Skip to main content
Livermore
Livermore
ZHEN

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.

Q4 2021 vs. Q3 2021

How the institutions holding Mersana Therapeutics, Inc. changed between Q3 2021 and Q4 2021.

All holders in Q4 2021All holders in Q3 2021

13F holders of MRSN: Q3 2021 compared with Q4 2021
MeasureQ3 2021Of which not filed for Q4 2021Q4 2021Change
Holders1102122+14
Shares68.7M64.6K70.2M+1.51M (+2.2%)
Value$648.3M$610.0K$436.6M−$211.1M (−32.6%)

2 institutions that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so the changes leave them out.

New holders (30)

Institutions that held Mersana Therapeutics, Inc. at the end of Q4 2021 but not at the end of Q3 2021.

Institutions new to MRSN in Q4 2021
InstitutionSharesValue% of portfolio
Point72 Asset Management, L.P.818,100$5.09M0.02%
Renaissance Technologies LLC342,600$2.13M0.00%
Fred Alger Management, LLC228,490$1.42M0.00%
Federated Hermes, Inc.202,583$1.26M0.00%
AXA S.A.148,000$921.0K0.00%
HRT Financial LP116,922$727.0K0.00%
Cubist Systematic Strategies, LLC112,312$699.0K0.01%
Nomura Holdings Inc97,865$609.0K0.00%
Gsa Capital Partners LLP87,065$542.0K0.07%
Jump Financial, LLC72,900$453.0K0.03%
Squarepoint Ops LLC66,672$415.0K0.00%
Qube Research & Technologies Ltd57,757$359.0K0.00%
Trexquant Investment LP41,317$257.0K0.02%
Dynamic Technology Lab Private Ltd32,871$204.0K0.02%
ExodusPoint Capital Management, LP30,411$189.0K0.00%
Engineers Gate Manager LP20,500$128.0K0.01%
Alpine Global Management, LLC15,839$99.0K0.01%
Bridgefront Capital, LLC15,622$97.0K0.09%
Balyasny Asset Management LLC14,630$91.0K0.00%
Martingale Asset Management L P12,045$75.0K0.00%
XTX Topco Ltd11,640$72.0K0.04%
Janus Henderson Group PLC11,207$70.0K0.00%
Teacher Retirement System of Texas10,819$67.0K0.00%
Empirical Asset Management, LLC10,000$62.0K0.06%
Point72 Hong Kong Ltd9,173$57.0K0.00%
Ensign Peak Advisors, Inc9,040$56.0K0.00%
Dark Forest Capital Management LP7,421$46.0K0.02%
STRS Ohio2,500$15.0K0.00%
Parallel Advisors, LLC1,276$8.00K0.00%
CWM, LLC109$1.00K0.00%

Sold out (16)

Institutions that held Mersana Therapeutics, Inc. at the end of Q3 2021 and filed for Q4 2021 without it.

Institutions that sold out of MRSN in Q4 2021
InstitutionShares, Q3 2021Value, Q3 2021
Pictet Asset Management SA2,237,868$21.1M
Alkeon Capital Management LLC1,799,838$17.0M
Marshall Wace, LLP384,736$3.63M
First Manhattan Co218,070$2.06M
AlphaCentric Advisors LLC65,500$618.0K
TD Asset Management Inc45,057$425.0K
Boothbay Fund Management, LLC22,764$215.0K
DekaBank Deutsche Girozentrale21,000$195.0K
Virtu Financial LLC18,777$177.0K
Allstate Corp13,667$129.0K
AQR Capital Management LLC12,330$116.0K
Fox Run Management, L.L.C.11,779$111.0K
Penserra Capital Management LLC1,640$15.0K
O'Shaughnessy Asset Management, LLC651$6.00K
Simplex Trading, LLC173$2.00K
Ellevest, Inc.8$0

Not filed for Q4 2021 yet (2)

Institutions that held Mersana Therapeutics, Inc. at the end of Q3 2021 and haven't filed a 13F for Q4 2021. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding MRSN in Q3 2021 that haven't filed for Q4 2021
InstitutionShares, Q3 2021Value, Q3 2021
Marshall Wace North America L.P.59,082$558.0K
First Mercantile Trust Co5,541$52.0K