<SEC-DOCUMENT>0001047469-16-015014.txt : 20160817
<SEC-HEADER>0001047469-16-015014.hdr.sgml : 20160817
<ACCEPTANCE-DATETIME>20160816173534
ACCESSION NUMBER:		0001047469-16-015014
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20160817
DATE AS OF CHANGE:		20160816

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AFFILIATED MANAGERS GROUP, INC.
		CENTRAL INDEX KEY:			0001004434
		STANDARD INDUSTRIAL CLASSIFICATION:	INVESTMENT ADVICE [6282]
		IRS NUMBER:				043218510
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B5
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-210819
		FILM NUMBER:		161836965

	BUSINESS ADDRESS:	
		STREET 1:		777 SOUTH FLAGLER DRIVE
		STREET 2:		SUITE 1201 EAST TOWER
		CITY:			WEST PALM BEACH
		STATE:			FL
		ZIP:			33401
		BUSINESS PHONE:		(800) 345-1100

	MAIL ADDRESS:	
		STREET 1:		777 SOUTH FLAGLER DRIVE
		STREET 2:		SUITE 1201 EAST TOWER
		CITY:			WEST PALM BEACH
		STATE:			FL
		ZIP:			33401

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AFFILIATED MANAGERS GROUP INC
		DATE OF NAME CHANGE:	19970822
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B5
<SEQUENCE>1
<FILENAME>a2229485z424b5.htm
<DESCRIPTION>424B5
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Use these links to rapidly review the document<BR>
<A HREF="#bg45301_table_of_contents">  TABLE OF CONTENTS</A><BR></font>
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<P ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><B>Filed Pursuant to Rule&nbsp;424(b)(5)<BR>
Registration No.&nbsp;333-210819  </B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><B> CALCULATION OF REGISTRATION FEE</B></FONT><FONT SIZE=2>(1) </FONT></P>

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<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
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<TH ALIGN="CENTER" style="font-family:times;"><FONT SIZE=1><B>Title of Securities<BR>
Being Registered</B></FONT><BR></TH>
<TH style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT></TH>
<TH ALIGN="CENTER" style="font-family:times;"><FONT SIZE=1><B>Proposed Maximum<BR>
Aggregate Offering<BR>
Price</B></FONT><BR></TH>
<TH style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT></TH>
<TH ALIGN="CENTER" style="font-family:times;"><FONT SIZE=1><B>Amount of<BR>
Registration Fee</B></FONT><BR></TH>
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<TD style="font-family:times;"><p style="font-family:times;margin-left:4pt;text-indent:-4pt;"><FONT SIZE=1><B> </B></FONT><FONT SIZE=2>Common Stock, par value $.01 per share, of Affiliated Managers Group,&nbsp;Inc.&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>$500,000,000</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>$50,350.00(2)</FONT></TD>
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<TD COLSPAN=5 VALIGN="BOTTOM" style="font-family:times;border-bottom:double #000000 2.25pt;"><p style="font-family:times;margin-left:5pt;text-indent:-5pt;"> &nbsp;</TD>
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<DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>(1)</FONT></DT><DD style="font-family:times;"><FONT SIZE=2>This
"Calculation of Registration Fee" table shall be deemed to update the "Calculation of Registration Fee" table in the Registration Statement on
Form&nbsp;S-3 (File No.&nbsp;333-210819) originally filed by Affiliated Managers Group,&nbsp;Inc. on April&nbsp;19, 2016, in accordance with Rules&nbsp;456(b) and 457(r) under the Securities
Act of 1933, as amended (the "Securities Act").
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>(2)</FONT></DT><DD style="font-family:times;"><FONT SIZE=2>Calculated
in accordance with Rules&nbsp;457(o) and 457(r) under the Securities Act.  </FONT></DD></DL>
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<P style="font-family:times;"><FONT SIZE=2>
PROSPECTUS SUPPLEMENT<BR>
(To Prospectus dated April&nbsp;18, 2016) </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>AFFILIATED MANAGERS GROUP,&nbsp;INC.  </B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>
<IMG SRC="g560721.jpg" ALT="LOGO" WIDTH="127" HEIGHT="115">
  </B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>Up to $500,000,000<BR>
Common Stock  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This prospectus supplement supersedes and replaces the prospectus supplement, filed on June&nbsp;6, 2016, which provided for the sale of
shares
of our common stock with an aggregate sales price of up to $500,000,000; we have not sold and will not sell any shares of common stock pursuant to that earlier prospectus supplement. We are filing
this prospectus supplement in connection with our entry into equity distribution agreements and forward sale agreements, described below, with an expanded group of financial institutions. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant
to this prospectus supplement, we may offer, issue and sell up to $500,000,000 in the aggregate of our common stock from time to time through or to Merrill Lynch, Pierce,
Fenner&nbsp;&amp; Smith Incorporated, Barclays Capital&nbsp;Inc., BMO Capital Markets Corp., Citigroup Global Markets&nbsp;Inc., Deutsche Bank Securities&nbsp;Inc., J.P. Morgan
Securities&nbsp;LLC, MUFG Securities Americas&nbsp;Inc., RBC Capital Markets,&nbsp;LLC and Wells Fargo Securities,&nbsp;LLC, which we refer to collectively as the sales agents, under separate
equity distribution agreements (which terminate prior equity distribution agreements and related agreements with the sales agents, if any). The equity distribution agreements provide for the issuance
and sale of common stock by us either through or to the sales agents acting as sales agent or principal, respectively. We have also entered into separate master forward sale agreements, which we refer
to as forward sale agreements, with affiliates of each of the sales agents, which we refer to as the forward purchasers. In connection with each such forward sale agreement, the forward purchaser (or
its affiliate) may, at our request, borrow from third parties and sell through or to its affiliate sales agent a number of shares of our common stock equal to the number of shares of our common stock
that underlie such forward sale agreement. We refer to a sales agent, when acting as an agent for, or purchasing from, a forward purchaser (or its affiliate), as a forward seller. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;As
described in this prospectus supplement under "Use of Proceeds," the proceeds that we will receive from the sale of shares of our common stock pursuant to the equity distribution
agreements and/or forward sale agreements cannot be determined and will depend upon the number of shares sold and, with respect to forward sale transactions, whether we elect to physically settle,
cash settle, or net physically settle the forward sale transactions. Settlement of forward sale transactions will occur upon dates specified by us or, in certain circumstances, the forward purchasers,
as provided in each forward sale agreement. </FONT></P>


<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
shares of our common stock sold through the sales agents will be offered at market prices prevailing at the time of sale, at prices related to the prevailing market prices, or at
negotiated prices. If we sell shares to a sales agent as principal, we will enter into a separate terms agreement with the sales agent setting forth the terms of such transaction, and we will describe
the agreement in a separate prospectus supplement or pricing supplement. In connection with sales through or to the sales agents under the equity distribution agreements, we will pay the applicable
sales agent a commission equal to up to 2.0% of the gross sales price of all shares of our common stock sold through or to it. In connection with any forward sale transaction, the applicable sales
agent, as forward seller, will receive an effective per share commission of up to 2.0% of the volume-weighted average price per share at which the shares of common stock are sold pursuant to such
forward sale agreement. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Our
common stock is traded on the New York Stock Exchange under the symbol "AMG." On August&nbsp;15, 2016, the last reported sale price of shares of our common stock as reported on
the New York Stock Exchange was $143.88. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT
SIZE=2><B>Investing in our common stock involves risks that are described under "Risk Factors" on page&nbsp;S-2 of this
prospectus supplement and under "Risk Factors" in our Annual Report on Form&nbsp;10-K for the year ended December&nbsp;31, 2015 and our Quarterly Reports on Form&nbsp;10-Q filed
thereafter.</B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT SIZE=2><B>Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of
these
securities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.</B></FONT></P>
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<TD style="font-family:times;"><FONT SIZE=4><B>BofA Merrill Lynch</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>Barclays</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=4><B>BMO Capital Markets</B></FONT></TD>
</TR>
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<TD style="font-family:times;"><FONT SIZE=4><B>Citigroup</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>Deutsche Bank Securities</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=4><B>J.P. Morgan</B></FONT></TD>
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<TD style="font-family:times;"><FONT SIZE=4><B>MUFG</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>RBC Capital Markets</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=4><B>Wells Fargo Securities</B></FONT></TD>
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&nbsp;&nbsp;&nbsp;
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The date of this prospectus supplement is August&nbsp;16, 2016. </FONT></P>

