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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:  September 30, 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                October 18, 2006
--------------------------------------------------------------------------------
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:                       177
                                                 ----------------------

Form 13F Information Table Value Total:                $2,044,444
                                                 ----------------------
                                                       (thousands)



List of Other Included Managers:  NONE







Page 1 of 9                                                           09/30/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
A T & T INC               COMMON     00206R102      15,345   471,271 SH      SOLE                          463,775             7,496
------------------------------------------------------------------------------------------------------------------------------------
AAR CORP                  COMMON     000361105      22,512   944,300 SH      SOLE                          944,300                 0
------------------------------------------------------------------------------------------------------------------------------------
AEP INDUSTRIES INC        COMMON     001031103       5,328   127,000 SH      SOLE                          127,000                 0
------------------------------------------------------------------------------------------------------------------------------------
AES CORP. (THE)           COMMON     00130H105       4,965   243,500 SH      SOLE                          243,500                 0
------------------------------------------------------------------------------------------------------------------------------------
ALERIS INTERNATIONAL INC  COMMON     014477103      34,964   691,800 SH      SOLE                          691,800                 0
------------------------------------------------------------------------------------------------------------------------------------
ALLEGHENY TECHNOLOGIES
INC                       COMMON     01741R102      53,813   865,300 SH      SOLE                          865,300                 0
------------------------------------------------------------------------------------------------------------------------------------
ALON USA ENERGY INC       COMMON     020520102       4,196   142,300 SH      SOLE                          142,300                 0
------------------------------------------------------------------------------------------------------------------------------------
ALTRIA GROUP INC          COMMON     02209S103      12,571   164,219 SH      SOLE                          163,775               444
------------------------------------------------------------------------------------------------------------------------------------
AMERCO                    COMMON     023586100      25,396   342,500 SH      SOLE                          342,500                 0
------------------------------------------------------------------------------------------------------------------------------------
AMN HEALTHCARE SERVICES
INC                       COMMON     001744101       5,123   215,700 SH      SOLE                          215,700                 0
------------------------------------------------------------------------------------------------------------------------------------
AMPCO-PITTSBURGH CORP     COMMON     032037103       5,103   165,000 SH      SOLE                          165,000                 0
------------------------------------------------------------------------------------------------------------------------------------
AMR CORP/DE               COMMON     001765106       4,508   195,800 SH      SOLE                          194,800             1,000
------------------------------------------------------------------------------------------------------------------------------------
ANNTAYLOR STORES CORP     COMMON     036115103       4,990   119,200 SH      SOLE                          119,200                 0
------------------------------------------------------------------------------------------------------------------------------------
ARCH CHEMICALS INC        COMMON     03937R102       3,932   138,200 SH      SOLE                          138,200                 0
------------------------------------------------------------------------------------------------------------------------------------
ARCHER-DANIELS-MIDLAND CO COMMON     039483102       4,379   115,600 SH      SOLE                          115,600                 0
------------------------------------------------------------------------------------------------------------------------------------
ARKANSAS BEST CORP        COMMON     040790107       4,372   101,600 SH      SOLE                          101,600                 0
------------------------------------------------------------------------------------------------------------------------------------
ASTEC INDUSTRIES INC      COMMON     046224101      17,834   706,300 SH      SOLE                          706,300                 0
------------------------------------------------------------------------------------------------------------------------------------
BANCO BRADESCO SA  -ADR    ADR       059460303      24,125   723,400 SH      SOLE                          723,400                 0
------------------------------------------------------------------------------------------------------------------------------------
BANCO ITAU HLDG
FINCIERA-ADR               ADR       059602201      26,244   874,800 SH      SOLE                          874,800                 0
------------------------------------------------------------------------------------------------------------------------------------
BANK of AMERICA CORP      COMMON     060505104       5,351    99,891 SH      SOLE                           88,500            11,391
------------------------------------------------------------------------------------------------------------------------------------
