[Form 4] Acadian Asset Management Inc. Insider Trading Activity

Rhea-AI Filing Summary

Acadian Asset Management Inc. reported that investment funds managed by Paulson & Co. Inc. executed an open-market sale of 1,900,000 shares of common stock at $77.25 per share. Following the transaction, the Funds indirectly hold 5,843,282 shares, with Paulson and John Paulson disclaiming beneficial ownership beyond what may be deemed indirect.

Insights

Equity ownership and governance analyst

Paulson-managed funds sold 1.9M AAMI shares but retain a sizable position.

Investment funds managed by Paulson & Co. Inc. conducted an open-market sale of 1,900,000 shares of Acadian Asset Management Inc. common stock at $77.25 per share. The transaction is reported as indirect ownership "By Managed Funds."

After the sale, the Funds still hold 5,843,282 shares, indicating a substantial continuing stake. Footnotes state that Paulson and John Paulson may be deemed to indirectly beneficially own these securities but expressly disclaim beneficial ownership for certain legal purposes, framing this as a portfolio-level adjustment rather than a personal trade.

Insider Trade Summary

Net Seller: 1,900,000 shares ($146,775,000)

Net Sell 1 txn

Insider PAULSON & CO. INC.

Role null

Sold 1,900,000 shs ($146.78M)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $0.001	1,900,000	$77.25	$146.78M

Holdings After Transaction: Common Stock, par value $0.001 — 5,843,282 shares (Indirect, By Managed Funds)

Footnotes (1)

1. Paulson & Co. Inc. ("Paulson") is the investment manager of investment funds (the "Funds"). John Paulson is the controlling person of Paulson. All securities reported on this Form 4 are owned by the Funds. Each of Paulson and John Paulson may be deemed to indirectly beneficially own the securities directly owned by the Funds. Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the "Act"), the filing of this Form 4 shall not be deemed an admission by any person reporting on this Form 4 that such person, for purposes of Section 16 of the Act or otherwise, is the beneficial owner of any equity securities covered by this Form 4.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/22/2026 - 05:15 PM Accepted by SEC EDGAR 06/22/2026 - 05:14 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^*

PAULSON & CO. INC.

(Last) (First) (Middle)

15 EXCHANGE PLACE

(Street)

JERSEY CITY NEW JERSEY 07302

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/17/2026

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

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

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

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, par value $0.001	06/17/2026		S		1,900,000	D	$77.25	5,843,282	I(1)(2)	By Managed Funds

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. Paulson & Co. Inc. ("Paulson") is the investment manager of investment funds (the "Funds"). John Paulson is the controlling person of Paulson. All securities reported on this Form 4 are owned by the Funds.

2. Each of Paulson and John Paulson may be deemed to indirectly beneficially own the securities directly owned by the Funds. Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the "Act"), the filing of this Form 4 shall not be deemed an admission by any person reporting on this Form 4 that such person, for purposes of Section 16 of the Act or otherwise, is the beneficial owner of any equity securities covered by this Form 4.

	PAULSON & CO. INC. /s/ Stuart L. Merzer, General Counsel & Chief Compliance Officer	06/22/2026
	** 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.
* Form 4: SEC 1474 (03-26)