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 |
|---|---|---|---|---|---|
| Citigroup Inc | 9,599 | $44.0K | 0.00% | +3,241+51.0% | Added |
| Washington University | 9,367 | $43.0K | 0.02% | +9,367 | New |
| Ensign Peak Advisors, Inc | 9,040 | $42.0K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 8,829 | $41.0K | 0.00% | −6,295−41.6% | Reduced |
| Tower Research Capital LLC (TRC) | 8,492 | $39.0K | 0.00% | +67+0.8% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 7,262 | $34.0K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 5,400 | $24.0K | 0.00% | 00.0% | Unchanged |
| Metropolitan Life Insurance Co | 4,758 | $22.0K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 4,484 | $20.0K | 0.00% | −51,974−92.1% | Reduced |
| Great West Life Assurance Co | 3,638 | $17.0K | 0.00% | 00.0% | Unchanged |
| PEAK6 Investments LLC | 5,000 | $16.4K | 0.00% | +5,000 | New |
| Advisor Group Holdings, Inc. | 3,235 | $15.0K | 0.00% | +118+3.8% | Added |
| STRS Ohio | 2,500 | $11.0K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 2,023 | $9.00K | 0.00% | −16,100−88.8% | Reduced |
| Wells Fargo & Company | 1,138 | $5.00K | 0.00% | −16,596−93.6% | Reduced |
| Cutler Group LP | 1,200 | $5.00K | 0.00% | 00.0% | Unchanged |
| Quantbot Technologies LP | 954 | $4.00K | 0.00% | −8,400−89.8% | Reduced |
| Nisa Investment Advisors, LLC | 610 | $3.00K | 0.00% | −48,100−98.7% | Reduced |
| Royal Bank of Canada | 494 | $2.00K | 0.00% | −3,903−88.8% | Reduced |
| North Star Investment Management Corp. | 150 | $1.00K | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 246 | $1.00K | 0.00% | 00.0% | Unchanged |
| Captrust Financial Advisors | 226 | $1.00K | 0.00% | −37−14.1% | Reduced |
| Dark Forest Capital Management LP | 311 | $1.00K | 0.00% | +311 | New |
| Capital Advisors, Ltd. LLC | 71 | $0 | 0.00% | +71 | New |
| Ellevest, Inc. | 57 | $0 | 0.00% | +57 | New |
| Parallel Advisors, LLC | 78 | $0 | 0.00% | +78 | New |
| Rho Capital Partners Inc | 0 | $0 | 0.00% | −796,458−100.0% | Sold out |
| Lindbrook Capital, LLC | 0 | $0 | 0.00% | −659−100.0% | Sold out |
| CIBC Asset Management Inc | 0 | $0 | 0.00% | −1,055,994−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −723,933−100.0% | Sold out |
| Pinz Capital Management, LP | 0 | $0 | 0.00% | −400,000−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −176,078−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −143,321−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −67,991−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −67,500−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −61,525−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −57,000−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −52,900−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −32,667−100.0% | Sold out |
| Point72 Hong Kong Ltd | 0 | $0 | 0.00% | −14,280−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −13,274−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −11,902−100.0% | Sold out |
| Alpine Global Management, LLC | 0 | $0 | 0.00% | −10,025−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −10,128−100.0% | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −784−100.0% | Sold out |
| Parametric Portfolio Associates LLC | – | – | – | – | Not filed |
| Amalgamated Financial Corp. | – | – | – | – | Not filed |