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 2022
Institutional positions in Mersana Therapeutics, Inc. as of Jun 30, 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
- 126
- 0 vs. Q1 2022
- Shares held
- 88.3M
- +7.48M (+9.2%) vs. Q1 2022
- Total value
- $408.0M
- +$85.4M (+26.5%) vs. Q1 2022
- New holders
- 19
- 50 more added
- Sold out
- 19
- 36 more reduced
2 institutions that held it in Q1 2022 haven't filed for Q2 2022 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2022: 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 2022
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q1 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| OrbiMed Advisors LLC | 9,011,437 | $41.6M | 0.81% | +4,222,537+88.2% | Added |
| BlackRock Inc. | 8,881,019 | $41.0M | 0.00% | +1,254,823+16.5% | Added |
| Bain Capital Life Sciences Investors, LLC | 8,663,673 | $40.0M | 4.69% | +2,141,643+32.8% | Added |
| Avoro Capital Advisors LLC | 7,550,000 | $34.9M | 0.69% | +750,000+11.0% | Added |
| Vanguard Group Inc | 4,733,731 | $21.9M | 0.00% | +1,298,461+37.8% | Added |
| Millennium Management LLC | 4,382,701 | $20.2M | 0.03% | −501,048−10.3% | Reduced |
| Sarissa Capital Management LP | 4,299,297 | $19.9M | 2.00% | 00.0% | Unchanged |
| Rock Springs Capital Management LP | 4,075,958 | $18.8M | 0.55% | +320,138+8.5% | Added |
| Bellevue Group AG | 3,895,200 | $18.0M | 0.25% | −58,800−1.5% | Reduced |
| Woodline Partners LP | 3,161,576 | $14.6M | 0.24% | +3,161,576 | New |
| Artal Group S.A. | 2,200,000 | $10.2M | 0.57% | 00.0% | Unchanged |
| Candriam Luxembourg S.C.A. | 1,990,559 | $9.20M | 0.08% | +145,736+7.9% | Added |
| D. E. Shaw & Co., Inc. | 1,977,930 | $9.14M | 0.01% | −112,936−5.4% | Reduced |
| Goldman Sachs Group Inc | 1,860,347 | $8.60M | 0.00% | +209,595+12.7% | Added |
| State Street Corp | 1,620,330 | $7.49M | 0.00% | +268,180+19.8% | Added |
| Morgan Stanley | 1,573,704 | $7.27M | 0.00% | −597,669−27.5% | Reduced |
| Geode Capital Management, LLC | 1,571,940 | $7.26M | 0.00% | +405,133+34.7% | Added |
| Deutsche Bank AG | 1,124,715 | $5.20M | 0.00% | −30,962−2.7% | Reduced |
| Two Sigma Advisers, LP | 1,086,700 | $5.02M | 0.01% | −262,800−19.5% | Reduced |
| Opaleye Management Inc. | 1,047,000 | $4.84M | 2.18% | +337,000+47.5% | Added |
| Decheng Capital Management III (Cayman), LLC | 904,268 | $4.18M | 1.58% | 00.0% | Unchanged |
| Northern Trust Corp | 856,486 | $3.96M | 0.00% | +132,231+18.3% | Added |
| Silverarc Capital Management, LLC | 850,000 | $3.93M | 1.84% | +850,000 | New |
| Charles Schwab Investment Management Inc | 656,164 | $3.03M | 0.00% | +191,504+41.2% | Added |
| Renaissance Technologies LLC | 570,319 | $2.63M | 0.00% | −348,881−38.0% | Reduced |
| BNP Paribas Arbitrage, SA | 539,703 | $2.49M | 0.01% | −112,910−17.3% | Reduced |
| Platinum Investment Management Ltd | 495,481 | $2.29M | 0.09% | 00.0% | Unchanged |
