AFFILIATED MANAGERS GROUP, INC. — Director's Dealing 2014

May 12, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AFFILIATED MANAGERS GROUP, INC. (AMG)
CIK: 0001004434
Period of Report: 2014-05-08

Reporting Person: Horgen Jay C. (CFO and Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-05-08	Common Stock	M	15000	$65.51	Acquired	37199	Direct
2014-05-08	Common Stock	M	30000	$62.91	Acquired	37199	Direct
2014-05-08	Common Stock	M	15000	$95.82	Acquired	37199	Direct
2014-05-08	Common Stock	S	60000	$194.35	Disposed	37199	Direct
2014-05-09	Common Stock	M	13389	$62.04	Acquired	37199	Direct
2014-05-09	Common Stock	S	13389	$190.93	Disposed	37199	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-05-08	Employee Stock Option (Right to Buy)	$65.51	M	15000	Disposed	2016-12-02	Common Stock (15000)	Direct
2014-05-08	Employee Stock Option (Right to Buy)	$62.91	M	30000	Disposed	2017-07-20	Common Stock (30000)	Direct
2014-05-08	Employee Stock Option (Right to Buy)	$95.82	M	15000	Disposed	2017-12-14	Common Stock (15000)	Direct
2014-05-09	Employee Stock Option (Right to Buy)	$62.04	M	13389	Disposed	2016-07-21	Common Stock (13389)	Direct

Footnotes

F1: The sale reflects the weighted average sales price of the shares sold; the individual transaction prices ranged from $191.79 to $197.59. Specific transaction details will be provided to the SEC upon request.

F2: The sale reflects the weighted average sales price of the shares sold; the individual transaction prices ranged from $189.98 to $192.39. Specific transaction details will be provided to the SEC upon request.