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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:  December 31, 2008
                                                ------------------

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:  7250 Redwood Boulevard, Suite 200
          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                January 14, 2008
--------------------------------------------------------------------------------
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:                       183
                                                 ----------------------

Form 13F Information Table Value Total:                  $627,508
                                                 ----------------------
                                                       (thousands)



List of Other Included Managers:  NONE







Page 1 of 9                                                           12/31/2008


                                                     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
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
A T & T INC                 COM       00206R102    6,860     240,710  SH      SOLE                        240,710
------------------------------------------------------------------------------------------------------------------------------------
AECOM TECHNOLOGY CORP       COM       00766T100    1,119      36,400  SH      SOLE                         36,400
------------------------------------------------------------------------------------------------------------------------------------
AEROPOSTALE INC             COM       007865108    3,848     239,000  SH      SOLE                        239,000
------------------------------------------------------------------------------------------------------------------------------------
AETNA INC                   COM       00817Y108    4,637     162,700  SH      SOLE                        162,700
------------------------------------------------------------------------------------------------------------------------------------
AGCO CORP                   COM       001084102    3,510     148,800  SH      SOLE                        148,800
------------------------------------------------------------------------------------------------------------------------------------
AIRGAS INC                  COM       009363102      791      20,300  SH      SOLE                         20,300
------------------------------------------------------------------------------------------------------------------------------------
AK STEEL HOLDING CORP       COM       001547108      163      17,500  SH      SOLE                         17,500
------------------------------------------------------------------------------------------------------------------------------------
ALCOA INC                   COM       013817101    4,047     359,370  SH      SOLE                        359,370
------------------------------------------------------------------------------------------------------------------------------------
ALLIANCE IMAGING INC        COM       018606202    7,870     987,500  SH      SOLE                        987,500
------------------------------------------------------------------------------------------------------------------------------------
ALLIANZ SE  -ADR            ADR       018805101    1,995     184,200  SH      SOLE                        184,200
------------------------------------------------------------------------------------------------------------------------------------
ALLSTATE CORP               COM       020002101    1,949      59,500  SH      SOLE                         59,500
------------------------------------------------------------------------------------------------------------------------------------
ALPHA NATURAL RESOURCES INC COM       02076X102    5,367     331,500  SH      SOLE                        331,500
------------------------------------------------------------------------------------------------------------------------------------
ALTRIA GROUP INC            COM       02209S103    1,690     112,200  SH      SOLE                        112,200
------------------------------------------------------------------------------------------------------------------------------------
AMERICAN INTERNATIONAL
GROUP                       COM       026874107       47      30,110  SH      SOLE                         30,110
------------------------------------------------------------------------------------------------------------------------------------
AMERICA'S CAR-MART INC      COM       03062T105      913      66,100  SH      SOLE                         66,100
------------------------------------------------------------------------------------------------------------------------------------
AON CORP                    COM       037389103    9,666     211,600  SH      SOLE                        211,600
------------------------------------------------------------------------------------------------------------------------------------
ARCELORMITTAL -ADR          ADR       03938L104    2,164      88,000  SH      SOLE                         88,000
------------------------------------------------------------------------------------------------------------------------------------
ARCHER-DANIELS-MIDLAND CO   COM       039483102    6,227     216,000  SH      SOLE                        216,000
------------------------------------------------------------------------------------------------------------------------------------
ARVINMERITOR INC            COM       043353101    1,440     505,100  SH      SOLE                        505,100
------------------------------------------------------------------------------------------------------------------------------------
ASSURANT INC                COM       04621X108    4,335     144,500  SH      SOLE                        144,500
------------------------------------------------------------------------------------------------------------------------------------
AU OPTRONICS CORP  -ADR     ADR       002255107    2,111     274,900  SH      SOLE                        274,900
------------------------------------------------------------------------------------------------------------------------------------





