Director sells 9,691 Acadian Asset Management shares

Acadian Asset Management Inc. director Barbara Trebbi reported an open-market sale of common stock.

Rhea-AI Filing Summary

Acadian Asset Management Inc. director Barbara Trebbi reported an open-market sale of common stock. On February 10, 2026, she sold 9,691 shares at a weighted average price of $51.2155 per share, in multiple trades between $50.92 and $51.67.

Following this transaction, Trebbi directly beneficially owned 35,771 shares of Acadian Asset Management Inc. common stock.

Insider Trade Summary

Net Seller: 9,691 shares

Net Sell 1 txn

Insider Trebbi Barbara

Role Director

Sold 9,691 shs ($496K)

Type	Security	Shares	Price	Value
Sale	Common Stock	9,691	$51.2155	$496K

Holdings After Transaction: Common Stock — 35,771 shares (Direct)

Footnotes (1)

1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $50.92 to $51.67, inclusive. The reporting person undertakes to provide to Acadian Asset Management Inc., any securityholder of Acadian Asset Management Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

FAQ

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What insider transaction did Acadian Asset Management (AAMI) disclose?

Acadian Asset Management (AAMI) disclosed a director share sale. Director Barbara Trebbi sold 9,691 shares of common stock in an open-market transaction on February 10, 2026, as reported in a Form 4 filing.

How many Acadian Asset Management (AAMI) shares did the director sell and at what price?

Director Barbara Trebbi sold 9,691 AAMI shares. The weighted average sale price was $51.2155 per share, with individual trades executed in a price range from $50.92 to $51.67.

How many Acadian Asset Management (AAMI) shares does the director own after the sale?

After the sale, the director holds 35,771 AAMI shares. The Form 4 states that Barbara Trebbi beneficially owned 35,771 shares of Acadian Asset Management Inc. common stock directly following the February 10, 2026 transaction.

What type of transaction was reported for Acadian Asset Management (AAMI)?

The filing reports an open-market sale of common stock. The Form 4 uses transaction code “S” and describes the activity as a sale in an open market or private transaction by director Barbara Trebbi.

Who is the reporting person in this Acadian Asset Management (AAMI) Form 4?

The reporting person is director Barbara Trebbi. The Form 4 identifies her relationship to Acadian Asset Management Inc. as a director and shows she directly owns the reported common stock position.

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Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 02/12/2026 - 06:10 PM Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Trebbi Barbara

(Last) (First) (Middle)

C/O ACADIAN ASSET MANAGEMENT INC.

200 STATE STREET, SUITE 601A

(Street)

BOSTON MA 02109

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Acadian Asset Management Inc. [ AAMI ]

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)
02/10/2026

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	02/10/2026		S		9,691	D	$51.2155(1)	35,771	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

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $50.92 to $51.67, inclusive. The reporting person undertakes to provide to Acadian Asset Management Inc., any securityholder of Acadian Asset Management Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

Remarks:

	/s/ Richard J. Hart, By POA for Barbara Trebbi	02/12/2026
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.