Director Kauffman Michael sold Verastem Inc ($VSTM) shares once on the open market in the last year for a total of $85,500, with his most recent sale on November 21, 2025. Among 11,678 insiders, his sales rank 9,789th by value, well below the average of 8.6 million dollars across 6.37 transactions. He reported no open market purchases.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 6, 2026 | Verastem, Inc. | $VSTM | Kauffman Michael | President of Development | A | Stock Option (right to buy) | 200000 | $0.00 | 200,000.0000 | 69,309,000 | 9999.99% | 0.29% |
| Nov. 21, 2025 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | S | Common Stock | 8550 | $10.00 | 8,666.0000 | 73,157,000 | 49.66% | 0.01% |
| June 18, 2025 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Not found | A | Stock Option (right to buy) | 5000 | $0.00 | 5,000.0000 | 7,305,800 | 9999.99% | 0.07% |
| June 4, 2025 | KYNTRA BIO, INC. | $KYNB | Kauffman Michael | Not found | A | Stock Option (Right to Buy) | 70000 | $0.00 | 70,000.0000 | 100,917,000 | 9999.99% | 0.07% |
| June 4, 2025 | KYNTRA BIO, INC. | $KYNB | Kauffman Michael | Not found | A | Stock Option (Right to Buy) | 120000 | $0.00 | 120,000.0000 | 100,917,000 | 9999.99% | 0.12% |
| May 22, 2025 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | A | Common Stock | 8333 | $0.00 | 17,216.0000 | 54,173,000 | 93.81% | 0.02% |
| May 22, 2025 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | A | Stock Option (right to buy) | 12500 | $0.00 | 12,500.0000 | 54,173,000 | 9999.99% | 0.02% |
| Aug. 21, 2024 | Adicet Bio, Inc. | $ACET | Kauffman Michael | Not found | A | Stock Option (Right to Buy) | 18500 | $0.00 | 18,500.0000 | 0 | 9999.99% | 0.00% |
| Aug. 21, 2024 | Adicet Bio, Inc. | $ACET | Kauffman Michael | Not found | D | Stock Option (Right to Buy) | 26400 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Aug. 21, 2024 | Adicet Bio, Inc. | $ACET | Kauffman Michael | Not found | A | Stock Option (Right to Buy) | 26400 | $0.00 | 26,400.0000 | 0 | 9999.99% | 0.00% |
| Aug. 21, 2024 | Adicet Bio, Inc. | $ACET | Kauffman Michael | Not found | A | Stock Option (Right to Buy) | 37000 | $0.00 | 37,000.0000 | 0 | 9999.99% | 0.00% |
| Aug. 21, 2024 | Adicet Bio, Inc. | $ACET | Kauffman Michael | Not found | D | Stock Option (Right to Buy) | 37000 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Aug. 21, 2024 | Adicet Bio, Inc. | $ACET | Kauffman Michael | Not found | D | Stock Option (Right to Buy) | 18500 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| June 20, 2024 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Not found | A | Stock Option (right to buy) | 50000 | $0.00 | 50,000.0000 | 0 | 9999.99% | 0.00% |
| June 18, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | A | Stock Option (right to buy) | 12500 | $0.00 | 12,500.0000 | 26,832,000 | 9999.99% | 0.05% |
| June 18, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | A | Common Stock | 8333 | $0.00 | 8,883.0000 | 26,832,000 | 1515.09% | 0.03% |
| June 5, 2024 | Adicet Bio, Inc. | $ACET | Kauffman Michael | Not found | A | Stock Option (Right to Buy) | 26400 | $0.00 | 26,400.0000 | 0 | 9999.99% | 0.00% |
| June 5, 2024 | Adicet Bio, Inc. | $ACET | Kauffman Michael | Not found | S | Common Stock | 5900 | $1.43 | 5,900.0000 | 0 | 50.00% | 0.00% |
| June 5, 2024 | Adicet Bio, Inc. | $ACET | Kauffman Michael | Not found | A | Common Stock | 5900 | $0.00 | 11,800.0000 | 0 | 100.00% | 0.00% |
| March 11, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | D | Stock Option (right to buy) | 2083 | $0.00 | 0.0000 | 22,054,000 | 100.00% | 0.01% |
| March 11, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | D | Stock Option (right to buy) | 2083 | $0.00 | 0.0000 | 22,054,000 | 100.00% | 0.01% |
| March 11, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | D | Stock Option (right to buy) | 2083 | $0.00 | 0.0000 | 22,054,000 | 100.00% | 0.01% |
| March 11, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | D | Stock Option (right to buy) | 2083 | $0.00 | 0.0000 | 22,054,000 | 100.00% | 0.01% |
| March 11, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | D | Stock Option (right to buy) | 2083 | $0.00 | 0.0000 | 22,054,000 | 100.00% | 0.01% |
| March 11, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | D | Stock Option (right to buy) | 2083 | $0.00 | 0.0000 | 22,054,000 | 100.00% | 0.01% |
| March 11, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | A | Stock Option (right to buy) | 16078 | $0.00 | 16,078.0000 | 22,054,000 | 9999.99% | 0.07% |
| March 11, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | D | Stock Option (right to buy) | 2083 | $0.00 | 0.0000 | 22,054,000 | 100.00% | 0.01% |
| March 11, 2024 | Verastem, Inc. | $VSTM | Kauffman Michael | Director | D | Stock Option (right to buy) | 1497 | $0.00 | 0.0000 | 22,054,000 | 100.00% | 0.01% |
| July 24, 2023 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Director | D | Stock Option (Right to Buy) | 8896 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| July 24, 2023 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Director | D | Stock Option (Right to Buy) | 8896 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| July 24, 2023 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Director | A | Stock Option (Right to Buy) | 8896 | $0.00 | 8,896.0000 | 0 | 9999.99% | 0.00% |
| July 24, 2023 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Director | D | Stock Option (Right to Buy) | 26000 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| July 24, 2023 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Director | A | Stock Option (Right to Buy) | 26000 | $0.00 | 26,000.0000 | 0 | 9999.99% | 0.00% |
| July 24, 2023 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Director | D | Stock Option (Right to Buy) | 26000 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| July 24, 2023 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Director | A | Stock Option (Right to Buy) | 26000 | $0.00 | 26,000.0000 | 0 | 9999.99% | 0.00% |
| July 24, 2023 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Director | A | Stock Option (Right to Buy) | 8896 | $0.00 | 8,896.0000 | 0 | 9999.99% | 0.00% |
| June 15, 2023 | Kezar Life Sciences, Inc. | $KZR | Kauffman Michael | Director | A | Stock Option (right to buy) | 35000 | $0.00 | 35,000.0000 | 0 | 9999.99% | 0.00% |