Page 2 of 9                                                           12/31/2008


                                                     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
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
AUTOZONE INC                COM       053332102    8,452      60,600  SH      SOLE                         60,600
------------------------------------------------------------------------------------------------------------------------------------
AZZ INC                     COM       002474104    6,965     277,500  SH      SOLE                        277,500
------------------------------------------------------------------------------------------------------------------------------------
BANK of AMERICA CORP        COM       060505104    4,182     297,010  SH      SOLE                        297,010
------------------------------------------------------------------------------------------------------------------------------------
BASF AG  -ADR               ADR       055262505    5,102     129,800  SH      SOLE                        129,800
------------------------------------------------------------------------------------------------------------------------------------
BB&T CORP                   COM       054937107    1,513      55,100  SH      SOLE                         55,100
------------------------------------------------------------------------------------------------------------------------------------
BOOTS&COOTS/INTL WELL
CONTRL                      COM       099469504       21      18,180  SH      SOLE                         18,180
------------------------------------------------------------------------------------------------------------------------------------
BP PLC  -ADS                ADR       055622104    1,729      37,000  SH      SOLE                         37,000
------------------------------------------------------------------------------------------------------------------------------------
BRADY CORP                  COM       104674106    5,037     210,300  SH      SOLE                        210,300
------------------------------------------------------------------------------------------------------------------------------------
BRISTOL MYERS SQUIBB        COM       110122108    1,762      75,800  SH      SOLE                         75,800
------------------------------------------------------------------------------------------------------------------------------------
BRISTOW GROUP INC           COM       110394103    4,568     170,500  SH      SOLE                        170,500
------------------------------------------------------------------------------------------------------------------------------------
BUNGE LTD                   COM       G16962105    3,919      75,700  SH      SOLE                         75,700
------------------------------------------------------------------------------------------------------------------------------------
CAL-MAINE FOODS INC         COM       128030202    1,053      36,700  SH      SOLE                         36,700
------------------------------------------------------------------------------------------------------------------------------------
CATERPILLAR INC             COM       149123101      997      22,310  SH      SOLE                         22,310
------------------------------------------------------------------------------------------------------------------------------------
CBIZ INC                    COM       124805102    9,072   1,048,800  SH      SOLE                      1,048,800
------------------------------------------------------------------------------------------------------------------------------------
CBS CORP                    COM       124857202    1,782     217,600  SH      SOLE                        217,600
------------------------------------------------------------------------------------------------------------------------------------
CELANESE CORP               COM       150870103      329      26,500  SH      SOLE                         26,500
------------------------------------------------------------------------------------------------------------------------------------
CELESTICA INC               ADR       15101Q108      648     140,500  SH      SOLE                        140,500
------------------------------------------------------------------------------------------------------------------------------------
CHICAGO BRIDGE & IRON CO    ADR       167250109    1,808     179,900  SH      SOLE                        179,900
------------------------------------------------------------------------------------------------------------------------------------
CIGNA CORP                  COM       125509109    2,881     171,000  SH      SOLE                        171,000
------------------------------------------------------------------------------------------------------------------------------------
CITIGROUP INC               COM       172967101    1,721     256,555  SH      SOLE                        256,555
------------------------------------------------------------------------------------------------------------------------------------
CLEAN HARBORS INC           COM       184496107    1,059      16,700  SH      SOLE                         16,700
------------------------------------------------------------------------------------------------------------------------------------





