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 2025
Institutional positions in Mersana Therapeutics, Inc. as of Jun 30, 2025. 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
- 85
- −26 vs. Q1 2025
- Shares held
- 77.4M
- −10.4M (−11.9%) vs. Q1 2025
- Total value
- $22.9M
- −$7.31M (−24.2%) vs. Q1 2025
- New holders
- 14
- 23 more added
- Sold out
- 40
- 30 more reduced
Compare with Q1 2025: 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 2025
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Royal Bank of Canada | 150 | $0 | 0.00% | −1,468−90.7% | Reduced |
| Caitong International Asset Management Co., Ltd | 1 | $0 | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 1 | $0 | 0.00% | 00.0% | Unchanged |
| North Star Investment Management Corp. | 150 | $44 | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 677 | $201 | 0.00% | +677 | New |
| Huntington National Bank | 800 | $237 | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 893 | $264 | 0.00% | −2,644−74.8% | Reduced |
| Nisa Investment Advisors, LLC | 1,050 | $311 | 0.00% | −250−19.2% | Reduced |
| SBI Securities Co., Ltd. | 1,368 | $405 | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 2,312 | $684 | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 2,598 | $754 | 0.00% | −736−22.1% | Reduced |
| GF Fund Management Co. Ltd. | 2,594 | $768 | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 2,765 | $818 | 0.00% | −198,683−98.6% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 4,814 | $1.43K | 0.00% | +680+16.4% | Added |
| Essential Partners LLC | 5,405 | $1.60K | 0.00% | +5,405 | New |
| EverSource Wealth Advisors, LLC | 5,494 | $1.63K | 0.00% | +2,796+103.6% | Added |
| Barclays PLC | 9,767 | $2.89K | 0.00% | −111,958−92.0% | Reduced |
| Hunter Perkins Capital Management, LLC | 10,000 | $3.00K | 0.00% | 00.0% | Unchanged |
| ExodusPoint Capital Management, LP | 11,434 | $3.00K | 0.00% | +11,434 | New |
| Jump Financial, LLC | 11,323 | $3.35K | 0.00% | +11,323 | New |
| Prudential Financial Inc | 14,900 | $4.40K | 0.00% | −46,635−75.8% | Reduced |
| Parcion Private Wealth LLC | 16,233 | $4.80K | 0.00% | +941+6.2% | Added |
| Two Sigma Securities, LLC | 17,566 | $5.20K | 0.00% | +17,566 | New |
| Bank of America Corp | 20,083 | $5.95K | 0.00% | −294,288−93.6% | Reduced |
| Wells Fargo & Company | 23,014 | $6.81K | 0.00% | −55,474−70.7% | Reduced |
| Jasper Ridge Partners, L.P. | 23,100 | $6.84K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 25,032 | $7.41K | 0.00% | +253+1.0% | Added |
| HSBC Holdings PLC | 30,500 | $8.78K | 0.00% | +18,006+144.1% | Added |
| Colony Group, LLC | 30,976 | $9.17K | 0.00% | +447+1.5% | Added |
| Mariner, LLC | 31,213 | $9.24K | 0.00% | +10,463+50.4% | Added |
| Walleye Trading LLC | 31,526 | $9.33K | 0.00% | 00.0% | Unchanged |
| Merit Financial Group, LLC | 31,588 | $9.35K | 0.00% | −10,316−24.6% | Reduced |
| Tower Research Capital LLC (TRC) | 31,684 | $9.38K | 0.00% | +5,519+21.1% | Added |
| Group One Trading, L.P. | 34,856 | $10.3K | 0.00% | +14,756+73.4% | Added |
| JustInvest LLC | 36,692 | $10.9K | 0.00% | −5,946−13.9% | Reduced |
| Captrust Financial Advisors | 41,746 | $12.4K | 0.00% | +10,612+34.1% | Added |
| R Squared Ltd | 47,229 | $14.0K | 0.01% | +47,229 | New |
| Callan Family Office, LLC | 56,559 | $16.7K | 0.00% | +56,559 | New |
| QVT Financial LP | 62,657 | $18.5K | 0.00% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 66,577 | $19.7K | 0.00% | −279,611−80.8% | Reduced |
| Citigroup Inc | 72,997 | $21.6K | 0.00% | −8,628−10.6% | Reduced |
| Point72 Asia (Singapore) Pte. Ltd. | 75,151 | $22.2K | 0.00% | +75,151 | New |
| HRT Financial LP | 93,373 | $27.0K | 0.00% | +46,876+100.8% | Added |
| Jain Global LLC | 96,154 | $28.5K | 0.00% | +96,154 | New |
| Pallas Capital Advisors LLC | 96,709 | $28.6K | 0.00% | +2,178+2.3% | Added |
| Algert Global LLC | 101,313 | $30.0K | 0.00% | −33,700−25.0% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 126,729 | $36.7K | 0.00% | −3,971−3.0% | Reduced |
| JPMorgan Chase & Co | 130,094 | $38.5K | 0.00% | +79,390+156.6% | Added |
