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

Feb 15, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AFFILIATED MANAGERS GROUP INC (AMG)
CIK: 0001004434
Period of Report: 2012-02-13

Reporting Person: DALTON NATHANIEL (President and COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-13	Common Stock	M	3222	$62.04	Acquired	62984	Direct
2012-02-13	Common Stock	M	55000	$45.27	Acquired	62984	Direct
2012-02-13	Common Stock	S	55000	$106.40	Disposed	62984	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-13	Employee Stock Option (Right to Buy)	$62.04	M	3222	Disposed	2016-07-21	Common Stock (3222)	Direct
2012-02-13	Employee Stock Option (Right to Buy)	$45.27	M	55000	Disposed	2014-07-27	Common Stock (55000)	Direct

Footnotes

F1: The sale reflects the weighted average sales price of the shares sold; the individual transaction prices ranged from $106.10 to $106.65. Specific transaction details will be provided to the SEC upon request.