BEACON ROOFING SUPPLY INC COMMON     073685109      23,379 1,155,100 SH      SOLE                        1,155,100                 0
------------------------------------------------------------------------------------------------------------------------------------




Page 2 of 9                                                           09/30/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
BELDEN CDT INC            COMMON     077454106       6,132   160,400 SH      SOLE                          160,400                 0
------------------------------------------------------------------------------------------------------------------------------------
BELLSOUTH CORP            COMMON     079860102       6,448   150,838 SH      SOLE                          147,100             3,738
------------------------------------------------------------------------------------------------------------------------------------
BERKLEY (W R) CORP        COMMON     084423102      24,922   704,200 SH      SOLE                          704,200                 0
------------------------------------------------------------------------------------------------------------------------------------
BP PLC  -ADS               ADR       055622104       3,987    60,800 SH      SOLE                           60,500               300
------------------------------------------------------------------------------------------------------------------------------------
BRIGHTPOINT INC           COMMON     109473405      20,450 1,438,100 SH      SOLE                        1,438,100                 0
------------------------------------------------------------------------------------------------------------------------------------
BRISTOL MYERS SQUIBB      COMMON     110122108       4,745   190,400 SH      SOLE                          189,600               800
------------------------------------------------------------------------------------------------------------------------------------
BUILDING MATERIALS
HLDG CP                   COMMON     120113105       4,660   179,100 SH      SOLE                          179,100                 0
------------------------------------------------------------------------------------------------------------------------------------
CASUAL MALE RETAIL GRP
INC                       COMMON     148711104       6,364   463,500 SH      SOLE                          463,500                 0
------------------------------------------------------------------------------------------------------------------------------------
CB RICHARD ELLIS GROUP
INC                       COMMON     12497T101      13,540   550,400 SH      SOLE                          529,400            21,000
------------------------------------------------------------------------------------------------------------------------------------
CELADON GROUP INC         COMMON     150838100       4,235   254,500 SH      SOLE                          254,500                 0
------------------------------------------------------------------------------------------------------------------------------------
CENVEO INC                COMMON     15670S105       5,049   268,300 SH      SOLE                          268,300                 0
------------------------------------------------------------------------------------------------------------------------------------
CHAPARRAL STEEL CO        COMMON     159423102       4,942   145,100 SH      SOLE                          145,100                 0
------------------------------------------------------------------------------------------------------------------------------------
CHEVRONTEXACO CORP        COMMON     166764100       5,484    84,557 SH      SOLE                           69,000            15,557
------------------------------------------------------------------------------------------------------------------------------------
CHUNGHWA TELECOM CO  -ADR  ADR       17133Q205       4,051   234,000 SH      SOLE                          234,000                 0
------------------------------------------------------------------------------------------------------------------------------------
CIRCUIT CITY STORES INC   COMMON     172737108      24,831   988,900 SH      SOLE                          988,900                 0
------------------------------------------------------------------------------------------------------------------------------------
CITIGROUP INC             COMMON     172967101      12,555   252,775 SH      SOLE                          252,775                 0
------------------------------------------------------------------------------------------------------------------------------------
CLEAN HARBORS INC         COMMON     184496107       5,757   132,200 SH      SOLE                          132,200                 0
------------------------------------------------------------------------------------------------------------------------------------
CLEVELAND-CLIFFS INC      COMMON     185896107       7,298   191,500 SH      SOLE                          191,500                 0
------------------------------------------------------------------------------------------------------------------------------------
CMS ENERGY CORP           COMMON     125896100       7,390   511,800 SH      SOLE                          511,800                 0
------------------------------------------------------------------------------------------------------------------------------------
COCA-COLA COMPANY         COMMON     191216100       1,889    42,275 SH      SOLE                           42,275                 0
------------------------------------------------------------------------------------------------------------------------------------
COMMERCIAL METALS         COMMON     201723103      10,356   509,400 SH      SOLE                          509,400                 0
------------------------------------------------------------------------------------------------------------------------------------





Page 3 of 9                                                           09/30/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
CONAGRA FOODS INC         COMMON     205887102       4,938   201,700 SH      SOLE                          201,700                 0
