| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
See Remarks | Director | Director, 10% Owner +1 more
9 companies
Michael Stuart Klein is See Remarks at CCXI, with reported holdings spanning 9 companies. Michael Stuart Klein's net worth is not public. Form 4 filings only show shares in the companies where this person is an insider; those holdings are worth an estimated $368.0M at current prices.
Our model assigns Michael Stuart Klein a below-average insider score of 42/100, based on 4 past trades. Over a 12-month horizon, 33.3% of those trades were profitable, with an average 12-month return of +22.2%.
Michael Stuart Klein's largest disclosed position is in CCXI as See Remarks, worth about $152.9M. Net of sales, the CCXI filings show accumulation of 500,000 shares.
Michael Stuart Klein has 33 Form 4 filings on record from October 2020 to August 2026, across 9 companies: Churchill Capital Corp XIII (XIII), 2026; Director at Skillsoft (SKIL), 2021–2026; Churchill Capital Corp XII (CXII), 2026, and 6 more.
The 44 reported transactions were 10 open-market purchases, 8 option or other derivative awards, 8 option exercises and 8 stock awards, plus smaller numbers of other types.
Counted by filing, the open-market trades come to 9 purchases worth about $42.0M and 3 sales worth about $25.2M.
The largest open-market purchase was 725,000 shares of CCIX at an average $10.00 on May 6, 2024, about $7.3M.
The largest open-market sale was 250,000 shares of OKLO at an average $63.06 on June 20, 2025, about $15.8M. Twelve months later OKLO was up 1%.
None of the 3 sales since April 2023 was marked as made under a Rule 10b5-1 trading plan.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Aug 3, 2026 | XIII Churchill Capital Corp Xiii | See Remarks | Buy | 350,000 | $10.00 | $3,500,000.00 | New | - | - | |
| Apr 29, 2026 | CXII Churchill Capital Corp XII | See Remarks | Buy | 350,000 | $10.00 | $3,500,000.00 | New | - | - | |
| Dec 18, 2025 | CCXI Churchill Capital Corp XI | See Remarks | Buy | 500,000 | $10.00 | $5,000,000.00 | +3.6% | - | - | |
| Sep 22, 2025 | OKLO Oklo Inc. | Director, 10% Owner | Sell | 50,000 | $133.76 | $6,687,912.00 | -25.0% | -40.5% | -71.2% | |
| Jun 23, 2025 | OKLO Oklo Inc. | Director | Sell | 50,000 | $54.85 | $2,742,652.79 | -20.0% | +154.6% | +3.8% | |
| Jun 20, 2025 | OKLO Oklo Inc. | Director | Sell | 250,000 | $63.06 | $15,764,275.00 | -50.0% | +81.1% | +0.8% | |
| May 15, 2025 | CCCX Churchill Capital Corp X/cayman | See Remarks | Buy | 300,000 | $10.00 | $3,000,000.00 | +2.9% | - | - | |
| May 6, 2024 | CCIX Churchill Capital Corp Ix/cayman | See Remarks | Buy | 725,000 | $10.00 | $7,250,000.00 | New | - | - | |
| Nov 17, 2020 | CTEV Claritev Corp | Director | Buy | 700,000 | $7.04 | $4,925,900.00 | +2.4% | - | - | |
| Nov 16, 2020 | CTEV Claritev Corp | Director | Buy | 700,000 | $7.11 | $4,977,420.00 | +2.4% | - | - |