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, Q3 2022
Institutional positions in Mersana Therapeutics, Inc. as of Sep 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
- 152
- +26 vs. Q2 2022
- Shares held
- 92.2M
- +3.90M (+4.4%) vs. Q2 2022
- Total value
- $623.4M
- +$215.4M (+52.8%) vs. Q2 2022
- New holders
- 40
- 61 more added
- Sold out
- 14
- 28 more reduced
Compare with Q2 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, Q3 2022
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q2 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Capital Advisors, Ltd. LLC | 71 | $0 | 0.00% | 00.0% | Unchanged |
| Ellevest, Inc. | 57 | $0 | 0.00% | 00.0% | Unchanged |
| US Bancorp | 52 | $0 | 0.00% | +52 | New |
| North Star Investment Management Corp. | 150 | $1.00K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 78 | $1.00K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 165 | $1.00K | 0.00% | +165 | New |
| Allspring Global Investments Holdings, LLC | 154 | $1.00K | 0.00% | +154 | New |
| Daiwa Securities Group Inc. | 246 | $2.00K | 0.00% | 00.0% | Unchanged |
| Lindbrook Capital, LLC | 445 | $3.00K | 0.00% | +445 | New |
| Group One Trading, L.P. | 742 | $5.00K | 0.00% | −1,281−63.3% | Reduced |
| Nisa Investment Advisors, LLC | 692 | $5.00K | 0.00% | +82+13.4% | Added |
| China Universal Asset Management Co., Ltd. | 910 | $6.00K | 0.00% | +910 | New |
| Simplex Trading, LLC | 1,245 | $8.00K | 0.00% | −13,438−91.5% | Reduced |
| Cutler Group LP | 1,200 | $8.00K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 1,561 | $10.0K | 0.00% | +423+37.2% | Added |
| STRS Ohio | 2,500 | $16.0K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 2,789 | $18.0K | 0.00% | +2,295+464.6% | Added |
| Advisor Group Holdings, Inc. | 3,235 | $22.0K | 0.00% | 00.0% | Unchanged |
| Metropolitan Life Insurance Co | 4,758 | $32.2K | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 1,800 | $36.0K | 0.00% | +1,800 | New |
| Ameritas Investment Partners, Inc. | 7,067 | $47.0K | 0.00% | +1,667+30.9% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 7,262 | $49.0K | 0.00% | 00.0% | Unchanged |
| Empirical Asset Management, LLC | 10,000 | $68.0K | 0.07% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 11,342 | $77.0K | 0.00% | −10.0% | Reduced |
| Amalgamated Bank | 11,451 | $77.0K | 0.00% | +316+2.8% | Added |
| Campbell & CO Investment Adviser LLC | 11,959 | $81.0K | 0.02% | +11,959 | New |
| Martingale Asset Management L P | 12,110 | $82.0K | 0.00% | 00.0% | Unchanged |
| Fox Run Management, L.L.C. | 12,085 | $82.0K | 0.03% | +12,085 | New |
| Cipher Capital LP | 12,058 | $82.0K | 0.01% | +12,058 | New |
| Corton Capital Inc. | 14,459 | $98.0K | 0.12% | +14,459 | New |
| E Fund Management Co., Ltd. | 14,695 | $99.0K | 0.01% | +14,695 | New |
| Delphia (USA) Inc. | 14,728 | $100.0K | 0.11% | +14,728 | New |
| Point72 Hong Kong Ltd | 15,156 | $102.0K | 0.01% | +15,156 | New |
| Grimes & Company, Inc. | 15,172 | $103.0K | 0.01% | +250+1.7% | Added |
| Squarepoint Ops LLC | 15,386 | $104.0K | 0.00% | −210,986−93.2% | Reduced |
| Verition Fund Management LLC | 16,312 | $110.0K | 0.00% | +16,312 | New |
| ProShare Advisors LLC | 18,110 | $122.0K | 0.00% | +711+4.1% | Added |
| Bank of Montreal | 16,669 | $127.0K | 0.00% | −68−0.4% | Reduced |
| Principal Financial Group Inc | 18,920 | $128.0K | 0.00% | +4,982+35.7% | Added |
| SEI Investments Co | 20,303 | $137.0K | 0.00% | +3,047+17.7% | Added |
| Arizona State Retirement System | 21,086 | $143.0K | 0.00% | +605+3.0% | Added |
| Russell Investments Group, Ltd. | 21,402 | $144.0K | 0.00% | +16,918+377.3% | Added |
| Ensign Peak Advisors, Inc | 22,330 | $151.0K | 0.00% | +13,290+147.0% | Added |
| Public Employees Retirement System of Ohio | 22,300 | $151.0K | 0.00% | +22,300 | New |
| Great West Life Assurance Co | 22,635 | $153.0K | 0.00% | +18,997+522.2% | Added |
| Jasper Ridge Partners, L.P. | 23,100 | $156.0K | 0.01% | 00.0% | Unchanged |
| Prio Wealth Limited Partnership | 23,529 | $159.1K | 0.01% | 00.0% | Unchanged |
| PDT Partners, LLC | 24,975 | $169.0K | 0.03% | −216,924−89.7% | Reduced |
