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, Q1 2022
Institutional positions in Mersana Therapeutics, Inc. as of Mar 31, 2022. 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
- 128
- +6 vs. Q4 2021
- Shares held
- 80.9M
- +10.7M (+15.2%) vs. Q4 2021
- Total value
- $322.7M
- −$113.9M (−26.1%) vs. Q4 2021
- New holders
- 21
- 49 more added
- Sold out
- 15
- 38 more reduced
Compare with Q4 2021: 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, Q1 2022
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q4 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Citadel Advisors LLC | 686,689 | $2.74M | 0.00% | +378,182+122.6% | Added |
| Opaleye Management Inc. | 710,000 | $2.83M | 0.88% | +710,000 | New |
| Federated Hermes, Inc. | 723,933 | $2.89M | 0.01% | +521,350+257.4% | Added |
| Northern Trust Corp | 724,255 | $2.89M | 0.00% | −23,621−3.2% | Reduced |
| Rho Capital Partners Inc | 796,458 | $3.18M | 2.20% | 00.0% | Unchanged |
| Decheng Capital Management III (Cayman), LLC | 904,268 | $3.61M | 1.11% | +904,268 | New |
| Renaissance Technologies LLC | 919,200 | $3.67M | 0.00% | +576,600+168.3% | Added |
| CIBC Asset Management Inc | 1,055,994 | $4.21M | 0.01% | 00.0% | Unchanged |
| Deutsche Bank AG | 1,155,677 | $4.61M | 0.00% | +1,078,665+1,400.6% | Added |
| Geode Capital Management, LLC | 1,166,807 | $4.66M | 0.00% | +29,806+2.6% | Added |
| Bank of Montreal | 1,157,635 | $4.67M | 0.00% | +1,157,635 | New |
| Two Sigma Investments, LP | 1,275,634 | $5.09M | 0.02% | +397,882+45.3% | Added |
| Two Sigma Advisers, LP | 1,349,500 | $5.38M | 0.01% | +299,300+28.5% | Added |
| State Street Corp | 1,352,150 | $5.39M | 0.00% | −2,868,407−68.0% | Reduced |
| Goldman Sachs Group Inc | 1,650,752 | $6.59M | 0.00% | +441,140+36.5% | Added |
| Candriam Luxembourg S.C.A. | 1,844,823 | $7.36M | 0.05% | −178,072−8.8% | Reduced |
| D. E. Shaw & Co., Inc. | 2,090,866 | $8.34M | 0.01% | +1,445,963+224.2% | Added |
| Morgan Stanley | 2,171,373 | $8.66M | 0.00% | +942,766+76.7% | Added |
| Artal Group S.A. | 2,200,000 | $8.78M | 0.37% | +1,000,000+83.3% | Added |
| Vanguard Group Inc | 3,435,270 | $13.7M | 0.00% | −172,161−4.8% | Reduced |
| Rock Springs Capital Management LP | 3,755,820 | $15.0M | 0.38% | +506,870+15.6% | Added |
| Bellevue Group AG | 3,954,000 | $15.8M | 0.18% | −210,000−5.0% | Reduced |
| Sarissa Capital Management LP | 4,299,297 | $17.2M | 1.62% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 4,788,900 | $19.1M | 0.31% | +1,900,053+65.8% | Added |
| Millennium Management LLC | 4,883,749 | $19.5M | 0.02% | +4,247,665+667.8% | Added |
| Bain Capital Life Sciences Investors, LLC | 6,522,030 | $26.0M | 2.53% | +1,136,363+21.1% | Added |
| Avoro Capital Advisors LLC | 6,800,000 | $27.1M | 0.50% | 00.0% | Unchanged |
| BlackRock Inc. | 7,626,196 | $30.4M | 0.00% | +146,967+2.0% | Added |
| Assenagon Asset Management S.A. | 0 | $0 | 0.00% | −1,073,748−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −818,100−100.0% | Sold out |
| Rafferty Asset Management, LLC | 0 | $0 | 0.00% | −278,798−100.0% | Sold out |
| Nomura Holdings Inc | 0 | $0 | 0.00% | −97,865−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −84,616−100.0% | Sold out |
| Teachers Retirement System of the State of Kentucky | 0 | $0 | 0.00% | −47,980−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −41,317−100.0% | Sold out |
| Algert Global LLC | 0 | $0 | 0.00% | −25,102−100.0% | Sold out |
| Truist Financial Corp | 0 | $0 | 0.00% | −16,700−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −16,263−100.0% | Sold out |
| Bridgefront Capital, LLC | 0 | $0 | 0.00% | −15,622−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −7,421−100.0% | Sold out |
| Parallel Advisors, LLC | 0 | $0 | 0.00% | −1,276−100.0% | Sold out |
| The PNC Financial Services Group, Inc. | 0 | $0 | 0.00% | −478−100.0% | Sold out |
| CWM, LLC | 0 | $0 | 0.00% | −109−100.0% | Sold out |