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NAME="BG45301A_main_toc"></A> </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="bg45301_table_of_contents"> </A>
<BR></FONT><FONT SIZE=2><B>  TABLE OF CONTENTS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>
<A NAME="BG45301_TOC"></A> </FONT></P>
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<TD COLSPAN=4 ALIGN="CENTER" VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2><B>Prospectus Supplement</B></FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
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<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45301_about_this_prospectus_supplement"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>ABOUT THIS PROSPECTUS SUPPLEMENT</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45301_about_this_prospectus_supplement"><FONT SIZE=2><BR>
S-1</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
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<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45301_risk_factors"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>RISK FACTORS</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45301_risk_factors"><FONT SIZE=2>S-2</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45301_forward-looking_statements"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>FORWARD-LOOKING STATEMENTS</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45301_forward-looking_statements"><FONT SIZE=2>S-4</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
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<TD VALIGN="TOP" style="font-family:times;"><A HREF="#dc45301_use_of_proceeds"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>USE OF PROCEEDS</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#dc45301_use_of_proceeds"><FONT SIZE=2>S-5</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#dc45301_plan_of_distribution_(conflicts_of_interest)"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>PLAN OF DISTRIBUTION (CONFLICTS OF INTEREST)</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#dc45301_plan_of_distribution_(conflicts_of_interest)"><FONT SIZE=2>S-6</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
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<TD VALIGN="TOP" style="font-family:times;"><A HREF="#dc45301_legal_matters"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>LEGAL MATTERS</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#dc45301_legal_matters"><FONT SIZE=2>S-10</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD COLSPAN=4 ALIGN="CENTER" VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2><B>Prospectus</B></FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_about_this_prospectus"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>About This Prospectus</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_about_this_prospectus"><FONT SIZE=2><BR>
1</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_forward-looking_statements"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Forward-Looking Statements</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_forward-looking_statements"><FONT SIZE=2>1</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
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<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_where_you_can_find_more_information"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Where You Can Find More Information</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_where_you_can_find_more_information"><FONT SIZE=2>1</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_affiliated_managers_group,_inc."><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Affiliated Managers Group,&nbsp;Inc.&nbsp;</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_affiliated_managers_group,_inc."><FONT SIZE=2>2</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_use_of_proceeds"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Use of Proceeds</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_use_of_proceeds"><FONT SIZE=2>3</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_ratio_of_earnings_to_fixed_charges"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Ratio of Earnings to Fixed Charges</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_ratio_of_earnings_to_fixed_charges"><FONT SIZE=2>3</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_description_of_the_debt_securities"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of the Debt Securities</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_description_of_the_debt_securities"><FONT SIZE=2>3</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_description_of_common_stock"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Common Stock</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_description_of_common_stock"><FONT SIZE=2>3</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_description_of_preferred_stock"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Preferred Stock</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_description_of_preferred_stock"><FONT SIZE=2>5</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_description_of_depositary_shares"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Depositary Shares</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_description_of_depositary_shares"><FONT SIZE=2>5</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_description_of_warrants"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Warrants</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_description_of_warrants"><FONT SIZE=2>6</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_description_of_subscription_rights"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Subscription Rights</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_description_of_subscription_rights"><FONT SIZE=2>6</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#da45302_description_of_stock_purchase___des02662"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Stock Purchase Contracts and Stock Purchase Units</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#da45302_description_of_stock_purchase___des02662"><FONT SIZE=2>7</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#dc45302_plan_of_distribution"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Plan of Distribution</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#dc45302_plan_of_distribution"><FONT SIZE=2>8</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#dc45302_validity_of_securities"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Validity of Securities</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#dc45302_validity_of_securities"><FONT SIZE=2>9</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><A HREF="#dc45302_experts"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Experts</FONT></A></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><A HREF="#dc45302_experts"><FONT SIZE=2>9</FONT></A></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
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 <P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT
SIZE=2><B>You should rely only on the information incorporated by reference into or included in this prospectus supplement and the accompanying prospectus and in any
related free writing prospectus. We have not, nor have the sales agents or the forward purchasers, authorized any other person to provide you with different information. If anyone provides you with
different or inconsistent information, you should not rely on it. We are not, nor are the sales agents or the forward purchasers, making an offer to sell these securities in any jurisdiction where the
offer or sale is not permitted. You should not assume that the information in this prospectus is accurate as of any date other than the date on the front of this document. Our business, financial
condition, results of operations and prospects may have changed since such date.</B></FONT></P>

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</FONT></P>

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<P style="font-family:times;"><FONT SIZE=2><A HREF="#bg45301a_main_toc">Table of Contents</A> </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45301_about_this_prospectus_supplement"> </A>
<A NAME="toc_da45301_1"> </A>
<BR></FONT><FONT SIZE=2><B>  ABOUT THIS PROSPECTUS SUPPLEMENT    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This document is in two parts. The first is this prospectus supplement, which describes the specific terms of the common stock we are
offering and certain other matters relating to us. The second part, the accompanying prospectus, gives more general information about securities we may offer from time to time, some of which may not
apply to the common stock we are currently offering. If the description of the offering varies between this prospectus supplement and the accompanying prospectus, you should rely on the information in
this prospectus supplement. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unless
otherwise indicated or unless the context requires otherwise, all references in this prospectus supplement to "Affiliated Managers Group," "AMG," "we," "us," the "Company" and
"our" refer to Affiliated Managers Group,&nbsp;Inc. and not our Affiliates (as defined in the accompanying prospectus) or other subsidiaries. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>S-1</FONT></P>

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<P style="font-family:times;"><FONT SIZE=2><A HREF="#bg45301a_main_toc">Table of Contents</A></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45301_risk_factors"> </A>
<A NAME="toc_da45301_2"> </A>
<BR></FONT><FONT SIZE=2><B>  RISK FACTORS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT
SIZE=2><I>In addition to the other information contained elsewhere or incorporated by reference into this prospectus supplement and the accompanying prospectus, you should
carefully consider the following risk factors, as well as the "Risk Factors" section in our Annual Report on Form&nbsp;10-K for the fiscal year ended December&nbsp;31, 2015 and any similar section
in our Quarterly Reports on Form&nbsp;10-Q filed thereafter, before you decide to invest in our common stock. Some factors in these sections are forward-looking statements. For a discussion of those
statements and of other factors for investors to consider, see "Forward-Looking Statements."</I></FONT></P>

<P style="font-family:times;;margin-left:0pt;text-indent:-0pt;"><FONT SIZE=2><B><I>


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Settlement provisions contained in any forward sale agreement subject us to certain risks.  </I></B></FONT></P>


<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Each forward purchaser will have the right, in its sole discretion, to require us to physically settle any forward sale transaction
under the respective forward sale agreement upon the occurrence of certain events, including if (a)&nbsp;the forward purchaser (or its affiliate) is unable to hedge the forward purchaser's exposure
to the transactions contemplated by such forward sale agreement either because of a lack of sufficient shares of our common stock being made available for borrowing by share lenders or because any
such shares are not available at a rate that is less than a specified threshold, (b)&nbsp;on any day following the trade date of the forward sale transaction, we declare (i)&nbsp;any cash dividend
in excess of the amount provided for in the forward sale agreement or paid prior to the date set forth in the forward sale agreement or (ii)&nbsp;certain non-cash distributions, issuances or
dividends to existing holders of shares of our common stock, (c)&nbsp;on any day following the trade date of the forward sale transaction, shares of our common stock trade at a price equal to or
less than a certain threshold, (d)&nbsp;on any day following the trade date of the forward sale transaction, we announce a merger event (as defined in the forward sale agreement) or (e)&nbsp;the
forward purchaser elects to terminate the forward sale transaction as a result of an event of default, a termination event or certain additional disruption events or extraordinary events (each as set
forth in the forward sale agreement). Each forward purchaser's decision to exercise its right to require us to settle any forward sale transaction will be made irrespective of our need for capital. In
the event that we are required to settle any forward sale transaction with shares of our common stock, delivery of such shares would likely result in dilution to our earnings per share and return on
equity. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In
addition, upon certain events of bankruptcy, insolvency or reorganization relating to us, any outstanding forward sale agreement will automatically terminate without further
liability to either party (except for any liability in respect of any breach of representation or covenant by a party under any such forward sale agreement prior to the date of any such proceeding).
Following any such termination, we would not issue any shares, and we would not receive any proceeds, pursuant to such forward sale agreement. </FONT></P>


<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Except
under the circumstances described above, we have the right, in lieu of physical settlement of any forward sale transaction, to cash or net physically settle such forward sale
transaction. In the event that we elect to settle with shares of our common stock, delivery of such shares would likely result in dilution to our earnings per share and return on equity. If we elect
cash or net physical settlement of a forward sale transaction, the applicable forward purchaser (or its affiliate) will purchase shares of our common stock in secondary market transactions over a
period of time for delivery to stock lenders in order to unwind the applicable forward purchaser's hedges. If the price of our common stock at which the applicable forward purchaser (or its affiliate)
unwinds the forward purchaser's hedge is below the applicable forward sale price, the forward purchaser will pay us such difference in cash (if we cash settle) or deliver to us shares of our common
stock having a market value equal to such difference (if we net physically settle). If the price of our common stock at which the applicable forward purchaser (or its affiliate) unwinds the forward
purchaser's hedge exceeds the applicable forward sale price, we will pay the forward purchaser (or its affiliate) an amount in cash equal to such difference (if we cash settle) or we will deliver to
the forward purchaser (or its affiliate) a number of </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>S-2</FONT></P>

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<P style="font-family:times;"><FONT SIZE=2><A HREF="#bg45301a_main_toc">Table of Contents</A></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>shares
of our common stock having a market value equal to such difference (if we net physically settle). Any such difference could be significant. In addition, we would expect that the purchases of
our common stock by the forward purchaser (or its affiliate) to unwind the forward purchaser's hedges could cause the price of our common stock to increase over time, thereby increasing the number of
shares or amount of cash we owe to the forward purchaser. </FONT></P>

<P style="font-family:times;;margin-left:0pt;text-indent:-0pt;"><FONT SIZE=2><B><I>


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Share repurchase transactions and hedging activities related to derivative transactions may affect
the value of our common stock.  </I></B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Our board of directors has authorized share repurchase programs in recent periods. As of June&nbsp;30, 2016, the maximum number of
shares that may be repurchased under the outstanding program is approximately 2.1&nbsp;million. Repurchases under this program, which may include open market and private repurchase transactions
potentially including capped call or other derivative transactions, may be effected from time to time while we are not requesting sales under the equity distribution agreements. </FONT></P>