Page 3 of 9                                                           12/31/2008


                                                     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
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
CNOOC LTD  -ADR             ADR       126132109    1,981      20,800  SH      SOLE                         20,800
------------------------------------------------------------------------------------------------------------------------------------
COCA-COLA FEMSA DE C V
-ADR                        ADR       191241108    8,811     202,500  SH      SOLE                        202,500
------------------------------------------------------------------------------------------------------------------------------------
CONSTELLATION ENERGY GRP
INC                         COM       210371100    2,283      91,000  SH      SOLE                         91,000
------------------------------------------------------------------------------------------------------------------------------------
CONTINUCARE CORP            COM       212172100       29      13,870  SH      SOLE                         13,870
------------------------------------------------------------------------------------------------------------------------------------
CORINTHIAN COLLEGES INC     COM       218868107    7,736     472,600  SH      SOLE                        472,600
------------------------------------------------------------------------------------------------------------------------------------
COSTCO WHOLESALE CORP       COM       22160K105    7,235     137,800  SH      SOLE                        137,800
------------------------------------------------------------------------------------------------------------------------------------
CREDIT SUISSE GROUP  -ADR   ADR       225401108    1,834      64,900  SH      SOLE                         64,900
------------------------------------------------------------------------------------------------------------------------------------
DAIMLER AG                  ADR       sedol -
                                      2307389 US   2,071      54,100  SH      SOLE                         54,100
------------------------------------------------------------------------------------------------------------------------------------
DEUTSCHE TELEKOM AG  -ADR   ADR       251566105    1,678     109,700  SH      SOLE                        109,700
------------------------------------------------------------------------------------------------------------------------------------
DONNELLEY (R R) & SONS CO   COM       257867101    1,818     133,900  SH      SOLE                        133,900
------------------------------------------------------------------------------------------------------------------------------------
DOW CHEMICAL                COM       260543103    1,277      84,600  SH      SOLE                         84,600
------------------------------------------------------------------------------------------------------------------------------------
DU PONT (E I) DE NEMOURS    COM       263534109    5,311     209,915  SH      SOLE                        209,915
------------------------------------------------------------------------------------------------------------------------------------
DYNCORP INTL INC            COM       26817C101    5,812     383,100  SH      SOLE                        383,100
------------------------------------------------------------------------------------------------------------------------------------
EMS TECHNOLOGIES INC        COM       26873N108    9,043     349,550  SH      SOLE                        349,550
------------------------------------------------------------------------------------------------------------------------------------
ENBRIDGE INC                ADR       29250N105    8,751     269,500  SH      SOLE                        269,500
------------------------------------------------------------------------------------------------------------------------------------
ENERSYS INC                 COM       29275Y102    4,201     381,900  SH      SOLE                        381,900
------------------------------------------------------------------------------------------------------------------------------------
ENGLOBAL CORP               COM       293306106      270      83,200  SH      SOLE                         83,200
------------------------------------------------------------------------------------------------------------------------------------
ENI SPA  -ADR               ADR       26874R108    1,865      39,000  SH      SOLE                         39,000
------------------------------------------------------------------------------------------------------------------------------------
ENTERPRISE PRODS PRTNER
-LP                         COM       293792107    1,681      81,100  SH      SOLE                         81,100
------------------------------------------------------------------------------------------------------------------------------------
EXIDE TECHNOLOGIES          COM       302051206      374      70,700  SH      SOLE                         70,700
------------------------------------------------------------------------------------------------------------------------------------
EXPRESS SCRIPTS INC         COM       302182100    7,213     131,200  SH      SOLE                        131,200
------------------------------------------------------------------------------------------------------------------------------------





Page 4 of 9                                                           12/31/2008


                                                     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
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
FAIRFAX FINANCIAL HOLDINGS  ADR       303901102   10,781      34,400  SH      SOLE                         34,400
------------------------------------------------------------------------------------------------------------------------------------
FLOWERS FOODS INC           COM       343498101    1,018      41,800  SH      SOLE                         41,800
------------------------------------------------------------------------------------------------------------------------------------
FLOWSERVE CORP              COM       34354P105    5,469     106,200  SH      SOLE                        106,200
------------------------------------------------------------------------------------------------------------------------------------
FLUOR CORP                  COM       343412102      570      12,700  SH      SOLE                         12,700
------------------------------------------------------------------------------------------------------------------------------------
FRESH DEL MONTE PRODUCE INC ADR       G36738105    6,217     277,300  SH      SOLE                        277,300
------------------------------------------------------------------------------------------------------------------------------------
GENERAL ELECTRIC CO         COM       369604103    5,081     313,640  SH      SOLE                        313,640
------------------------------------------------------------------------------------------------------------------------------------
GENERAL MOTORS CORP         COM       370442105      521     162,840  SH      SOLE                        162,840
------------------------------------------------------------------------------------------------------------------------------------
GENERAL STEEL HOLDINGS INC  ADR       370853103      297      75,500  SH      SOLE                         75,500
------------------------------------------------------------------------------------------------------------------------------------
GERDAU AMERISTEEL CORP      COM       37373P105      372      61,400  SH      SOLE                         61,400
------------------------------------------------------------------------------------------------------------------------------------
GREIF INC  -CL A            CLASS A   397624107    3,731     111,600  SH      SOLE                        111,600
------------------------------------------------------------------------------------------------------------------------------------
GULF ISLAND FABRICATION INC COM       402307102      349      24,200  SH      SOLE                         24,200
------------------------------------------------------------------------------------------------------------------------------------
HACKETT GROUP INC           COM       404609109      603     206,400  SH      SOLE                        206,400
------------------------------------------------------------------------------------------------------------------------------------
HANGER ORTHOPEDIC GRP       COM       41043F208    1,042      71,800  SH      SOLE                         71,800
------------------------------------------------------------------------------------------------------------------------------------
HANOVER INSURANCE GROUP INC COM       410867105    6,678     155,400  SH      SOLE                        155,400
------------------------------------------------------------------------------------------------------------------------------------
HARLEY-DAVIDSON INC         COM       412822108    1,644      96,900  SH      SOLE                         96,900
------------------------------------------------------------------------------------------------------------------------------------
HARTFORD FINANCIAL SERVICES COM       416515104    1,809     110,200  SH      SOLE                        110,200
------------------------------------------------------------------------------------------------------------------------------------
HASBRO INC                  COM       418056107    7,293     250,000  SH      SOLE                        250,000
------------------------------------------------------------------------------------------------------------------------------------
HAWAIIAN ELECTRIC INDS      COM       419870100    6,179     279,100  SH      SOLE                        279,100
------------------------------------------------------------------------------------------------------------------------------------
HESS CORP                   COM       42809H107      504       9,400  SH      SOLE                          9,400
------------------------------------------------------------------------------------------------------------------------------------
HOME DEPOT INC              COM       437076102    1,715      74,480  SH      SOLE                         74,480
------------------------------------------------------------------------------------------------------------------------------------
HSBC HOLDINGS PLC  -ADR     ADR       404280406    1,470      30,200  SH      SOLE                         30,200
------------------------------------------------------------------------------------------------------------------------------------





