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 2024
Institutional positions in Mersana Therapeutics, Inc. as of Mar 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
- 125
- +19 vs. Q4 2023
- Shares held
- 117.5M
- +4.20M (+3.7%) vs. Q4 2023
- Total value
- $526.3M
- +$263.3M (+100.1%) vs. Q4 2023
- New holders
- 38
- 33 more added
- Sold out
- 19
- 37 more reduced
Compare with Q4 2023: 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 2024
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q4 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| CWM, LLC | 5 | $0 | 0.00% | +5 | New |
| Farther Finance Advisors, LLC | 1 | $4 | 0.00% | 00.0% | Unchanged |
| Frazier Financial Advisors, LLC | 5 | $23 | 0.00% | +5 | New |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 22 | $98 | 0.00% | +22 | New |
| North Star Investment Management Corp. | 150 | $672 | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 176 | $788 | 0.00% | +176 | New |
| The PNC Financial Services Group, Inc. | 200 | $896 | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 820 | $3.67K | 0.00% | −23,713−96.7% | Reduced |
| Pacer Advisors, Inc. | 1,716 | $7.69K | 0.00% | +1,716 | New |
| STRS Ohio | 2,400 | $10.0K | 0.00% | −100−4.0% | Reduced |
| Royal Bank of Canada | 2,548 | $11.0K | 0.00% | −32,315−92.7% | Reduced |
| Advisor Group Holdings, Inc. | 3,778 | $16.9K | 0.00% | −57−1.5% | Reduced |
| Amalgamated Bank | 3,769 | $17.0K | 0.00% | −7,997−68.0% | Reduced |
| Metropolitan Life Insurance Co | 4,677 | $21.0K | 0.00% | +3,119+200.2% | Added |
| Simplex Trading, LLC | 8,040 | $36.0K | 0.00% | +2,223+38.2% | Added |
| Russell Investments Group, Ltd. | 9,453 | $42.4K | 0.00% | +8,575+976.7% | Added |
| Ameritas Investment Partners, Inc. | 9,896 | $44.3K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 11,097 | $49.7K | 0.00% | −18,430−62.4% | Reduced |
| California State Teachers Retirement System | 11,145 | $49.9K | 0.00% | −7,104−38.9% | Reduced |
| Inceptionr LLC | 11,188 | $50.1K | 0.01% | +11,188 | New |
| Victory Capital Management Inc | 12,087 | $54.1K | 0.00% | −645−5.1% | Reduced |
| Fox Run Management, L.L.C. | 12,261 | $54.9K | 0.01% | +12,261 | New |
| HSBC Holdings PLC | 12,608 | $56.5K | 0.00% | +12,608 | New |
| Mackenzie Financial Corp | 13,819 | $61.9K | 0.00% | +13,819 | New |
| Hunter Perkins Capital Management, LLC | 15,000 | $67.0K | 0.01% | −10,700−41.6% | Reduced |
| Grimes & Company, Inc. | 15,347 | $68.8K | 0.00% | −315−2.0% | Reduced |
| Jump Financial, LLC | 16,261 | $72.8K | 0.00% | +16,261 | New |
| Oxford Asset Management LLP | 16,586 | $74.3K | 0.08% | +16,586 | New |
| Prudential Financial Inc | 17,335 | $77.7K | 0.00% | +17,335 | New |
| E Fund Management Co., Ltd. | 17,411 | $78.0K | 0.00% | +17,411 | New |
| Nisa Investment Advisors, LLC | 17,736 | $79.5K | 0.00% | +93+0.5% | Added |
| Ameriprise Financial Inc | 17,910 | $80.2K | 0.00% | −23,094−56.3% | Reduced |
| NEOS Investment Management LLC | 19,465 | $87.2K | 0.01% | +19,465 | New |
| ProShare Advisors LLC | 19,919 | $89.2K | 0.00% | +1,569+8.6% | Added |
| Jasper Ridge Partners, L.P. | 23,100 | $103.5K | 0.00% | 00.0% | Unchanged |
| Prio Wealth Limited Partnership | 23,529 | $105.4K | 0.00% | 00.0% | Unchanged |
| Aigen Investment Management, LP | 24,530 | $109.9K | 0.02% | +24,530 | New |
| State Board of Administration of Florida Retirement System | 27,402 | $112.6K | 0.00% | −1,398−4.9% | Reduced |
| Dimensional Fund Advisors LP | 31,243 | $140.0K | 0.00% | −70,422−69.3% | Reduced |
| Walleye Trading LLC | 31,526 | $141.2K | 0.00% | +31,526 | New |
| Principal Financial Group Inc | 31,775 | $142.4K | 0.00% | −1,702−5.1% | Reduced |
| SG Americas Securities, LLC | 33,513 | $150.0K | 0.00% | −5,713−14.6% | Reduced |
| XTX Topco Ltd | 33,539 | $150.3K | 0.02% | +33,539 | New |
| Gsa Capital Partners LLP | 35,255 | $158.0K | 0.01% | +35,255 | New |
| Voya Investment Management LLC | 36,527 | $163.6K | 0.00% | −9,506−20.7% | Reduced |
| New York State Common Retirement Fund | 37,155 | $166.5K | 0.00% | −94−0.3% | Reduced |
| Wells Fargo & Company | 37,625 | $168.6K | 0.00% | +6,794+22.0% | Added |
| Marshall Wace, LLP | 38,433 | $172.2K | 0.00% | −119,367−75.6% | Reduced |
