---------------------------------------
                                         OMB Number:                   3235-0006
                                         Expires:              January 31, 2007
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                                           hours per response ............. 23.5
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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, 2006
                                                ------------------

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 31, 2007
--------------------------------------------------------------------------------
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:                       179
                                                 ----------------------

Form 13F Information Table Value Total:                $1,997,283
                                                 ----------------------
                                                       (thousands)



List of Other Included Managers:  NONE







Page 1 of 9                                                           12/31/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
------------------------------------------------------------------------------------------------------------------------------------
AAR CORP                  COMMON     000361105      26,157   896,100 SH      SOLE                            896,100               0
------------------------------------------------------------------------------------------------------------------------------------
AEP INDUSTRIES INC        COMMON     001031103       5,891   110,500 SH      SOLE                            110,500               0
------------------------------------------------------------------------------------------------------------------------------------
AES CORP. (THE)           COMMON     00130H105       4,670   211,900 SH      SOLE                            211,900               0
------------------------------------------------------------------------------------------------------------------------------------
AMN HEALTHCARE SERVICES
INC                       COMMON     001744101       5,169   187,700 SH      SOLE                            187,700               0
------------------------------------------------------------------------------------------------------------------------------------
AMR CORP/DE               COMMON     001765106       5,127   170,600 SH      SOLE                            169,600           1,000
------------------------------------------------------------------------------------------------------------------------------------
A T & T INC               COMMON     00206R102      15,380   430,221 SH      SOLE                            422,725           7,496
------------------------------------------------------------------------------------------------------------------------------------
ACUITY BRANDS INC         COMMON     00508Y102       7,202   138,400 SH      SOLE                            138,400               0
------------------------------------------------------------------------------------------------------------------------------------
ALBEMARLE CORP            COMMON     012653101       8,465   117,900 SH      SOLE                            117,900               0
------------------------------------------------------------------------------------------------------------------------------------
ALLEGHENY TECHNOLOGIES
INC                       COMMON     01741R102      51,098   563,500 SH      SOLE                            563,500               0
------------------------------------------------------------------------------------------------------------------------------------
ALON USA ENERGY INC       COMMON     020520102       3,257   123,800 SH      SOLE                            123,800               0
------------------------------------------------------------------------------------------------------------------------------------
ALTRIA GROUP INC          COMMON     02209S103      14,239   165,920 SH      SOLE                            165,475             445
------------------------------------------------------------------------------------------------------------------------------------
AMERCO                    COMMON     023586100      28,278   325,000 SH      SOLE                            325,000               0
------------------------------------------------------------------------------------------------------------------------------------
AMPCO-PITTSBURGH CORP     COMMON     032037103       4,808   143,600 SH      SOLE                            143,600               0
------------------------------------------------------------------------------------------------------------------------------------
ANIXTER INTL INC          COMMON     035290105       6,283   115,700 SH      SOLE                            115,700               0
------------------------------------------------------------------------------------------------------------------------------------
ANNTAYLOR STORES CORP     COMMON     036115103       8,266   251,700 SH      SOLE                            251,700               0
------------------------------------------------------------------------------------------------------------------------------------
ARCH CHEMICALS INC        COMMON     03937R102       4,007   120,300 SH      SOLE                            120,300               0
------------------------------------------------------------------------------------------------------------------------------------
ARCHER-DANIELS-MIDLAND CO COMMON     039483102       3,215   100,600 SH      SOLE                            100,600               0
------------------------------------------------------------------------------------------------------------------------------------
ARKANSAS BEST CORP        COMMON     040790107       3,182    88,400 SH      SOLE                             88,400               0
------------------------------------------------------------------------------------------------------------------------------------
ASSURANT INC              COMMON     04621X108       6,536   118,300 SH      SOLE                            118,300               0
