NOVATO, Calif., Jan. 26 /PRNewswire-FirstCall/ -- Hennessy Advisors, Inc. (OTC:HNNA) (BULLETIN BOARD: HNNA) Chief Executive Officer and President, Neil Hennessy, today announced fully diluted earnings per share for Hennessy Advisors, Inc. of $0.35 for the quarter ended December 31, 2005, up from $0.31 per share in the prior comparable period, an increase of 13%. Growth in earnings is primarily attributable to increased mutual fund assets under management. Total mutual fund assets increased by 33%, growing to $1.83 billion on December 31, 2005, compared to $1.38 billion on December 31, 2004. The acquisition of The Henlopen Fund, which occurred on July 1, 2005, accounts for approximately two-thirds of the growth in assets, with the remainder in growth coming from market appreciation of the mutual funds managed by Hennessy Advisors, Inc. "We are delighted by the strong performance of our mutual funds which translates to strong financial results for the shareholders of Hennessy Advisors," said Mr. Hennessy. "We anticipate that our shareholders will be pleased with our quarterly growth in revenue, income and earnings," he added. Hennessy Advisors, Inc. Financial Highlights Period to Period Three Months Ended First Quarter Dec. 31, Dec. 31, 2005 2004 $ Change % Change Total Revenue $3,683,100 $2,700,264 $982,836 36.4% Net Income $895,027 $778,000 $117,027 15.0% Earnings per share (diluted) $0.35 $0.31 $0.04 12.9% Weighted average number of shares outstanding 2,582,494 2,537,237 45,257 1.8% At Period Ending Date Dec. 31, Dec. 31, 2005 2004 $ Change % Change Mutual fund assets under management $1,831,992,622 $1,376,303,290 $455,689,332 33.1% Hennessy Advisors, Inc., located in Novato, CA, is a publicly traded investment advisor to six no-load mutual funds. The Hennessy Funds employ superb, time-tested stock selection formulas and manage their funds with unwavering discipline and consistency. Hennessy Funds serves clients with integrity, honesty and candor, and their strategies and performance are fully disclosed. Supplemental Information Nothing in this section shall be considered a solicitation to buy or an offer to sell a security to any person in any jurisdiction where such offer, solicitation, purchase or sale would be unlawful under the securities laws of such jurisdiction. Mutual fund investing involves risk; loss of principal is possible. While the Hennessy Funds are no-load, management and distribution fees and other expenses apply. The distributor for the Hennessy Funds is Quasar Distributors, LLC. The funds' investment objectives, risks, charges and expenses must be considered carefully before investing. The prospectus contains this and other important information about the investment company, and it may be obtained by calling 800-966-4354 or by visiting http://www.hennessyfunds.com/. Read it carefully before you invest or send money. Available Topic Expert(s): For information on the listed expert(s), click appropriate link. Neil J. Hennessy http://profnet.prnewswire.com/ud_public.jsp?userid=496838 First Call Analyst: FCMN Contact: terry@hennessyfunds.com DATASOURCE: Hennessy Advisors, Inc. CONTACT: Terry Nilsen of Hennessy Advisors, Inc., +1-415-899-1555, or fax, +1-415-899-1559 Web site: http://www.hennessyadvisors.com/

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