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, Q2 2024
Institutional positions in Mersana Therapeutics, Inc. as of Jun 30, 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
- 122
- −3 vs. Q1 2024
- Shares held
- 114.2M
- −3.29M (−2.8%) vs. Q1 2024
- Total value
- $229.6M
- −$296.8M (−56.4%) vs. Q1 2024
- New holders
- 19
- 45 more added
- Sold out
- 22
- 36 more reduced
Compare with Q1 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, Q2 2024
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q1 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| CWM, LLC | 49 | $0 | 0.00% | +44+880.0% | Added |
| Farther Finance Advisors, LLC | 1 | $2 | 0.00% | 00.0% | Unchanged |
| Frazier Financial Advisors, LLC | 5 | $11 | 0.00% | 00.0% | Unchanged |
| North Star Investment Management Corp. | 150 | $302 | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 200 | $402 | 0.00% | 00.0% | Unchanged |
| Picton Mahoney Asset Management | 670 | $1.00K | 0.00% | +670 | New |
| Nordwand Advisors, LLC | 1,500 | $3.02K | 0.00% | +1,500 | New |
| Optiver Holding B.V. | 1,586 | $3.19K | 0.00% | +1,586 | New |
| Catalyst Funds Management Pty Ltd | 1,700 | $3.42K | 0.00% | +1,700 | New |
| Smartleaf Asset Management LLC | 1,911 | $3.81K | 0.00% | +1,911 | New |
| Advisor Group Holdings, Inc. | 3,476 | $6.99K | 0.00% | −302−8.0% | Reduced |
| Amalgamated Bank | 3,769 | $8.00K | 0.00% | 00.0% | Unchanged |
| California State Teachers Retirement System | 8,220 | $16.5K | 0.00% | −2,925−26.2% | Reduced |
| STRS Ohio | 8,700 | $17.5K | 0.00% | +6,300+262.5% | Added |
| State of Wyoming | 9,158 | $18.4K | 0.00% | +9,158 | New |
| Russell Investments Group, Ltd. | 9,516 | $19.1K | 0.00% | +63+0.7% | Added |
| Ameritas Investment Partners, Inc. | 9,896 | $19.9K | 0.00% | 00.0% | Unchanged |
| Hunter Perkins Capital Management, LLC | 10,000 | $20.0K | 0.00% | −5,000−33.3% | Reduced |
| Caption Management, LLC | 10,200 | $20.5K | 0.00% | +10,200 | New |
| Royal Bank of Canada | 10,670 | $21.0K | 0.00% | +8,122+318.8% | Added |
| Verition Fund Management LLC | 11,049 | $22.2K | 0.00% | −553,114−98.0% | Reduced |
| Legal & General Group Plc | 11,097 | $22.3K | 0.00% | 00.0% | Unchanged |
| Victory Capital Management Inc | 11,873 | $23.9K | 0.00% | −214−1.8% | Reduced |
| HSBC Holdings PLC | 12,526 | $24.9K | 0.00% | −82−0.7% | Reduced |
| Dimensional Fund Advisors LP | 13,703 | $27.5K | 0.00% | −17,540−56.1% | Reduced |
| ProShare Advisors LLC | 14,850 | $29.8K | 0.00% | −5,069−25.4% | Reduced |
| Grimes & Company, Inc. | 14,998 | $30.1K | 0.00% | −349−2.3% | Reduced |
| Prudential Financial Inc | 17,335 | $34.8K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 17,800 | $35.8K | 0.00% | +64+0.4% | Added |
| Principal Financial Group Inc | 18,278 | $36.7K | 0.00% | −13,497−42.5% | Reduced |
| AJOVista, LLC | 20,463 | $41.1K | 0.12% | +20,463 | New |
| Public Employees Retirement System of Ohio | 20,587 | $41.4K | 0.00% | +20,587 | New |
| Jasper Ridge Partners, L.P. | 23,100 | $46.4K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 23,470 | $47.2K | 0.00% | +23,470 | New |
| Prio Wealth Limited Partnership | 23,529 | $47.3K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 25,566 | $51.4K | 0.00% | −389,282−93.8% | Reduced |
| State Board of Administration of Florida Retirement System | 28,800 | $57.9K | 0.00% | +1,398+5.1% | Added |
| Walleye Trading LLC | 31,526 | $63.4K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 34,983 | $70.3K | 0.00% | −254,684−87.9% | Reduced |
| New York State Common Retirement Fund | 37,235 | $74.8K | 0.00% | +80+0.2% | Added |
| Simplex Trading, LLC | 38,661 | $77.0K | 0.00% | +30,621+380.9% | Added |
| Voya Investment Management LLC | 38,588 | $77.6K | 0.00% | +2,061+5.6% | Added |
| Tower Research Capital LLC (TRC) | 40,760 | $81.9K | 0.00% | +39,940+4,870.7% | Added |
| Exchange Traded Concepts, LLC | 43,420 | $87.3K | 0.00% | −13,510−23.7% | Reduced |
| Algert Global LLC | 44,655 | $89.8K | 0.00% | +44,655 | New |
| Invesco Ltd. | 45,056 | $90.6K | 0.00% | −279,354−86.1% | Reduced |
| Ameriprise Financial Inc | 45,547 | $91.5K | 0.00% | +27,637+154.3% | Added |
| Manufacturers Life Insurance Company, The | 46,487 | $93.4K | 0.00% | +4,370+10.4% | Added |