------------------------------------------------------------------------------------------------------------------------------------
CONN'S INC                COMMON     208242107      12,272   588,000 SH      SOLE                          588,000                 0
------------------------------------------------------------------------------------------------------------------------------------
CONTINENTAL AIRLS INC
-CL B                     CLASS B    210795308       4,691   165,700 SH      SOLE                          165,700                 0
------------------------------------------------------------------------------------------------------------------------------------
CRAY INC                  COMMON     225223304       4,785   430,300 SH      SOLE                          430,300                 0
------------------------------------------------------------------------------------------------------------------------------------
CROSSTEX ENERGY INC       COMMON     22765Y104       4,702    52,500 SH      SOLE                           52,500                 0
------------------------------------------------------------------------------------------------------------------------------------
CUMMINS INC               COMMON     231021106       4,996    41,900 SH      SOLE                           41,900                 0
------------------------------------------------------------------------------------------------------------------------------------
DAIMLERCHRYSLER AG         ADR       sedol           3,962    79,300 SH      SOLE                           79,300                 0
                                     - 2307389
------------------------------------------------------------------------------------------------------------------------------------
DIAGEO PLC  -ADR           ADR       25243Q205       4,838    68,100 SH      SOLE                           68,100                 0
------------------------------------------------------------------------------------------------------------------------------------
DILLARDS INC  -CL A       CLASS A    254067101       5,378   164,300 SH      SOLE                          164,300                 0
------------------------------------------------------------------------------------------------------------------------------------
DONNELLEY (R R) & SONS CO COMMON     257867101       3,902   118,400 SH      SOLE                          118,400                 0
------------------------------------------------------------------------------------------------------------------------------------
DOW CHEMICAL              COMMON     260543103       3,547    91,000 SH      SOLE                           91,000                 0
------------------------------------------------------------------------------------------------------------------------------------
DRESS BARN INC            COMMON     261570105      26,740 1,225,500 SH      SOLE                        1,225,500                 0
------------------------------------------------------------------------------------------------------------------------------------
DREW INDUSTRIES INC       COMMON     26168L205      20,107   796,000 SH      SOLE                          796,000                 0
------------------------------------------------------------------------------------------------------------------------------------
DSW INC                   COMMON     23334L102       4,602   146,100 SH      SOLE                          146,100                 0
------------------------------------------------------------------------------------------------------------------------------------
DU PONT (E I) DE NEMOURS  COMMON     263534109      12,537   292,650 SH      SOLE                          292,650                 0
------------------------------------------------------------------------------------------------------------------------------------
EMC INSURANCE GROUP INC   COMMON     268664109       4,464   154,800 SH      SOLE                          154,800                 0
------------------------------------------------------------------------------------------------------------------------------------
EMCOR GROUP INC           COMMON     29084Q100      34,396   627,200 SH      SOLE                          627,200                 0
------------------------------------------------------------------------------------------------------------------------------------
ESCALA GROUP INC          COMMON     29605W107       5,919 1,088,100 SH      SOLE                        1,088,100                 0
------------------------------------------------------------------------------------------------------------------------------------
EXPRESS SCRIPTS INC       COMMON     302182100      30,678   406,600 SH      SOLE                          406,600                 0
------------------------------------------------------------------------------------------------------------------------------------
EXXON MOBIL CORPORATION   COMMON     30231G102         383     5,713 SH      SOLE                                0             5,713
------------------------------------------------------------------------------------------------------------------------------------
FEDERAL HOME LOAN MORTG
CORP                      COMMON     313400301       4,252    64,100 SH      SOLE                           64,100                 0
------------------------------------------------------------------------------------------------------------------------------------




Page 4 of 9                                                           09/30/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
FLOWSERVE CORP            COMMON     34354P105      11,990   237,000 SH      SOLE                          237,000                 0
------------------------------------------------------------------------------------------------------------------------------------
FMC TECHNOLOGIES INC      COMMON     30249U101       3,850    71,700 SH      SOLE                           71,700                 0
------------------------------------------------------------------------------------------------------------------------------------