------------------------------------------------------------------------------------------------------------------------------------
ASTEC INDUSTRIES INC      COMMON     046224101      23,524   670,200 SH      SOLE                            670,200               0
------------------------------------------------------------------------------------------------------------------------------------
BB&T CORP                 COMMON     054937107       4,819   109,700 SH      SOLE                            109,700               0
------------------------------------------------------------------------------------------------------------------------------------




Page 2 of 9                                                           12/31/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
BP PLC  -ADS               ADR       055622104       4,697    70,000 SH      SOLE                             69,700             300
------------------------------------------------------------------------------------------------------------------------------------
BANCO BRADESCO SA  -ADR    ADR       059460303      27,696   686,400 SH      SOLE                            686,400               0
------------------------------------------------------------------------------------------------------------------------------------
BANCO ITAU HLDG FINCIERA
-ADR                       ADR       059602201      30,008   830,100 SH      SOLE                            830,100               0
------------------------------------------------------------------------------------------------------------------------------------
BANK OF AMERICA CORP      COMMON     060505104       5,445   101,994 SH      SOLE                             90,600          11,394
------------------------------------------------------------------------------------------------------------------------------------
BARCLAYS PLC/ENGLAND
-ADR                       ADR       06738E204       5,151    88,600 SH      SOLE                             88,600               0
------------------------------------------------------------------------------------------------------------------------------------
BEACON ROOFING SUPPLY INC COMMON     073685109      20,629 1,096,100 SH      SOLE                          1,096,100               0
------------------------------------------------------------------------------------------------------------------------------------
BELDEN CDT INC            COMMON     077454106      12,137   310,500 SH      SOLE                            310,500               0
------------------------------------------------------------------------------------------------------------------------------------
BENCHMARK ELECTRONICS INC COMMON     08160H101       5,627   231,000 SH      SOLE                            231,000               0
------------------------------------------------------------------------------------------------------------------------------------
BERKLEY (W R) CORP        COMMON     084423102      23,060   668,200 SH      SOLE                            668,200               0
------------------------------------------------------------------------------------------------------------------------------------
BIG LOTS INC              COMMON     089302103       7,135   311,300 SH      SOLE                            311,300               0
------------------------------------------------------------------------------------------------------------------------------------
BRIGHTPOINT INC           COMMON     109473405      18,354 1,364,600 SH      SOLE                          1,364,600               0
------------------------------------------------------------------------------------------------------------------------------------
BRISTOL MYERS SQUIBB      COMMON     110122108       4,998   189,900 SH      SOLE                            189,100             800
------------------------------------------------------------------------------------------------------------------------------------
CARMAX INC                COMMON     143130102       8,200   152,900 SH      SOLE                            152,900               0
------------------------------------------------------------------------------------------------------------------------------------
CASUAL MALE RETAIL GRP
INC                       COMMON     148711104       5,263   403,300 SH      SOLE                            403,300               0
------------------------------------------------------------------------------------------------------------------------------------
CELADON GROUP INC         COMMON     150838100       3,710   221,500 SH      SOLE                            221,500               0
------------------------------------------------------------------------------------------------------------------------------------
CENVEO INC                COMMON     15670S105       4,950   233,500 SH      SOLE                            233,500               0
------------------------------------------------------------------------------------------------------------------------------------
CHAPARRAL STEEL CO        COMMON     159423102       5,587   126,200 SH      SOLE                            126,200               0
------------------------------------------------------------------------------------------------------------------------------------
CHEVRONTEXACO CORP        COMMON     166764100       1,144    15,557 SH      SOLE                                  0          15,557
------------------------------------------------------------------------------------------------------------------------------------
CHILDRENS PLACE RETAIL
STRS                      COMMON     168905107       6,168    97,100 SH      SOLE                             97,100               0
------------------------------------------------------------------------------------------------------------------------------------
CHUNGHWA TELECOM CO  -ADR  ADR       17133Q205       4,800   243,300 SH      SOLE                            243,300               0
------------------------------------------------------------------------------------------------------------------------------------