| FMR LLC | 138,520 | $41.0K | 0.00% | −32,560−19.0% | Reduced |
| Macquarie Group Ltd | 150,000 | $44.0K | 0.00% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 152,877 | $45.3K | 0.00% | −1,021,720−87.0% | Reduced |
| CWM, LLC | 165,404 | $49.0K | 0.00% | −19,421−10.5% | Reduced |
| Northern Trust Corp | 222,694 | $65.9K | 0.00% | −642,093−74.2% | Reduced |
| Marshall Wace, LLP | 226,971 | $68.1K | 0.00% | +226,971 | New |
| Deutsche Bank AG | 305,070 | $91.5K | 0.00% | −534,654−63.7% | Reduced |
| Cerity Partners LLC | 320,805 | $95.0K | 0.00% | +76,570+31.4% | Added |
| Morgan Stanley | 357,597 | $105.8K | 0.00% | +50,467+16.4% | Added |
| Susquehanna International Group, LLP | 449,369 | $133.0K | 0.00% | +208,296+86.4% | Added |
| State Street Corp | 452,110 | $133.8K | 0.00% | −2,151,758−82.6% | Reduced |
| Gsa Capital Partners LLP | 471,681 | $140.0K | 0.01% | +471,681 | New |
| Jane Street Group, LLC | 511,182 | $151.3K | 0.00% | +511,182 | New |
| Alamea Verwaltungs GmbH | 604,213 | $178.8K | 0.13% | 00.0% | Unchanged |
| Ieq Capital, LLC | 638,452 | $189.0K | 0.00% | −68,569−9.7% | Reduced |
| Lion Point Capital, LP | 644,000 | $190.6K | 1.29% | 00.0% | Unchanged |
| UBS Group AG | 775,501 | $229.5K | 0.00% | +455,696+142.5% | Added |
| Two Sigma Investments, LP | 823,269 | $243.7K | 0.00% | +769,617+1,434.5% | Added |
| Two Sigma Advisers, LP | 937,000 | $277.4K | 0.00% | +678,800+262.9% | Added |
| Luminus Management LLC | 1,039,314 | $307.6K | 0.08% | +1,039,314 | New |
| Geode Capital Management, LLC | 1,049,205 | $310.7K | 0.00% | −1,393,123−57.0% | Reduced |
| 5AM Venture Management, LLC | 1,305,000 | $386.3K | 0.15% | 00.0% | Unchanged |
| Jacobs Levy Equity Management, Inc | 1,332,945 | $394.6K | 0.00% | −1790.0% | Reduced |
| Goldman Sachs Group Inc | 1,433,760 | $424.4K | 0.00% | +847,102+144.4% | Added |
| Catalio Capital Management, LP | 1,567,413 | $464.0K | 0.10% | −137,623−8.1% | Reduced |
| 683 Capital Management, LLC | 1,990,000 | $589.0K | 0.06% | +340,000+20.6% | Added |
| Millennium Management LLC | 2,090,235 | $618.7K | 0.00% | +2,090,235 | New |
| Renaissance Technologies LLC | 2,850,194 | $843.7K | 0.00% | +2,010,275+239.3% | Added |
| Acadian Asset Management LLC | 2,955,280 | $873.0K | 0.00% | −34,379−1.1% | Reduced |
| Silverarc Capital Management, LLC | 3,128,421 | $926.0K | 0.19% | +39,916+1.3% | Added |
| BlackRock, Inc. | 3,763,419 | $1.11M | 0.00% | −4,562,763−54.8% | Reduced |
| Rock Springs Capital Management LP | 3,814,684 | $1.13M | 0.07% | 00.0% | Unchanged |
| AQR Capital Management LLC | 5,129,685 | $1.52M | 0.00% | −14,064−0.3% | Reduced |
| Schonfeld Strategic Advisors LLC | 5,673,852 | $1.68M | 0.01% | −1,940,212−25.5% | Reduced |
| Vanguard Group Inc | 7,678,391 | $2.27M | 0.00% | −699,376−8.3% | Reduced |
| Bain Capital Life Sciences Investors, LLC | 8,663,673 | $2.56M | 0.32% | 00.0% | Unchanged |
| Nextech Invest, Ltd. | 12,067,246 | $3.57M | 0.68% | 00.0% | Unchanged |
| VR Adviser, LLC | 0 | $0 | 0.00% | −3,574,325−100.0% | Sold out |
| Woodline Partners LP | 0 | $0 | 0.00% | −435,593−100.0% | Sold out |
| Panagora Asset Management Inc | 0 | $0 | 0.00% | −370,448−100.0% | Sold out |
| State of Wyoming | 0 | $0 | 0.00% | −295,498−100.0% | Sold out |
| Charles Schwab Investment Management Inc | 0 | $0 | 0.00% | −280,631−100.0% | Sold out |
| Nuveen, LLC | 0 | $0 | 0.00% | −232,223−100.0% | Sold out |
| Alliancebernstein L.P. | 0 | $0 | 0.00% | −186,060−100.0% | Sold out |
| Rhumbline Advisers | 0 | $0 | 0.00% | −154,163−100.0% | Sold out |
| Invesco Ltd. | 0 | $0 | 0.00% | −114,863−100.0% | Sold out |
| UBS Oconnor LLC | 0 | $0 | 0.00% | −97,731−100.0% | Sold out |
| Intech Investment Management LLC | 0 | $0 | 0.00% | −90,358−100.0% | Sold out |
| SEI Investments Co | 0 | $0 | 0.00% | −69,527−100.0% | Sold out |
| Mirae Asset Global ETFs Holdings Ltd. | 0 | $0 | 0.00% | −68,760−100.0% | Sold out |
| Price T Rowe Associates Inc | 0 | $0 | 0.00% | −62,093−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −52,526−100.0% | Sold out |