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 |
|---|---|---|---|---|---|
| Daiwa Securities Group Inc. | 246 | $1.00K | 0.00% | 00.0% | Unchanged |
| Captrust Financial Advisors | 263 | $1.00K | 0.00% | −95−26.5% | Reduced |
| North Star Investment Management Corp. | 150 | $1.00K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 784 | $3.00K | 0.00% | +784 | New |
| Lindbrook Capital, LLC | 659 | $3.00K | 0.00% | +659 | New |
| Cutler Group LP | 1,200 | $4.00K | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 2,500 | $9.00K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 3,117 | $12.0K | 0.00% | +2,240+255.4% | Added |
| Great West Life Assurance Co | 3,638 | $15.0K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 4,397 | $18.0K | 0.00% | −10,701−70.9% | Reduced |
| Metropolitan Life Insurance Co | 4,758 | $19.0K | 0.00% | −4,764−50.0% | Reduced |
| Ameritas Investment Partners, Inc. | 5,400 | $22.0K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 6,358 | $25.0K | 0.00% | −220,674−97.2% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 7,262 | $29.0K | 0.00% | −2,564−26.1% | Reduced |
| Tower Research Capital LLC (TRC) | 8,425 | $34.0K | 0.00% | −11,421−57.5% | Reduced |
| Ensign Peak Advisors, Inc | 9,040 | $36.0K | 0.00% | 00.0% | Unchanged |
| Victory Capital Management Inc | 10,262 | $36.0K | 0.00% | +10,262 | New |
| Quantbot Technologies LP | 9,354 | $37.0K | 0.00% | +9,354 | New |
| Engineers Gate Manager LP | 10,128 | $40.0K | 0.00% | −10,372−50.6% | Reduced |
| Alpine Global Management, LLC | 10,025 | $40.0K | 0.01% | −5,814−36.7% | Reduced |
| XTX Topco Ltd | 10,086 | $40.0K | 0.02% | −1,554−13.4% | Reduced |
| Empirical Asset Management, LLC | 10,000 | $40.0K | 0.04% | 00.0% | Unchanged |
| Amalgamated Bank | 10,790 | $43.0K | 0.00% | −846−7.3% | Reduced |
| Amalgamated Financial Corp. | 10,790 | $43.0K | 0.00% | +10,790 | New |
| AXA S.A. | 10,800 | $43.1K | 0.00% | −137,200−92.7% | Reduced |
| Janus Henderson Group PLC | 11,198 | $45.0K | 0.00% | −9−0.1% | Reduced |
| Principal Financial Group Inc | 11,169 | $45.0K | 0.00% | +658+6.3% | Added |
| Teacher Retirement System of Texas | 11,902 | $47.0K | 0.00% | +1,083+10.0% | Added |
| Martingale Asset Management L P | 12,045 | $49.0K | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 12,712 | $51.0K | 0.00% | +12,712 | New |
| Virtu Financial LLC | 13,274 | $53.0K | 0.00% | +13,274 | New |
| Point72 Hong Kong Ltd | 14,280 | $57.0K | 0.01% | +5,107+55.7% | Added |
| Grimes & Company, Inc. | 14,369 | $57.0K | 0.00% | +14,369 | New |
| UBS Group AG | 15,124 | $60.0K | 0.00% | −166,039−91.7% | Reduced |
| Arizona State Retirement System | 15,551 | $62.0K | 0.00% | +100+0.6% | Added |
| Dynamic Technology Lab Private Ltd | 17,027 | $68.0K | 0.01% | −15,844−48.2% | Reduced |
| Simplex Trading, LLC | 17,180 | $68.0K | 0.00% | +17,180 | New |
| Wells Fargo & Company | 17,734 | $71.0K | 0.00% | −24,008−57.5% | Reduced |
| Group One Trading, L.P. | 18,123 | $72.0K | 0.00% | +16,800+1,269.8% | Added |
| ProShare Advisors LLC | 22,048 | $88.0K | 0.00% | −3,719−14.4% | Reduced |
| Jasper Ridge Partners, L.P. | 23,100 | $92.0K | 0.00% | 00.0% | Unchanged |
| Prio Wealth Limited Partnership | 23,529 | $94.0K | 0.00% | 00.0% | Unchanged |
| MetLife Investment Management | 24,973 | $99.6K | 0.00% | −2,050−7.6% | Reduced |
| Legal & General Group Plc | 25,295 | $101.0K | 0.00% | +181+0.7% | Added |
| Voya Investment Management LLC | 26,326 | $105.0K | 0.00% | 00.0% | Unchanged |
| State Board of Administration of Florida Retirement System | 27,282 | $109.0K | 0.00% | 00.0% | Unchanged |
| Virtus ETF Advisers LLC | 28,294 | $113.0K | 0.05% | −1,680−5.6% | Reduced |
| Balyasny Asset Management LLC | 28,525 | $114.0K | 0.00% | +13,895+95.0% | Added |
| Parametric Portfolio Associates LLC | 29,837 | $119.0K | 0.00% | +251+0.8% | Added |
| Invesco Ltd. | 30,068 | $120.0K | 0.00% | +350+1.2% | Added |