Page 5 of 9                                                           12/31/2008


                                                     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
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
HUB GROUP INC  -CL A        CLASS A   443320106    5,035     189,800  SH      SOLE                        189,800
------------------------------------------------------------------------------------------------------------------------------------
HUMANA INC                  COM       444859102    4,220     113,200  SH      SOLE                        113,200
------------------------------------------------------------------------------------------------------------------------------------
INNOPHOS HOLDINGS INC       COM       45774N108      735      37,100  SH      SOLE                         37,100
------------------------------------------------------------------------------------------------------------------------------------
INTEROIL CORP               ADR       460951106      554      40,300  SH      SOLE                         40,300
------------------------------------------------------------------------------------------------------------------------------------
INTL PAPER CO               COM       460146103    1,716     145,400  SH      SOLE                        145,400
------------------------------------------------------------------------------------------------------------------------------------
J.P. MORGAN CHASE & COMPANY COM       46625H100    3,148      99,835  SH      SOLE                         99,835
------------------------------------------------------------------------------------------------------------------------------------
JACOBS ENGINEERING GROUP
INC                         COM       469814107    5,113     106,300  SH      SOLE                        106,300
------------------------------------------------------------------------------------------------------------------------------------
KONINKLIJKE PHLPS ELC  -ADR ADR       500472303    1,981      99,700  SH      SOLE                         99,700
------------------------------------------------------------------------------------------------------------------------------------
KRAFT FOODS INC             COM       50075N104    1,110      41,350  SH      SOLE                         41,350
------------------------------------------------------------------------------------------------------------------------------------
L-3 COMMUNICATIONS HLDGS
INC                         COM       502424104    6,648      90,100  SH      SOLE                         90,100
------------------------------------------------------------------------------------------------------------------------------------
LACLEDE GROUP INC           COM       505597104    1,372      29,300  SH      SOLE                         29,300
------------------------------------------------------------------------------------------------------------------------------------
LAUDER (ESTEE) COS INC
-CL A                       CLASS A   518439104    4,814     155,500  SH      SOLE                        155,500
------------------------------------------------------------------------------------------------------------------------------------
LENNOX INTERNATIONAL INC    COM       526107107    6,716     208,000  SH      SOLE                        208,000
------------------------------------------------------------------------------------------------------------------------------------
LG PHILIPS LCD CO LTD -ADR  ADR       50186V102    3,217     388,500  SH      SOLE                        388,500
------------------------------------------------------------------------------------------------------------------------------------
LIFEPOINT HOSPITALS INC     COM       53219L109    5,438     238,100  SH      SOLE                        238,100
------------------------------------------------------------------------------------------------------------------------------------
LIMITED BRANDS INC          COM       532716107    1,729     172,200  SH      SOLE                        172,200
------------------------------------------------------------------------------------------------------------------------------------
LSB INDUSTRIES INC          COM       502160104    3,243     389,800  SH      SOLE                        389,800
------------------------------------------------------------------------------------------------------------------------------------
MACY'S INC                  COM       55616P104    1,933     186,800  SH      SOLE                        186,800
------------------------------------------------------------------------------------------------------------------------------------
MANTECH INTL CORP           COM       564563104    8,632     159,300  SH      SOLE                        159,300
------------------------------------------------------------------------------------------------------------------------------------
MASCO CORP                  COM       574599106    1,759     158,000  SH      SOLE                        158,000
------------------------------------------------------------------------------------------------------------------------------------
MASSEY ENERGY CO            COM       576206106    4,013     291,000  SH      SOLE                        291,000
------------------------------------------------------------------------------------------------------------------------------------