FORD MOTOR CO             COMMON     345370860       4,019   496,746 SH      SOLE                          496,500               246
------------------------------------------------------------------------------------------------------------------------------------
FOSTER WHEELER LTD        COMMON     sedol          21,996   570,000 SH      SOLE                          570,000                 0
                                     B04MB31
------------------------------------------------------------------------------------------------------------------------------------
FRONTIER OIL CORP         COMMON     35914P105      44,078 1,658,300 SH      SOLE                        1,658,300                 0
------------------------------------------------------------------------------------------------------------------------------------
GENERAL CABLE CORP/DE     COMMON     369300108      41,691 1,091,100 SH      SOLE                        1,091,100                 0
------------------------------------------------------------------------------------------------------------------------------------
GENERAL ELECTRIC CO.      COMMON     369604103       6,686   189,401 SH      SOLE                          188,175             1,226
------------------------------------------------------------------------------------------------------------------------------------
GENERAL MOTORS CORP       COMMON     370442105      16,629   499,966 SH      SOLE                          499,600               366
------------------------------------------------------------------------------------------------------------------------------------
GENTEK INC                COMMON     37245X203       4,719   170,900 SH      SOLE                          170,900                 0
------------------------------------------------------------------------------------------------------------------------------------
GERBER SCIENTIFIC INC     COMMON     373730100       5,270   351,800 SH      SOLE                          351,800                 0
------------------------------------------------------------------------------------------------------------------------------------
GIANT INDUSTRIES INC      COMMON     374508109      33,869   417,100 SH      SOLE                          417,100                 0
------------------------------------------------------------------------------------------------------------------------------------
GLAXOSMITHKLINE PLC  -ADR  ADR       37733W105       4,264    80,100 SH      SOLE                           80,100                 0
------------------------------------------------------------------------------------------------------------------------------------
GOODYEAR TIRE & RUBBER CO COMMON     382550101       7,763   535,400 SH      SOLE                          535,400                 0
------------------------------------------------------------------------------------------------------------------------------------
GREAT ATLANTIC & PAC
TEA CO                    COMMON     390064103      23,892   992,200 SH      SOLE                          992,200                 0
------------------------------------------------------------------------------------------------------------------------------------
GYMBOREE CORP             COMMON     403777105       6,251   148,200 SH      SOLE                          148,200                 0
------------------------------------------------------------------------------------------------------------------------------------
HANESBRANDS INC           COMMON     410345102         640    28,453 SH      SOLE                           28,300               153
------------------------------------------------------------------------------------------------------------------------------------
HARLEYSVILLE GROUP INC    COMMON     412824104       5,203   148,700 SH      SOLE                          148,700                 0
------------------------------------------------------------------------------------------------------------------------------------
HEINZ (H J) CO            COMMON     423074103       4,952   118,100 SH      SOLE                          118,100                 0
------------------------------------------------------------------------------------------------------------------------------------
HENNESSY ADVISORS INC     COMMON     425885100      47,309 1,907,601 SH      SOLE                                0         1,907,601
------------------------------------------------------------------------------------------------------------------------------------
HOLLY CORP                COMMON     435758305      47,832 1,103,900 SH      SOLE                        1,103,900                 0
------------------------------------------------------------------------------------------------------------------------------------
HSBC HOLDINGS PLC  -ADR    ADR       404280406       4,622    50,500 SH      SOLE                           50,500                 0
------------------------------------------------------------------------------------------------------------------------------------




Page 5 of 9                                                           09/30/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
HUMANA INC                COMMON     444859102      11,130   168,400 SH      SOLE                          168,400                 0
------------------------------------------------------------------------------------------------------------------------------------
ING GROEP NV  -ADR         ADR       456837103       5,264   119,700 SH      SOLE                          119,700                 0
------------------------------------------------------------------------------------------------------------------------------------
INTERSTATE HOTELS &
RESORTS                   COMMON     46088S106       5,623   521,660 SH      SOLE                          521,600                60
------------------------------------------------------------------------------------------------------------------------------------
INTL PAPER CO             COMMON     460146103       4,166   120,300 SH      SOLE                          120,000               300
