CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements of Affiliated Managers Group, Inc. on Form S-3 (File No. 333-71561 and File No. 333-74558) and Form S-8 (File No. 333-72967 and File No. 333-8445) of our report dated October 31, 2001, relating to the combined financial statements of Friess Associates, Inc. and Friess Associates of Delaware, Inc. which appears in the current report on Form 8-K/A of Affiliated Managers Group, Inc. PricewaterhouseCoopers LLP Boston, Massachusetts January 11, 2002