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AAMI Acadian Asset Management Inc. Insider Trading

Latest: Insider Sold $146.8M of Shares · Jun 2026

Multiple insiders have been active at Acadian Asset Management Inc. (AAMI): 3 distinct insiders account for 0 buy filings and 5 sell filings as of Jun 2026. Its highest-significance filing in the last 90 days: Paulson & Co. Inc sold $146.8M, transaction dated Jun 2026.

4 filings analyzed · Latest 2026-06-22

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Buys
0
Sells
5
Insiders
3
Direction
Net selling

Acadian Asset Management Inc. leadership

CEO
Kelly Young — CHIEF EXECUTIVE OFFICER
CFO
Scott Hynes — CHIEF FINANCIAL OFFICER
General Counsel
Richard J. Hart — Chief Legal and Administrative Officer
Chair
John Paulson — Chairman

Historically, stocks have lagged the S&P 500 by a median ~4% over the 90 days after a high insider sell (n ≈ 3,996, 2024-2026). Past results don't predict the future. How we measure this ↗

June 2026
2026-06-22
high
1,900,000 shares
$146,775,000
@ $77.25
Significance 6

Paulson & Co. Inc (10% Owner) sold 1,900,000 shares of AAMI at $77.25; holdings now 5,843,282 shares (-24.5%)

Paulson & Co. Inc, a 10% owner, executed a substantial sale of 1,900,000 shares at $77.25 on 2026-06-17, reducing its stake by -24.5% to 5,843,282 shares and realizing $146,775,000.00 in proceeds. The stock currently trades at $73.89, below the sale price, and is -13.8% from its 52-week high of $85.73, suggesting the exit occurred closer to a local peak. The insider's own prior sale at this ticker (2025-09-03) was well-timed, with a -8.5% 90-day return post-sale, indicating a pattern of selling before declines; this current sale's proximity to the 52-week high is consistent with that history. The company's fundamentals remain solid (P/E 31.31, +11.5% annual revenue growth, net income $24.3M), so the motivation appears driven by position sizing or capital reallocation rather than deteriorating business quality. The scale of the reduction warrants monitoring given Paulson's large ownership stake.

May 2026
2026-05-05
medium
CLO and CAO
100,000 shares
$6,697,021
@ $66.97
Significance 5

CLO and CAO Hart Richard Jonathan sells ~$6.7M in AAMI shares, trimming position by roughly 64% near 52-week highs.

Hart Richard Jonathan, the company's Chief Legal Officer and Chief Administrative Officer, sold approximately 100,000 shares in two transactions, reducing his holdings by more than half. The sales occurred at prices very close to the stock's 52-week high and follow a sharp rally over the past three months, suggesting he may be taking profits after the stock's recent strong performance. While the company is profitable with solid fundamentals, the CLO's decision to exit a majority of his position is noteworthy — it reduces his alignment with shareholders at a moment when the stock is trading near its peak valuation. This trade is a selling signal despite the company's sound financial health, and it suggests caution about near-term upside.

February 2026
2026-02-12
medium
28,753 shares
$1,475,029
@ $51.30
Significance 5

AAMI Director Robert Chersi sold 28,753 shares at $51.30 (Feb 11, 2026), reducing stake by -43.5%

Director Robert Chersi executed a substantial sale of 28,753 shares at $51.30, reducing his holdings from 66,137 shares to 37,384 shares (a -43.5% reduction). The sale occurred at $51.30 while the current price stands at $52.31, positioning the sale approximately 1.9% below current levels and 6.3% below the 52-week high of $55.85. Against a backdrop of strong recent performance (90-day change: +19.2%) and solid fundamentals (18.5% annual revenue growth, P/E of 21.26), the magnitude of this stake reduction—nearly half of his prior position—represents a material change in director holding level that merits investor attention to potential motivations and timing context not evident in the transaction data alone.

September 2025
2025-09-05
high
1,206,839 shares
$57,554,152
@ $47.69
Significance 7

Paulson & Co reduces AAMI stake by 1,206,839 shares ($57.6M) on 9/3; exits 13.5% of position at $47.69

Paulson & Co, a 10% shareholder, sold 1,206,839 shares (1.21M shares) of Acadian Asset Management at $47.69 on September 3, 2025, reducing its stake by 13.5% to 7,743,282 shares. The sale occurred near the company's 52-week high of $51.27, with the stock now trading at $44.46, down 2.9% over 30 days. The company shows solid fundamentals with 18.5% annual revenue growth and a reasonable P/E of 17.78 on $127.4M quarterly revenue, making the sale noteworthy as a material reduction by a significant shareholder during a period of accelerating appreciation (90-day gain of +45.8%). The magnitude of the divestiture—$57.6M across a $1.6B market cap—signals a meaningful shift in the 10% holder's position commitment to the asset.

November 2024
2024-11-13
medium
Chief Legal Officer
70,000 shares
$1,996,400
@ $28.52
Significance 4

Chief Legal Officer Hart Richard Jonathan sold 70,000 shares of BSIG at $28.52 on 2024-11-11 for $1,996,400.00

Hart Richard Jonathan, the Chief Legal Officer of BrightSphere Investment Group Inc., sold 70,000 shares at $28.52 on 2024-11-11, reducing his holdings by 31.0% from 225,778 to 155,778 shares. The transaction occurred near the upper end of the 52-week range ($16.02–$30.16) and only 1.8% below the 52-week high, following a strong 90-day appreciation of +27.2%. A significant reduction in holdings by a C-suite executive, particularly when executed near recent highs and following sustained share price momentum, warrants investor review to understand the motivation and timing context behind the disposition.

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