Morrison Briggs, a director at Arvinas Inc. ($ARVN), made two open market purchases of common shares totaling nearly half a million dollars in the last year. His most recent buy occurred on March 6, 2026. These purchases rank 887th among 4,983 individual insiders in our database, where the average buy amounts to 1.5 million dollars across 3.29 transactions. Briggs reported no open market sales during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 6, 2026 | ARVINAS, INC. | $ARVN | Morrison Briggs | Director | P | Common Stock | 20000 | $13.40 | 96,021.0000 | 73,400,000 | 26.31% | 0.03% |
| Sept. 22, 2025 | ARVINAS, INC. | $ARVN | Morrison Briggs | Director | P | Common Stock | 30000 | $7.57 | 76,021.0000 | 73,200,000 | 65.19% | 0.04% |
| June 25, 2025 | ARVINAS, INC. | $ARVN | Morrison Briggs | Director | A | Common Stock | 16025 | $0.00 | 46,021.0000 | 68,800,000 | 53.42% | 0.02% |
| June 25, 2025 | ARVINAS, INC. | $ARVN | Morrison Briggs | Director | A | Stock Option (right to buy) | 23105 | $0.00 | 23,105.0000 | 68,800,000 | 9999.99% | 0.03% |
| June 12, 2025 | Werewolf Therapeutics, Inc. | $HOWL | Morrison Briggs | Not found | A | Stock Option (right to buy) | 27000 | $0.00 | 27,000.0000 | 44,827,159 | 9999.99% | 0.06% |
| June 5, 2025 | CRISPR Therapeutics AG | $CRSP | Morrison Briggs | Not found | A | Stock Option (Right to Buy) | 13000 | $0.00 | 13,000.0000 | 85,774,474 | 9999.99% | 0.02% |
| June 26, 2024 | Carisma Therapeutics Inc. | $CARM | Morrison Briggs | Director | A | Stock Option (Right to Buy) | 19350 | $0.00 | 19,350.0000 | 0 | 9999.99% | 0.00% |
| June 17, 2024 | Repare Therapeutics Inc. | $RPTX | Morrison Briggs | Not found | A | Stock Option (right to buy) | 27200 | $0.00 | 27,200.0000 | 42,093,293 | 9999.99% | 0.06% |
| May 29, 2024 | ARVINAS, INC. | $ARVN | Morrison Briggs | Director | A | Common Stock | 5899 | $0.00 | 29,996.0000 | 68,000,000 | 24.48% | 0.01% |
| May 29, 2024 | ARVINAS, INC. | $ARVN | Morrison Briggs | Director | A | Stock Option (right to buy) | 9070 | $0.00 | 9,070.0000 | 68,000,000 | 9999.99% | 0.01% |
| May 24, 2024 | Werewolf Therapeutics, Inc. | $HOWL | Morrison Briggs | Not found | A | Stock Option (right to buy) | 17500 | $0.00 | 17,500.0000 | 0 | 9999.99% | 0.00% |
| Feb. 7, 2024 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | A | Common Stock | 17000 | $0.00 | 34,836.0000 | 0 | 95.31% | 0.00% |
| Aug. 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | S | Common Stock | 52855 | $18.27 | 17,836.0000 | 0 | 74.77% | 0.00% |
| Aug. 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Stock Options (Right to buy) | 52855 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Aug. 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Common Stock | 52855 | $8.77 | 70,691.0000 | 0 | 296.34% | 0.00% |
| July 10, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Common Stock | 52855 | $8.77 | 70,691.0000 | 0 | 296.34% | 0.00% |
| July 10, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Stock Options (Right to buy) | 52855 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| July 10, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | S | Common Stock | 52855 | $20.40 | 17,836.0000 | 0 | 74.77% | 0.00% |
| June 21, 2023 | Werewolf Therapeutics, Inc. | $HOWL | Morrison Briggs | Director | A | Stock Option (right to buy) | 13200 | $0.00 | 13,200.0000 | 0 | 9999.99% | 0.00% |
| June 15, 2023 | ARVINAS, INC. | $ARVN | Morrison Briggs | Director | A | Common Stock | 4121 | $0.00 | 24,097.0000 | 53,200,000 | 20.63% | 0.01% |
| June 15, 2023 | ARVINAS, INC. | $ARVN | Morrison Briggs | Director | A | Stock Option (right to buy) | 12787 | $0.00 | 12,787.0000 | 53,200,000 | 9999.99% | 0.02% |
