Every Form 4 that Acadian Asset Management Inc. (AAMI) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow AAMI and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full AAMI filings page.
Acadian Asset Management Inc. officer Christina Wiater reported selling a total of 25,614 shares of common stock in four transactions on August 3–4, 2026. Reported sales included 7,978 shares at a weighted average of $86.6082 and 17,389 shares at a weighted average of $87.4922, with the weighted averages reflecting multiple trades executed within stated intraday price ranges.
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.
Acadian Asset Management Inc. director Barbara Trebbi reported routine equity compensation and non-market transfers. On June 12, 2026, she was granted 1,288 restricted stock units, each representing one share of common stock, under the Acadian Asset Management Inc. 2026 Equity Incentive Plan. These units vest on the earlier of June 12, 2027 and the date of the 2027 annual meeting of stockholders.
On June 15, 2026, she recorded two bona fide gifts of common stock totaling 20,520 shares: 10,260 shares related to the Landry Trebbi 2012 Family Grantor Trust for the benefit of her child, and 10,260 shares from her direct holdings. After these transactions, she held 28,797 common shares directly and 10,260 shares indirectly through the trust.
Chersi Robert J reported acquisition or exercise transactions in this Form 4 filing.
Acadian Asset Management Inc. director Robert J. Chersi received a grant of 1,288 restricted stock units on June 12, 2026 as equity compensation. Each unit represents one share of common stock and vests on the earlier of June 12, 2027 or the 2027 annual meeting of stockholders. Following this grant, he holds 1,288 restricted stock units directly.
Paulson John reported acquisition or exercise transactions in this Form 4 filing.
Acadian Asset Management Inc. director and ten percent owner John Paulson received a grant of 2,253 restricted stock units as equity compensation. Each unit represents one share of common stock and was issued under the company’s 2026 Equity Incentive Plan. The RSUs vest on the earlier of June 12, 2027 or the date of Acadian’s 2027 annual meeting of stockholders, aligning his compensation with future company performance.
Acadian Asset Management Inc. director and ten percent owner John Paulson exercised 5,750 restricted stock units into 5,750 shares of common stock on May 14, 2026. The units carried a conversion price of $0.00 per share. Following this equity award vesting and conversion, he directly holds 29,510 common shares.
Acadian Asset Management Inc. director Robert J. Chersi reported routine equity compensation activity and updated holdings. On May 14, 2026, he exercised 3,286 restricted stock units into 3,286 shares of common stock at a stated price of $0.00 per share, leaving him with 3,286 shares held directly.
He is also reported as having indirect ownership of 37,384 shares of common stock through the Robert J. Chersi 2012 Family Trust, which holds shares for the benefit of his children and has his spouse as trustee. The filing shows no open‑market purchases or sales and no remaining derivative position from these restricted stock units.
Acadian Asset Management Inc. director Barbara Trebbi exercised 3,286 restricted stock units, receiving the same number of shares of common stock. These RSUs were granted on May 14, 2025 and vested upon the earlier of May 14, 2026 and the 2026 annual meeting of stockholders. Following this conversion, Trebbi directly holds 39,057 shares of common stock, and no restricted stock units remain from this grant. The transaction reflects a compensation-related derivative exercise rather than an open-market stock purchase or sale.
Acadian Asset Management Inc. chief legal and administrative officer Richard Jonathan Hart reported selling a total of 100,000 shares of Common Stock in open-market transactions on May 4, 2026. The sales were executed at weighted average prices around the high-$60 range across multiple trades.
One block of 11,208 shares was sold at a weighted average price of $67.7269 per share, and another block of 88,792 shares was sold at a weighted average price of $66.8747 per share. Following these transactions, Hart directly holds 73,863 shares of Acadian Asset Management Inc. common stock.
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.
Acadian Asset Management Inc. CLO and CAO Richard Jonathan Hart reported multiple equity compensation transactions. On February 13, 2026, he received a grant of 21,602 restricted stock units (RSUs), each representing one share of common stock, vesting in three equal annual installments through February 13, 2029.
On February 14 and 15, 2026, RSUs from prior grants converted into 5,755 and 9,550 shares of common stock at no cost, increasing his direct holdings. To satisfy tax obligations, 2,782 shares on February 14 and 4,618 shares on February 15 were automatically disposed of at a price of $51.85 per share.
After these transactions, Hart directly owned 173,863 shares of common stock and 53,650 RSUs, reflecting ongoing equity-based compensation and routine tax-withholding dispositions rather than open-market purchases or sales.
Hynes Scott reported acquisition or exercise transactions in this Form 4 filing.
Acadian Asset Management Inc. reported an equity compensation grant to its Chief Financial Officer, Scott Hynes. On February 13, 2026, he was awarded 4,888 restricted stock units, each representing one share of Acadian common stock. These units vest in three equal annual installments, with one-third of the shares vesting on each of February 13, 2027, February 13, 2028, and February 13, 2029. Following this grant, Hynes holds 4,888 restricted stock units directly.
Young Kelly reported acquisition or exercise transactions in this Form 4 filing.
Acadian Asset Management Inc. reported that President and CEO Kelly Young received a grant of 48,748 restricted stock units on February 13, 2026. Each unit represents the right to receive one share of Acadian common stock.
The award vests in three equal annual installments, with one-third of the shares vesting on each of February 13, 2027, February 13, 2028, and February 13, 2029, aligning the CEO’s compensation with longer-term company performance.
Acadian Asset Management Inc. director Robert J. Chersi, through the Robert J. Chersi 2012 Family Trust, reported an open-market sale of 28,753 shares of common stock on February 11, 2026 at a weighted average price of $51.30 per share.
After this transaction, the trust indirectly holds 37,384 shares for the benefit of Chersi’s children, with his spouse serving as trustee. The price reflects multiple trades within a range of $51.00 to $51.70 per share.
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.