Mersana Therapeutics, Inc.
MRSNDelisted Jan 6, 2026- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001442836
Mersana Therapeutics, Inc. was delisted on Jan 6, 2026; its insiders filed their last Form 4 on Jan 6, 2026; 51 institutions reported holding it in 13F filings for Q4 2025, worth $64.8M in total; no superinvestor held it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Mersana Therapeutics, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 0 filings
- Insiders trading
- 0
- Net value
- $0
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Mersana Therapeutics, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Mott David M | Director | 0Indirect | Jan 6, 2026 | 1 |
| Hege Kristen | Director | 0 | Jan 6, 2026 | 1 |
| Dere Willard H | Director | 0 | Jan 6, 2026 | 1 |
| Protopapas Anna | Director | 0Indirect | Jan 6, 2026 | 1 |
| Alleva Lawrence M | Director | 0Indirect | Jan 6, 2026 | 1 |
| Carvajal Alejandra | SVP, Chief Legal Officer | 0 | Jan 6, 2026 | 1 |
| Huber Martin H. Jr. | President, CEO | 0 | Jan 6, 2026 | 1 |
| Hack Andrew A. F. | Director | 0Indirect | Jan 6, 2026 | 1 |
| Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | 0 | Jan 6, 2026 | 1 |
| Diaz Allene M. | Director | 0 | Jan 6, 2026 | 1 |
| DeSchuytner Brian | SVP, COO & CFO | 0 | Jan 6, 2026 | 1 |
| Mandelia Ashish | VP, Chief Accounting Officer | 0 | Jan 6, 2026 | 1 |
| Bala Mohan | SVP, Chief Development | 0 | Jan 6, 2026 | 2 |
| EcoR1 Capital, LLC | 10% Owner | 11,328,000Indirect | Dec 23, 2024 | 0 |
| Misra Tushar | SVP, Chief Manuf. Officer | 17,966 | Jan 17, 2024 | 0 |
| Yang Arvin | SVP, Chief Medical Officer | 30,821 | Jan 18, 2023 | 0 |
| Kaufman Michael J. | Chief Manufacturing Officer | 32,622 | Jul 19, 2021 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Apr 28, 2022 (view filing) | Apr 26 | 2 days | Carvajal AlejandraChief Legal Officer | SSale | −3.95K | $3.69 | −$14.6K | −29.8%9.30K after | |
| Apr 14, 2022 (view filing) | Apr 13 | 1 day | Hack Andrew A. F.Director | PPurchase | +617.3K | $4.05 | +$2.50M | +8.7%7.74M after | |
| Apr 13, 2022 (view filing) | Apr 12 | 1 day | Hack Andrew A. F.Director | PPurchase | +598.1K | $4.18 | +$2.50M | +9.2%7.12M after | |
| Feb 8, 2022 (view filing) | Feb 7 | 1 day | Hack Andrew A. F.Director | PPurchase | +1.14M | $4.42 | +$5.02M | +21.1%6.52M after | |
| Jan 19, 2022 (view filing) | Jan 18 | 1 day | Lowinger Timothy BChief Science & Tech Off. | SSale | −4.74K | $5.92 | −$28.1K | −3.5%131.2K after | |
| Jan 19, 2022 (view filing) | Jan 18 | 1 day | Mandelia AshishVP, Controller | SSale | −1.98K | $5.92 | −$11.7K | −37.0%3.37K after | |
| Jan 4, 2022 (view filing) | Dec 30, 2021 | 5 days | Hack Andrew A. F.Director | PPurchase | +815.0K | $6.15 | +$5.01M | +17.8%5.39M after | |
| Jan 3, 2022 (view filing) | Dec 29, 2021 | 5 days | Hack Andrew A. F.Director | PPurchase | +875.0K | $5.75 | +$5.03M | +23.7%4.57M after | |
| Dec 2, 2021 (view filing) | Dec 1 | 1 day | Yang ArvinChief Medical Officer | SSale | −5.53K | $6.81 | −$37.6K | −29.9%13.0K after | |
| Aug 24, 2021 (view filing) | Aug 20 | 4 days | Lowinger Timothy BChief Science & Tech. Officer | SSale | −2.22K | $11.01 | −$24.4K | −2.9%75.2K after | |
| Jul 22, 2021 (view filing) | Jul 20 | 2 days | Lowinger Timothy BChief Science & Tech. Officer | SSale | −2.23K | $12.11 | −$27.0K | −2.9%75.2K after | |
| Jul 19, 2021 (view filing) | Jul 16-19 | 3 days | Lowinger Timothy BChief Science & Tech. Officer | SSale | −16.3K | $12.24 | −$199.1K | −17.8%75.2K after | 2 lots |
| Jul 19, 2021 (view filing) | Jul 16-19 | 3 days | Kaufman Michael J.Chief Manufacturing Officer | SSale | −12.1K | $12.24 | −$147.9K | −27.0%32.6K after | 2 lots |
| Jul 19, 2021 (view filing) | Jul 16-19 | 3 days | Protopapas AnnaPresident & CEO | SSale | −41.9K | $12.24 | −$513.2K | −12.9%283.0K after | 2 lots |
| Jul 2, 2021 (view filing) | Jul 1 | 1 day | Lowinger Timothy BCS & Technology Officer | SSale | −1.89K | $13.60 | −$25.6K | −5.7%31.4K after | |
| Jul 2, 2021 (view filing) | Jul 1 | 1 day | Mandelia AshishVP, Controller | SSale | −942 | $13.60 | −$12.8K | −100.0%0 after |