CINCINNATI FINANCIAL CORP COMMON     172062101       4,776   105,400 SH      SOLE                            105,400               0
------------------------------------------------------------------------------------------------------------------------------------




Page 3 of 9                                                           12/31/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
CIRCUIT CITY STORES INC   COMMON     172737108      17,811   938,400 SH      SOLE                            938,400               0
------------------------------------------------------------------------------------------------------------------------------------
CITIGROUP INC             COMMON     172967101      14,918   267,825 SH      SOLE                            267,825               0
------------------------------------------------------------------------------------------------------------------------------------
CLEAN HARBORS INC         COMMON     184496107       5,504   113,700 SH      SOLE                            113,700               0
------------------------------------------------------------------------------------------------------------------------------------
COCA-COLA COMPANY         COMMON     191216100       1,637    33,925 SH      SOLE                             33,925               0
------------------------------------------------------------------------------------------------------------------------------------
COMMSCOPE INC             COMMON     203372107       6,072   199,200 SH      SOLE                            199,200               0
------------------------------------------------------------------------------------------------------------------------------------
CONN'S INC                COMMON     208242107      12,982   557,900 SH      SOLE                            557,900               0
------------------------------------------------------------------------------------------------------------------------------------
CONTINENTAL AIRLS INC
-CL B                     CLASS B    210795308       5,948   144,200 SH      SOLE                            144,200               0
------------------------------------------------------------------------------------------------------------------------------------
CRAY INC                  COMMON     225223304       4,449   374,500 SH      SOLE                            374,500               0
------------------------------------------------------------------------------------------------------------------------------------
CROSSTEX ENERGY INC       COMMON     22765Y104       4,342   137,000 SH      SOLE                            137,000               0
------------------------------------------------------------------------------------------------------------------------------------
CUMMINS INC               COMMON     231021106      10,589    89,600 SH      SOLE                             89,600               0
------------------------------------------------------------------------------------------------------------------------------------
DAIMLERCHRYSLER AG         ADR                       4,962    80,800 SH      SOLE                             80,800               0
------------------------------------------------------------------------------------------------------------------------------------
DSW INC                   COMMON     23334L102       4,906   127,200 SH      SOLE                            127,200               0
------------------------------------------------------------------------------------------------------------------------------------
DIAGEO PLC  -ADR           ADR       25243Q205       4,893    61,700 SH      SOLE                             61,700               0
------------------------------------------------------------------------------------------------------------------------------------
DICKS SPORTING GOODS INC  COMMON     253393102       6,712   137,000 SH      SOLE                            137,000               0
------------------------------------------------------------------------------------------------------------------------------------
DILLARDS INC  -CL A       CLASS A    254067101      11,760   336,300 SH      SOLE                            336,300               0
------------------------------------------------------------------------------------------------------------------------------------
DOLLAR TREE STORES INC    COMMON     256747106       6,023   200,100 SH      SOLE                            200,100               0
------------------------------------------------------------------------------------------------------------------------------------
DONNELLEY (R R) & SONS CO COMMON     257867101       4,787   134,700 SH      SOLE                            134,700               0
------------------------------------------------------------------------------------------------------------------------------------
DOW CHEMICAL              COMMON     260543103       4,789   119,900 SH      SOLE                            119,900               0
------------------------------------------------------------------------------------------------------------------------------------
DRESS BARN INC            COMMON     261570105      27,130 1,162,900 SH      SOLE                          1,162,900               0
------------------------------------------------------------------------------------------------------------------------------------
DREW INDUSTRIES INC       COMMON     26168L205      19,645   755,300 SH      SOLE                            755,300               0
------------------------------------------------------------------------------------------------------------------------------------
DU PONT (E I) DE NEMOURS  COMMON     263534109      14,642   300,600 SH      SOLE                            300,600               0
------------------------------------------------------------------------------------------------------------------------------------




Page 4 of 9                                                           12/31/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
EMC INSURANCE GROUP INC   COMMON     268664109       4,596   134,700 SH      SOLE                            134,700               0
------------------------------------------------------------------------------------------------------------------------------------