------------------------------------------------------------------------------------------------------------------------------------
IPSCO INC                  ADR       462622101      24,649   284,400 SH      SOLE                          284,400                 0
------------------------------------------------------------------------------------------------------------------------------------
J P MORGAN CHASE & CO     COMMON     46625H100      14,042   299,015 SH      SOLE                          298,725               290
------------------------------------------------------------------------------------------------------------------------------------
JABIL CIRCUIT INC         COMMON     466313103      17,991   629,700 SH      SOLE                          629,700                 0
------------------------------------------------------------------------------------------------------------------------------------
JACOBS ENGINEERING GROUP
INC                       COMMON     469814107       9,289   124,300 SH      SOLE                          124,300                 0
------------------------------------------------------------------------------------------------------------------------------------
JLG INDUSTRIES INC        COMMON     466210101      28,744 1,451,000 SH      SOLE                        1,451,000                 0
------------------------------------------------------------------------------------------------------------------------------------
KIMBERLY-CLARK CORP       COMMON     494368103       4,629    70,826 SH      SOLE                           69,700             1,126
------------------------------------------------------------------------------------------------------------------------------------
KRAFT FOODS INC           COMMON     50075N104       4,957   139,000 SH      SOLE                          139,000                 0
------------------------------------------------------------------------------------------------------------------------------------
LABOR READY INC           COMMON     505401208       5,129   322,000 SH      SOLE                          322,000                 0
------------------------------------------------------------------------------------------------------------------------------------
LENNOX INTERNATIONAL INC  COMMON     526107107       7,200   314,400 SH      SOLE                          314,400                 0
------------------------------------------------------------------------------------------------------------------------------------
LILLY (ELI) & CO          COMMON     532457108       4,332    76,000 SH      SOLE                           76,000                 0
------------------------------------------------------------------------------------------------------------------------------------
LINCOLN ELECTRIC HLDGS
INC                       COMMON     533900106       4,438    81,500 SH      SOLE                           81,500                 0
------------------------------------------------------------------------------------------------------------------------------------
LINCOLN NATIONAL CORP     COMMON     534187109       4,879    78,600 SH      SOLE                           78,600                 0
------------------------------------------------------------------------------------------------------------------------------------
LYONDELL CHEMICAL CO      COMMON     552078107       4,125   162,600 SH      SOLE                          162,600                 0
------------------------------------------------------------------------------------------------------------------------------------
MANITOWOC CO              COMMON     563571108      35,644   795,800 SH      SOLE                          795,800                 0
------------------------------------------------------------------------------------------------------------------------------------
MARATHON OIL CORP         COMMON     565849106      29,976   389,800 SH      SOLE                          389,800                 0
------------------------------------------------------------------------------------------------------------------------------------
MATRIX SERVICE COMPANY    COMMON     576853105       5,503   420,400 SH      SOLE                          420,400                 0
------------------------------------------------------------------------------------------------------------------------------------
MATTEL INC                COMMON     577081102       4,848   246,100 SH      SOLE                          246,100                 0
------------------------------------------------------------------------------------------------------------------------------------




Page 6 of 9                                                           09/30/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
MCDERMOTT INTL INC        COMMON     580037109      14,216   340,100 SH      SOLE                          340,100                 0
------------------------------------------------------------------------------------------------------------------------------------
MEADOWBROOK INS GROUP INC COMMON     58319P108       5,219   463,500 SH      SOLE                          463,500                 0
------------------------------------------------------------------------------------------------------------------------------------
MEADWESTVACO CORP         COMMON     583334107       3,817   144,000 SH      SOLE                          144,000                 0
------------------------------------------------------------------------------------------------------------------------------------
MENTOR GRAPHICS CORP      COMMON     587200106       5,346   379,700 SH      SOLE                          379,700                 0
------------------------------------------------------------------------------------------------------------------------------------
MERCK & CO                COMMON     589331107      15,600   372,317 SH      SOLE                          371,825               492
------------------------------------------------------------------------------------------------------------------------------------
NATCO GROUP INC           COMMON     63227W203       3,894   135,200 SH      SOLE                          135,200                 0