Page 6 of 9                                                           12/31/2008


                                                     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
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
MCKESSON CORP               COM       58155Q103    5,535     142,900  SH      SOLE                        142,900
------------------------------------------------------------------------------------------------------------------------------------
MDU RESOURCES GROUP INC     COM       552690109      734      34,000  SH      SOLE                         34,000
------------------------------------------------------------------------------------------------------------------------------------
MEDCO HEALTH SOLUTIONS INC  COM       58405U102    7,674     183,100  SH      SOLE                        183,100
------------------------------------------------------------------------------------------------------------------------------------
MERCK & CO                  COM       589331107    6,197     203,850  SH      SOLE                        203,850
------------------------------------------------------------------------------------------------------------------------------------
METALICO INC                COM       591176102      105      67,600  SH      SOLE                         67,600
------------------------------------------------------------------------------------------------------------------------------------
MOBILE TELESYSTEMS OJS
-ADR                        ADR       607409109    1,587      59,500  SH      SOLE                         59,500
------------------------------------------------------------------------------------------------------------------------------------
MOLINA HEALTHCARE INC       COM       60855R100    4,341     246,500  SH      SOLE                        246,500
------------------------------------------------------------------------------------------------------------------------------------
MORGAN STANLEY              COM       617446448    1,641     102,300  SH      SOLE                        102,300
------------------------------------------------------------------------------------------------------------------------------------
MULTI-FINELINE ELECTRON INC COM       62541B101      500      42,800  SH      SOLE                         42,800
------------------------------------------------------------------------------------------------------------------------------------
MURPHY OIL CORP             COM       626717102      537      12,100  SH      SOLE                         12,100
------------------------------------------------------------------------------------------------------------------------------------
MWI VETERINARY SUPPLY       COM       55402X105    6,330     234,800  SH      SOLE                        234,800
------------------------------------------------------------------------------------------------------------------------------------
NCI INC                     COM       62886K104    1,561      51,800  SH      SOLE                         51,800
------------------------------------------------------------------------------------------------------------------------------------
NEWELL RUBBERMAID INC       COM       651229106    1,207     123,400  SH      SOLE                        123,400
------------------------------------------------------------------------------------------------------------------------------------
NORTHWEST NATURAL GAS CO    COM       667655104    8,510     192,400  SH      SOLE                        192,400
------------------------------------------------------------------------------------------------------------------------------------
ODYSSEY RE HOLDINGS CORP    COM       67612W108   10,217     197,200  SH      SOLE                        197,200
------------------------------------------------------------------------------------------------------------------------------------
OIL STATES INTL INC         COM       678026105      350      18,700  SH      SOLE                         18,700
------------------------------------------------------------------------------------------------------------------------------------
OLYMPIC STEEL INC           COM       68162K106      318      15,600  SH      SOLE                         15,600
------------------------------------------------------------------------------------------------------------------------------------
OPENTV CORP                 COM       G67543101       31      24,870  SH      SOLE                         24,870
------------------------------------------------------------------------------------------------------------------------------------
OTTER TAIL CORP             COM       689648103      712      30,500  SH      SOLE                         30,500
------------------------------------------------------------------------------------------------------------------------------------
OVERSTOCK.COM INC           COM       690370101      493      45,700  SH      SOLE                         45,700
------------------------------------------------------------------------------------------------------------------------------------
OWENS & MINOR INC           COM       690732102    6,201     164,700  SH      SOLE                        164,700
------------------------------------------------------------------------------------------------------------------------------------





