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 |
|---|---|---|---|---|---|
| UBS Group AG | 26,295 | $178.0K | 0.00% | +17,466+197.8% | Added |
| Virtu Financial LLC | 25,521 | $173.0K | 0.02% | +25,521 | New |
| Teacher Retirement System of Texas | 25,514 | $172.0K | 0.00% | +25,514 | New |
| Atom Investors LP | 25,104 | $170.0K | 0.06% | +25,104 | New |
| PDT Partners, LLC | 24,975 | $169.0K | 0.03% | −216,924−89.7% | Reduced |
| Prio Wealth Limited Partnership | 23,529 | $159.1K | 0.01% | 00.0% | Unchanged |
| Jasper Ridge Partners, L.P. | 23,100 | $156.0K | 0.01% | 00.0% | Unchanged |
| Great West Life Assurance Co | 22,635 | $153.0K | 0.00% | +18,997+522.2% | 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 |
| Russell Investments Group, Ltd. | 21,402 | $144.0K | 0.00% | +16,918+377.3% | Added |
| Arizona State Retirement System | 21,086 | $143.0K | 0.00% | +605+3.0% | Added |
| SEI Investments Co | 20,303 | $137.0K | 0.00% | +3,047+17.7% | Added |
| Principal Financial Group Inc | 18,920 | $128.0K | 0.00% | +4,982+35.7% | Added |
| Bank of Montreal | 16,669 | $127.0K | 0.00% | −68−0.4% | Reduced |
| ProShare Advisors LLC | 18,110 | $122.0K | 0.00% | +711+4.1% | Added |
| Verition Fund Management LLC | 16,312 | $110.0K | 0.00% | +16,312 | New |
| Squarepoint Ops LLC | 15,386 | $104.0K | 0.00% | −210,986−93.2% | Reduced |
| Grimes & Company, Inc. | 15,172 | $103.0K | 0.01% | +250+1.7% | Added |
| Point72 Hong Kong Ltd | 15,156 | $102.0K | 0.01% | +15,156 | New |
| Delphia (USA) Inc. | 14,728 | $100.0K | 0.11% | +14,728 | New |
| E Fund Management Co., Ltd. | 14,695 | $99.0K | 0.01% | +14,695 | New |
| Corton Capital Inc. | 14,459 | $98.0K | 0.12% | +14,459 | 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 |
| Campbell & CO Investment Adviser LLC | 11,959 | $81.0K | 0.02% | +11,959 | New |
| 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 |
| Empirical Asset Management, LLC | 10,000 | $68.0K | 0.07% | 00.0% | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 7,262 | $49.0K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 7,067 | $47.0K | 0.00% | +1,667+30.9% | Added |
| IFP Advisors, Inc | 1,800 | $36.0K | 0.00% | +1,800 | New |
| Metropolitan Life Insurance Co | 4,758 | $32.2K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 3,235 | $22.0K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 2,789 | $18.0K | 0.00% | +2,295+464.6% | Added |
| STRS Ohio | 2,500 | $16.0K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 1,561 | $10.0K | 0.00% | +423+37.2% | Added |
| 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 |
| China Universal Asset Management Co., Ltd. | 910 | $6.00K | 0.00% | +910 | 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 |
| Lindbrook Capital, LLC | 445 | $3.00K | 0.00% | +445 | New |
| Daiwa Securities Group Inc. | 246 | $2.00K | 0.00% | 00.0% | Unchanged |
| 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 |
| 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 |
| Woodline Partners LP | 0 | $0 | 0.00% | −3,161,576−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −480,644−100.0% | Sold out |
| EcoR1 Capital, LLC | 0 | $0 | 0.00% | −310,960−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −203,067−100.0% | Sold out |
| Caxton Associates LP | 0 | $0 | 0.00% | −47,915−100.0% | Sold out |
| Partners Group Holding AG | 0 | $0 | 0.00% | −37,473−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −18,737−100.0% | Sold out |
| Victory Capital Management Inc | 0 | $0 | 0.00% | −12,537−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −10,264−100.0% | Sold out |
| Washington University | 0 | $0 | 0.00% | −9,367−100.0% | Sold out |
| PEAK6 Investments LLC | 0 | $0 | 0.00% | −5,000−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −954−100.0% | Sold out |
| Captrust Financial Advisors | 0 | $0 | 0.00% | −226−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −311−100.0% | Sold out |