------------------------------------------------------------------------------------------------------------------------------------
NATIONAL BEVERAGE CORP    COMMON     635017106       3,550   298,100 SH      SOLE                          298,100                 0
------------------------------------------------------------------------------------------------------------------------------------
NATIONAL CITY CORP        COMMON     635405103       4,330   118,300 SH      SOLE                          118,300                 0
------------------------------------------------------------------------------------------------------------------------------------
NORDSTROM INC             COMMON     655664100      25,257   597,100 SH      SOLE                          597,100                 0
------------------------------------------------------------------------------------------------------------------------------------
OFFICE DEPOT INC          COMMON     676220106      11,132   280,400 SH      SOLE                          280,400                 0
------------------------------------------------------------------------------------------------------------------------------------
OGE ENERGY CORP           COMMON     670837103       4,793   132,720 SH      SOLE                          132,100               620
------------------------------------------------------------------------------------------------------------------------------------
OIL STATES INTL INC       COMMON     678026105      23,900   869,100 SH      SOLE                          869,100                 0
------------------------------------------------------------------------------------------------------------------------------------
OLD DOMINION FREIGHT      COMMON     679580100       4,162   138,600 SH      SOLE                          138,600                 0
------------------------------------------------------------------------------------------------------------------------------------
ON SEMICONDUCTOR CORP     COMMON     682189105      20,227 3,439,900 SH      SOLE                        3,439,900                 0
------------------------------------------------------------------------------------------------------------------------------------
P G & E CORP              COMMON     69331C108         250     6,005 SH      SOLE                                0             6,005
------------------------------------------------------------------------------------------------------------------------------------
P.A.M. TRANSPORTATION
SVCS                      COMMON     693149106       3,942   157,300 SH      SOLE                          157,300                 0
------------------------------------------------------------------------------------------------------------------------------------
PALM INC                  COMMON     696643105      19,755 1,356,800 SH      SOLE                        1,356,800                 0
------------------------------------------------------------------------------------------------------------------------------------
PANTRY INC                COMMON     698657103      25,113   445,500 SH      SOLE                          445,500                 0
------------------------------------------------------------------------------------------------------------------------------------
PAPA JOHNS INTERNATIONAL
INC                       COMMON     698813102      26,144   724,000 SH      SOLE                          724,000                 0
------------------------------------------------------------------------------------------------------------------------------------
PAYLESS SHOESOURCE INC    COMMON     704379106      25,166 1,010,700 SH      SOLE                        1,010,700                 0
------------------------------------------------------------------------------------------------------------------------------------
PETRO-CANADA               ADR       71644E102      22,601   560,400 SH      SOLE                          560,400                 0
------------------------------------------------------------------------------------------------------------------------------------




Page 7 of 9                                                           09/30/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
PFIZER INC                COMMON     717081103      14,873   524,453 SH      SOLE                          522,125             2,328
------------------------------------------------------------------------------------------------------------------------------------
PITNEY BOWES INC          COMMON     724479100       4,313    97,200 SH      SOLE                           97,200                 0
------------------------------------------------------------------------------------------------------------------------------------
PLAYTEX PRODUCTS INC      COMMON     72813P100      23,962 1,788,200 SH      SOLE                        1,788,200                 0
------------------------------------------------------------------------------------------------------------------------------------
PLEXUS CORP               COMMON     729132100      19,398 1,010,300 SH      SOLE                        1,010,300                 0
------------------------------------------------------------------------------------------------------------------------------------
PNC FINANCIAL SVCS GROUP
INC                       COMMON     693475105       4,607    63,600 SH      SOLE                           63,600                 0
------------------------------------------------------------------------------------------------------------------------------------
PPG INDUSTRIES INC        COMMON     693506107       4,669    69,600 SH      SOLE                           69,600                 0
------------------------------------------------------------------------------------------------------------------------------------
QUANEX CORP               COMMON     747620102       6,064   199,800 SH      SOLE                          199,800                 0
------------------------------------------------------------------------------------------------------------------------------------
