AFFILIATED MANAGERS GROUP, INC. — Director's Dealing 2012

May 15, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AFFILIATED MANAGERS GROUP INC (AMG)
CIK: 0001004434
Period of Report: 2012-05-11

Reporting Person: MEYERMAN HAROLD J (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-11	Common Stock	M	5625	$71.75	Acquired	1310	Direct
2012-05-11	Common Stock	M	5625	$81.83	Acquired	1310	Direct
2012-05-11	Common Stock	S	11250	$106.94	Disposed	1310	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-11	Director Stock Option (Right to Buy)	$71.75	M	5625	Disposed	2015-07-26	Common Stock (5625)	Direct
2012-05-11	Director Stock Option (Right to Buy)	$81.83	M	5625	Disposed	2015-12-14	Common Stock (5625)	Direct

Footnotes

F1: The sale reflects the weighted average sales price of the shares sold; the individual transaction prices ranged from $106.65 to $107.05. Specific transaction details will be provided to the SEC upon request.