<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In
connection with executing repurchase transactions or hedging derivative transactions, we or our transaction counterparties or their respective affiliates may purchase or sell our
common stock in secondary market transactions or may enter into, modify or unwind various derivative transactions with respect to our common stock. The effect of any of these transactions and
activities on the price of our common stock will depend in part on market conditions and the structure of the capped call or other derivatives transactions and cannot be ascertained at this time, but
any of these activities could adversely affect the value of our common stock. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>S-3</FONT></P>

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<P style="font-family:times;"><FONT SIZE=2><A HREF="#bg45301a_main_toc">Table of Contents</A></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45301_forward-looking_statements"> </A>
<A NAME="toc_da45301_3"> </A>
<BR></FONT><FONT SIZE=2><B>  FORWARD-LOOKING STATEMENTS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Certain matters discussed in this prospectus supplement, the accompanying prospectus and the other documents we incorporate by
reference may constitute forward-looking statements within the meaning of Section&nbsp;27A of the Securities Act of 1933, as amended (the "Securities Act"), and Section&nbsp;21E of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"). You can identify forward-looking statements by the use of the words "outlook," "guidance," "believes," "expects," "potential," "continues,"
"may," "will," "should," "seeks," "approximately," "predicts," "projects," "intends," "plans," "estimates," "pending investments," "anticipates" or the negative version of these words or other
comparable words. These statements include, among other things, statements regarding our intent, belief or expectations with respect to:</FONT></P>

<UL>
<DL compact>
<DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> potential investments in new or our existing investment management firms, or the closing of investments that have been announced; </FONT> <FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the availability of debt and equity financing to fund these investments; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> future borrowings under our revolving credit facility; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> interest rates and hedging contracts; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the impact of new accounting policies; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> our competition and our Affiliates' competition; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> changing conditions in the financial and securities markets; and </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> general economic conditions. </FONT></DD></DL>
</UL>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
future results or outcome of the matters described in any of these statements are uncertain, and they merely reflect our current expectations and estimates. You should not rely on
forward-looking statements because they involve known and unknown risks, uncertainties and other factors, some of which are beyond our control. These risks, uncertainties and other factors may cause
our actual results, performance or achievements to be materially different from the anticipated future results, performance or achievements expressed or implied by the forward-looking statements. Some
of the factors that might cause these differences include, but are not limited to, the factors described in the "Risk Factors" section hereof or in our Annual Report on Form&nbsp;10-K for the year
ended December&nbsp;31, 2015 and our Quarterly Reports on Form&nbsp;10-Q filed thereafter as well as the following:</FONT></P>

<UL>
<DL compact>
<DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> changes in the securities or financial markets or in general economic conditions; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the availability of equity and debt financing; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> competition for acquisitions of interests in investment management firms; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the ability to close pending investments; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the investment performance and growth rates of our Affiliates and their ability to effectively market their investment strategies; and </FONT> <FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the mix of Affiliate contributions to our earnings. </FONT></DD></DL>
</UL>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT
SIZE=2><B>You should carefully review all of these factors, and you should be aware that there may be other factors that could cause such
differences.</B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We
caution you that, while forward-looking statements reflect our current estimates and beliefs, they are not guarantees of future performance. We do not undertake to update any
forward-looking statements to reflect changes in underlying assumptions or factors, new information, future events or other changes. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>S-4</FONT></P>

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<BR></FONT><FONT SIZE=2><B>  USE OF PROCEEDS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The amount of proceeds from this offering will depend upon the number of shares of our common stock sold, the market price at which
they are sold and, with respect to any forward sale transaction, the settlement method as described below. There can be no assurance that we will be able to sell any shares under or fully utilize the
equity distribution agreements or any forward sale agreement as a source of financing. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In
connection with any forward sale transaction, except under certain circumstances described in this prospectus supplement, we have the right to cash or net physically settle the
forward sale transaction, in lieu of full physical settlement. The election of cash or net physical settlement will impact any net proceeds received by us upon settlement of such forward sale
transaction and may, instead, require us to deliver cash or common stock to the forward purchaser. See "Risk Factors&#151;Settlement provisions contained in any forward sale agreement subject
us to certain risks" and "Plan of Distribution (Conflicts of Interest)." To the extent we sell any shares pursuant to a forward sale
agreement and elect full physical settlement, we expect to receive net proceeds equal to the number of such shares multiplied by the initial forward sale price per share, subject to the price
adjustment and other provisions of the forward sale agreement. The initial forward sale price per share under each forward sale transaction pursuant to a forward sale agreement will equal no less than
98.0% of the volume-weighted average price per share at which the shares to which the forward sale transaction relates are sold pursuant to the applicable equity distribution agreement. We may also
enter into a terms agreement with a forward purchaser and its affiliate sales agent providing for a forward sale transaction at an agreed upon initial forward sale price. We are not required to enter
into any forward sale transaction and, if we do, the actual proceeds will be subject to settlement of such forward sale transaction. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We
intend to use any net proceeds that we receive from sales of shares of our common stock or any net proceeds that we receive upon the settlement of any forward sale transaction for
general corporate purposes, which may include funding investments in new and existing Affiliates. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>S-5</FONT></P>

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<BR></FONT><FONT SIZE=2><B>  PLAN OF DISTRIBUTION (CONFLICTS OF INTEREST)    <BR>    </B></FONT></P>


<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We have entered into equity distribution agreements, dated as of August&nbsp;16, 2016, with the sales agents and forward purchasers
pursuant to which we may issue and sell up to $500,000,000 in the aggregate of shares of our common stock from time to time either through or to the sales agents acting as sales agent or principal,
respectively. Further, the equity distribution agreements provide that, in addition to the issuance and sale of shares of our common stock by us through or to the sales agents, we also may deliver
instructions to (or enter into a terms agreement with) any sales agent providing that such sales agent, as a forward seller, sell (or purchase) shares of our common stock borrowed by the relevant
forward purchaser (or its affiliate) in connection with a forward sale transaction with such forward purchaser. We have entered into separate master forward sale agreements, each dated as of
August&nbsp;16, 2016, with each forward purchaser providing for such forward sale transactions contemplated by the equity distribution agreements. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
sales, if any, of shares of our common stock under the equity distribution agreements through the sales agents (or affiliates, successors or assigns of the agents) will be made in
"at the market offerings" as defined in Rule&nbsp;415 of the Securities Act, including sales made directly on the New York Stock Exchange or any other trading market, the existing trading market for
shares of our common stock, or sales made to or through a market maker or through an electronic communications network at market prices prevailing at the time of sale, at prices related to the
prevailing market prices, or at negotiated
prices. In addition, we also may sell shares to the sales agents as principal at a price agreed upon at the time of sale. The sales agents will not engage in any transactions that stabilize our common
stock. The number and timing of shares sold under the program will be in our discretion. We may instruct the sales agents to sell shares from time to time or not to sell any shares. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
sales agents may resell the shares and may do so at fixed prices or variable prices. Some or all of our common stock sold under the equity distribution agreements may be sold
through: ordinary brokerage transactions and transactions in which a broker solicits purchasers; purchases by a broker-dealer and resale by the broker-dealer for its account; or a block trade in which
a broker-dealer will attempt to sell but may position or resell a portion of the block in order to facilitate the transaction. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
fees and expenses in connection with the establishment of the equity distribution program are estimated to be approximately $350,000, excluding commissions payable to the sales
agents under the equity distribution agreements. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In
connection with the sale of the common stock contemplated in this prospectus supplement, each sales agent may be deemed to be an "underwriter" within the meaning of the Securities
Act and the compensation paid to the sales agent may be deemed to be underwriting commissions or discounts. We have agreed to provide indemnification and contribution to the sales agents and the
forward purchasers (and certain affiliates of the forward purchasers) against certain civil liabilities, including liabilities under the Securities Act. The sales agents and their respective
affiliates have provided, and may in the future provide, investment banking, underwriting, trust or other advisory or commercial services to us and our subsidiaries or affiliates. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;If
a sales agent, a forward purchaser or we reasonably believe that our common stock is no longer an "actively-traded security" as defined under Rule&nbsp;101(c)(1) of
Regulation&nbsp;M under the Exchange Act, that party will promptly notify the other party or parties and sales of common stock under the applicable equity distribution agreement and any terms
agreement will be suspended until that or other exemptive provisions have been satisfied in the judgment of the sales agent, the forward purchaser and us. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
offering of common stock pursuant to the equity distribution agreements will terminate upon the earlier of (i)&nbsp;the sale of all shares of common stock subject to the equity
distribution </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>S-6</FONT></P>

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<P style="font-family:times;"><FONT SIZE=2>agreements
and (ii)&nbsp;the termination of the respective equity distribution agreement by the applicable sales agent or us. </FONT></P>

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Sales Through or To a Sales Agent  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;From time to time during the term of an equity distribution agreement, and subject to the terms and conditions set forth therein, we
may deliver instructions to a sales agent regarding its sale of shares as our agent. Upon receipt of our instructions, and subject to the terms and conditions of the applicable equity distribution
agreement, the sales agent has agreed to use its commercially reasonable efforts consistent with its normal trading and sales practices to sell the amount of shares of our common stock specified in
our instructions. We or the applicable sales agent may suspend the offering of shares of our common stock at any time upon proper notice to the other, upon which the selling period will immediately
terminate. Settlement for sales of shares of our common stock will occur through the facilities of The Depository Trust Company on the third trading day following the date on which the sales were made
unless another date shall be agreed to in writing by us and the applicable sales agent. The obligation of the sales agents under the equity distribution agreements to sell shares of our common stock
pursuant to our instructions is subject to a number of conditions, which the sales agents reserve the right to waive in their sole discretion. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Under
the terms of the equity distribution agreements, we also may sell shares to the sales agents as principal at a price agreed upon at the time of sale. If we sell shares to a sales
agent as principal, we will enter into a separate terms agreement with the sales agent setting forth the terms of such transaction, and we will describe the agreement in a separate prospectus
supplement or pricing supplement. </FONT></P>