| June 8, 2023 | Repare Therapeutics Inc. | $RPTX | Morrison Briggs | Director | A | Stock Option (right to buy) | 27200 | $0.00 | 27,200.0000 | 0 | 9999.99% | 0.00% |
| June 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Common Stock | 24582 | $6.38 | 42,418.0000 | 0 | 137.82% | 0.00% |
| June 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Common Stock | 28273 | $8.77 | 70,691.0000 | 0 | 66.65% | 0.00% |
| June 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | S | Common Stock | 24582 | $21.18 | 46,109.0000 | 0 | 34.77% | 0.00% |
| June 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | S | Common Stock | 28273 | $21.18 | 17,836.0000 | 0 | 61.32% | 0.00% |
| June 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Stock Options (Right to buy) | 28273 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| June 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Stock Options (Right to buy) | 24582 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| June 6, 2023 | Carisma Therapeutics Inc. | $CARM | Morrison Briggs | Director | A | Stock Option (Right to Buy) | 38700 | $0.00 | 38,700.0000 | 0 | 9999.99% | 0.00% |
| May 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Stock Options (Right to buy) | 52855 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| May 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Common Stock | 52855 | $6.38 | 70,691.0000 | 0 | 296.34% | 0.00% |
| May 9, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | S | Common Stock | 52855 | $21.41 | 17,836.0000 | 0 | 74.77% | 0.00% |
| April 10, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | S | Common Stock | 52855 | $19.53 | 17,836.0000 | 0 | 74.77% | 0.00% |
| April 10, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Stock Options (Right to buy) | 52855 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| April 10, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | Not found | M | Common Stock | 52855 | $6.38 | 70,691.0000 | 0 | 296.34% | 0.00% |
| March 13, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | President, Head of R&D | M | Common Stock | 52854 | $6.38 | 70,690.0000 | 0 | 296.33% | 0.00% |
| March 13, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | President, Head of R&D | S | Common Stock | 52854 | $22.53 | 17,836.0000 | 0 | 74.77% | 0.00% |
| March 13, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | President, Head of R&D | M | Stock Option (Right to Buy) | 52854 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| March 7, 2023 | Carisma Therapeutics Inc. | $CARM | Morrison Briggs | Director | A | Stock Option (Right to Buy) | 63310 | $0.00 | 63,310.0000 | 0 | 9999.99% | 0.00% |
| March 7, 2023 | Carisma Therapeutics Inc. | $CARM | Morrison Briggs | Director | A | Stock Option (Right to Buy) | 34189 | $0.00 | 34,189.0000 | 0 | 9999.99% | 0.00% |
| March 7, 2023 | Carisma Therapeutics Inc. | $CARM | Morrison Briggs | Director | A | Common Stock | 12175 | $0.00 | 12,175.0000 | 0 | 9999.99% | 0.00% |
| Feb. 6, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | President, Head of R&D | M | Stock Options (Right to buy) | 52854 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Feb. 6, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | President, Head of R&D | M | Common Stock | 52854 | $6.38 | 70,690.0000 | 0 | 296.33% | 0.00% |
| Feb. 6, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | President, Head of R&D | S | Common Stock | 52854 | $26.83 | 17,836.0000 | 0 | 74.77% | 0.00% |
| Feb. 2, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Morrison Briggs | President, Head of R&D | A | Stock Options (Right to buy) | 32000 | $28.55 | 32,000.0000 | 0 | 9999.99% | 0.00% |