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 2021
Institutional positions in Mersana Therapeutics, Inc. as of Jun 30, 2021. 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
- 131
- −1 vs. Q1 2021
- Shares held
- 70.6M
- +496.4K (+0.7%) vs. Q1 2021
- Total value
- $957.8M
- −$186.5M (−16.3%) vs. Q1 2021
- New holders
- 18
- 51 more added
- Sold out
- 19
- 40 more reduced
Compare with Q1 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, Q2 2021
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q1 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Wells Fargo & Company | 52 | $1.00K | 0.00% | −21,295−99.8% | Reduced |
| Daiwa Securities Group Inc. | 129 | $2.00K | 0.00% | 00.0% | Unchanged |
| Panagora Asset Management Inc | 231 | $3.00K | 0.00% | −17,752−98.7% | Reduced |
| Simplex Trading, LLC | 273 | $3.00K | 0.00% | −755−73.4% | Reduced |
| Captrust Financial Advisors | 428 | $6.00K | 0.00% | 00.0% | Unchanged |
| Dark Forest Capital Management LP | 607 | $8.00K | 0.00% | +607 | New |
| O'Shaughnessy Asset Management, LLC | 651 | $9.00K | 0.00% | −3,012−82.2% | Reduced |
| Advisor Group Holdings, Inc. | 814 | $11.0K | 0.00% | +533+189.7% | Added |
| Penserra Capital Management LLC | 1,585 | $21.0K | 0.00% | +20+1.3% | Added |
| BNP Paribas Arbitrage, SA | 2,500 | $34.0K | 0.00% | −4,446−64.0% | Reduced |
| Great West Life Assurance Co | 3,638 | $49.0K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 3,660 | $50.0K | 0.00% | −5,850−61.5% | Reduced |
| Royal Bank of Canada | 4,715 | $64.0K | 0.00% | +722+18.1% | Added |
| Ameritas Investment Partners, Inc. | 5,400 | $73.0K | 0.00% | +864+19.0% | Added |
| First Mercantile Trust Co | 5,766 | $78.0K | 0.01% | −371−6.0% | Reduced |
| Cutler Group LP | 5,800 | $78.0K | 0.01% | +2,200+61.1% | Added |
| Tower Research Capital LLC (TRC) | 5,825 | $79.0K | 0.00% | −2,676−31.5% | Reduced |
| Point72 Hong Kong Ltd | 8,853 | $120.0K | 0.01% | +6,077+218.9% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 10,081 | $137.0K | 0.00% | +134+1.3% | Added |
| Tudor Investment Corp Et Al | 10,449 | $142.0K | 0.00% | +10,449 | New |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 11,247 | $152.0K | 0.02% | +713+6.8% | Added |
| Bridgefront Capital, LLC | 11,236 | $153.0K | 0.06% | +11,236 | New |
| Amalgamated Bank | 12,021 | $163.0K | 0.00% | +12,021 | New |
| AQR Capital Management LLC | 12,330 | $167.0K | 0.00% | −34,085−73.4% | Reduced |
| The PNC Financial Services Group, Inc. | 13,118 | $178.0K | 0.00% | −2,100−13.8% | Reduced |
| Allstate Corp | 13,996 | $190.0K | 0.01% | +319+2.3% | Added |
| Legal & General Group Plc | 14,006 | $190.0K | 0.00% | +909+6.9% | Added |
| XTX Topco Ltd | 14,541 | $197.0K | 0.07% | +14,541 | New |
| Arizona State Retirement System | 14,896 | $202.0K | 0.00% | −1,056−6.6% | Reduced |
| Virtus ETF Advisers LLC | 14,912 | $203.0K | 0.08% | +3,141+26.7% | Added |
| Walleye Trading LLC | 15,200 | $206.0K | 0.01% | +15,200 | New |
| Boothbay Fund Management, LLC | 16,071 | $218.0K | 0.01% | +16,071 | New |
| Quantbot Technologies LP | 16,200 | $219.0K | 0.02% | +16,200 | New |
| Truist Financial Corp | 16,700 | $227.0K | 0.00% | +5,000+42.7% | Added |
| Metropolitan Life Insurance Co | 19,772 | $268.5K | 0.00% | +5,167+35.4% | Added |
| Marshall Wace, LLP | 19,845 | $269.0K | 0.00% | −132,265−87.0% | Reduced |
| Dynamic Technology Lab Private Ltd | 19,821 | $269.0K | 0.03% | +19,821 | New |
| DekaBank Deutsche Girozentrale | 21,000 | $274.0K | 0.00% | 00.0% | Unchanged |
| Cubist Systematic Strategies, LLC | 20,228 | $275.0K | 0.00% | +14,350+244.1% | Added |
| ExodusPoint Capital Management, LP | 21,147 | $287.0K | 0.00% | +21,147 | New |
| Twinbeech Capital LP | 21,570 | $293.0K | 0.04% | +21,570 | New |
| Schonfeld Strategic Advisors LLC | 22,500 | $306.0K | 0.00% | −23,402−51.0% | Reduced |
| Jasper Ridge Partners, L.P. | 23,100 | $314.0K | 0.02% | 00.0% | Unchanged |
| UBS Group AG | 23,436 | $318.0K | 0.00% | −63,645−73.1% | Reduced |
| Prio Wealth Limited Partnership | 23,529 | $320.0K | 0.01% | 00.0% | Unchanged |
| MetLife Investment Management | 25,825 | $350.7K | 0.00% | +4,676+22.1% | Added |
| Principal Financial Group Inc | 26,040 | $353.0K | 0.00% | −55,116−67.9% | Reduced |