<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We
will pay the applicable sales agent a commission equal to up to 2.0% of the gross sales price of all shares of our common stock sold through or to it, unless otherwise agreed in a
terms agreement. </FONT></P>

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Sales Through or To a Forward Seller  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;From time to time during the term of an equity distribution agreement, and subject to the terms and conditions set forth therein and
in the related forward sale agreements, we may deliver instructions requesting that the sales agents execute sales of borrowed shares of our common stock as forward sellers in connection with the
forward sale agreements. Upon receipt of our instructions, and subject to the terms and conditions of the applicable equity distribution agreement and the applicable forward sale agreement, the
forward purchaser (or its affiliate) will borrow and deliver to the applicable forward seller shares of our common stock, and such forward seller will use its commercially reasonable efforts
consistent with its normal trading and sales practices to sell such shares. We or the applicable forward seller may immediately suspend the offering of shares of our
common stock at any time upon proper notice to the other. We expect settlement between the forward sellers and buyers of such shares in the market to occur on the third trading day following each date
on which the sales are made unless another date shall be agreed to in writing by us and the applicable sales agent. The obligation of the forward sellers under the equity distribution agreements to
execute such sales of shares of our common stock pursuant to our instructions is subject to a number of conditions, which the forward sellers reserve the right to waive in their sole discretion. The
applicable forward seller will receive an effective per share commission of up to 2.0% of the volume-weighted average price per share at which the shares of common stock are sold pursuant to the
related forward sale agreement. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Settlement
of forward sale transactions will occur upon dates specified by us or, in certain circumstances, the applicable forward purchaser as provided in the forward sale agreement,
in each case, within approximately 12&nbsp;months after the date of the completion of the hedge of the forward sale transactions. The initial forward sale price per share under each forward sale
transaction will equal no </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>S-7</FONT></P>

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<P style="font-family:times;"><FONT SIZE=2>less
than 98.0% of the volume-weighted average price per share at which the shares of our common stock to which such forward sale transaction relates are sold pursuant to the applicable equity
distribution agreement. If we elect to physically settle any forward sale transaction by delivering shares of our common stock to the forward purchaser (or its affiliate), we will receive an amount
from the applicable forward purchaser (or its affiliate) equal to the initial forward sale price per share multiplied by the total number of shares we elect to settle or are deemed to settle, subject
to the price adjustment and other provisions of the forward sale agreement. The forward sale price will be subject to adjustment on a daily basis based on a floating interest rate factor (initially
equal to the federal funds rate) less a spread. If the interest rate factor is less than the spread on any day, the interest factor will result in a daily reduction of the forward sale price. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In
addition, under the terms of each equity distribution agreement, we may also enter into a terms agreement with a forward purchaser and its affiliate sales agent providing for a
forward sale transaction at an agreed upon initial forward sale price and pursuant to which the forward purchaser (or its affiliate) will borrow shares of our common stock and sell such shares through
or to such sales agent, as forward seller, in connection with such forward sale transaction under the applicable forward sale agreement. If we enter into a separate terms agreement providing for such
a forward sale transaction, we will describe the terms of such agreement, including the applicable initial forward sale price per share, in a separate prospectus supplement or pricing supplement. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Each
forward purchaser will have the right, in its sole discretion, to require us to physically settle any forward sale transaction under the respective forward sale agreement upon the
occurrence of certain events, including if (a)&nbsp;the forward purchaser (or its affiliate) is unable to hedge the forward purchaser's exposure to the transactions contemplated by such forward sale
agreement either because of a lack of sufficient shares of our common stock being made available for borrowing by share lenders or because
any such shares are not available at a rate that is less than a specified threshold, (b)&nbsp;on any day following the trade date of the forward sale transaction, we declare (i)&nbsp;any cash
dividend in excess of the amount provided for in the forward sale agreement or paid prior to the date set forth in the forward sale agreement or (ii)&nbsp;certain non-cash distributions, issuances
or dividends to existing holders of shares of our common stock, (c)&nbsp;on any day following the trade date of the forward sale transaction, shares of our common stock trade at a price equal to or
less than a certain threshold, (d)&nbsp;on any day following the trade date of the forward sale transaction, we announce a merger event (as defined in the forward sale agreement) or (e)&nbsp;the
forward purchaser elects to terminate the forward sale transaction as a result of an event of default, a termination event or certain additional disruption events or extraordinary events (each as set
forth in the forward sale agreement). Each forward purchaser's decision to exercise its right to require us to settle any forward sale transaction will be made irrespective of our need for capital. In
the event that we are required to settle any forward sale transaction with shares of our common stock, delivery of such shares would likely result in dilution to our earnings per share and return on
equity. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In
addition, upon certain events of bankruptcy, insolvency or reorganization relating to us, any outstanding forward sale agreement will automatically terminate without further
liability to either party (except for any liability in respect of any breach of representation or covenant by a party under any such forward sale agreement prior to the date of any such proceeding).
Following any such termination, we would not issue any shares, and we would not receive any proceeds, pursuant to such forward sale agreement. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Except
under the circumstances described above, we have the right, in lieu of physical settlement of any forward sale transaction, to cash or net physically settle such forward sale
transaction. In the event that we elect to settle with shares of our common stock, delivery of such shares would likely result in dilution to our earnings per share and return on equity. If we elect
cash or net physical settlement of a forward sale transaction, the applicable forward purchaser (or its affiliate) will purchase shares of our common stock in secondary market transactions over a
period of time for delivery to </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>S-8</FONT></P>

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<P style="font-family:times;"><FONT SIZE=2>stock
lenders in order to unwind the applicable forward purchaser's hedges. If the price of our common stock at which the applicable forward purchaser (or its affiliate) unwinds the forward
purchaser's hedge is below the applicable forward sale price, the forward purchaser will pay us such difference in cash (if we cash settle) or deliver to us shares of our common stock having a market
value equal to such difference (if we net physically settle). If the price of our common stock at which the applicable forward purchaser (or its affiliate) unwinds the forward purchaser's hedge
exceeds the applicable forward sale price, we will pay the forward purchaser (or its affiliate) an amount in cash equal to such difference (if we cash settle) or we will deliver to the forward
purchaser (or its affiliate) a number of shares of our common stock having a market value equal to such difference (if we net physically settle). Any such difference could be significant. In addition,
we would expect that the purchases of our common stock by the forward purchaser (or its affiliate) to unwind the forward purchaser's hedges could cause the price of our common stock to increase over
time, thereby increasing the number of shares or amount of cash we owe to the forward purchaser. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Before
the issuance of our common stock upon settlement of any forward sale transaction, such forward sale transaction will be reflected in our diluted earnings per share calculations
using the treasury stock method. Under this method, the number of shares of our common stock used in calculating diluted earnings per share is deemed to be increased by the excess, if any, of the
number of shares that would be issued upon physical settlement of the forward sale transaction over the number of shares that could be purchased by us in the market (based on the average market price
during the period) using the proceeds receivable upon settlement (based on the adjusted forward sale price at the end of the reporting period). </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Consequently,
with respect to each forward sale transaction that we enter into under the forward sale agreements, we anticipate there will be no dilutive effect on our earnings per
share except during periods when the average market price of our common stock is above the per share adjusted forward sale price of such forward sale transaction. However, if we decide to physically
or net physically settle any forward sale transaction, any delivery of our shares upon such physical or net physical settlement of the forward sale transaction would likely result in dilution to our
earnings per share and return on equity. </FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Conflicts of Interest  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The forward purchasers (or their affiliates) will receive the net proceeds of any sale of borrowed shares of our common stock pursuant
to this prospectus supplement in connection with any forward sale transaction pursuant to their respective forward sale agreements. Because affiliates of the sales agents may receive more than 5% of
the net proceeds of any offerings, the sales agents will be deemed to have a conflict of interest under FINRA Rule&nbsp;5121. As a result, the sales agents will be required to conduct the
distribution of our common stock in accordance with FINRA Rule&nbsp;5121. If the distribution is conducted in accordance with FINRA Rule&nbsp;5121, the sales agents would not be permitted to
confirm a sale to an account over which it exercises discretionary authority without first receiving specific written approval from the account holder. The appointment of a "qualified independent
underwriter" is not necessary because the shares of common stock have a "bona fide public market" (as such terms are defined in FINRA Rule&nbsp;5121). </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>S-9</FONT></P>

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<BR></FONT><FONT SIZE=2><B>  LEGAL MATTERS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Certain legal matters in connection with the offering of the common stock will be passed upon for us by Ropes&nbsp;&amp;
Gray&nbsp;LLP, Boston, Massachusetts. Certain legal matters will be passed upon for the sales agents by O'Melveny&nbsp;&amp; Myers&nbsp;LLP, New York, New York. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>S-10</FONT></P>

