Michael Stuart Klein bought shares of Churchill Capital Corp X/Cayman ($CCCX) once on the open market in the last year for a total of $3 million, with the latest purchase on May 15, 2025; this ranks 240th among insiders. He also purchased Churchill Capital Corp XI ($CCXIW) shares once for $5 million, most recently on December 18, 2025, ranking 172nd. These buys exceed the average insider purchase of $1.46 million across 4,983 individuals. Klein sold Oklo Inc. ($OKLO) shares seven times for $25.2 million total, with the most recent sale on September 22, 2025, ranking 558th—below the $8.59 million average across 11,678 insiders.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 12, 2026 | Infleqtion, Inc. | $INFQ | Klein Michael Stuart | See Remarks | C | Class B ordinary shares | 10350000 | $0.00 | 0.0000 | 9,000,000 | 100.00% | 100.00% |
| Feb. 12, 2026 | Infleqtion, Inc. | $INFQ | Klein Michael Stuart | See Remarks | C | Common Stock | 10650000 | $0.00 | 10,650,000.0000 | 9,000,000 | 9999.99% | 100.00% |
| Feb. 12, 2026 | Infleqtion, Inc. | $INFQ | Klein Michael Stuart | See Remarks | J | Warrant (Right to Buy) | 75000 | $0.00 | 75,000.0000 | 9,000,000 | 9999.99% | 0.83% |
| Dec. 18, 2025 | Churchill Capital Corp XI | $CCXI | Klein Michael Stuart | See Remarks | P | Class A Ordinary Shares | 500000 | $10.00 | 14,300,000.0000 | 0 | 3.62% | 0.00% |
| Sept. 22, 2025 | Oklo Inc. | $OKLO | Klein Michael Stuart | Not found | S | Common Stock, par value $0.0001 per share | 10000 | $135.20 | 150,000.0000 | 139,018,305 | 6.25% | 0.01% |
| Sept. 22, 2025 | Oklo Inc. | $OKLO | Klein Michael Stuart | Not found | S | Common Stock, par value $0.0001 per share | 40000 | $133.40 | 160,000.0000 | 139,018,305 | 20.00% | 0.03% |
| July 17, 2025 | Skillsoft Corp. | $SKIL | Klein Michael Stuart | Not found | M | Restricted Stock Units | 20306 | $0.00 | 0.0000 | 8,320,914 | 100.00% | 0.24% |
| July 17, 2025 | Skillsoft Corp. | $SKIL | Klein Michael Stuart | Not found | A | Restricted Stock Units | 12430 | $0.00 | 12,430.0000 | 8,320,914 | 9999.99% | 0.15% |
| July 17, 2025 | Skillsoft Corp. | $SKIL | Klein Michael Stuart | Not found | M | Class A Common Stock | 20306 | $0.00 | 539,606.0000 | 8,320,914 | 3.91% | 0.24% |
| June 23, 2025 | Oklo Inc. | $OKLO | Klein Michael Stuart | Director | S | Common Stock, par value $0.0001 per share | 12100 | $53.71 | 212,900.0000 | 139,018,305 | 5.38% | 0.01% |
| June 23, 2025 | Oklo Inc. | $OKLO | Klein Michael Stuart | Director | S | Common Stock, par value $0.0001 per share | 25000 | $55.22 | 225,000.0000 | 139,018,305 | 10.00% | 0.02% |
| June 23, 2025 | Oklo Inc. | $OKLO | Klein Michael Stuart | Director | S | Common Stock, par value $0.0001 per share | 12900 | $55.22 | 200,000.0000 | 139,018,305 | 6.06% | 0.01% |
| June 18, 2025 | Oklo Inc. | $OKLO | Klein Michael Stuart | Director | S | Common Stock, par value $0.0001 per share | 100000 | $63.53 | 400,000.0000 | 139,018,305 | 20.00% | 0.07% |