| Voya Investment Management LLC | 26,438 | $359.0K | 0.00% | +3,488+15.2% | Added |
| Point72 Asset Management, L.P. | 26,900 | $365.0K | 0.00% | −1,016,200−97.4% | Reduced |
| Invesco Ltd. | 27,045 | $368.0K | 0.00% | −385,125−93.4% | Reduced |
| State Board of Administration of Florida Retirement System | 27,117 | $368.0K | 0.00% | +4,757+21.3% | Added |
| Cowen and Company, LLC | 29,397 | $399.0K | 0.02% | +8,297+39.3% | Added |
| JPMorgan Chase & Co | 29,860 | $405.0K | 0.00% | −112,314−79.0% | Reduced |
| ProShare Advisors LLC | 30,366 | $412.0K | 0.00% | +6,587+27.7% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 30,304 | $412.0K | 0.00% | +30,304 | New |
| Parametric Portfolio Associates LLC | 35,986 | $489.0K | 0.00% | −3,815−9.6% | Reduced |
| Teachers Retirement System of the State of Kentucky | 36,839 | $500.0K | 0.00% | 00.0% | Unchanged |
| American International Group, Inc. | 38,588 | $524.0K | 0.00% | +7,563+24.4% | Added |
| Walleye Capital LLC | 38,815 | $527.0K | 0.02% | +38,815 | New |
| Manufacturers Life Insurance Company, The | 39,806 | $541.0K | 0.00% | +9,265+30.3% | Added |
| D. E. Shaw & Co., Inc. | 40,085 | $544.0K | 0.00% | −113,986−74.0% | Reduced |
| Squarepoint Ops LLC | 42,507 | $577.0K | 0.00% | −12,908−23.3% | Reduced |
| UBS Asset Management Americas Inc | 43,419 | $589.6K | 0.00% | +3,852+9.7% | Added |
| Engineers Gate Manager LP | 43,592 | $592.0K | 0.04% | +31,732+267.6% | Added |
| AlphaCentric Advisors LLC | 45,500 | $618.0K | 0.17% | +15,000+49.2% | Added |
| Jane Street Group, LLC | 52,372 | $712.0K | 0.00% | −10,963−17.3% | Reduced |
| FIL Ltd | 52,415 | $712.0K | 0.00% | 00.0% | Unchanged |
| Credit Suisse AG | 54,157 | $736.0K | 0.00% | +715+1.3% | Added |
| Caption Management, LLC | 54,700 | $742.0K | 0.07% | −191,447−77.8% | Reduced |
| Bank of America Corp | 55,232 | $750.0K | 0.00% | +21,841+65.4% | Added |
| Barclays PLC | 57,365 | $778.0K | 0.00% | −68,063−54.3% | Reduced |
| New York State Common Retirement Fund | 59,445 | $807.0K | 0.00% | +11,145+23.1% | Added |
| TD Asset Management Inc | 73,954 | $813.0K | 0.00% | −13,403−15.3% | Reduced |
| HighVista Strategies LLC | 59,906 | $814.0K | 0.58% | +59,906 | New |
| QVT Financial LP | 62,657 | $851.0K | 0.06% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 62,685 | $851.0K | 0.01% | +62,685 | New |
| Hudson Bay Capital Management LP | 70,000 | $951.0K | 0.01% | +70,000 | New |
| Alliancebernstein L.P. | 72,000 | $978.0K | 0.00% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 79,700 | $1.08M | 0.00% | −11,300−12.4% | Reduced |
| Rhumbline Advisers | 80,334 | $1.09M | 0.00% | +12,462+18.4% | Added |
| Affinity Asset Advisors, LLC | 85,000 | $1.15M | 0.55% | 00.0% | Unchanged |
| Maven Securities LTD | 84,469 | $1.17M | 0.12% | +84,469 | New |
| California State Teachers Retirement System | 94,917 | $1.29M | 0.00% | +14,647+18.2% | Added |
| Susquehanna International Group, LLP | 110,602 | $1.50M | 0.00% | −20,777−15.8% | Reduced |
| Platinum Investment Management Ltd | 110,906 | $1.51M | 0.03% | 00.0% | Unchanged |
| Bailard, Inc. | 111,000 | $1.51M | 0.05% | −20,000−15.3% | Reduced |
| Rafferty Asset Management, LLC | 117,478 | $1.59M | 0.01% | −67,630−36.5% | Reduced |
| Comerica Bank | 147,312 | $1.61M | 0.01% | +54,066+58.0% | Added |
| Swiss National Bank | 120,796 | $1.64M | 0.00% | −4,500−3.6% | Reduced |
| Silverarc Capital Management, LLC | 125,123 | $1.70M | 0.89% | +100,123+400.5% | Added |
| Morgan Stanley | 126,177 | $1.71M | 0.00% | +112,940+853.2% | Added |
| DAFNA Capital Management LLC | 128,263 | $1.74M | 0.36% | +4,000+3.2% | Added |
| Macquarie Group Ltd | 151,498 | $2.06M | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 153,742 | $2.09M | 0.01% | 00.0% | Unchanged |
| Sio Capital Management, LLC | 157,259 | $2.14M | 0.58% | 00.0% | Unchanged |
| Dimensional Fund Advisors LP | 176,004 | $2.39M | 0.00% | −2,839−1.6% | Reduced |
| Citigroup Inc | 185,464 | $2.52M | 0.00% | −44,637−19.4% | Reduced |
| Deutsche Bank AG | 196,326 | $2.67M | 0.00% | −23,072−10.5% | Reduced |
| Bank of New York Mellon Corp | 249,001 | $3.38M | 0.00% | −12,510−4.8% | Reduced |
| Nuveen Asset Management, LLC | 259,948 | $3.53M | 0.00% | +17,519+7.2% | Added |