AMG (AMG) director reports stock unit vesting and new equity awards

Rhea-AI Filing Summary

AFFILIATED MANAGERS GROUP, INC. director Ryan David Christopher reported equity-based compensation activity. He exercised previously awarded stock units for 867 shares of common stock at a reported price of $0.0000 per share, bringing his directly held common stock to 4,494 shares.

He also acquired 867 stock units through this exercise, increasing his directly held stock units to 3,850, and received a new grant of 335 stock units. The filing notes these awards vest over 2023–2027, and that the 335 newly granted stock units vest in full on March 5, 2027, with each unit representing one share of common stock upon vesting.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Ryan David Christopher

(Last) (First) (Middle)

C/O AFFILIATED MANAGERS GROUP, INC.

777 SOUTH FLAGLER DRIVE

(Street)

WEST PALM BEACH FL 33401

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
AFFILIATED MANAGERS GROUP, INC. [ AMG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/05/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/05/2026		M		867	A	$0(1)	4,494	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Units	(1)	03/05/2026		M			867	(1)	(1)	Common Stock	867	$0	3,850(2)	D
Stock Units	(3)	03/05/2026		A		335		(3)	(3)	Common Stock	335	$0	335	D

Explanation of Responses:

1. Reflects the vesting of previously reported awards. Awards vest 2023-2027.

2. Inclusive of previously reported deferred stock units.

3. Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in full on March 5, 2027.

	/s/ Kavita Padiyar, Attorney-in-Fact	03/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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FAQ

What insider transactions did AMG director Ryan David Christopher report?

He reported acquiring equity through compensation-related transactions. This included exercising 867 stock units into common stock and receiving a new grant of 335 stock units, all held directly, with resulting balances disclosed for both common shares and stock units.

How many AMG common shares does Ryan David Christopher hold after these Form 4 transactions?

After the reported transactions, he directly holds 4,494 shares of AMG common stock. These shares result from the exercise of 867 stock units at a reported price of $0.0000 per share, combined with his previously reported directly held common shares.

What are the stock units reported by AMG director Ryan David Christopher on this Form 4?

The stock units are equity awards that each represent a right to receive one share of AMG common stock upon vesting. Footnotes state that the units vest over 2023–2027, with the newly granted 335 stock units vesting in full on March 5, 2027.

How many stock units does Ryan David Christopher hold in AMG after the filing?

Following these transactions, he directly holds 3,850 stock units plus a separate new grant of 335 stock units. The filing notes that these figures are inclusive of previously reported deferred stock units, reflecting his accumulated equity-based awards.

When do the AMG stock unit awards reported by Ryan David Christopher vest?

The filing notes that the awards vest from 2023 through 2027. It also specifies that the 335 newly granted stock units vest in full on March 5, 2027, at which point each unit entitles him to one share of common stock.

Are the AMG transactions by Ryan David Christopher open-market buys or compensation-related?

They are compensation-related transactions, not open-market purchases. The Form 4 shows an exercise or conversion of previously granted stock units and a new grant or award of additional stock units, all reported at a price of $0.0000 per share.