| Y-Intercept (Hong Kong) Ltd | 46,779 | $94.0K | 0.01% | +46,779 | New |
| Wells Fargo & Company | 47,270 | $95.0K | 0.00% | +9,645+25.6% | Added |
| Aigen Investment Management, LP | 50,083 | $100.7K | 0.02% | +25,553+104.2% | Added |
| Graham Capital Management, L.P. | 50,970 | $102.5K | 0.00% | +50,970 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 56,945 | $114.5K | 0.00% | +56,945 | New |
| Gsa Capital Partners LLP | 57,960 | $116.0K | 0.01% | +22,705+64.4% | Added |
| Corebridge Financial, Inc. | 61,030 | $122.7K | 0.00% | +61,030 | New |
| QVT Financial LP | 62,657 | $125.9K | 0.01% | 00.0% | Unchanged |
| MetLife Investment Management | 65,583 | $131.8K | 0.00% | +15,684+31.4% | Added |
| Acadian Asset Management LLC | 71,506 | $143.0K | 0.00% | −397,417−84.8% | Reduced |
| Jump Financial, LLC | 80,562 | $161.9K | 0.00% | +64,301+395.4% | Added |
| State of Wisconsin Investment Board | 83,600 | $168.0K | 0.00% | −22,900−21.5% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 93,878 | $188.7K | 0.01% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 99,078 | $200.0K | 0.00% | +19,146+24.0% | Added |
| ExodusPoint Capital Management, LP | 107,174 | $215.0K | 0.00% | +107,174 | New |
| Susquehanna International Group, LLP | 108,859 | $218.8K | 0.00% | +13,377+14.0% | Added |
| Superstring Capital Management LP | 110,073 | $221.2K | 0.28% | +110,073 | New |
| XTX Topco Ltd | 121,432 | $244.1K | 0.02% | +87,893+262.1% | Added |
| Nuveen Asset Management, LLC | 123,339 | $247.9K | 0.00% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 138,722 | $279.0K | 0.00% | +105,209+313.9% | Added |
| Macquarie Group Ltd | 150,000 | $302.0K | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 159,773 | $321.1K | 0.00% | −49,790−23.8% | Reduced |
| Los Angeles Capital Management LLC | 175,420 | $352.6K | 0.00% | −21,743−11.0% | Reduced |
| Marshall Wace, LLP | 176,029 | $353.8K | 0.00% | +137,596+358.0% | Added |
| Rhumbline Advisers | 176,063 | $353.9K | 0.00% | −2,890−1.6% | Reduced |
| HealthInvest Partners AB | 184,900 | $371.6K | 0.23% | +84,900+84.9% | Added |
| Federated Hermes, Inc. | 185,507 | $372.9K | 0.00% | +185,331+105,301.7% | Added |
| Alliancebernstein L.P. | 186,060 | $374.0K | 0.00% | +17,250+10.2% | Added |
| Panagora Asset Management Inc | 236,225 | $474.8K | 0.00% | +183+0.1% | Added |
| FMR LLC | 245,408 | $493.3K | 0.00% | −80,189−24.6% | Reduced |
| Squarepoint Ops LLC | 252,804 | $508.1K | 0.00% | +252,804 | New |
| HRT Financial LP | 259,689 | $521.0K | 0.00% | +259,689 | New |
| Susquehanna Fundamental Investments, LLC | 308,691 | $620.5K | 0.01% | +74,575+31.9% | Added |
| Charles Schwab Investment Management Inc | 312,630 | $628.4K | 0.00% | +16,758+5.7% | Added |
| Jane Street Group, LLC | 317,332 | $637.8K | 0.00% | −53,301−14.4% | Reduced |
| BNP Paribas Arbitrage, SA | 336,079 | $675.5K | 0.00% | +255,344+316.3% | Added |
| Atom Investors LP | 365,435 | $734.5K | 0.07% | −73,797−16.8% | Reduced |
| Barclays PLC | 372,717 | $749.2K | 0.00% | −36,501−8.9% | Reduced |
| Bank of New York Mellon Corp | 452,829 | $910.2K | 0.00% | +74,092+19.6% | Added |
| Bridgeway Capital Management, LLC | 475,500 | $955.8K | 0.02% | +243,200+104.7% | Added |
| Jacobs Levy Equity Management, Inc | 485,593 | $976.0K | 0.00% | −324,286−40.0% | Reduced |
| ClariVest Asset Management LLC | 500,498 | $1.01M | 0.10% | +28,650+6.1% | Added |
| Wellington Management Group LLP | 532,866 | $1.07M | 0.00% | −1,752−0.3% | Reduced |
| UBS Oconnor LLC | 544,293 | $1.09M | 0.03% | +110,000+25.3% | Added |
| Millennium Management LLC | 691,785 | $1.39M | 0.00% | −815,795−54.1% | Reduced |
| Two Sigma Advisers, LP | 719,300 | $1.45M | 0.00% | +563,500+361.7% | Added |
| Two Sigma Investments, LP | 748,690 | $1.50M | 0.00% | +530,745+243.5% | Added |
| Affinity Asset Advisors, LLC | 767,000 | $1.54M | 0.24% | −233,000−23.3% | Reduced |
| Northern Trust Corp | 900,621 | $1.81M | 0.00% | −44,550−4.7% | Reduced |
| Octagon Capital Advisors LP | 992,000 | $1.99M | 0.33% | −8,000−0.8% | Reduced |
| Qube Research & Technologies Ltd | 992,565 | $2.00M | 0.00% | +32,870+3.4% | Added |
| Baker Bros. Advisors LP | 1,086,115 | $2.18M | 0.03% | 00.0% | Unchanged |