X0306 4 2012-12-14 0 0001004434 AFFILIATED MANAGERS GROUP INC AMG 0001351034 Zeitlin Jide James C/O AFFILIATED MANAGERS GROUP, INC. 600 HALE STREET PRIDES CROSSING MA 01965 1 0 0 0 Director Stock Option (Right to Buy) 127.91 2012-12-14 4 A 0 1411 127.91 A 2016-12-31 2019-12-14 Common Stock 1411 1411 D Stock Units 2012-12-14 4 A 0 313 0 A 2017-01-01 Common Stock 313 313 D This option is exercisable in 25% increments on each of December 31, 2013, 2014, 2015 and 2016. The exercisability of this option would be accelerated upon a change of control of the Company. Represents stock units granted to the reporting person under the Company's Deferred Compensation Plan. Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting. The stock units vest in 25% increments on each of January 1, 2014, 2015, 2016 and 2017. The vesting of the stock units would be accelerated upon a change of control of the Company. /s/ John Kingston, III, Attorney-in-Fact 2012-12-14