Page 7 of 9                                                           12/31/2008


                                                     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
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
OWENS-ILLINOIS INC          COM       690768403    5,745     210,200  SH      SOLE                        210,200
------------------------------------------------------------------------------------------------------------------------------------
PANERA BREAD CO             COM       69840W108    7,314     140,000  SH      SOLE                        140,000
------------------------------------------------------------------------------------------------------------------------------------
PENTAIR INC                 COM       709631105    4,753     200,800  SH      SOLE                        200,800
------------------------------------------------------------------------------------------------------------------------------------
PEPSI BOTTLING GROUP INC    COM       713409100    5,207     231,300  SH      SOLE                        231,300
------------------------------------------------------------------------------------------------------------------------------------
PEPSIAMERICAS INC           COM       71343P200    5,894     289,500  SH      SOLE                        289,500
------------------------------------------------------------------------------------------------------------------------------------
PFIZER INC                  COM       717081103    7,100     400,930  SH      SOLE                        400,930
------------------------------------------------------------------------------------------------------------------------------------
PHI INC                     COM       69336T205      413      29,500  SH      SOLE                         29,500
------------------------------------------------------------------------------------------------------------------------------------
PHILIP MORRIS INTERNATIONAL COM       718172109      218       5,000  SH      SOLE                          5,000
------------------------------------------------------------------------------------------------------------------------------------
PIEDMONT NATURAL GAS CO     COM       720186105    7,550     238,400  SH      SOLE                        238,400
------------------------------------------------------------------------------------------------------------------------------------
PITNEY BOWES INC            COM       724479100    1,743      68,400  SH      SOLE                         68,400
------------------------------------------------------------------------------------------------------------------------------------
PRICESMART INC              COM       741511109    6,483     313,800  SH      SOLE                        313,800
------------------------------------------------------------------------------------------------------------------------------------
RALCORP HOLDINGS INC        COM       751028101    6,891     118,000  SH      SOLE                        118,000
------------------------------------------------------------------------------------------------------------------------------------
RAYMOND JAMES FINANCIAL
CORP                        COM       754730109    3,549     207,200  SH      SOLE                        207,200
------------------------------------------------------------------------------------------------------------------------------------
REHABCARE GROUP INC         COM       759148109    6,011     396,500  SH      SOLE                        396,500
------------------------------------------------------------------------------------------------------------------------------------
RELIANCE STEEL & ALUMINUM
CO                          COM       759509102      307      15,400  SH      SOLE                         15,400
------------------------------------------------------------------------------------------------------------------------------------
RENT-A-CENTER INC           COM       76009N100    5,812     329,300  SH      SOLE                        329,300
------------------------------------------------------------------------------------------------------------------------------------
REYNOLDS AMERICAN INC       COM       761713106    1,560      38,700  SH      SOLE                         38,700
------------------------------------------------------------------------------------------------------------------------------------
RIO TINTO GROUP (GBR) -ADR  ADR       767204100    2,205      24,800  SH      SOLE                         24,800
------------------------------------------------------------------------------------------------------------------------------------
ROSS STORES INC             COM       778296103    6,294     211,700  SH      SOLE                        211,700
------------------------------------------------------------------------------------------------------------------------------------
RWE AG VORMA  -ADR          ADR       74975E303    6,007      65,900  SH      SOLE                         65,900
------------------------------------------------------------------------------------------------------------------------------------





