Hennessy Advisors, Inc. revenue for the last year amounted to 33.39 M USD, the most of which — 27.52 M USD — came from its highest performing source at the moment, Investment Advisory, the year earlier bringing 22.09 M USD. The greatest contribution to the revenue figure was made by United States — last year it brought Hennessy Advisors, Inc. 29.65 M USD, and the year before that — 24.02 M USD.