| Atom Investors LP | 25,104 | $170.0K | 0.06% | +25,104 | New |
| Teacher Retirement System of Texas | 25,514 | $172.0K | 0.00% | +25,514 | New |
| Virtu Financial LLC | 25,521 | $173.0K | 0.02% | +25,521 | New |
| UBS Group AG | 26,295 | $178.0K | 0.00% | +17,466+197.8% | Added |
| State Board of Administration of Florida Retirement System | 27,292 | $184.0K | 0.00% | 00.0% | Unchanged |
| Ameriprise Financial Inc | 27,370 | $185.0K | 0.00% | +27,370 | New |
| Dynamic Technology Lab Private Ltd | 31,698 | $214.0K | 0.02% | +10,862+52.1% | Added |
| Ergoteles LLC | 32,161 | $217.0K | 0.01% | +32,161 | New |
| Jane Street Group, LLC | 33,416 | $226.0K | 0.00% | +33,416 | New |
| Mirae Asset Global Investments Co., Ltd. | 33,787 | $228.0K | 0.00% | +11,171+49.4% | Added |
| Legal & General Group Plc | 33,887 | $229.0K | 0.00% | +2,341+7.4% | Added |
| Arrowstreet Capital, Limited Partnership | 34,771 | $235.0K | 0.00% | +34,771 | New |
| Virtus ETF Advisers LLC | 35,048 | $237.0K | 0.09% | +249+0.7% | Added |
| Manufacturers Life Insurance Company, The | 35,316 | $238.7K | 0.00% | −1,023−2.8% | Reduced |
| Tower Research Capital LLC (TRC) | 36,410 | $246.0K | 0.00% | +27,918+328.8% | Added |
| SG Americas Securities, LLC | 39,597 | $268.0K | 0.00% | −7,958−16.7% | Reduced |
| Cornercap Investment Counsel Inc | 42,633 | $288.0K | 0.05% | +2,156+5.3% | Added |
| American International Group, Inc. | 42,793 | $289.0K | 0.00% | +1,776+4.3% | Added |
| Jump Financial, LLC | 44,598 | $301.0K | 0.01% | +44,598 | New |
| MetLife Investment Management | 46,642 | $315.3K | 0.00% | +8,147+21.2% | Added |
| Harvest Investment Services, LLC | 54,998 | $371.0K | 0.45% | +54,998 | New |
| Qube Research & Technologies Ltd | 55,089 | $372.0K | 0.00% | +31,963+138.2% | Added |
| New York State Common Retirement Fund | 56,001 | $379.0K | 0.00% | +7,296+15.0% | Added |
| Engineers Gate Manager LP | 58,500 | $395.0K | 0.02% | +58,500 | New |
| Algert Global LLC | 58,658 | $397.0K | 0.02% | +58,658 | New |
| JPMorgan Chase & Co | 60,126 | $406.0K | 0.00% | −391,013−86.7% | Reduced |
| Allianz Asset Management GmbH | 60,100 | $406.0K | 0.00% | −175,125−74.4% | Reduced |
| QVT Financial LP | 62,657 | $424.0K | 0.03% | 00.0% | Unchanged |
| XTX Topco Ltd | 63,343 | $428.0K | 0.11% | +24,619+63.6% | Added |
| Balyasny Asset Management LLC | 63,527 | $430.0K | 0.00% | +8,278+15.0% | Added |
| Voloridge Investment Management, LLC | 79,464 | $537.0K | 0.00% | +79,464 | New |
| Schonfeld Strategic Advisors LLC | 86,151 | $583.0K | 0.00% | +86,151 | New |
| UBS Asset Management Americas Inc | 88,374 | $597.4K | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 90,413 | $611.0K | 0.00% | +67,013+286.4% | Added |
| Trexquant Investment LP | 94,950 | $642.0K | 0.02% | +94,950 | New |
| Alliancebernstein L.P. | 99,700 | $674.0K | 0.00% | +9,800+10.9% | Added |
| Resolute Capital Asset Partners LLC | 100,000 | $676.0K | 0.61% | +100,000 | New |
| California State Teachers Retirement System | 102,344 | $692.0K | 0.00% | +609+0.6% | Added |
| Susquehanna International Group, LLP | 102,415 | $692.0K | 0.00% | +83,322+436.4% | Added |
| Credit Suisse AG | 102,667 | $693.0K | 0.00% | +22,125+27.5% | Added |
| Prudential Financial Inc | 102,755 | $694.0K | 0.00% | +63,060+158.9% | Added |
| Occudo Quantitative Strategies LP | 112,026 | $757.0K | 0.06% | +92,970+487.9% | Added |
| Price T Rowe Associates Inc | 112,039 | $758.0K | 0.00% | −27,780−19.9% | Reduced |
| Los Angeles Capital Management LLC | 112,525 | $761.0K | 0.00% | +112,525 | New |
| HRT Financial LP | 112,813 | $762.0K | 0.01% | +112,813 | New |
| Barclays PLC | 135,722 | $918.0K | 0.00% | +101,635+298.2% | Added |
| State of Wisconsin Investment Board | 137,770 | $931.0K | 0.00% | −102,959−42.8% | Reduced |
| Rhumbline Advisers | 147,701 | $998.0K | 0.00% | +12,157+9.0% | Added |
| LMR Partners LLP | 150,000 | $1.01M | 0.03% | +150,000 | New |
| Macquarie Group Ltd | 153,793 | $1.04M | 0.00% | −625−0.4% | Reduced |
| ExodusPoint Capital Management, LP | 157,411 | $1.06M | 0.01% | +131,882+516.6% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 162,700 | $1.10M | 0.01% | +120,400+284.6% | Added |