Barbara Trebbi - 10 Feb 2026 Form 4 Insider Report for Acadian Asset Management Inc. (AAMI)

Role: Director
Signature: /s/ Richard J. Hart, By POA for Barbara Trebbi
Issuer symbol: AAMI
Transactions as of: 10 Feb 2026
Net transactions value: -$496,329
Form type: 4
Filing time: 12 Feb 2026, 18:10:02 UTC
Previous filing: 15 May 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Trebbi Barbara	Director	C/O ACADIAN ASSET MANAGEMENT INC., 200 STATE STREET, SUITE 601A, BOSTON	/s/ Richard J. Hart, By POA for Barbara Trebbi	12 Feb 2026	0001730619

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AAMI	Common Stock	Sale	$496,329	-9,691	-21%	$51.22	35,771	10 Feb 2026	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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.

Content

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.