Page 8 of 9                                                           12/31/2008


                                                     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            COM       783549108      667      17,200  SH      SOLE                         17,200
------------------------------------------------------------------------------------------------------------------------------------
SALLY BEAUTY HOLDINGS INC   COM       79546E104    4,518     794,100  SH      SOLE                        794,100
------------------------------------------------------------------------------------------------------------------------------------
SASOL LTD  -ADR             ADR       803866300    1,978      65,200  SH      SOLE                         65,200
------------------------------------------------------------------------------------------------------------------------------------
SCHNITZER STEEL INDS  -CL A CLASS A   806882106      388      10,300  SH      SOLE                         10,300
------------------------------------------------------------------------------------------------------------------------------------
SIEMENS AG  -ADR            ADR       826197501    5,068      66,900  SH      SOLE                         66,900
------------------------------------------------------------------------------------------------------------------------------------
SMITH (A O) CORP            COM       831865209    5,246     177,700  SH      SOLE                        177,700
------------------------------------------------------------------------------------------------------------------------------------
SNAP-ON INC                 COM       833034101    5,340     135,600  SH      SOLE                        135,600
------------------------------------------------------------------------------------------------------------------------------------
SONY CORP  -ADR             ADR       835699307    3,731     170,600  SH      SOLE                        170,600
------------------------------------------------------------------------------------------------------------------------------------
SOUTHERN COPPER CORP        COM       84265V105    2,105     131,100  SH      SOLE                        131,100
------------------------------------------------------------------------------------------------------------------------------------
SPX CORP                    COM       784635104      365       9,000  SH      SOLE                          9,000
------------------------------------------------------------------------------------------------------------------------------------
STANLEY INC                 COM       854532108   11,782     325,300  SH      SOLE                        325,300
------------------------------------------------------------------------------------------------------------------------------------
STARWOOD HOTELS&RESORTS
WRLD                        COM       85590A401    1,794     100,200  SH      SOLE                        100,200
------------------------------------------------------------------------------------------------------------------------------------
STATOILHYDRO ASA  -ADR      ADR       85771P102      528      31,700  SH      SOLE                         31,700
------------------------------------------------------------------------------------------------------------------------------------
STEEL DYNAMICS INC          COM       858119100    4,304     385,000  SH      SOLE                        385,000
------------------------------------------------------------------------------------------------------------------------------------
STEPAN CO                   COM       858586100    1,222      26,000  SH      SOLE                         26,000
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STIFEL FINANCIAL CORP       COM       860630102    7,125     155,400  SH      SOLE                        155,400
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STONERIDGE INC              COM       86183P102      316      69,400  SH      SOLE                         69,400
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SUN HEALTHCARE GROUP INC    COM       866933401    4,596     519,300  SH      SOLE                        519,300
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SUN LIFE FINANCIAL INC      ADR       866796105    1,803      77,900  SH      SOLE                         77,900
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SUPERVALU INC               COM       868536103    2,078     142,300  SH      SOLE                        142,300
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Page 9 of 9                                                           12/31/2008


                                                     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:
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                            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
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
TAIWAN SEMICONDUCTOR  -ADR  ADR       874039100    1,890     239,300  SH      SOLE                        239,300
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TECO ENERGY INC             COM       872375100      680      55,100  SH      SOLE                         55,100
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TELE NORTE LESTE  -ADR      ADR       879246106    5,323     382,400  SH      SOLE                        382,400
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TELEDYNE TECHNOLOGIES INC   COM       879360105   14,140     317,400  SH      SOLE                        317,400
------------------------------------------------------------------------------------------------------------------------------------
TENET HEALTHCARE CORP       COM       88033G100    1,456   1,266,000  SH      SOLE                      1,266,000
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TETRA TECH INC              COM       88162G103    6,755     279,700  SH      SOLE                        279,700
------------------------------------------------------------------------------------------------------------------------------------
TEXTRON INC                 COM       883203101    1,580     113,900  SH      SOLE                        113,900
------------------------------------------------------------------------------------------------------------------------------------
TOTAL SA  -ADR              ADR       89151E109    8,090     146,300  SH      SOLE                        146,300
------------------------------------------------------------------------------------------------------------------------------------
U S BANCORP                 COM       902973304    1,391      55,600  SH      SOLE                         55,600
------------------------------------------------------------------------------------------------------------------------------------
UTSTARCOM INC               COM       918076100      401     216,600  SH      SOLE                        216,600
------------------------------------------------------------------------------------------------------------------------------------
VECTREN CORP                COM       92240G101      950      38,000  SH      SOLE                         38,000
------------------------------------------------------------------------------------------------------------------------------------
VERIZON COMMUNICATIONS      COM       92343V104    7,554     222,830  SH      SOLE                        222,830
------------------------------------------------------------------------------------------------------------------------------------
VIMPEL COMMUN OJS   -ADR    ADR       68370R109    1,371     191,500  SH      SOLE                        191,500
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WESTERN DIGITAL CORP        COM       958102105      393      34,300  SH      SOLE                         34,300
------------------------------------------------------------------------------------------------------------------------------------
WET SEAL INC  -CL A         CLASS A   961840105       32      10,940  SH      SOLE                         10,940
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WEYERHAEUSER CO             COM       962166104    1,390      45,400  SH      SOLE                         45,400
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WILLBROS GROUP INC          ADR       969199108      229      27,000  SH      SOLE                         27,000
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                    TOTAL                        627,508
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