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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.

Q1 2024 vs. Q4 2023

How the institutions holding Mersana Therapeutics, Inc. changed between Q4 2023 and Q1 2024.

All holders in Q1 2024All holders in Q4 2023

13F holders of MRSN: Q4 2023 compared with Q1 2024
MeasureQ4 2023Q1 2024Change
Holders106125+19
Shares113.3M117.5M+4.20M (+3.7%)
Value$263.0M$526.3M+$263.3M (+100.1%)

New holders (38)

Institutions that held Mersana Therapeutics, Inc. at the end of Q1 2024 but not at the end of Q4 2023.

Institutions new to MRSN in Q1 2024
InstitutionSharesValue% of portfolio
Woodline Partners LP2,934,622$13.1M0.12%
Cormorant Asset Management, LP2,600,000$11.6M0.51%
Octagon Capital Advisors LP1,000,000$4.48M0.54%
Qube Research & Technologies Ltd959,695$4.30M0.01%
Ally Bridge Group (NY) LLC801,437$3.59M2.00%
Deep Track Capital, LP579,674$2.60M0.07%
Verition Fund Management LLC564,163$2.53M0.02%
Wellington Management Group LLP534,618$2.40M0.00%
ClariVest Asset Management LLC471,848$2.11M0.22%
Rafferty Asset Management, LLC368,434$1.65M0.01%
Monashee Investment Management LLC310,000$1.39M0.16%
Susquehanna Fundamental Investments, LLC234,116$1.05M0.05%
Canada Pension Plan Investment Board204,900$918.0K0.00%
Lighthouse Investment Partners, LLC129,515$580.2K0.03%
HighVista Strategies LLC122,315$548.0K0.20%
State of Wisconsin Investment Board106,500$477.1K0.00%
HealthInvest Partners AB100,000$448.0K0.27%
Profund Advisors LLC58,220$260.8K0.01%
Deerfield Management Company, L.P. (Series C)57,478$257.5K0.00%
Mirae Asset Global Investments Co., Ltd.54,127$226.2K0.00%
Gsa Capital Partners LLP35,255$158.0K0.01%
XTX Topco Ltd33,539$150.3K0.02%
Walleye Trading LLC31,526$141.2K0.00%
Aigen Investment Management, LP24,530$109.9K0.02%
NEOS Investment Management LLC19,465$87.2K0.01%
E Fund Management Co., Ltd.17,411$78.0K0.00%
Prudential Financial Inc17,335$77.7K0.00%
Oxford Asset Management LLP16,586$74.3K0.08%
Jump Financial, LLC16,261$72.8K0.00%
Mackenzie Financial Corp13,819$61.9K0.00%
HSBC Holdings PLC12,608$56.5K0.00%
Fox Run Management, L.L.C.12,261$54.9K0.01%
Inceptionr LLC11,188$50.1K0.01%
Pacer Advisors, Inc.1,716$7.69K0.00%
Federated Hermes, Inc.176$7880.00%
Nelson, Van Denburg & Campbell Wealth Management Group, LLC22$980.00%
Frazier Financial Advisors, LLC5$230.00%
CWM, LLC5$00.00%

Sold out (19)

Institutions that held Mersana Therapeutics, Inc. at the end of Q4 2023 and filed for Q1 2024 without it.

Institutions that sold out of MRSN in Q1 2024
InstitutionShares, Q4 2023Value, Q4 2023
Philosophy Capital Management LLC1,264,567$2.93M
Readystate Asset Management LP295,038$684.5K
Foundations Investment Advisors, LLC102,000$344.8K
Amundi95,540$308.6K
HRT Financial LP105,815$245.0K
LPL Financial LLC76,694$177.9K
Harbor Capital Advisors, Inc.47,472$110.1K
Man Group plc44,600$103.5K
Engineers Gate Manager LP43,694$101.4K
AQR Capital Management LLC31,559$73.2K
Group One Trading, L.P.31,081$72.1K
Point72 Middle East FZE25,511$59.2K
Pale Fire Capital SE25,400$58.9K
Public Employees Retirement System of Ohio15,800$36.7K
Squarepoint Ops LLC13,668$31.7K
Bayesian Capital Management, LP11,900$27.6K
Graham Capital Management, L.P.11,811$27.4K
Quantbot Technologies LP10,945$25.4K
Advisory Services Network, LLC100$232