ENI SPA  -ADR              ADR       26874R108       4,864    72,300 SH      SOLE                             72,300               0
------------------------------------------------------------------------------------------------------------------------------------
EMCOR GROUP INC           COMMON     29084Q100      40,597   714,100 SH      SOLE                            714,100               0
------------------------------------------------------------------------------------------------------------------------------------
ENERGIZER HOLDINGS INC    COMMON     29266R108       6,425    90,500 SH      SOLE                             90,500               0
------------------------------------------------------------------------------------------------------------------------------------
ENTERPRISE PRODS PRTNER
-LP                       COMMON     293792107       4,819   166,300 SH      SOLE                            166,300               0
------------------------------------------------------------------------------------------------------------------------------------
ESCALA GROUP INC          COMMON     29605W107       7,940 1,032,500 SH      SOLE                          1,032,500               0
------------------------------------------------------------------------------------------------------------------------------------
EXPRESS SCRIPTS INC       COMMON     302182100      18,408   257,100 SH      SOLE                            257,100               0
------------------------------------------------------------------------------------------------------------------------------------
EXXON MOBIL CORPORATION   COMMON     30231G102         400     5,220 SH      SOLE                                  0           5,220
------------------------------------------------------------------------------------------------------------------------------------
FMC TECHNOLOGIES INC      COMMON     30249U101       3,840    62,300 SH      SOLE                             62,300               0
------------------------------------------------------------------------------------------------------------------------------------
FIDELITY NATIONAL
FINANCIAL                 COMMON     31620R105       4,931   206,500 SH      SOLE                            206,500               0
------------------------------------------------------------------------------------------------------------------------------------
FOSTER WHEELER LTD        COMMON                    29,825   540,900 SH      SOLE                            540,900               0
------------------------------------------------------------------------------------------------------------------------------------
FRONTIER OIL CORP         COMMON     35914P105      34,643 1,205,400 SH      SOLE                          1,205,400               0
------------------------------------------------------------------------------------------------------------------------------------
GENERAL CABLE CORP/DE     COMMON     369300108      45,253 1,035,300 SH      SOLE                          1,035,300               0
------------------------------------------------------------------------------------------------------------------------------------
GENERAL ELECTRIC CO.      COMMON     369604103       7,676   206,276 SH      SOLE                            205,050           1,226
------------------------------------------------------------------------------------------------------------------------------------
GENERAL MOTORS CORP       COMMON     370442105      14,212   462,617 SH      SOLE                            462,250             367
------------------------------------------------------------------------------------------------------------------------------------
GENTEK INC                COMMON     37245X203       5,144   148,700 SH      SOLE                            148,700               0
------------------------------------------------------------------------------------------------------------------------------------
GERBER SCIENTIFIC INC     COMMON     373730100       3,846   306,200 SH      SOLE                            306,200               0
------------------------------------------------------------------------------------------------------------------------------------
GIANT INDUSTRIES INC      COMMON     374508109      29,665   395,800 SH      SOLE                            395,800               0
------------------------------------------------------------------------------------------------------------------------------------
GLAXOSMITHKLINE PLC  -ADR  ADR       37733W105       4,780    90,600 SH      SOLE                             90,600               0
------------------------------------------------------------------------------------------------------------------------------------
GRANITE CONSTRUCTION INC  COMMON     387328107       5,827   115,800 SH      SOLE                            115,800               0
------------------------------------------------------------------------------------------------------------------------------------
GREAT ATLANTIC & PAC TEA
CO                        COMMON     390064103      24,234   941,500 SH      SOLE                            941,500               0
------------------------------------------------------------------------------------------------------------------------------------




Page 5 of 9                                                           12/31/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
GYMBOREE CORP             COMMON     403777105       4,919   128,900 SH      SOLE                            128,900               0
------------------------------------------------------------------------------------------------------------------------------------
HSBC HOLDINGS PLC  -ADR    ADR       404280406       4,793    52,300 SH      SOLE                             52,300               0
------------------------------------------------------------------------------------------------------------------------------------
HARLEYSVILLE GROUP INC    COMMON     412824104       4,506   129,400 SH      SOLE                            129,400               0