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</FONT> <FONT SIZE=2><B>PROSPECTUS</B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=5><B>AFFILIATED MANAGERS GROUP,&nbsp;INC.  </B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>Debt Securities<BR>
Common Stock<BR>
Preferred Stock<BR>
Depositary Shares<BR>
Warrants<BR>
Subscription Rights<BR>
Stock Purchase Contracts<BR>
Stock Purchase Units  </B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><I>

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<BR>  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The registration statement that contains this prospectus is being filed in anticipation of the expiration of the previous registration statement
filed by Affiliated Managers Group,&nbsp;Inc. ("AMG") on August&nbsp;6, 2013. </FONT></P>


<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;AMG
may offer and sell, or facilitate the resale of, securities from time to time. We will provide specific terms of these securities in supplements to this prospectus. One or more
selling security holders to be identified in the future may also offer and sell the securities listed above from time to time. You should read this prospectus and any prospectus supplements carefully
before making your investment decision. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
common stock of AMG is listed on the New York Stock Exchange under the symbol "AMG." If we decide to seek a listing of any debt securities, preferred stock, depositary shares,
warrants or other securities offered by this prospectus, the related prospectus supplement will disclose the exchange or market on which the securities will be listed, if any, or where we have made an
application for listing, if any. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This
prospectus may be used to offer and sell securities only if accompanied by a prospectus supplement for those securities. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><I>

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<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT
SIZE=3><B>Investing in these securities involves certain risks. See "Item&nbsp;1A&#151;Risk Factors" in our most recent Annual Report on
Form&nbsp;10-K incorporated by reference in this prospectus and in any subsequent Quarterly Report on Form&nbsp;10-Q and the "Risk Factors" section in the applicable prospectus supplement for a
discussion of the factors you should carefully consider before deciding to purchase these securities.</B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=3><I>

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<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The address of AMG's principal executive offices is 777 South Flagler Drive, West Palm Beach, Florida 33401 and the telephone number at the
principal executive offices is (800)&nbsp;345-1100. </FONT></P>

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<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT
SIZE=2><B>Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this
prospectus is truthful or complete. Any representation to the contrary is a criminal offense.</B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><I>

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<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>The
date of this prospectus is April&nbsp;18, 2016 </FONT></P>

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<A NAME="toc_bg45302_1"> </A>
<BR></FONT><FONT SIZE=2><B>  TABLE OF CONTENTS    <BR>    </B></FONT></P>
 <DIV style="padding:0pt;position:relative;width:80%;margin-left:10%;">
<p style="font-family:times;"></FONT></P>

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<TD WIDTH="7pt" ALIGN="RIGHT" style="font-family:times;"></TD>
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<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>About This Prospectus</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2>1</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Forward-Looking Statements</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
1</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Where You Can Find More Information</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
1</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Affiliated Managers Group,&nbsp;Inc.&nbsp;</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
2</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Use of Proceeds</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
3</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Ratio of Earnings to Fixed Charges</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
3</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of the Debt Securities</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
3</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Common Stock</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
3</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Preferred Stock</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
5</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Depositary Shares</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
5</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Warrants</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
6</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Subscription Rights</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
6</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Description of Stock Purchase Contracts and Stock Purchase Units</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
7</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Plan of Distribution</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
8</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Validity of Securities</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
9</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
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<TD VALIGN="TOP" style="font-family:times;"><p style="font-family:times;margin-top:12pt;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Experts</FONT></TD>
<TD VALIGN="TOP" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><BR>
9</FONT></TD>
<TD style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
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<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
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<BR></FONT><FONT SIZE=2><B>  ABOUT THIS PROSPECTUS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Each time we offer securities using this prospectus, we will provide the specific terms and offering prices in a supplement to this
prospectus. The prospectus supplements also may add, update or change the information contained or incorporated by reference in this prospectus and also will describe the specific manner in which we
will offer these securities. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
applicable prospectus supplement may also contain important information about United States federal income tax consequences and, in certain circumstances, consequences under other
countries' tax laws to which you may become subject if you acquire the securities being offered by that prospectus supplement. You should read carefully both this prospectus and any prospectus
supplement together with the additional information described under the heading "Where You Can Find More Information." </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We
are responsible for the information contained or incorporated by reference in this prospectus and the applicable prospectus supplement. We have not authorized any other person to
provide you with different information, and we take no responsibility for any other information that others may give you. We are not making an offer to sell these securities in any jurisdiction where
the offer or sale is not permitted. You should assume that the information appearing in this prospectus or incorporated by reference herein is accurate only as of the date on the front of this
prospectus or the respective dates of filing of the incorporated documents. Our business, financial condition, results of operations and prospects may have changed since that date. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unless
otherwise indicated or unless the context requires otherwise, all references in this prospectus to "AMG," "we," "us," the "Company" and "our" refer to Affiliated Managers
Group,&nbsp;Inc. and not our Affiliates (as defined later in this prospectus) or other subsidiaries. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_forward-looking_statements"> </A>
<A NAME="toc_da45302_2"> </A>
<BR></FONT><FONT SIZE=2><B>  FORWARD-LOOKING STATEMENTS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Certain matters discussed in this prospectus, in the documents we incorporate by reference herein and our other filings with the
Securities and Exchange Commission, or the "SEC," in our press releases and in oral statements made with the approval of an executive officer may constitute "forward-looking statements" within the
meaning of the Private Securities Litigation Reform Act of 1995. These statements include, but are not limited to, statements related to our expectations regarding the performance of our business, our
financial results, our liquidity and capital resources and other non-historical statements, and may be prefaced with words such as "outlook," "guidance," "believes," "expects," "potential,"
"continues," "may," "will," "should," "seeks," "approximately," "predicts," "projects," "intends," "plans," "estimates," "anticipates" or the negative version of these words or other comparable words.
Such statements are subject to certain risks and uncertainties, including, among others, the factors discussed under the caption "Risk Factors" in the documents incorporated by reference in this
prospectus. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;These
factors (among others) could affect our financial performance and cause actual results to differ materially from historical earnings and those presently anticipated and projected.
Forward-looking statements speak only as of the date they are made, and we will not undertake and we specifically disclaim any obligation to release publicly the result of any revisions which may be
made to any forward-looking statements to reflect events or circumstances after the date of such statements or to reflect the occurrence of events, whether or not anticipated. In that respect, we
caution readers not to place undue reliance on any such forward-looking statements. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_where_you_can_find_more_information"> </A>
<A NAME="toc_da45302_3"> </A>
<BR></FONT><FONT SIZE=2><B>  WHERE YOU CAN FIND MORE INFORMATION    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We file annual, quarterly and current reports, proxy statements and other information with the SEC. You may read and copy any materials
that we file with the SEC at its Public Reference Room, 100&nbsp;F Street, N.E., Washington, D.C. 20549. You may call the SEC at 1-800-SEC-0330 for further </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>1</FONT></P>

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<P style="font-family:times;"><FONT SIZE=2>information
on the operation of the Public Reference Room. Our SEC filings are also available to the public from the SEC's website at </FONT><FONT SIZE=2><I>www.sec.gov</I></FONT><FONT SIZE=2>. We
maintain a website at </FONT><FONT SIZE=2><I>www.amg.com</I></FONT><FONT SIZE=2>. Information on our website is not incorporated into this prospectus, any prospectus supplement or our other
securities filings, and is not part of these filings. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
SEC's rules allow us to "incorporate by reference" the information we have filed with the SEC, which means that we can disclose important information by referring you to those
documents. The information incorporated by reference is a part of this prospectus, and information that we file later with the SEC will automatically update and supersede the information included
and/or incorporated by reference in this prospectus. We incorporate by reference into this prospectus the documents listed below and any future filings made by us with the SEC under
Sections&nbsp;13(a), 13(c), 14&nbsp;or 15(d) of the Securities Exchange Act of 1934, as amended, or the "Exchange Act" (other than, in each case, any document or portion of that document that is
deemed not to be filed) after the initial filing of the registration statement that contains this prospectus and prior to the time that we sell all of the securities offered by this
prospectus:</FONT></P>

<UL>
<DL compact>
<DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> Annual Report on Form&nbsp;10-K filed on February&nbsp;25, 2016 and Form&nbsp;10-K/A filed on March&nbsp;30, 2016; </FONT> <FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> Current Report on Form&nbsp;8-K filed on February&nbsp;2, 2016; and </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> The description of our common stock contained in our Registration Statement on Form&nbsp;8-A filed with the SEC on October&nbsp;7,
1997, and any amendment or report filed for the purpose of updating such description. </FONT></DD></DL>
</UL>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;You
may obtain documents incorporated by reference into this prospectus at no cost by requesting them in writing or telephoning us at the following address: </FONT></P>

<UL>
<UL>

<P style="font-family:times;"><FONT SIZE=2>Jay
C. Horgen&#151;Chief Financial Officer and Treasurer<BR>
Affiliated Managers Group,&nbsp;Inc.<BR>
777 South Flagler Drive<BR>
West Palm Beach, Florida 33401<BR>
(800)&nbsp;345-1100 </FONT></P>