| June 20, 2025 | Oklo Inc. | $OKLO | Klein Michael Stuart | Director | S | Common Stock, par value $0.0001 per share | 150000 | $62.74 | 250,000.0000 | 139,018,305 | 37.50% | 0.11% |
| May 15, 2025 | Infleqtion, Inc. | $INFQ | Klein Michael Stuart | See Remarks | P | Class A Ordinary Shares | 300000 | $10.00 | 10,650,000.0000 | 9,000,000 | 2.90% | 3.33% |
| April 30, 2025 | Claritev Corp | $CTEV | Klein Michael Stuart | Director | A | Class A common stock | 7356 | $0.00 | 586,516.0000 | 16,930,827 | 1.27% | 0.04% |
| Nov. 14, 2024 | Oklo Inc. | $OKLO | Klein Michael Stuart | Director | J | Common Stock, par value $0.0001 per share | 13450000 | $0.00 | 4,247,800.0000 | 0 | 76.00% | 0.00% |
| July 19, 2024 | Skillsoft Corp. | $SKIL | Klein Michael Stuart | Not found | A | Restricted Stock Units | 20306 | $0.00 | 20,306.0000 | 0 | 9999.99% | 0.00% |
| July 18, 2024 | Skillsoft Corp. | $SKIL | Klein Michael Stuart | Not found | M | Restricted Stock Units | 3750 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| July 18, 2024 | Skillsoft Corp. | $SKIL | Klein Michael Stuart | Not found | M | Class A Common Stock | 3750 | $0.00 | 519,300.0000 | 0 | 0.73% | 0.00% |
| May 9, 2024 | Oklo Inc. | $OKLO | Klein Michael Stuart | Director | M | Class A Common Stock, par value $0.0001 per share | 12500000 | $0.00 | 13,950,000.0000 | 0 | 862.07% | 0.00% |
| May 9, 2024 | Oklo Inc. | $OKLO | Klein Michael Stuart | Director | M | Class B Common Stock, par value $0.0001 per share | 12500000 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| July 12, 2021 | Oklo Inc. | $OKLO | Klein Michael Stuart | Chairman | A | Class A common stock, par value $0.0001 per share | 1450000 | $10.00 | 1,450,000.0000 | 0 | 9999.99% | 0.00% |
| May 9, 2024 | Oklo Inc. | $OKLO | Klein Michael Stuart | Director | M | Class A Common Stock, par value $0.0001 per share | 12500000 | $0.00 | 13,935,500.0000 | 0 | 870.78% | 0.00% |
| May 9, 2024 | Oklo Inc. | $OKLO | Klein Michael Stuart | Director | M | Class B Common Stock, par value $0.0001 per share | 12500000 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| May 6, 2024 | Churchill Capital Corp IX/Cayman | $CCIX | Klein Michael Stuart | See Remarks | P | Class A Ordinary Shares | 725000 | $10.00 | 725,000.0000 | 0 | 9999.99% | 0.00% |
| April 24, 2024 | Claritev Corp | $CTEV | Klein Michael Stuart | Director | A | Class A common stock | 172413 | $0.00 | 23,166,492.0000 | 16,695,207 | 0.75% | 1.03% |
| July 20, 2023 | Skillsoft Corp. | $SKIL | Klein Michael Stuart | Not found | A | Restricted Stock Units | 75000 | $0.00 | 75,000.0000 | 0 | 9999.99% | 0.00% |
| June 23, 2023 | Skillsoft Corp. | $SKIL | Klein Michael Stuart | Not found | M | Restricted Stock Units | 35398 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| June 23, 2023 | Skillsoft Corp. | $SKIL | Klein Michael Stuart | Not found | M | Class A Common Stock | 35398 | $0.00 | 10,311,047.0000 | 0 | 0.34% | 0.00% |
| April 26, 2023 | Claritev Corp | $CTEV | Klein Michael Stuart | Director | A | Class A common stock | 106382 | $0.00 | 22,994,079.0000 | 16,657,259 | 0.46% | 0.64% |