| UBS Oconnor LLC | 491,048 | $2.27M | 0.02% | +491,048 | New |
| Wellington Management Group LLP | 480,644 | $2.22M | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 451,139 | $2.08M | 0.00% | +141,510+45.7% | Added |
| Two Sigma Investments, LP | 451,174 | $2.08M | 0.01% | −824,460−64.6% | Reduced |
| Fred Alger Management, LLC | 449,661 | $2.08M | 0.01% | +126,593+39.2% | Added |
| Nuveen Asset Management, LLC | 441,834 | $2.04M | 0.00% | +142,384+47.5% | Added |
| DAFNA Capital Management LLC | 406,763 | $1.88M | 0.51% | +54,000+15.3% | Added |
| Hudson Bay Capital Management LP | 400,000 | $1.85M | 0.02% | −35,000−8.0% | Reduced |
| Citadel Advisors LLC | 351,415 | $1.62M | 0.00% | −335,274−48.8% | Reduced |
| Bank of New York Mellon Corp | 343,712 | $1.59M | 0.00% | +60,617+21.4% | Added |
| EcoR1 Capital, LLC | 310,960 | $1.44M | 0.05% | −15,618−4.8% | Reduced |
| PDT Partners, LLC | 241,899 | $1.12M | 0.10% | −84,520−25.9% | Reduced |
| State of Wisconsin Investment Board | 240,729 | $1.11M | 0.00% | +45,429+23.3% | Added |
| Allianz Asset Management GmbH | 235,225 | $1.09M | 0.00% | +26,705+12.8% | Added |
| Squarepoint Ops LLC | 226,372 | $1.05M | 0.01% | −262,625−53.7% | Reduced |
| Dimensional Fund Advisors LP | 209,060 | $965.0K | 0.00% | +23,020+12.4% | Added |
| Graham Capital Management, L.P. | 203,067 | $938.0K | 0.04% | +203,067 | New |
| Swiss National Bank | 177,996 | $822.0K | 0.00% | +42,000+30.9% | Added |
| Gsa Capital Partners LLP | 168,744 | $780.0K | 0.12% | +90,038+114.4% | Added |
| Macquarie Group Ltd | 154,418 | $713.0K | 0.00% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 139,819 | $646.0K | 0.00% | +1,785+1.3% | Added |
| Rhumbline Advisers | 135,544 | $626.0K | 0.00% | +55,659+69.7% | Added |
| FMR LLC | 123,379 | $570.0K | 0.00% | −3,324−2.6% | Reduced |
| Cubist Systematic Strategies, LLC | 119,516 | $552.0K | 0.00% | −166,478−58.2% | Reduced |
| California State Teachers Retirement System | 101,735 | $470.0K | 0.00% | +21,386+26.6% | Added |
| Alliancebernstein L.P. | 89,900 | $415.0K | 0.00% | +12,600+16.3% | Added |
| UBS Asset Management Americas Inc | 88,374 | $408.3K | 0.00% | 00.0% | Unchanged |
| Kennedy Capital Management, Inc. | 88,402 | $408.0K | 0.01% | +88,402 | New |
| Credit Suisse AG | 80,542 | $373.0K | 0.00% | +4,585+6.0% | Added |
| QVT Financial LP | 62,657 | $289.0K | 0.02% | 00.0% | Unchanged |
| Bank of America Corp | 56,777 | $262.0K | 0.00% | +22,272+64.5% | Added |
| Balyasny Asset Management LLC | 55,249 | $255.0K | 0.00% | +26,724+93.7% | Added |
| New York State Common Retirement Fund | 48,705 | $225.0K | 0.00% | −118−0.2% | Reduced |
| Caxton Associates LP | 47,915 | $221.0K | 0.03% | +47,915 | New |
| SG Americas Securities, LLC | 47,555 | $220.0K | 0.00% | +47,555 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 42,300 | $195.0K | 0.00% | −336,700−88.8% | Reduced |