</UL>
</UL>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This
prospectus constitutes a part of a registration statement on Form&nbsp;S-3 including all amendments and exhibits, referred to herein as the "Registration Statement," that we have
filed with the SEC under the Securities Act of 1933, as amended, or the "Securities Act." This prospectus does not contain all of the information contained in the Registration Statement. We refer you
to the Registration Statement and related exhibits for further information regarding us and our securities. The Registration Statement may be inspected at the public reference facilities maintained by
the SEC at the address set forth above or from the SEC's website at </FONT><FONT SIZE=2><I>www.sec.gov</I></FONT><FONT SIZE=2>. Statements contained in this prospectus or in a document incorporated
or deemed to be incorporated by reference herein concerning the provisions of any document filed as an exhibit to the Registration Statement are not necessarily complete and, in each instance,
reference is made to the copy of such document filed as an exhibit to the Registration Statement or otherwise filed with the SEC. Each such statement is qualified in its entirety by such reference. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_affiliated_managers_group,_inc."> </A>
<A NAME="toc_da45302_4"> </A>
<BR></FONT><FONT SIZE=2><B>  AFFILIATED MANAGERS GROUP,&nbsp;INC.    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We are a global asset management company with equity investments in leading boutique investment management firms, which we refer to as
our "Affiliates." Our innovative partnership approach allows each Affiliate's management team to own significant equity in their firm and maintain operational autonomy. Our strategy is to generate
shareholder value through the growth of existing Affiliates, as well as through investments in new and additional investments in existing Affiliates. In addition, we provide centralized assistance to
our Affiliates in strategic matters, marketing, distribution, product development and operations. As of December&nbsp;31, 2015, our aggregate assets under </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>2</FONT></P>

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<P style="font-family:times;"><FONT SIZE=2>management
were $611.3&nbsp;billion (approximately $628 billion pro forma for investments which have since closed), in more than 500 investment products across a broad range of active
return-oriented strategies and distribution channels. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_use_of_proceeds"> </A>
<A NAME="toc_da45302_5"> </A>
<BR></FONT><FONT SIZE=2><B>  USE OF PROCEEDS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unless otherwise specified in connection with a particular offering of securities, the net proceeds from the sale of the securities
offered by this prospectus will be used for general corporate purposes. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_ratio_of_earnings_to_fixed_charges"> </A>
<A NAME="toc_da45302_6"> </A>
<BR></FONT><FONT SIZE=2><B>  RATIO OF EARNINGS TO FIXED CHARGES    <BR>    </B></FONT></P>


<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Our
ratio of earnings to fixed charges for each of the periods indicated is as follows: </FONT></P>
 <DIV style="padding:0pt;position:relative;width:70%;margin-left:15%;">
<p style="font-family:times;"></FONT></P>

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<TD WIDTH="" style="font-family:times;"></TD>
<TD WIDTH="12pt" style="font-family:times;"></TD>
<TD WIDTH="7pt" ALIGN="RIGHT" style="font-family:times;"></TD>
<TD WIDTH="40pt" style="font-family:times;"></TD>
<TD WIDTH="12pt" style="font-family:times;"></TD>
<TD WIDTH="7pt" ALIGN="RIGHT" style="font-family:times;"></TD>
<TD WIDTH="40pt" style="font-family:times;"></TD>
<TD WIDTH="12pt" style="font-family:times;"></TD>
<TD WIDTH="7pt" ALIGN="RIGHT" style="font-family:times;"></TD>
<TD WIDTH="25pt" style="font-family:times;"></TD>
<TD WIDTH="12pt" style="font-family:times;"></TD>
<TD WIDTH="7pt" ALIGN="RIGHT" style="font-family:times;"></TD>
<TD WIDTH="25pt" style="font-family:times;"></TD>
<TD WIDTH="12pt" style="font-family:times;"></TD>
<TD WIDTH="7pt" ALIGN="RIGHT" style="font-family:times;"></TD>
<TD WIDTH="25pt" style="font-family:times;"></TD>
<TD WIDTH="12pt" style="font-family:times;"></TD>
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<TR VALIGN="BOTTOM">
<TH ALIGN="LEFT" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT><BR></TH>
<TH style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT></TH>
<TH COLSPAN=14 ALIGN="CENTER" style="font-family:times;border-bottom:solid #000000 1.0pt;"><FONT SIZE=1><B>Year Ended December&nbsp;31, </B></FONT></TH>
<TH style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT></TH>
</TR>
<TR VALIGN="BOTTOM">
<TH ALIGN="LEFT" style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT><BR></TH>
<TH style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT></TH>
<TH COLSPAN=2 ALIGN="CENTER" style="font-family:times;border-bottom:solid #000000 1.0pt;"><FONT SIZE=1><B>2015 </B></FONT></TH>
<TH style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT></TH>
<TH COLSPAN=2 ALIGN="CENTER" style="font-family:times;border-bottom:solid #000000 1.0pt;"><FONT SIZE=1><B>2014 </B></FONT></TH>
<TH style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT></TH>
<TH COLSPAN=2 ALIGN="CENTER" style="font-family:times;border-bottom:solid #000000 1.0pt;"><FONT SIZE=1><B>2013 </B></FONT></TH>
<TH style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT></TH>
<TH COLSPAN=2 ALIGN="CENTER" style="font-family:times;border-bottom:solid #000000 1.0pt;"><FONT SIZE=1><B>2012 </B></FONT></TH>
<TH style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT></TH>
<TH COLSPAN=2 ALIGN="CENTER" style="font-family:times;border-bottom:solid #000000 1.0pt;"><FONT SIZE=1><B>2011 </B></FONT></TH>
<TH style="font-family:times;"><FONT SIZE=1>&nbsp;</FONT></TH>
</TR>
<TR BGCOLOR="#CCEEFF" VALIGN="TOP">
<TD VALIGN="BOTTOM" style="font-family:times;"><p style="font-family:times;margin-left:10pt;text-indent:-10pt;"><FONT SIZE=2> </FONT><FONT SIZE=2>Ratio</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>11.4x</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>10.4x</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>7.7x</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>5.3x</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>5.5x</FONT></TD>
<TD VALIGN="BOTTOM" style="font-family:times;"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
</TABLE></DIV>
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 </DIV>
 <P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;For
the purpose of computing the ratios of earnings to fixed charges, earnings consists of pre-tax income from continuing operations (before adjustment for non-controlling interests in
consolidated subsidiaries) plus fixed charges and as adjusted for distributed income of equity method investees. Fixed charges consists of our reported interest expense (including imputed interest
expense but excluding contingent payment obligation adjustments) plus the portion of rental expense deemed to represent interest expense. For the purposes of these calculations, pre-tax income from
continuing operations for the years ended December&nbsp;31, 2011 and December&nbsp;31, 2012 exclude the effects of reductions in the carrying value of an indefinite-lived intangible asset and
contingent payment obligation adjustments. Had these amounts not been excluded, the ratios of earnings to fixed charges for the years ended December&nbsp;31, 2011 and December&nbsp;31, 2012 would
have been 5.4x and 4.9x, respectively. Pre-tax income from continuing operations for the years ended December&nbsp;31, 2013 and December&nbsp;31, 2015 exclude the effects of contingent payment
obligation adjustments. Had these amounts not been excluded, the ratios of earnings to fixed charges for the years ended December&nbsp;31, 2013 and December 31,&nbsp;2015 would have been 7.6x and
11.9x, respectively. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;For
each of the years ended December&nbsp;31, 2015, 2014, 2013, 2012 and 2011, there were no outstanding shares of preferred stock of the Company. Therefore, the ratio of earnings to
combined fixed charges and preferred stock dividends is not different from the ratio of earnings to fixed charges for those periods. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_description_of_the_debt_securities"> </A>
<A NAME="toc_da45302_7"> </A>
<BR></FONT><FONT SIZE=2><B>  DESCRIPTION OF THE DEBT SECURITIES    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We may offer debt securities, which may be senior debt securities or subordinated debt securities and may be convertible or
non-convertible. We will issue debt securities offered by this prospectus and any accompanying prospectus supplement under an indenture to be entered into between us and the trustee identified in the
applicable prospectus supplement. The terms of the debt securities will include those described in the applicable prospectus supplement and those stated in the indenture and those made part of the
indenture by reference to the Trust Indenture Act. We have included a copy of the form of indenture as an exhibit to this Registration Statement. The indenture will be subject to and governed by the
terms of the Trust Indenture Act. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_description_of_common_stock"> </A>
<A NAME="toc_da45302_8"> </A>
<BR></FONT><FONT SIZE=2><B>  DESCRIPTION OF COMMON STOCK    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following is a description of the material terms and provisions of our common stock. It may not contain all the information that is
important to you. Therefore, you should read our charter and by-laws for additional information related to our common stock. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>3</FONT></P>

