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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.

Q2 2023 vs. Q1 2023

How the institutions holding Mersana Therapeutics, Inc. changed between Q1 2023 and Q2 2023.

All holders in Q2 2023All holders in Q1 2023

13F holders of MRSN: Q1 2023 compared with Q2 2023
MeasureQ1 2023Q2 2023Change
Holders158147−11
Shares106.6M112.5M+5.89M (+5.5%)
Value$437.2M$370.2M−$67.0M (−15.3%)

New holders (33)

Institutions that held Mersana Therapeutics, Inc. at the end of Q2 2023 but not at the end of Q1 2023.

Institutions new to MRSN in Q2 2023
InstitutionSharesValue% of portfolio
Balyasny Asset Management LLC4,839,515$15.9M0.04%
Deerfield Management Company, L.P. (Series C)2,885,400$9.49M0.20%
Logos Global Management LP2,800,000$9.21M1.27%
Redmile Group, LLC1,698,626$5.59M0.21%
Boxer Capital, LLC1,000,000$3.29M0.15%
RTW Investments, LP614,838$2.02M0.04%
Ameriprise Financial Inc572,273$1.88M0.00%
First Manhattan Co569,594$1.87M0.01%
Readystate Asset Management LP567,300$1.87M0.19%
Adage Capital Partners GP, L.L.C.500,000$1.65M0.00%
Tri Locum Partners LP428,307$1.41M0.52%
Schonfeld Strategic Advisors LLC320,540$1.05M0.01%
Jane Street Group, LLC314,483$1.03M0.00%
Nomura Holdings Inc148,979$490.1K0.00%
Federated Hermes, Inc.140,645$462.7K0.00%
Graham Capital Management, L.P.73,744$242.6K0.01%
Ghost Tree Capital, LLC61,250$201.5K0.07%
Ikarian Capital, LLC50,000$164.5K0.06%
Jefferies Financial Group Inc.39,975$131.5K0.00%
Pale Fire Capital SE25,400$83.6K0.01%
Jump Financial, LLC22,392$73.7K0.00%
Harbor Capital Advisors, Inc.21,339$70.2K0.01%
Exchange Traded Concepts, LLC15,301$50.3K0.00%
Mirabella Financial Services LLP14,472$47.6K0.01%
Tocqueville Asset Management L.P.13,000$42.8K0.00%
Y-Intercept (Hong Kong) Ltd11,649$38.3K0.00%
Boothbay Fund Management, LLC10,025$33.0K0.00%
Belvedere Trading LLC8,081$26.6K0.01%
Allworth Financial LP5,055$16.6K0.00%
PEAK6 Investments LLC5,000$16.4K0.00%
Point72 Asset Management, L.P.3,477$11.4K0.00%
Signaturefd, LLC369$1.21K0.00%
US Bancorp53$1740.00%

Sold out (44)

Institutions that held Mersana Therapeutics, Inc. at the end of Q1 2023 and filed for Q2 2023 without it.

Institutions that sold out of MRSN in Q2 2023
InstitutionShares, Q1 2023Value, Q1 2023
Braidwell LP3,355,805$13.8M
Ally Bridge Group (NY) LLC1,191,271$4.90M
Hillsdale Investment Management Inc.693,200$2.85M
CIBC Asset Management Inc476,684$1.96M
UBS Oconnor LLC462,699$1.90M
Lion Point Capital, LP409,120$1.68M
Sectoral Asset Management Inc343,079$1.41M
Vontobel Holding Ltd.343,079$1.41M
Platinum Investment Management Ltd290,298$1.19M
Tekla Capital Management LLC162,383$667.4K
Allianz Asset Management GmbH90,500$372.0K
HAP Trading, LLC89,563$368.0K
Healthcare of Ontario Pension Plan Trust Fund84,000$345.2K
Trexquant Investment LP80,438$330.6K
Mackenzie Financial Corp68,822$282.9K
Jacobs Levy Equity Management, Inc65,891$270.8K
Los Angeles Capital Management LLC61,790$254.0K
Acuta Capital Partners, LLC60,000$246.6K
Occudo Quantitative Strategies LP59,411$244.2K
Connor, Clark & Lunn Investment Management Ltd.59,051$242.7K
Prudential Financial Inc51,155$210.2K
SG Americas Securities, LLC46,605$192.0K
XTX Topco Ltd45,738$188.0K
CM Wealth Advisors LLC45,367$176.0K
Cornercap Investment Counsel Inc42,633$175.2K
ExodusPoint Capital Management, LP40,034$165.0K
SEI Investments Co28,977$119.1K
Man Group plc–$102.8K
Bayesian Capital Management, LP24,800$101.9K
Walleye Trading LLC21,415$88.0K
Aquatic Capital Management LLC21,500$88.0K
Bank of Montreal20,501$85.6K
BIT Capital GmbH16,931$69.6K
Point72 Middle East FZE15,976$65.7K
Nebula Research & Development LLC15,702$64.5K
Pictet Asset Management SA11,490$47.2K
Lazard Asset Management LLC10,821$44.0K
Wolverine Trading, LLC10,259$41.0K
Public Employees Retirement System of Ohio1,175$5.00K
TCI Wealth Advisors, Inc.986$4.05K
Cutler Group LP1,200$4.00K
Quadrant Capital Group LLC116$477
Ellevest, Inc.57$234
Capital Advisors, Ltd. LLC71$0