QUANTA SERVICES INC       COMMON     74762E102      41,533 2,463,400 SH      SOLE                        2,463,400                 0
------------------------------------------------------------------------------------------------------------------------------------
QWEST COMMUNICATION INTL
INC                       COMMON     749121109       5,438   623,622 SH      SOLE                          622,900               722
------------------------------------------------------------------------------------------------------------------------------------
REGIONS FINL CORP         COMMON     7591EP100       4,418   120,100 SH      SOLE                          120,100                 0
------------------------------------------------------------------------------------------------------------------------------------
RELIANCE STEEL & ALUMINUM
CO                        COMMON     759509102      23,681   736,800 SH      SOLE                          736,800                 0
------------------------------------------------------------------------------------------------------------------------------------
REYNOLDS AMERICAN INC     COMMON     761713106       5,441    87,800 SH      SOLE                           87,800                 0
------------------------------------------------------------------------------------------------------------------------------------
RYDER SYSTEM INC          COMMON     783549108       4,579    88,600 SH      SOLE                           88,600                 0
------------------------------------------------------------------------------------------------------------------------------------
RYERSON INC               COMMON     78375P107      19,500   890,800 SH      SOLE                          890,800                 0
------------------------------------------------------------------------------------------------------------------------------------
SAFETY INSURANCE GROUP
INC                       COMMON     78648T100       4,623    95,000 SH      SOLE                           95,000                 0
------------------------------------------------------------------------------------------------------------------------------------
SAIA INC                  COMMON     78709Y105       5,747   176,300 SH      SOLE                          176,300                 0
------------------------------------------------------------------------------------------------------------------------------------
SARA LEE CORP             COMMON     803111103       3,655   227,428 SH      SOLE                          226,200             1,228
------------------------------------------------------------------------------------------------------------------------------------
SHAW GROUP INC            COMMON     820280105       8,236   348,400 SH      SOLE                          348,400                 0
------------------------------------------------------------------------------------------------------------------------------------
SIERRA PACIFIC RESOURCES  COMMON     826428104       7,956   554,800 SH      SOLE                          554,800                 0
------------------------------------------------------------------------------------------------------------------------------------
SIX FLAGS INC             COMMON     83001P109      12,205 2,333,600 SH      SOLE                        2,333,600                 0
------------------------------------------------------------------------------------------------------------------------------------
SKYWEST INC               COMMON     830879102       7,626   311,000 SH      SOLE                          311,000                 0
------------------------------------------------------------------------------------------------------------------------------------




Page 8 of 9                                                           09/30/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
STANDARD PARKING CORP     COMMON     853790103       5,225   166,500 SH      SOLE                          166,500                 0
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SUNOCO INC                COMMON     86764P109      16,804   270,200 SH      SOLE                          270,200                 0
------------------------------------------------------------------------------------------------------------------------------------
TELEFONICA DE ARGENTINA
CONT                       ADR       879991024           0    12,900 SH      SOLE                           12,900                 0
------------------------------------------------------------------------------------------------------------------------------------
TELEFONICA DE ARGENTINA
CONT                       ADR       879991016           0    12,900 SH      SOLE                           12,900                 0
------------------------------------------------------------------------------------------------------------------------------------
TELEFONOS DE MEX
-SPON ADR                  ADR       879403780       4,489   175,500 SH      SOLE                          175,500                 0
------------------------------------------------------------------------------------------------------------------------------------
TESORO PETROLEUM CORP     COMMON     881609101      19,580   337,700 SH      SOLE                          337,700                 0
------------------------------------------------------------------------------------------------------------------------------------
THE CHARLES SCHWAB CORP   COMMON     808513105         181    10,100 SH      SOLE                                0            10,100
------------------------------------------------------------------------------------------------------------------------------------
TRINITY INDUSTRIES        COMMON     896522109      25,604   795,900 SH      SOLE                          795,900                 0
------------------------------------------------------------------------------------------------------------------------------------
TRW AUTOMOTIVE HOLDINGS
CORP                      COMMON     87264S106       7,028   292,000 SH      SOLE                          292,000                 0
------------------------------------------------------------------------------------------------------------------------------------