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General  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Under our charter, we currently have authority to issue up to 150,000,000 shares of common stock, par value $0.01 per share, and up to
3,000,000 shares of Class&nbsp;B non-voting common stock, par value $0.01 per share. Under Delaware law, stockholders generally are not responsible for our debts or obligations. As of
December&nbsp;31, 2015, we had 53,876,232 shares of common stock outstanding and an additional 2,004,319 shares of common stock were held in the Company's treasury, and there were no shares of
Class&nbsp;B non-voting common stock issued and outstanding. All shares of common stock will, when issued, be duly authorized, fully paid and nonassessable. Our common stock is listed on the New
York Stock Exchange under the symbol "AMG." </FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Dividends  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Subject to preferential rights of any other class or series of stock, holders of common stock and Class&nbsp;B non-voting common
stock may receive dividends out of assets that we can legally use to pay dividends, when, as and if they are declared by our board of directors, with each share of common stock and each share of
Class&nbsp;B non-voting common stock sharing equally in such dividends (with each share of Class&nbsp;B non-voting common stock being equal to the number of shares of common stock into which it
would then be convertible). If dividends are declared that are payable in shares of common stock or shares of Class&nbsp;B non-voting common stock, such dividends will be declared payable at the
same rate in both classes of stock and the dividends payable in shares of common stock will be payable to the holders of shares of common stock, and the dividends payable in shares of Class&nbsp;B
non-voting common stock will be payable to the holders of shares of Class&nbsp;B non-voting common stock. </FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Voting Rights  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Holders of common stock will have the exclusive power to vote on all matters presented to our stockholders, including the election of
directors, except as otherwise required by Delaware law or as provided with respect to any other class or series of stock. Holders of common stock are entitled to one vote per share. There is no
cumulative voting in the election of our directors, which means that, subject to any rights to elect directors that are granted to the holders of any class or series of preferred stock, a majority of
the votes cast at a meeting of stockholders at which a quorum is present is required to elect a director in an uncontested election. </FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Liquidation/Dissolution Rights  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Subject to the preferential rights of any other class or series of stock, holders of shares of our common stock and Class&nbsp;B
non-voting common stock shall be entitled to share ratably in the remaining assets available for distribution in the event we are liquidated, dissolved or our affairs are wound up after we pay or make
adequate provision for all of our known debts and liabilities (with each share of Class&nbsp;B non-voting common stock being equal to the number of shares of common stock into which it would then be
convertible). </FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Other Rights  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Subject to the preferential rights of any other class or series of stock, all shares of common stock have equal dividend, distribution,
liquidation and other rights, and have no preference, appraisal or exchange rights, except for any appraisal rights provided by Delaware law. Furthermore, holders of shares of our common stock have no
conversion, sinking fund or redemption rights, or preemptive rights to subscribe for any of our securities, other than the conversion rights afforded to the holders of our Class&nbsp;B non-voting
common stock that are described below. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Under
Delaware law, a corporation generally cannot dissolve, amend its charter, merge, sell all or substantially all of its assets, engage in a share exchange or engage in similar
transactions outside the ordinary course of business unless approved by the affirmative vote of stockholders holding a majority </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>4</FONT></P>

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<P style="font-family:times;"><FONT SIZE=2>of
the shares entitled to vote on the matter, unless a different percentage is set forth in the corporation's charter, which percentage will not in any event be less than a majority of all of the
shares entitled to vote on such matter. Our charter provides that whenever any vote of the holders of voting stock is required to amend or repeal any provision of the charter, then in addition to any
other vote of the holders of voting stock that is required by the charter or by-laws, the affirmative vote of the holders of a majority of our outstanding shares of stock entitled to vote on such
amendment or repeal, voting together as a single class, is required. However, with respect to the amendment or repeal of any of the provisions of our charter relating to stockholder action without an
annual or special meeting, the election, term or removal of directors, vacancies on the board of directors, or the limitation of liability of directors, the affirmative vote of the holders of at least
eighty percent (80%) of our outstanding shares of stock entitled to vote on such amendment or repeal, voting together as a single class, will be required. </FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Rights of Class&nbsp;B Non-Voting Common Stock  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The holders of our Class&nbsp;B non-voting common stock generally have the same rights and privileges as holders of our common stock,
except that holders of Class&nbsp;B non-voting common stock do not have any voting rights other than those which may be provided under our charter or applicable law. Each share of Class&nbsp;B
non-voting common stock is convertible, at the option of the
holder, into one share of common stock; provided, that such conversion is not inconsistent with any regulation, rule or other requirement of any governmental authority applicable to the holder. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;To
the extent the holders of Class&nbsp;B non-voting common stock are entitled to vote under our charter or applicable law, such holders shall vote together as a single class with the
holders of common stock, except as required by law. </FONT></P>


<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Transfer Agent  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The transfer agent and registrar for our common stock is American Stock Transfer&nbsp;&amp; Trust Company. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_description_of_preferred_stock"> </A>
<A NAME="toc_da45302_9"> </A>
<BR></FONT><FONT SIZE=2><B>  DESCRIPTION OF PREFERRED STOCK    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Under AMG's charter, the board of directors of AMG is authorized to issue up to 5,000,000 shares of preferred stock, par value $0.01
per share, in one or more series, and to establish from time to time a series of preferred stock with terms as it may specify in a certificate of designations which will be filed as an exhibit to a
document incorporated by reference in the Registration Statement of which this prospectus forms&nbsp;a part. A description of the terms of preferred stock so created will be contained in a
prospectus supplement related to any offering of such securities. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_description_of_depositary_shares"> </A>
<A NAME="toc_da45302_10"> </A>
<BR></FONT><FONT SIZE=2><B>  DESCRIPTION OF DEPOSITARY SHARES    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;AMG may, at its option, elect to offer fractional shares of preferred stock, rather than whole shares of preferred stock. In such
event, AMG will issue receipts for depositary shares, each of which will represent a fraction of a share of a particular series of preferred stock. The shares of any series of preferred stock
represented by depositary shares will be deposited under a deposit agreement between AMG and a bank or trust company selected by AMG, as preferred stock depositary. Unless otherwise provided in the
applicable prospectus supplement, each owner of a depositary share will be entitled to all the rights and preferences of the underlying preferred stock, including dividend, voting, redemption,
conversion and liquidation rights, if any, in proportion to the applicable fraction of a share of preferred stock represented by such depositary share. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
form of deposit agreement, including the form of depositary receipt, will be established at the time of the offering of any depositary shares and will be described in the applicable
prospectus supplement related to any offering of such securities. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>5</FONT></P>

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<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_description_of_warrants"> </A>
<A NAME="toc_da45302_11"> </A>
<BR></FONT><FONT SIZE=2><B>  DESCRIPTION OF WARRANTS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;AMG may offer warrants pursuant to which a holder will be entitled to purchase debt securities, preferred stock, common stock or other
securities. Warrants may be issued independently or together with any securities and may be attached to or separate from those securities. Warrants will be issued under one or more warrant agreements
to be entered into between AMG and a bank or trust company, as warrant agent. Except as otherwise stated in a prospectus supplement, the warrant agent will act solely as the agent of AMG under the
applicable warrant agreement and will not assume any obligation or relationship of agency or trust for or with any owners of warrants. A copy of the form of warrant agreement, including the form of
warrant certificate, will be filed as an exhibit to a document incorporated by reference in the Registration Statement of which this prospectus forms&nbsp;a part. You should read the more detailed
provisions of the warrant agreement and the warrant certificate for provisions that may be important to you. </FONT></P>


<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
particular terms of each issue of warrants, the warrant agreement relating to the warrants and the warrant certificates representing warrants will be described in the applicable
prospectus supplement, including, as applicable:</FONT></P>

<UL>
<DL compact>
<DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the title of the warrants; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the offering price of the warrants; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the aggregate number of warrants and the aggregate number of securities that may be purchased upon exercise of the warrants; </FONT> <FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the designation, number and terms of the debt securities, preferred stock, common stock or other securities purchasable upon exercise
of the warrants and procedures by which those numbers may be adjusted; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the currency or currency units in which the offering price and the exercise price are payable; </FONT> <FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the designation and terms of the securities, if any, with which the warrants are issued, and the number of warrants issued with each
security; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the date, if any, on and after which, if the warrants are issued as a unit with another security, the warrants and the related
security will be separately transferable; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the minimum or maximum number of warrants that may be exercised at any one time; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the date on which the right to exercise warrants will commence and the date on which the right will expire; </FONT> <FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> a discussion of United States federal income tax or other considerations applicable to the warrants; </FONT> <FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> anti-dilution provisions of the warrants, if any; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> redemption or call provisions, if any, applicable to the warrants; and </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> any additional terms of the warrants, including terms, procedures and limitations relating to the exchange and exercise of the
warrants. </FONT></DD></DL>
</UL>
<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_description_of_subscription_rights"> </A>
<A NAME="toc_da45302_12"> </A>
<BR></FONT><FONT SIZE=2><B>  DESCRIPTION OF SUBSCRIPTION RIGHTS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We may issue subscription rights to purchase debt securities, preferred stock, common stock or other securities. These subscription
rights may be issued independently or together with any other security offered hereby and may or may not be transferable by the stockholder receiving the subscription rights in such offering. In
connection with any offering of subscription rights, we may enter into a standby arrangement with one or more underwriters or other purchasers pursuant to which the </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>6</FONT></P>

<HR NOSHADE>
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<P style="font-family:times;"><FONT SIZE=2>underwriters
or other purchasers may be required to purchase any securities remaining unsubscribed for after such offering. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
applicable prospectus supplement will describe the specific terms of any offering of subscription rights for which this prospectus is being delivered, including the
following:</FONT></P>

<UL>
<DL compact>
<DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the price, if any, for the subscription rights; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the exercise price payable for each share of debt securities, preferred stock, common stock or other securities upon the exercise of
the subscription rights; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the number of subscription rights issued to each stockholder; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the number and terms of the shares of debt securities, preferred stock, common stock or other securities which may be purchased per
each subscription right; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the extent to which the subscription rights are transferable; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> any additional terms of the subscription rights, including terms, procedures and limitations relating to the exchange and exercise of
the subscription rights; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the date on which the right to exercise the subscription rights will commence and the date on which the subscription rights will
expire; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the extent to which the subscription rights may include an over-subscription privilege with respect to unsubscribed securities; and </FONT> <FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> if applicable, the material terms of any standby underwriting or purchase arrangement entered into by us in connection with the
offering of subscription rights. </FONT></DD></DL>
</UL>
<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="da45302_description_of_stock_purchase___des02662"> </A>
<A NAME="toc_da45302_13"> </A>
<BR></FONT><FONT SIZE=2><B>  DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;AMG may issue stock purchase contracts, including contracts obligating holders to purchase from or sell to AMG, and AMG to sell to or
purchase from the holders, a specified or varying number of shares of common stock, shares of preferred stock or depositary shares at a future date or dates. The consideration per share of common
stock, share of preferred stock or depositary share and the number of shares of each may be fixed at the time the stock purchase contracts are issued or may be determined by reference to a specific
formula set forth in the stock purchase contracts. Stock purchase contracts may be issued separately or as part of units, often known as stock purchase units, consisting of a stock purchase contract
and any combination of:</FONT></P>