| Manufacturers Life Insurance Company, The | 31,360 | $125.1K | 0.00% | −7,214−18.7% | Reduced |
| Marshall Wace, LLP | 32,667 | $130.0K | 0.00% | +32,667 | New |
| Bank of America Corp | 34,505 | $138.0K | 0.00% | −8,342−19.5% | Reduced |
| American International Group, Inc. | 35,533 | $142.0K | 0.00% | −2,501−6.6% | Reduced |
| Barclays PLC | 41,574 | $166.0K | 0.00% | −48,545−53.9% | Reduced |
| Nisa Investment Advisors, LLC | 48,710 | $194.0K | 0.00% | +48,100+7,885.2% | Added |
| New York State Common Retirement Fund | 48,823 | $195.0K | 0.00% | −2,985−5.8% | Reduced |
| Schonfeld Strategic Advisors LLC | 52,900 | $211.0K | 0.00% | +52,900 | New |
| Russell Investments Group, Ltd. | 56,458 | $224.0K | 0.00% | +56,458 | New |
| Man Group plc | 57,000 | $227.0K | 0.00% | +57,000 | New |
| Walleye Trading LLC | 61,525 | $245.0K | 0.01% | −190−0.3% | Reduced |
| QVT Financial LP | 62,657 | $250.0K | 0.01% | 00.0% | Unchanged |
| Jump Financial, LLC | 67,500 | $269.0K | 0.01% | −5,400−7.4% | Reduced |
| Tudor Investment Corp Et Al | 67,991 | $271.0K | 0.01% | +67,991 | New |
| Credit Suisse AG | 75,957 | $304.0K | 0.00% | +9,236+13.8% | Added |
| Alliancebernstein L.P. | 77,300 | $308.0K | 0.00% | +200+0.3% | Added |
| Gsa Capital Partners LLP | 78,706 | $314.0K | 0.04% | −8,359−9.6% | Reduced |
| Rhumbline Advisers | 79,885 | $319.0K | 0.00% | −892−1.1% | Reduced |
| California State Teachers Retirement System | 80,349 | $321.0K | 0.00% | −6,897−7.9% | Reduced |
| UBS Asset Management Americas Inc | 88,374 | $352.6K | 0.00% | +44,955+103.5% | Added |
| FMR LLC | 126,703 | $505.0K | 0.00% | +5,016+4.1% | Added |
| Swiss National Bank | 135,996 | $543.0K | 0.00% | +9,600+7.6% | Added |
| Price T Rowe Associates Inc | 138,034 | $551.0K | 0.00% | +23,587+20.6% | Added |
| Occudo Quantitative Strategies LP | 138,216 | $551.0K | 0.05% | +138,216 | New |
| Jane Street Group, LLC | 143,321 | $572.0K | 0.00% | +91,798+178.2% | Added |
| Macquarie Group Ltd | 154,418 | $617.0K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 173,786 | $693.0K | 0.00% | +51,829+42.5% | Added |
| HRT Financial LP | 176,078 | $702.0K | 0.01% | +59,156+50.6% | Added |
| Dimensional Fund Advisors LP | 186,040 | $742.0K | 0.00% | −8,476−4.4% | Reduced |
| State of Wisconsin Investment Board | 195,300 | $779.0K | 0.00% | +123,700+172.8% | Added |
| Allianz Asset Management GmbH | 208,520 | $832.0K | 0.00% | −65,848−24.0% | Reduced |
| ExodusPoint Capital Management, LP | 277,089 | $1.11M | 0.02% | +246,678+811.1% | Added |
| Bank of New York Mellon Corp | 283,095 | $1.13M | 0.00% | +3,165+1.1% | Added |
| Cubist Systematic Strategies, LLC | 285,994 | $1.14M | 0.01% | +173,682+154.6% | Added |
| Qube Research & Technologies Ltd | 299,454 | $1.20M | 0.01% | +241,697+418.5% | Added |
| Nuveen Asset Management, LLC | 299,450 | $1.20M | 0.00% | +6,493+2.2% | Added |
| JPMorgan Chase & Co | 309,629 | $1.24M | 0.00% | +278,047+880.4% | Added |
| Fred Alger Management, LLC | 323,068 | $1.29M | 0.00% | +94,578+41.4% | Added |
| PDT Partners, LLC | 326,419 | $1.30M | 0.11% | +214,749+192.3% | Added |
| EcoR1 Capital, LLC | 326,578 | $1.30M | 0.04% | +326,578 | New |
| DAFNA Capital Management LLC | 352,763 | $1.41M | 0.37% | +212,500+151.5% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 379,000 | $1.51M | 0.01% | +379,000 | New |
| Walleye Capital LLC | 394,250 | $1.57M | 0.05% | −510−0.1% | Reduced |
| Pinz Capital Management, LP | 400,000 | $1.60M | 1.00% | +400,000 | New |
| Hudson Bay Capital Management LP | 435,000 | $1.74M | 0.02% | +145,000+50.0% | Added |
| Charles Schwab Investment Management Inc | 464,660 | $1.85M | 0.00% | −23,345−4.8% | Reduced |
| Wellington Management Group LLP | 480,644 | $1.92M | 0.00% | −4,536,434−90.4% | Reduced |
| Squarepoint Ops LLC | 488,997 | $1.95M | 0.01% | +422,325+633.4% | Added |
| Platinum Investment Management Ltd | 495,481 | $1.98M | 0.06% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 652,613 | $2.60M | 0.01% | +34,197+5.5% | Added |