| Manufacturers Life Insurance Company, The | 42,117 | $188.7K | 0.00% | +460+1.1% | Added |
| MetLife Investment Management | 49,899 | $223.5K | 0.00% | +3,257+7.0% | Added |
| Mirae Asset Global Investments Co., Ltd. | 54,127 | $226.2K | 0.00% | +54,127 | New |
| American International Group, Inc. | 54,639 | $244.8K | 0.00% | −469−0.9% | Reduced |
| Exchange Traded Concepts, LLC | 56,930 | $255.0K | 0.01% | −41,799−42.3% | Reduced |
| Deerfield Management Company, L.P. (Series C) | 57,478 | $257.5K | 0.00% | +57,478 | New |
| Profund Advisors LLC | 58,220 | $260.8K | 0.01% | +58,220 | New |
| QVT Financial LP | 62,657 | $282.9K | 0.03% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 79,932 | $359.0K | 0.00% | +4,962+6.6% | Added |
| BNP Paribas Arbitrage, SA | 80,735 | $361.7K | 0.00% | +38,239+90.0% | Added |
| Susquehanna Portfolio Strategies, LLC | 93,878 | $420.6K | 0.01% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 95,482 | $427.8K | 0.00% | −57,299−37.5% | Reduced |
| HealthInvest Partners AB | 100,000 | $448.0K | 0.27% | +100,000 | New |
| State of Wisconsin Investment Board | 106,500 | $477.1K | 0.00% | +106,500 | New |
| HighVista Strategies LLC | 122,315 | $548.0K | 0.20% | +122,315 | New |
| Nuveen Asset Management, LLC | 123,339 | $552.6K | 0.00% | +57,458+87.2% | Added |
| Lighthouse Investment Partners, LLC | 129,515 | $580.2K | 0.03% | +129,515 | New |
| Macquarie Group Ltd | 150,000 | $672.0K | 0.00% | 00.0% | Unchanged |
| Two Sigma Advisers, LP | 155,800 | $698.0K | 0.00% | +4,400+2.9% | Added |
| Alliancebernstein L.P. | 168,810 | $756.3K | 0.00% | +50,630+42.8% | Added |
| Rhumbline Advisers | 178,953 | $801.7K | 0.00% | +18,882+11.8% | Added |
| Los Angeles Capital Management LLC | 197,163 | $883.3K | 0.00% | −307−0.2% | Reduced |
| Canada Pension Plan Investment Board | 204,900 | $918.0K | 0.00% | +204,900 | New |
| Bank of America Corp | 209,563 | $938.8K | 0.00% | +47,499+29.3% | Added |
| Two Sigma Investments, LP | 217,945 | $976.4K | 0.00% | +46,600+27.2% | Added |
| Bridgeway Capital Management, LLC | 232,300 | $1.04M | 0.02% | 00.0% | Unchanged |
| Susquehanna Fundamental Investments, LLC | 234,116 | $1.05M | 0.05% | +234,116 | New |
| Panagora Asset Management Inc | 236,042 | $1.06M | 0.01% | −15,340−6.1% | Reduced |
| Cubist Systematic Strategies, LLC | 239,143 | $1.07M | 0.01% | +123,487+106.8% | Added |
| UBS Group AG | 289,667 | $1.30M | 0.00% | +136,391+89.0% | Added |
| Charles Schwab Investment Management Inc | 295,872 | $1.33M | 0.00% | −12,200−4.0% | Reduced |
| Monashee Investment Management LLC | 310,000 | $1.39M | 0.16% | +310,000 | New |
| Invesco Ltd. | 324,410 | $1.45M | 0.00% | +275,680+565.7% | Added |
| FMR LLC | 325,597 | $1.46M | 0.00% | −210,031−39.2% | Reduced |
| Rafferty Asset Management, LLC | 368,434 | $1.65M | 0.01% | +368,434 | New |
| Jane Street Group, LLC | 370,633 | $1.66M | 0.00% | −390−0.1% | Reduced |
| Bank of New York Mellon Corp | 378,737 | $1.70M | 0.00% | −7,922−2.0% | Reduced |
| Barclays PLC | 409,218 | $1.83M | 0.00% | +257,154+169.1% | Added |
| Citigroup Inc | 414,848 | $1.86M | 0.00% | +398,874+2,497.0% | Added |
| UBS Oconnor LLC | 434,293 | $1.95M | 0.06% | −121,352−21.8% | Reduced |
| Atom Investors LP | 439,232 | $1.97M | 0.25% | −335,427−43.3% | Reduced |
| Acadian Asset Management LLC | 468,923 | $2.10M | 0.01% | +293,115+166.7% | Added |
| ClariVest Asset Management LLC | 471,848 | $2.11M | 0.22% | +471,848 | New |
| Wellington Management Group LLP | 534,618 | $2.40M | 0.00% | +534,618 | New |
| Verition Fund Management LLC | 564,163 | $2.53M | 0.02% | +564,163 | New |
| Deep Track Capital, LP | 579,674 | $2.60M | 0.07% | +579,674 | New |
| Goldman Sachs Group Inc | 672,607 | $3.01M | 0.00% | +527,042+362.1% | Added |
| Ally Bridge Group (NY) LLC | 801,437 | $3.59M | 2.00% | +801,437 | New |
| Jacobs Levy Equity Management, Inc | 809,879 | $3.63M | 0.02% | −120,728−13.0% | Reduced |
| Northern Trust Corp | 945,171 | $4.23M | 0.00% | +13,765+1.5% | Added |
| Qube Research & Technologies Ltd | 959,695 | $4.30M | 0.01% | +959,695 | New |
| Affinity Asset Advisors, LLC | 1,000,000 | $4.48M | 0.73% | 00.0% | Unchanged |