AFFILIATED MANAGERS GROUP, INC. — Director's Dealing 2010

Sep 15, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AFFILIATED MANAGERS GROUP INC (AMG)
CIK: 0001004434
Period of Report: 2010-09-13

Reporting Person: RODRIGUEZ RITA M (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-09-13	Common Stock	M	5625	$44.35	Acquired	161	Direct
2010-09-13	Common Stock	M	11250	$41.33	Acquired	161	Direct
2010-09-13	Common Stock	S	16875	$75.22	Disposed	161	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-09-13	Director Stock Option (Right to Buy)	$44.35	M	5625	Disposed	2010-12-10	Common Stock (5625)	Direct
2010-09-13	Director Stock Option (Right to Buy)	$41.33	M	11250	Disposed	2011-01-24	Common Stock (11250)	Direct

Footnotes

F1: The sale price reflects the weighted average sales price of the shares sold; the individual transaction prices ranged from $75.11 to $75.27. Specific transaction details will be provided to the SEC upon request.