1986 October 13, 2017/in Timeline Stories /by ICON AdvisersDr. Callahan founds the predecessor firm to ICON implementing a modified version of Benjamin Graham’s valuation model. Go Back https://iconadvisers.com/wp-content/uploads/2017/11/ICON_Advisers_logo.png 0 0 ICON Advisers https://iconadvisers.com/wp-content/uploads/2017/11/ICON_Advisers_logo.png ICON Advisers2017-10-13 21:52:492018-04-10 12:17:271986