U G I CORPORATION NEW     COMMON     902681105         411    16,800 SH      SOLE                                0            16,800
------------------------------------------------------------------------------------------------------------------------------------
U S BANCORP               COMMON     902973304       4,477   134,775 SH      SOLE                          134,700                75
------------------------------------------------------------------------------------------------------------------------------------
UNIVERSAL TRUCKLOAD
SERVICES                  COMMON     91388P105       3,719   143,200 SH      SOLE                          143,200                 0
------------------------------------------------------------------------------------------------------------------------------------
USG CORP                  COMMON     903293405      21,427   455,500 SH      SOLE                          455,500                 0
------------------------------------------------------------------------------------------------------------------------------------
VALERO ENERGY CORP        COMMON     91913Y100      21,098   409,900 SH      SOLE                          409,900                 0
------------------------------------------------------------------------------------------------------------------------------------
VERIZON COMMUNICATIONS    COMMON     92343V104      14,550   391,862 SH      SOLE                          378,500            13,362
------------------------------------------------------------------------------------------------------------------------------------
VODAFONE GROUP PLC  -ADR   ADR       92857W209       3,657   159,957 SH      SOLE                          157,400             2,557
------------------------------------------------------------------------------------------------------------------------------------
WABTEC CORP               COMMON     929740108      23,147   853,200 SH      SOLE                          853,200                 0
------------------------------------------------------------------------------------------------------------------------------------
WACHOVIA CORP             COMMON     929903102       4,291    76,900 SH      SOLE                           76,900                 0
------------------------------------------------------------------------------------------------------------------------------------
WALTER INDUSTRIES INC     COMMON     93317Q105       7,503   175,800 SH      SOLE                          175,800                 0
------------------------------------------------------------------------------------------------------------------------------------
WASHINGTON MUTUAL INC     COMMON     939322103       4,247    97,700 SH      SOLE                           97,700                 0
------------------------------------------------------------------------------------------------------------------------------------
WATSCO INC                COMMON     942622200      16,725   363,500 SH      SOLE                          363,500                 0
------------------------------------------------------------------------------------------------------------------------------------




Page 9 of 9                                                           09/30/2006


                                                     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
----------------------------------------------------------------------------------------------------------------------------------
                                                                                             
WELLCARE HEALTH PLANS INC COMMON     94946T106      11,230   198,300 SH      SOLE                          198,300                 0
------------------------------------------------------------------------------------------------------------------------------------
WELLS FARGO & CO          COMMON     949746101       5,792   160,080 SH      SOLE                          129,700            30,380
------------------------------------------------------------------------------------------------------------------------------------
WESTAMERICA BANCORP       COMMON     957090103         474     9,378 SH      SOLE                                0             9,378
------------------------------------------------------------------------------------------------------------------------------------
WESTERN DIGITAL CORP      COMMON     958102105      20,051 1,107,800 SH      SOLE                        1,107,800                 0
------------------------------------------------------------------------------------------------------------------------------------
WEYERHAEUSER CO           COMMON     962166104       3,772    61,300 SH      SOLE                           61,300                 0
------------------------------------------------------------------------------------------------------------------------------------
WILD OATS MARKETS INC     COMMON     96808B107       4,368   270,300 SH      SOLE                          270,300                 0
------------------------------------------------------------------------------------------------------------------------------------
WIMM-BILL-DANN  -ADR       ADR       97263M109       5,489   123,300 SH      SOLE                          123,300                 0
------------------------------------------------------------------------------------------------------------------------------------
WORLD FUEL SERVICES CORP  COMMON     981475106       4,292   106,100 SH      SOLE                          106,100                 0
------------------------------------------------------------------------------------------------------------------------------------
XL CAPITAL LTD             ADR       sedol           4,191    61,000 SH      SOLE                           61,000                 0
                                     - 2283401
------------------------------------------------------------------------------------------------------------------------------------
                   TOTAL                         2,044,444
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