------------------------------------------------------------------------------------------------------------------------------------
HEINZ (H J) CO            COMMON     423074103       4,776   106,100 SH      SOLE                            106,100               0
------------------------------------------------------------------------------------------------------------------------------------
HENNESSY ADVISORS INC     COMMON     425885100      43,234 1,879,721 SH      SOLE                                  0       1,879,721
------------------------------------------------------------------------------------------------------------------------------------
HOLLY CORP                COMMON     435758305      40,699   791,800 SH      SOLE                            791,800               0
------------------------------------------------------------------------------------------------------------------------------------
IDEARC INC                COMMON     451663108         321    11,198 SH      SOLE                             10,534             664
------------------------------------------------------------------------------------------------------------------------------------
INTL PAPER CO             COMMON     460146103       4,869   143,100 SH      SOLE                            142,800             300
------------------------------------------------------------------------------------------------------------------------------------
INTERSTATE HOTELS &
RESORTS                   COMMON     46088S106       3,387   453,960 SH      SOLE                            453,900              60
------------------------------------------------------------------------------------------------------------------------------------
IPSCO INC                  ADR       462622101      25,336   269,900 SH      SOLE                            269,900               0
------------------------------------------------------------------------------------------------------------------------------------
J P MORGAN CHASE & CO     COMMON     46625H100      14,061   291,115 SH      SOLE                            290,825             290
------------------------------------------------------------------------------------------------------------------------------------
JABIL CIRCUIT INC         COMMON     466313103      14,669   597,500 SH      SOLE                            597,500               0
------------------------------------------------------------------------------------------------------------------------------------
JACK IN THE BOX INC       COMMON     466367109       7,306   119,700 SH      SOLE                            119,700               0
------------------------------------------------------------------------------------------------------------------------------------
KIMBERLY-CLARK CORP       COMMON     494368103       4,867    71,626 SH      SOLE                             70,500           1,126
------------------------------------------------------------------------------------------------------------------------------------
KRAFT FOODS INC           COMMON     50075N104       4,844   135,700 SH      SOLE                            135,700               0
------------------------------------------------------------------------------------------------------------------------------------
LILLY (ELI) & CO          COMMON     532457108       4,554    87,400 SH      SOLE                             87,400               0
------------------------------------------------------------------------------------------------------------------------------------
LINCOLN ELECTRIC HLDGS
INC                       COMMON     533900106       4,290    71,000 SH      SOLE                             71,000               0
------------------------------------------------------------------------------------------------------------------------------------
LYONDELL CHEMICAL CO      COMMON     552078107       4,851   189,700 SH      SOLE                            189,700               0
------------------------------------------------------------------------------------------------------------------------------------
MANITOWOC CO              COMMON     563571108      44,876   755,100 SH      SOLE                            755,100               0
------------------------------------------------------------------------------------------------------------------------------------
MARATHON OIL CORP         COMMON     565849106      33,809   365,500 SH      SOLE                            365,500               0
------------------------------------------------------------------------------------------------------------------------------------
MASCO CORP                COMMON     574599106       4,920   164,700 SH      SOLE                            164,700               0
------------------------------------------------------------------------------------------------------------------------------------




Page 6 of 9                                                           12/31/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
MATRIX SERVICE COMPANY    COMMON     576853105       5,889   365,800 SH      SOLE                            365,800               0
------------------------------------------------------------------------------------------------------------------------------------
MATTEL INC                COMMON     577081102       4,874   215,100 SH      SOLE                            215,100               0
------------------------------------------------------------------------------------------------------------------------------------
MEADOWBROOK INS GROUP INC COMMON     58319P108       3,989   403,300 SH      SOLE                            403,300               0
------------------------------------------------------------------------------------------------------------------------------------
MEADWESTVACO CORP         COMMON     583334107       4,816   160,200 SH      SOLE                            160,200               0
------------------------------------------------------------------------------------------------------------------------------------
MENS WEARHOUSE INC        COMMON     587118100       6,386   166,900 SH      SOLE                            166,900               0
