Company: MGRE
Filing Date: 2025-02-28
Form Type: S-3ASR
Source: 0001193125-25-042543
Chunk: 10

Company: AFFILIATED MANAGERS GROUP, INC.
Filing Date: 2025-02-28
Form: S-3ASR
Chunk 10
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 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.

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.

11

DESCRIPTION OF WARRANTS 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 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. 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:

| • |     | the title of the warrants; |

| • |     | the offering price of the warrants; |

| • |     | the aggregate number of warrants and the aggregate number of securities that may be purchased upon exercise of 
 the warrants;                                                                                                  |

| • |     | 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;              |

| • |     | the currency or currency units in which the offering price and the exercise price are payable; |

| • |     | the designation and terms of the securities, if any, with which the warrants are issued, and