Willard H. Dere's most recent trade in Mersana Therapeutics Inc was a trade of 61,500 Stock Option (right to buy) done . Disclosure was reported to the exchange on June 12, 2025.
| Stock | Client Name | Client Category | Action | Reported to Exchange | Quantity | Post Transaction Holding | Traded % | Avg. Price | Value | Security Type |
|---|---|---|---|---|---|---|---|---|---|---|
| Mersana Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 12 Jun 2025 | 61,500 | 61,500 | - | - | Stock Option (right to buy) | |
| Metagenomi Inc. | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 10 Jun 2025 | 21,000 | 21,000 | - | - | Stock Option (Right to Buy) | |
| Biomarin Pharmaceutical In... | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 20 May 2025 | 6,650 | 38,950 (0%) | 0% | 0 | Common Stock | |
| Seres Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 10 Apr 2025 | 100,000 | 100,000 | - | - | Stock Option (right to buy) | |
| Mersana Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 11 Jun 2024 | 55,000 | 55,000 | - | - | Stock Option (right to buy) | |
| Biomarin Pharmaceutical In... | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 21 May 2024 | 4,720 | 32,300 (0%) | 0% | 0 | Common Stock | |
| Seres Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 04 Apr 2024 | 60,000 | 60,000 | - | - | Stock Option (right to buy) | |
| Metagenomi Inc. | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 01 Apr 2024 | 78,636 | 78,636 | - | - | Stock Option (Right to Buy) | |
| Mersana Therapeutics Inc | Willard Dere H. | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 02 Jan 2024 | 6,112 | 39,182 (0%) | 0% | 0 | Common Stock | |
| Mersana Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 03 Jul 2023 | 4,217 | 22,059 (0%) | 0% | 0 | Common Stock | |
| Mersana Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 08 Jun 2023 | 18,355 | 18,355 | - | - | Stock Option (right to buy) | |
| Mersana Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 08 Jun 2023 | 14,467 | 17,842 (0%) | 0% | 0 | Common Stock | |
| Biomarin Pharmaceutical In... | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 23 May 2023 | 4,190 | 27,580 (0%) | 0% | 0 | Common Stock | |
| Mersana Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 03 Apr 2023 | 3,375 | 3,375 (0%) | 0% | 0 | Common Stock | |
| Seres Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 3.15 per share. | 05 Jul 2022 | 31,746 | 31,746 (0%) | 0% | 3.2 | 100,000 | COMMON STOCK |
| Seres Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 22 Jun 2022 | 35,000 | 35,000 | - | - | Stock Option (right to buy) | |
| Mersana Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 09 Jun 2022 | 45,000 | 45,000 | - | - | Stock Option (right to buy) | |
| Biomarin Pharmaceutical In... | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 24 May 2022 | 4,980 | 23,390 (0%) | 0% | 0 | Common Stock | |
| Mersana Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 03 Jan 2022 | 12,847 | 12,847 | - | - | Stock Option (right to buy) | |
| Mersana Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 11 Jun 2021 | 25,050 | 25,050 | - | - | Stock Option (right to buy) | |
| Biomarin Pharmaceutical In... | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 25 May 2021 | 5,120 | 18,410 (0%) | 0% | 0 | Common Stock | |
| Mersana Therapeutics Inc | Willard H. Dere | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 15 Jan 2021 | 3,141 | 3,141 | - | - | Stock Option (right to buy) |