<UL>
<DL compact>
<DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> debt securities, </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> debt obligations of third parties, including U.S. Treasury securities, or </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> any other securities described in the applicable prospectus supplement, </FONT></DD></DL>
</UL>

<P style="font-family:times;"><FONT SIZE=2>which
may secure the holders' obligations to purchase or to sell, as the case may be, the common stock, preferred stock or depositary shares under the stock purchase contracts. The stock purchase
contracts may require AMG to make periodic payments to the holders of the stock purchase units or vice versa, and these payments may be unsecured or prefunded on some basis. The stock purchase
contracts may require holders to secure their obligations under those contracts in a specified manner. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
applicable prospectus supplement will describe the terms of the stock purchase contracts and stock purchase units, including, if applicable, collateral or depositary arrangements. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>7</FONT></P>

<HR NOSHADE>
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</FONT></P>

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<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="dc45302_plan_of_distribution"> </A>
<A NAME="toc_dc45302_1"> </A>
<BR></FONT><FONT SIZE=2><B>  PLAN OF DISTRIBUTION    <BR>    </B></FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


<!-- COMMAND=STYLE_ADDED,"margin-left:10.0pt;text-indent:-10.0pt;" -->


General  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The securities may be sold:</FONT></P>

<UL>
<DL compact>
<DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> to or through underwriting syndicates represented by managing underwriters; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> to or through one or more underwriters without a syndicate; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> through dealers or agents; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> to investors directly in negotiated sales or in competitively bid transactions; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> in "at the market offerings," within the meaning of Rule&nbsp;415(a)(4) of the Securities Act, to or through a market maker or into
an existing trading market or an exchange or otherwise; or </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> through a combination of these methods. </FONT></DD></DL>
</UL>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
prospectus supplement for each series of securities we sell will describe, to the extent required, information with respect to that offering,
including:</FONT></P>

<UL>
<DL compact>
<DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the name or names of any underwriters and the respective amounts underwritten; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> the purchase price and the proceeds to us from that sale; </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> any underwriting discounts and other items constituting underwriters' compensation; </FONT> <FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> any initial public offering price and any discounts or concessions allowed or reallowed or paid to dealers; </FONT> <FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> any securities exchanges on which the securities may be listed; and </FONT><FONT SIZE=2>
<BR><BR></FONT></DD><DT style='font-family:times;margin-bottom:-11pt;'><FONT SIZE=2>&#149;</FONT></DT><DD style="font-family:times;"><FONT SIZE=2> any material relationships with the underwriters. </FONT></DD></DL>
</UL>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Underwriters  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;If underwriters are used in the sale, we will execute an underwriting agreement with those underwriters relating to the securities that
we will offer. Unless otherwise set forth in the applicable prospectus supplement, the obligations of the underwriters to purchase these securities will be subject to conditions and the underwriters
will be obligated to purchase all of these securities if any are purchased. </FONT></P>


<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
securities subject to the underwriting agreement will be acquired by the underwriters for their own account and may be resold by them from time to time in one or more transactions,
including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. Underwriters may be deemed to have received compensation from us in the form of
underwriting discounts or commissions and may also receive commissions from the purchasers of these securities for whom they may act as agent. Underwriters may sell these securities to or through
dealers. These dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters and/or commissions from the purchasers for whom they may act as agent. Any
initial public offering price and any discounts or concessions allowed or reallowed or paid to dealers may be changed from time to time. </FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Agents  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We may also sell any of the securities through agents designated by us from time to time. We will name any agent involved in the offer
or sale of these securities and will list commissions payable by us to these agents in the applicable prospectus supplement. These agents will be acting on a best efforts </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>8</FONT></P>

<HR NOSHADE>
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<A NAME="page_dc45302_1_9"> </A>

<P style="font-family:times;"><FONT SIZE=2>basis
to solicit purchases for the period of their appointment, unless we state otherwise in the applicable prospectus supplement. </FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Direct Sales  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We may sell any of the securities directly to purchasers. In this case, we will not engage underwriters or agents in the offer and sale
of the applicable securities. </FONT></P>


<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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Indemnification  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We may indemnify underwriters, dealers or agents who participate in the distribution of securities against certain liabilities,
including liabilities under the Securities Act, and agree to contribute to payments which these underwriters, dealers or agents may be required to make. </FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


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No Assurance of Liquidity  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Any securities, other than our common stock, may be new issues of securities with no established trading market. Any underwriters that
purchase securities from us may make a market in these securities. The underwriters will not be obligated, however, to make a market and may discontinue market-making at any time without notice to
holders of the securities. We cannot assure you that there will be liquidity in the trading market for any securities of any series. </FONT></P>

<P style="font-family:times;;margin-left:10.0pt;text-indent:-10.0pt;"><FONT SIZE=2><B>


<!-- COMMAND=STYLE_ADDED,"margin-left:10.0pt;text-indent:-10.0pt;" -->


Secondary Sales  </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;If any securities are sold pursuant to this prospectus by any persons other than us, we will, in a prospectus supplement, name the
selling security holder and provide the information required under the Securities Act, including the name of the selling security holder, the security or securities to be offered and sold, and
information about any underwriters or agents, including any commissions to be paid. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="dc45302_validity_of_securities"> </A>
<A NAME="toc_dc45302_2"> </A>
<BR></FONT><FONT SIZE=2><B>  VALIDITY OF SECURITIES    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unless the applicable prospectus supplement indicates otherwise, certain matters relating to the validity of the securities will be
passed upon on behalf of AMG by Ropes&nbsp;&amp; Gray&nbsp;LLP, Boston, Massachusetts. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="dc45302_experts"> </A>
<A NAME="toc_dc45302_3"> </A>
<BR></FONT><FONT SIZE=2><B>  EXPERTS    <BR>    </B></FONT></P>

<P style="font-family:times;"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The financial statements and management's assessment of the effectiveness of internal control over financial reporting (which is
included in Management's Report on Internal Control over Financial Reporting) incorporated in this Prospectus by reference to the Annual Report on Form&nbsp;10-K, as amended, for the year ended
December&nbsp;31, 2015 have been so incorporated in reliance on the reports of PricewaterhouseCoopers&nbsp;LLP, an independent registered public accounting firm, given on the authority of said
firm as experts in auditing and accounting. </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2>9</FONT></P>

<HR NOSHADE>
<P style='font-family:times;page-break-before:always'></p>
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</FONT> <FONT SIZE=2><A HREF="#bg45301a_main_toc">Table of Contents</A> </FONT></P>

<P style="font-family:times;"><FONT SIZE=1>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></P>

<P style="font-family:times;"><FONT SIZE=1>&nbsp;<BR></FONT></P>


<P style="font-family:times;"><FONT SIZE=1><div
style="width:100%;border-top:solid #000000 3.0pt;padding:0in 0in 0in 0in;font-size:3.0pt;"></div>
<div style="width:100%;border-top:solid #000000 1.0pt;padding:0in 0in 0in 0in;font-size:4.0pt;"></div> </FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=5><B>AFFILIATED MANAGERS GROUP,&nbsp;INC.  </B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=5><B>
<IMG SRC="g560721.jpg" ALT="LOGO" WIDTH="127" HEIGHT="115">
  </B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>Up to $500,000,000<BR>
Common Stock  </B></FONT></P>
 <DIV style="padding:0pt;position:relative;width:54%;margin-left:10%;">
<p style="font-family:times;"></FONT></P>

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<TD WIDTH="4%" style="font-family:times;"></TD>
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<TD WIDTH="4%" style="font-family:times;"></TD>
<TD WIDTH="180pt" style="font-family:times;"></TD>
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<TR VALIGN="BOTTOM">
<TD style="font-family:times;"><FONT SIZE=4><B>BofA Merrill Lynch</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>Barclays</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=4><B>BMO Capital Markets</B></FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD style="font-family:times;"><FONT SIZE=4><B>Citigroup</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>Deutsche Bank Securities</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=4><B>J.P. Morgan</B></FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD style="font-family:times;"><FONT SIZE=4><B>MUFG</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="CENTER" style="font-family:times;"><FONT SIZE=4><B>RBC Capital Markets</B></FONT></TD>
<TD style="font-family:times;"><FONT SIZE=4>&nbsp;</FONT></TD>
<TD ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=4><B>Wells Fargo Securities</B></FONT></TD>
</TR>
</TABLE></DIV>
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 </DIV>
 <P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><B>Prospectus Supplement<BR>
August&nbsp;16, 2016  </B></FONT></P>
 <p style="font-family:times;line-height:1pt;margin-left:18pt;"><font> </FONT> <FONT SIZE=2>
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&nbsp;&nbsp;&nbsp;
</font></p>
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<div style="width:100%;border-top:solid #000000 3.0pt;padding:0in 0in 0in 0in;font-size:4.0pt;"></div> </FONT></P>

<HR NOSHADE>
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end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
