Name of Reporting Manager: Hennessy Advisors, Inc.

                                                                                                    Column
      Column 1:         Column 2:    Column 3:   Column 4:    Column 5:              Column 6:         7:         Column 8:
----------------------------------------------------------------------------------------------------------------------------------
                          Title                   Market                                           
                           of         CUSIP       Value       Shares or                              Other
    Name of Issuer        Class       Number    (x$1,000)  Principal Amount  Investment Discretion   Mgrs.    Voting Authority
----------------------------------------------------------------------------------------------------------------------------------
                                                                   SH/ Put/        Shared   Shared     
                                                                   PRN Call  Sole  Defined   Other         Sole  Shared    None
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
RYDER SYSTEM INC          COMMON     783549108     1,443     38,800 SH       SOLE                             38,800            0
----------------------------------------------------------------------------------------------------------------------------------
SARA LEE CORP             COMMON     803111103     3,134    158,228 SH       SOLE                            157,000        1,228
----------------------------------------------------------------------------------------------------------------------------------
SBC COMMUNICATIONS INC    COMMON     78387G103    11,639    490,044 SH       SOLE                            479,900       10,144
----------------------------------------------------------------------------------------------------------------------------------
SEARS HOLDING CORP        COMMON     812350106    31,114    211,900 SH       SOLE                            211,900            0
----------------------------------------------------------------------------------------------------------------------------------
SIERRA HEALTH SERVICES    COMMON     826322109    24,496    342,800 SH       SOLE                            342,800            0
----------------------------------------------------------------------------------------------------------------------------------
SIERRA PACIFIC RESOURCES  COMMON     826428104     1,923    200,600 SH       SOLE                            200,600            0
----------------------------------------------------------------------------------------------------------------------------------
SPRINT FON GROUP          COMMON     852061100       157      6,257 SH       SOLE                                  0        6,257
----------------------------------------------------------------------------------------------------------------------------------
STEEL DYNAMICS INC        COMMON     858119100     1,530     49,800 SH       SOLE                             49,800            0
----------------------------------------------------------------------------------------------------------------------------------
SUNOCO INC                COMMON     86764P109     2,340     25,400 SH       SOLE                             25,400            0
----------------------------------------------------------------------------------------------------------------------------------
TELEFONOS DE MEX  
-SPON ADR                   ADR       879403780     4,180    221,300 SH       SOLE                            221,300            0
----------------------------------------------------------------------------------------------------------------------------------
TEREX CORP                COMMON     880779103     1,775     46,000 SH       SOLE                             46,000            0
----------------------------------------------------------------------------------------------------------------------------------
TERRA INDUSTRIES INC      COMMON     880915103    14,486  2,127,200 SH       SOLE                          2,127,200            0
----------------------------------------------------------------------------------------------------------------------------------
TESORO PETROLEUM CORP     COMMON     881609101    29,614    654,500 SH       SOLE                            654,500            0
----------------------------------------------------------------------------------------------------------------------------------
TEXAS INDUSTRIES INC      COMMON     882491103    17,026    302,800 SH       SOLE                            302,800            0
----------------------------------------------------------------------------------------------------------------------------------
TOLL BROTHERS INC         COMMON     889478103    27,957    275,300 SH       SOLE                            275,300            0
----------------------------------------------------------------------------------------------------------------------------------
TORO CO                   COMMON     891092108    17,930    464,400 SH       SOLE                            464,400            0
----------------------------------------------------------------------------------------------------------------------------------
TOTAL SA  -ADR             ADR       89151E109     4,160     35,600 SH       SOLE                             35,600            0
----------------------------------------------------------------------------------------------------------------------------------
U G I CORPORATION NEW     COMMON     902681105       469     16,800 SH       SOLE                                  0       16,800
----------------------------------------------------------------------------------------------------------------------------------
U S BANCORP               COMMON     902973304     3,772    129,175 SH       SOLE                            129,100           75
----------------------------------------------------------------------------------------------------------------------------------
USG CORP                  COMMON     903293405    19,937    469,100 SH       SOLE                            469,100            0
----------------------------------------------------------------------------------------------------------------------------------
VALERO ENERGY CORP        COMMON     91913Y100    35,995    463,200 SH       SOLE                            463,200            0
----------------------------------------------------------------------------------------------------------------------------------





Page 7 of 7


                                                     FORM 13F INFORMATION TABLE

                                         Name of Reporting Manager: Hennessy Advisors, Inc.

                                                                                                    Column
      Column 1:         Column 2:    Column 3:   Column 4:    Column 5:              Column 6:         7:         Column 8:
----------------------------------------------------------------------------------------------------------------------------------
                          Title                   Market                                           
                           of         CUSIP       Value       Shares or                              Other
    Name of Issuer        Class       Number    (x$1,000)  Principal Amount  Investment Discretion   Mgrs.    Voting Authority
----------------------------------------------------------------------------------------------------------------------------------
                                                                   SH/ Put/        Shared   Shared     
                                                                   PRN Call  Sole  Defined   Other         Sole  Shared    None
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
VERIZON COMMUNICATIONS    COMMON     92343V104     7,252    209,894 SH       SOLE                            194,950       14,944
----------------------------------------------------------------------------------------------------------------------------------
WACHOVIA CORP             COMMON     929903102     3,487     70,300 SH       SOLE                             70,300            0
----------------------------------------------------------------------------------------------------------------------------------
WASHINGTON MUTUAL INC     COMMON     939322103     3,790     93,150 SH       SOLE                             92,700          450
----------------------------------------------------------------------------------------------------------------------------------
WELLS FARGO & CO          COMMON     949746101     4,691     76,175 SH       SOLE                             60,900       15,275
----------------------------------------------------------------------------------------------------------------------------------
WESCO INTL INC            COMMON     95082P105    19,998    637,300 SH       SOLE                            637,300            0
----------------------------------------------------------------------------------------------------------------------------------
WESTAMERICA BANCORP       COMMON     957090103       497      9,407 SH       SOLE                                  0        9,407
----------------------------------------------------------------------------------------------------------------------------------
XL CAPITAL LTD             ADR       G98255105     3,594     48,300 SH       SOLE                             48,300            0
----------------------------------------------------------------------------------------------------------------------------------
YELLOW ROADWAY CORP       COMMON     985577105    17,226    339,100 SH       SOLE                            339,100            0
----------------------------------------------------------------------------------------------------------------------------------
                   TOTAL                       1,345,014
----------------------------------------------------------------------------------------------------------------------------------