------------------------------------------------------------------------------------------------------------------------------------
MENTOR GRAPHICS CORP      COMMON     587200106       5,957   330,400 SH      SOLE                            330,400               0
------------------------------------------------------------------------------------------------------------------------------------
MERCK & CO                COMMON     589331107      14,096   323,295 SH      SOLE                            322,800             495
------------------------------------------------------------------------------------------------------------------------------------
NATCO GROUP INC           COMMON     63227W203       3,752   117,700 SH      SOLE                            117,700               0
------------------------------------------------------------------------------------------------------------------------------------
NATIONAL BEVERAGE CORP    COMMON     635017106       3,639   259,400 SH      SOLE                            259,400               0
------------------------------------------------------------------------------------------------------------------------------------
NATIONAL CITY CORP        COMMON     635405103       4,870   133,200 SH      SOLE                            133,200               0
------------------------------------------------------------------------------------------------------------------------------------
NEWELL RUBBERMAID INC     COMMON     651229106       4,725   163,200 SH      SOLE                            163,200               0
------------------------------------------------------------------------------------------------------------------------------------
NORDSTROM INC             COMMON     655664100      27,956   566,600 SH      SOLE                            566,600               0
------------------------------------------------------------------------------------------------------------------------------------
OGE ENERGY CORP           COMMON     670837103      11,637   290,920 SH      SOLE                            290,300             620
------------------------------------------------------------------------------------------------------------------------------------
OIL STATES INTL INC       COMMON     678026105      19,212   596,100 SH      SOLE                            596,100               0
------------------------------------------------------------------------------------------------------------------------------------
OLD DOMINION FREIGHT      COMMON     679580100       2,903   120,600 SH      SOLE                            120,600               0
------------------------------------------------------------------------------------------------------------------------------------
ON SEMICONDUCTOR CORP     COMMON     682189105      24,708 3,264,000 SH      SOLE                          3,264,000               0
------------------------------------------------------------------------------------------------------------------------------------
P.A.M. TRANSPORTATION
SVCS                      COMMON     693149106       3,015   136,900 SH      SOLE                            136,900               0
------------------------------------------------------------------------------------------------------------------------------------
P G & E CORP              COMMON     69331C108         284     6,005 SH      SOLE                                  0           6,005
------------------------------------------------------------------------------------------------------------------------------------
PNC FINANCIAL SVCS GROUP
INC                       COMMON     693475105       4,953    66,900 SH      SOLE                             66,900               0
------------------------------------------------------------------------------------------------------------------------------------
PPG INDUSTRIES INC        COMMON     693506107       4,630    72,100 SH      SOLE                             72,100               0
------------------------------------------------------------------------------------------------------------------------------------
PSS WORLD MEDICAL INC     COMMON     69366A100       6,435   329,500 SH      SOLE                            329,500               0
------------------------------------------------------------------------------------------------------------------------------------




Page 7 of 9                                                           12/31/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
PACTIV CORP               COMMON     695257105       8,016   224,600 SH      SOLE                            224,600               0
------------------------------------------------------------------------------------------------------------------------------------
PALM INC                  COMMON     696643105      18,139 1,287,400 SH      SOLE                          1,287,400               0
------------------------------------------------------------------------------------------------------------------------------------
PANTRY INC                COMMON     698657103      19,799   422,700 SH      SOLE                            422,700               0
------------------------------------------------------------------------------------------------------------------------------------
PAPA JOHNS INTERNATIONAL
INC                       COMMON     698813102      19,930   687,000 SH      SOLE                            687,000               0
------------------------------------------------------------------------------------------------------------------------------------
PAYLESS SHOESOURCE INC    COMMON     704379106      31,474   959,000 SH      SOLE                            959,000               0
------------------------------------------------------------------------------------------------------------------------------------
PETRO-CANADA               ADR       71644E102      21,821   531,700 SH      SOLE                            531,700               0
------------------------------------------------------------------------------------------------------------------------------------
PETROCHINA CO LTD  -ADR    ADR       71646E100       5,167    36,700 SH      SOLE                             36,700               0