| American International Group, Inc. | 41,017 | $189.0K | 0.00% | +5,484+15.4% | Added |
| Cornercap Investment Counsel Inc | 40,477 | $187.0K | 0.03% | +40,477 | New |
| Prudential Financial Inc | 39,695 | $183.0K | 0.00% | +39,695 | New |
| XTX Topco Ltd | 38,724 | $179.0K | 0.07% | +28,638+283.9% | Added |
| MetLife Investment Management | 38,495 | $177.8K | 0.00% | +13,522+54.1% | Added |
| Partners Group Holding AG | 37,473 | $173.0K | 0.01% | +37,473 | New |
| Manufacturers Life Insurance Company, The | 36,339 | $167.9K | 0.00% | +4,979+15.9% | Added |
| Virtus ETF Advisers LLC | 34,799 | $161.0K | 0.06% | +6,505+23.0% | Added |
| Barclays PLC | 34,087 | $157.0K | 0.00% | −7,487−18.0% | Reduced |
| Voya Investment Management LLC | 33,172 | $153.0K | 0.00% | +6,846+26.0% | Added |
| Legal & General Group Plc | 31,546 | $145.0K | 0.00% | +6,251+24.7% | Added |
| Invesco Ltd. | 29,190 | $135.0K | 0.00% | −878−2.9% | Reduced |
| State Board of Administration of Florida Retirement System | 27,292 | $126.0K | 0.00% | +100.0% | Added |
| ExodusPoint Capital Management, LP | 25,529 | $118.0K | 0.00% | −251,560−90.8% | Reduced |
| Prio Wealth Limited Partnership | 23,529 | $108.7K | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 23,400 | $108.0K | 0.00% | +10,688+84.1% | Added |
| Qube Research & Technologies Ltd | 23,126 | $107.0K | 0.00% | −276,328−92.3% | Reduced |
| Jasper Ridge Partners, L.P. | 23,100 | $107.0K | 0.01% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 22,616 | $104.0K | 0.00% | +22,616 | New |
| Dynamic Technology Lab Private Ltd | 20,836 | $96.0K | 0.01% | +3,809+22.4% | Added |
| Arizona State Retirement System | 20,481 | $95.0K | 0.00% | +4,930+31.7% | Added |
| Susquehanna International Group, LLP | 19,093 | $88.0K | 0.00% | −154,693−89.0% | Reduced |
| Occudo Quantitative Strategies LP | 19,056 | $88.0K | 0.01% | −119,160−86.2% | Reduced |
| Bank of Montreal | 16,737 | $86.0K | 0.00% | −1,140,898−98.6% | Reduced |
| HSBC Holdings PLC | 18,737 | $85.0K | 0.00% | +18,737 | New |
| ProShare Advisors LLC | 17,399 | $80.0K | 0.00% | −4,649−21.1% | Reduced |
| SEI Investments Co | 17,256 | $80.0K | 0.00% | +17,256 | New |
| Grimes & Company, Inc. | 14,922 | $69.0K | 0.00% | +553+3.8% | Added |
| Simplex Trading, LLC | 14,683 | $67.0K | 0.00% | −2,497−14.5% | Reduced |
| Principal Financial Group Inc | 13,938 | $64.0K | 0.00% | +2,769+24.8% | Added |
| Victory Capital Management Inc | 12,537 | $58.0K | 0.00% | +2,275+22.2% | Added |
| Martingale Asset Management L P | 12,110 | $56.0K | 0.00% | +65+0.5% | Added |
| Janus Henderson Group PLC | 11,343 | $53.0K | 0.00% | +145+1.3% | Added |
| Amalgamated Bank | 11,135 | $51.0K | 0.00% | +345+3.2% | Added |
| AXA S.A. | 10,800 | $49.9K | 0.00% | 00.0% | Unchanged |
| Walleye Capital LLC | 10,264 | $47.0K | 0.00% | −383,986−97.4% | Reduced |
| Empirical Asset Management, LLC | 10,000 | $46.0K | 0.05% | 00.0% | Unchanged |