Equity moves at Acadian Asset Management Inc. (AAMI) as officer reports RSU grants

Rhea-AI Filing Summary

Acadian Asset Management Inc. executive Christina Wiater reported multiple equity compensation transactions. On February 13, 2026, she received 5,407 restricted stock units (RSUs), each representing one share of common stock, vesting in three equal annual installments through February 13, 2029.

Previously granted RSUs vested and were converted to common stock on February 14 and 15, 2026, adding 4,006 and 5,180 common shares, respectively, at no cash exercise price. To cover tax obligations, the company withheld 1,176 and 1,521 common shares at $51.85 per share, reported as tax-withholding dispositions rather than open-market sales.

After these transactions, Wiater directly held 25,614 shares of common stock and 26,432 RSUs.

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^*

Wiater Christina

(Last) (First) (Middle)

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)

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

3. Date of Earliest Transaction (Month/Day/Year)
02/13/2026

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	02/14/2026		M		4,006	A	$0	23,131	D
Common Stock	02/14/2026		F		1,176	D	$51.85	21,955	D
Common Stock	02/15/2026		M		5,180	A	$0	27,135	D
Common Stock	02/15/2026		F		1,521	D	$51.85	25,614	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
Restricted Stock Units	$0(1)	02/13/2026		A		5,407		(2)	(2)	Common Stock	5,407	$0	26,432	D
Restricted Stock Units	$0(1)	02/14/2026		M			4,006	(3)	(3)	Common Stock	4,006	$0	22,426	D
Restricted Stock Units	$0	02/15/2026		M			5,180	(4)	(4)	Common Stock	5,180	$0	17,246	D

Explanation of Responses:

1. Each restricted stock unit represents the right to receive one share of common stock of Acadian Asset Management Inc.

2. On February 13, 2026, the reporting person was granted 5,407 restricted stock units, vesting in equal annual installments over a three-year period with 1/3 of the shares vesting on each of February 13, 2027, February 13, 2028 and February 13, 2029.

3. On February 14, 2025, the reporting person was granted 12,018 restricted stock units, vesting in equal annual installments over a three-year period with 1/3 of the shares vesting on each of February 14, 2026, February 14, 2027 and February 14, 2028.

4. On February 15, 2023, the reporting person was granted 4,059 restricted stock units, vesting in equal annual installments over a three-year period with 1/3 of the shares vesting on each of February 15, 2024, February 15, 2025 and February 15, 2026. On February 15, 2024, the reporting person was granted 11,481 restricted stock units, vesting in equal annual installments over a three-year period with 1/3 of the shares vesting on each of February 15, 2025, February 15, 2026 and February 15, 2027.

Remarks:

	/s/ Richard J. Hart, By POA for Christina Wiater	02/18/2026
	** 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.

FAQ

What insider transactions did AAMI executive Christina Wiater report?

Christina Wiater reported RSU grants, RSU conversions to common stock, and tax-withholding share dispositions. The activity reflects routine equity compensation, including vesting of prior awards and a new grant, rather than open-market buying or selling of Acadian Asset Management Inc. common shares.

How many restricted stock units did AAMI grant to Christina Wiater?

Christina Wiater received 5,407 restricted stock units. Each RSU represents one share of Acadian Asset Management Inc. common stock and vests in three equal annual installments on February 13, 2027, February 13, 2028, and February 13, 2029, subject to continued service and plan terms.

How many AAMI common shares did Christina Wiater acquire through RSU vesting?

Through RSU vesting and conversion, Christina Wiater acquired 4,006 common shares on February 14, 2026, and 5,180 common shares on February 15, 2026. These shares were issued at a stated price of $0.00 per share as part of her equity compensation arrangements.

Were any of Christina Wiater’s AAMI share dispositions open-market sales?

The reported share dispositions were tax-withholding transactions, not open-market sales. To satisfy tax liabilities on vesting, 1,176 shares and 1,521 shares of Acadian Asset Management Inc. common stock were withheld at $51.85 per share and delivered for tax payments.

What are Christina Wiater’s AAMI share and RSU holdings after these transactions?

Following the reported transactions, Christina Wiater directly held 25,614 shares of Acadian Asset Management Inc. common stock and 26,432 restricted stock units. These RSUs, when vested and settled, each entitle her to receive one additional share of common stock.

How do the new AAMI RSUs granted to Christina Wiater vest over time?

The 5,407 restricted stock units granted to Christina Wiater on February 13, 2026 vest in three equal annual installments. One-third of the units vest on February 13, 2027, one-third on February 13, 2028, and the final third on February 13, 2029, under the grant terms.