------------------------------------------------------------------------------------------------------------------------------------
PFIZER INC                COMMON     717081103      13,483   520,580 SH      SOLE                            518,250           2,330
------------------------------------------------------------------------------------------------------------------------------------
PHILLIPS-VAN HEUSEN CORP  COMMON     718592108       7,706   153,600 SH      SOLE                            153,600               0
------------------------------------------------------------------------------------------------------------------------------------
PLAYTEX PRODUCTS INC      COMMON     72813P100      24,417 1,696,800 SH      SOLE                          1,696,800               0
------------------------------------------------------------------------------------------------------------------------------------
PLEXUS CORP               COMMON     729132100      22,891   958,600 SH      SOLE                            958,600               0
------------------------------------------------------------------------------------------------------------------------------------
PRICELINE.COM INC         COMMON     741503403       7,427   170,300 SH      SOLE                            170,300               0
------------------------------------------------------------------------------------------------------------------------------------
QUANTA SERVICES INC       COMMON     74762E102      33,781 1,717,400 SH      SOLE                          1,717,400               0
------------------------------------------------------------------------------------------------------------------------------------
QWEST COMMUNICATION INTL
INC                       COMMON     749121109       4,543   542,722 SH      SOLE                            542,000             722
------------------------------------------------------------------------------------------------------------------------------------
REGIONS FINL CORP         COMMON     7591EP100       4,858   129,900 SH      SOLE                            129,900               0
------------------------------------------------------------------------------------------------------------------------------------
RELIANCE STEEL & ALUMINUM
CO                        COMMON     759509102      27,531   699,100 SH      SOLE                            699,100               0
------------------------------------------------------------------------------------------------------------------------------------
REYNOLDS AMERICAN INC     COMMON     761713106       4,779    73,000 SH      SOLE                             73,000               0
------------------------------------------------------------------------------------------------------------------------------------
ROYAL DUTCH SHELL PLC
-ADR                       ADR       780259206       4,736    66,900 SH      SOLE                             66,900               0
------------------------------------------------------------------------------------------------------------------------------------
RYDER SYSTEM INC          COMMON     783549108       3,937    77,100 SH      SOLE                             77,100               0
------------------------------------------------------------------------------------------------------------------------------------
RYERSON INC               COMMON     78375P107      21,206   845,200 SH      SOLE                            845,200               0
------------------------------------------------------------------------------------------------------------------------------------
SAFETY INSURANCE GROUP
INC                       COMMON     78648T100       4,194    82,700 SH      SOLE                             82,700               0
------------------------------------------------------------------------------------------------------------------------------------




Page 8 of 9                                                           12/31/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
SAIA INC                  COMMON     78709Y105       3,560   153,400 SH      SOLE                            153,400               0
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SASOL LTD  -ADR            ADR       803866300       4,808   130,300 SH      SOLE                            130,300               0
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THE CHARLES SCHWAB CORP   COMMON     808513105         195    10,100 SH      SOLE                                  0          10,100
------------------------------------------------------------------------------------------------------------------------------------
SIX FLAGS INC             COMMON     83001P109      11,603 2,214,300 SH      SOLE                          2,214,300               0
------------------------------------------------------------------------------------------------------------------------------------
SOUTHERN COPPER CORP      COMMON     84265V105       4,613    85,600 SH      SOLE                             85,600               0
------------------------------------------------------------------------------------------------------------------------------------
STANDARD PARKING CORP     COMMON     853790103       5,566   144,900 SH      SOLE                            144,900               0
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STATOIL ASA  -ADR          ADR       85771P102       4,467   169,700 SH      SOLE                            169,700               0
------------------------------------------------------------------------------------------------------------------------------------
SUNOCO INC                COMMON     86764P109      15,989   256,400 SH      SOLE                            256,400               0
------------------------------------------------------------------------------------------------------------------------------------
TESORO PETROLEUM CORP     COMMON     881609101      21,073   320,400 SH      SOLE                            320,400               0
------------------------------------------------------------------------------------------------------------------------------------
