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EdgarHawk

Klein Michael Stuart

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Director Officer 10% Owner

Latest: Officer & Director buying · April 2026

6 filings analyzed · 4 companies · Latest 2026-04-29

Companies

Company Buys Sells Direction
Churchill Capital Corp XII CXIIU 1 0 Net buying
Churchill Capital Corp XI CCXIU 1 0 Net buying
Oklo Inc. OKLO 0 7 Net selling
Churchill Capital Corp X/Cayman INFQ 1 0 Net buying

Activity

April 2026
medium
Buy
350,000 shares
$3,500,000
Significance 4/10

Michael Stuart Klein buys 350,000 shares of CXIIU at $10.00 for $3,500,000.00 in newly listed SPAC

Michael Stuart Klein purchased 350,000 shares of Churchill Capital Corp XII at $10.00, establishing an initial position of 350,000 shares. The transaction occurred just 2 trading days after the company's recent listing, when the current market price stands at $10.10. This is a foundational insider purchase in a newly public SPAC, but the very recent listing date limits the ability to assess whether this purchase represents a significant pattern of insider support or is standard formation activity. The modest premium of the current price to the transaction price ($10.10 vs. $10.00) reflects normal post-listing price movement rather than a divergent trading signal.

December 2025
medium
Buy
500,000 shares
$5,000,000
Significance 6/10

Klein Michael Stuart bought 500,000 shares of CCXIU at $10.00 ($5.0M) on 2025-12-18, raising holdings to 14.30M shares

Klein Michael Stuart purchased 500,000 shares at $10.00, the apparent listing price for Churchill Capital Corp XI, bringing his post-transaction holdings to 14,300,000 shares. At current price of $10.22 (as of 2025-12-19, three trading days after listing), the stock has moved modestly above the transaction price. With the company in its earliest trading days, historical context and fundamentals remain unavailable, limiting the ability to assess whether this buy reflects conviction or is part of routine capital deployment. The magnitude of the purchase ($5.0M) and the substantial existing position (13.80M shares pre-transaction) suggest Klein maintains significant exposure to this SPAC, but the ultra-short trading history prevents meaningful pattern analysis.

September 2025
2025-09-24 Oklo Inc. OKLO
high
Sell
50,000 shares
$6,687,912
Significance 6/10

Director Klein sold 50,000 OKLO shares for $6,687,912.00 on 2025-09-22; prior OKLO sells all poorly timed

Klein Michael Stuart sold 50,000 shares (50.0K shares) totaling $6,687,912.00 across two separate transactions at prices of $133.40 and $135.20 on 2025-09-22, reducing his holdings by -25.0% vs pre-transaction. His prior trades at OKLO show a troubling timing pattern: all 5 previous sales generated positive 90-day returns of +21.3%, +21.3%, +24.7%, +9.9%, and +8.6%, meaning Klein sold before subsequent price appreciation and failed to capture those gains. The current sale occurred near the 52-week high of $142.65, but with the stock up +84.2% over the past 30 days and +134.9% over 90 days, the fundamental backdrop remains weak—the company posted a full-year net income of $-24,685,000.00 ($-24.7M) and carries a $19.4B market cap despite operating at a significant loss. This sale pattern at OKLO suggests systematic poorly-timed exits rather than conviction-driven reduction of an underperforming position.

June 2025
2025-06-25 Oklo Inc. OKLO
medium
Sell
50,000 shares
$2,742,653
Significance 6/10

Director Klein sold 50,000 shares for $2.7M at blended $54.85 on 2025-06-23, reducing stake from 250.0K to 200.0K shares

Klein Michael Stuart executed 3 separate sales totaling 50,000 shares for $2,742,652.79 on 2025-06-23, reducing his post-transaction holdings to 200,000 shares from a pre-transaction position of 250,000 shares—a 20% reduction in his stake. The sales occurred at prices ranging from $53.71 to $55.22, with a blended average of $54.85, notably close to the current price of $55.57. This activity occurred within a high-volatility trading environment where OKLO stock has appreciated 133.3% over 90 days but remains 18.3% below its 52-week high of $68.03. Klein's prior trades at OKLO (two sells on 2025-06-20 and 2025-06-18) demonstrate a pattern of liquidation activity over consecutive trading days, though their outcomes are not yet measurable. The company underlying this transaction reported net income of $-9,810,000.00 and remains unprofitable, a fundamental context relevant to any assessment of insider positioning decisions.

2025-06-23 Oklo Inc. OKLO
high
Sell
250,000 shares
$15,764,275
Significance 7/10

Director Michael Stuart Klein sold 250,000 shares (50% of holdings) for $15,764,275.00 at OKLO on 2025-06-18/20.

Director Michael Stuart Klein executed 2 separate sales totaling 250,000 shares for $15,764,275.00, reducing his stake from 500,000 to 250,000 shares (a 50% reduction in post-transaction holdings). The sales occurred at $63.53 and $62.74 per share over June 18–20, 2025, well above the current price of $55.11 and near the 52-week high of $68.03, indicating he liquidated a substantial portion of his position during a period of relative strength. The company remains unprofitable with net income of $-9,810,000.00 over its most recent full fiscal year, and the stock has since declined 19.0% from its 52-week high. His prior trading record at this ticker shows 3 earlier sales, all with outcomes not yet measurable due to recent dates. The timing and magnitude of this half-position liquidation warrants investor attention given the company's unprofitable status and the director's elimination of half his holdings.

May 2025
medium
Buy
300,000 shares
$3,000,000
Significance 6/10

Klein bought 300,000 shares of CCCXU at $10.00 ($3.0M); now holds 10,650,000 shares post-transaction.

Klein Michael Stuart purchased 300,000 shares at $10.00 on 2025-05-15, four days before the price moved to $10.40. This is a substantial acquisition in dollar terms ($3,000,000.00) by a significant shareholder, expanding his position from 10,350,000 shares to 10,650,000 shares (+2.9% vs pre-transaction holdings). CCCXU is a recently listed security (4 trading days at filing), so conventional valuation benchmarks and historical price anchors are not yet established. The purchase occurs at or near the unit price typical for blank-check instruments, suggesting acquisition timing relative to market-open trading conditions rather than reaction to material developments.

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