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.
13F holders, Q4 2024
Institutional positions in Mersana Therapeutics, Inc. as of Dec 31, 2024. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 132
- +18 vs. Q3 2024
- Shares held
- 104.3M
- −11.3M (−9.7%) vs. Q3 2024
- Total value
- $149.2M
- −$69.2M (−31.7%) vs. Q3 2024
- New holders
- 30
- 33 more added
- Sold out
- 12
- 40 more reduced
2 institutions that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MRSN on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 0 | $0 |
| Q1 2026 | 1 | $87 |
| Q4 2025 | 51 | $64.8M |
| Q3 2025 | 49 | $24.7M |
| Q2 2025 | 85 | $22.9M |
| Q1 2025 | 111 | $30.2M |
| Q4 2024 | 132 | $149.2M |
| Q3 2024 | 116 | $219.4M |
| Q2 2024 | 122 | $229.6M |
| Q1 2024 | 125 | $526.3M |
| Q4 2023 | 106 | $263.0M |
| Q3 2023 | 128 | $144.4M |
| Q2 2023 | 147 | $370.2M |
| Q1 2023 | 158 | $437.2M |
| Q4 2022 | 152 | $592.8M |
| Q3 2022 | 152 | $623.4M |
| Q2 2022 | 126 | $408.0M |
| Q1 2022 | 128 | $322.7M |
| Q4 2021 | 122 | $436.6M |
| Q3 2021 | 110 | $648.3M |
| Q2 2021 | 131 | $957.8M |
| Q1 2021 | 132 | $1.14B |
Institutions, Q4 2024
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q3 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Russell Investments Group, Ltd. | 11,812 | $16.9K | 0.00% | +1,047+9.7% | Added |
| Legal & General Group Plc | 11,097 | $15.9K | 0.00% | 00.0% | Unchanged |
| Wolverine Trading, LLC | 10,869 | $15.4K | 0.00% | +10,869 | New |
| Victory Capital Management Inc | 10,707 | $15.3K | 0.00% | −751−6.6% | Reduced |
| CIBC World Markets Corp | 10,616 | $15.2K | 0.00% | +10,616 | New |
| Ameritas Investment Partners, Inc. | 9,896 | $14.2K | 0.00% | 00.0% | Unchanged |
| Hunter Perkins Capital Management, LLC | 10,000 | $14.0K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 8,959 | $12.8K | 0.00% | +4,596+105.3% | Added |
| STRS Ohio | 8,700 | $12.4K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 8,992 | $12.0K | 0.00% | −2,463−21.5% | Reduced |
| California State Teachers Retirement System | 8,220 | $11.8K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 4,117 | $6.18K | 0.00% | +4,117 | New |
| Smartleaf Asset Management LLC | 4,013 | $5.70K | 0.00% | −1,239−23.6% | Reduced |
| Nisa Investment Advisors, LLC | 3,622 | $5.18K | 0.00% | +491+15.7% | Added |
| Amalgamated Bank | 3,769 | $5.00K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 3,432 | $4.91K | 0.00% | 00.0% | Unchanged |
| Picton Mahoney Asset Management | 2,871 | $4.00K | 0.00% | +377+15.1% | Added |
| GF Fund Management Co. Ltd. | 2,594 | $3.71K | 0.00% | +2,594 | New |
| Skopos Labs, Inc. | 2,517 | $3.60K | 0.00% | +2,517 | New |
| Point72 (DIFC) Ltd | 2,203 | $3.15K | 0.00% | +2,203 | New |
| Sterling Capital Management LLC | 1,900 | $2.72K | 0.00% | +1,666+712.0% | Added |
| R Squared Ltd | 1,060 | $1.52K | 0.00% | +1,060 | New |
| Optiver Holding B.V. | 705 | $1.01K | 0.00% | +705 | New |
| Signaturefd, LLC | 286 | $409 | 0.00% | +286 | New |
| SBI Securities Co., Ltd. | 218 | $312 | 0.00% | +218 | New |
| The PNC Financial Services Group, Inc. | 200 | $286 | 0.00% | 00.0% | Unchanged |
| North Star Investment Management Corp. | 150 | $214 | 0.00% | 00.0% | Unchanged |
| Frazier Financial Advisors, LLC | 5 | $8 | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 2 | $3 | 0.00% | +2 | New |
| Farther Finance Advisors, LLC | 1 | $1 | 0.00% | 00.0% | Unchanged |
| Point72 Asia (Singapore) Pte. Ltd. | 1 | $1 | 0.00% | +1 | New |
| CWM, LLC | 180 | $0 | 0.00% | +55+44.0% | Added |
| Boxer Capital, LLC | 0 | $0 | 0.00% | −1,817,000−100.0% | Sold out |
| Silverarc Capital Management, LLC | 0 | $0 | 0.00% | −1,585,786−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −535,819−100.0% | Sold out |
| Susquehanna Portfolio Strategies, LLC | 0 | $0 | 0.00% | −82,713−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −72,844−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −24,394−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −18,095−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −10,200−100.0% | Sold out |
| Catalyst Funds Management Pty Ltd | 0 | $0 | 0.00% | −1,700−100.0% | Sold out |
| Nordwand Advisors, LLC | 0 | $0 | 0.00% | −1,500−100.0% | Sold out |
| Jones Financial Companies LLLP | 0 | $0 | 0.00% | −200−100.0% | Sold out |
| Capital Performance Advisors LLP | 0 | $0 | 0.00% | −11−100.0% | Sold out |
| ClariVest Asset Management LLC | – | – | – | – | Not filed |
| Prio Wealth Limited Partnership | – | – | – | – | Not filed |