TRINITY INDUSTRIES        COMMON     896522109      26,583   755,200 SH      SOLE                            755,200               0
------------------------------------------------------------------------------------------------------------------------------------
U G I CORPORATION NEW     COMMON     902681105         458    16,800 SH      SOLE                                  0          16,800
------------------------------------------------------------------------------------------------------------------------------------
U S BANCORP               COMMON     902973304       5,095   140,775 SH      SOLE                            140,700              75
------------------------------------------------------------------------------------------------------------------------------------
USG CORP                  COMMON     903293405      17,015   310,500 SH      SOLE                            310,500               0
------------------------------------------------------------------------------------------------------------------------------------
UNITED AUTO GROUP INC     COMMON     909440109       6,326   268,400 SH      SOLE                            268,400               0
------------------------------------------------------------------------------------------------------------------------------------
UNIVERSAL TRUCKLOAD
SERVICES                  COMMON     91388P105       2,959   124,600 SH      SOLE                            124,600               0
------------------------------------------------------------------------------------------------------------------------------------
VF CORP                   COMMON     918204108       6,993    85,200 SH      SOLE                             85,200               0
------------------------------------------------------------------------------------------------------------------------------------
VALERO ENERGY CORP        COMMON     91913Y100      19,896   388,900 SH      SOLE                            388,900               0
------------------------------------------------------------------------------------------------------------------------------------
VERIZON COMMUNICATIONS    COMMON     92343V104      14,842   398,538 SH      SOLE                            385,175          13,363
------------------------------------------------------------------------------------------------------------------------------------
WABTEC CORP               COMMON     929740108      24,596   809,600 SH      SOLE                            809,600               0
------------------------------------------------------------------------------------------------------------------------------------
WACHOVIA CORP             COMMON     929903102       4,949    86,900 SH      SOLE                             86,900               0
------------------------------------------------------------------------------------------------------------------------------------
WASHINGTON MUTUAL INC     COMMON     939322103       4,867   107,000 SH      SOLE                            107,000               0
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Page 9 of 9                                                           12/31/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
----------------------------------------------------------------------------------------------------------------------------------
WATSCO INC                COMMON     942622200      16,265   344,900 SH      SOLE                            344,900               0
------------------------------------------------------------------------------------------------------------------------------------
WATSON WYATT WORLDWIDE
INC                       COMMON     942712100       7,021   155,500 SH      SOLE                            155,500               0
------------------------------------------------------------------------------------------------------------------------------------
WELLCARE HEALTH PLANS INC COMMON     94946T106       7,565   109,800 SH      SOLE                            109,800               0
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WELLS FARGO & CO          COMMON     949746101       5,872   165,138 SH      SOLE                            134,700          30,438
------------------------------------------------------------------------------------------------------------------------------------
WEST PHARMACEUTICAL SVSC
INC                       COMMON     955306105       8,520   166,300 SH      SOLE                            166,300               0
------------------------------------------------------------------------------------------------------------------------------------
WESTAMERICA BANCORP       COMMON     957090103         475     9,383 SH      SOLE                                  0           9,383
------------------------------------------------------------------------------------------------------------------------------------
WESTERN DIGITAL CORP      COMMON     958102105      21,508 1,051,200 SH      SOLE                          1,051,200               0
------------------------------------------------------------------------------------------------------------------------------------
WEYERHAEUSER CO           COMMON     962166104       4,995    70,700 SH      SOLE                             70,700               0
------------------------------------------------------------------------------------------------------------------------------------
WILD OATS MARKETS INC     COMMON     96808B107       3,382   235,200 SH      SOLE                            235,200               0
------------------------------------------------------------------------------------------------------------------------------------
WIMM-BILL-DANN  -ADR       ADR       97263M109       7,141   107,300 SH      SOLE                            107,300               0
------------------------------------------------------------------------------------------------------------------------------------
WORLD FUEL SERVICES CORP  COMMON     981475106       4,104    92,300 SH      SOLE                             92,300               0
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                                                 1,997,283
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