Mersana Therapeutics, Inc. MRSN
We take great care to ensure that the data presented and summarized in this overview for Mersana Therapeutics, Inc. is accurate and up-to-date, based on a comprehensive analysis of 13F filing forms for institutional ownership and form 4 filings for insider transactions. Please note that this data may differ from other sources and should not be relied upon as the sole basis for investment decisions.
Top Institutions Holding MRSN
View all-
Nextech Invest Ag12.1MShares$331 Million3.22% of portfolio
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Black Rock Inc. New York, NY8.38MShares$230 Million0.0% of portfolio
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Decheng Capital Management Iii (Cayman), LLC904KShares$24.8 Million0.64% of portfolio
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Clari Vest Asset Management LLC San Diego, CA500KShares$13.7 Million0.09% of portfolio
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Nuveen Asset Management, LLC Chicago, IL232KShares$6.37 Million0.0% of portfolio
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Alpha Paradigm Partners, LLC Chicago, IL58.6KShares$1.61 Million0.14% of portfolio
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Luminus Management LLC Houston, TX50KShares$1.37 Million0.36% of portfolio
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Prio Wealth Limited Partnership Boston, MA23.5KShares$645,4000.0% of portfolio
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Cwm, LLC2.88KShares$78,9430.0% of portfolio
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Advisor Group Holdings, Inc. Phoenix, AZ2.5KShares$68,5750.0% of portfolio
Latest Institutional Activity in MRSN
Top Purchases
Top Sells
About MRSN
Mersana Therapeutics, Inc., a clinical stage biopharmaceutical company, develops antibody drug conjugates (ADC) for cancer patients with unmet need. It develops XMT-1592, a Dolasynthen ADC targeting NaPi2b-expressing tumor cells, which is in phase I clinical trial for the treatment of ovarian cancer and NSCLC adenocarcinoma. The company also develops XMT-1660, a B7-H4-targeted Dolasynthen ADC candidate; and XMT-2056, an immunosynthen development candidate. It has a strategic research and development partnerships with Merck KGaA and Asana BioSciences, LLC for the development of ADC product candidates utilizing Fleximer. The company was formerly known as Nanopharma Corp. and changed its name to Mersana Therapeutics, Inc. in November 2005. Mersana Therapeutics, Inc. was incorporated in 2001 and is headquartered in Cambridge, Massachusetts.
Insider Transactions at MRSN
Insider Transaction List
View all| Date | Insider | Transaction | Ownership Type | Shares Traded | Value / Price |
|---|---|---|---|---|---|
|
Jan 06
2026
|
Andrew A. F. Hack |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Indirect |
346,545
-100.0%
|
-
|
|
Jan 06
2026
|
Andrew A. F. Hack |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
578
-100.0%
|
-
|
|
Jan 06
2026
|
Kristen Hege Director |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
578
-100.0%
|
-
|
|
Jan 06
2026
|
Mohan Bala SVP, Chief Development |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
2,927
-100.0%
|
-
|
|
Jan 06
2026
|
Alejandra Carvajal SVP, Chief Legal Officer |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
3,131
-100.0%
|
-
|
|
Jan 06
2026
|
Willard H Dere Director |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
1,567
-100.0%
|
-
|
|
Jan 06
2026
|
Allene M. Diaz Director |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
578
-100.0%
|
-
|
|
Jan 06
2026
|
Martin H. Huber Jr. President, CEO |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
9,573
-100.0%
|
-
|
|
Jan 06
2026
|
Lawrence M Alleva Director |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Indirect |
84
-100.0%
|
-
|
|
Jan 06
2026
|
Lawrence M Alleva Director |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
578
-100.0%
|
-
|
|
Jan 06
2026
|
Timothy B Lowinger SVP, Chief Sci.&Tech. Officer |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
10,466
-100.0%
|
-
|
|
Jan 06
2026
|
Anna Protopapas Director |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Indirect |
12,499
-100.0%
|
-
|
|
Jan 06
2026
|
Anna Protopapas Director |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
6,721
-100.0%
|
-
|
|
Jan 06
2026
|
Ashish Mandelia VP, Chief Accounting Officer |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
2,300
-100.0%
|
-
|
|
Jan 06
2026
|
Brian De Schuytner SVP, COO & CFO |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
5,015
-100.0%
|
-
|
|
Jan 06
2026
|
David M Mott Director |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Indirect |
383
-100.0%
|
-
|
|
Jan 06
2026
|
David M Mott Director |
SELL
Disposition due to a tender of shares in a change of control transaction
|
Direct |
23,546
-100.0%
|
-
|
|
Oct 27
2025
|
Mohan Bala SVP, Chief Development |
SELL
Open market or private sale
|
Direct |
77
-2.57%
|
$693
$9.9 P/Share
|
|
Oct 25
2025
|
Mohan Bala SVP, Chief Development |
BUY
Exercise of conversion of derivative security
|
Direct |
250
+7.69%
|
-
|
|
Sep 12
2025
|
Martin H. Huber Jr. President, CEO |
SELL
Open market or private sale
|
Direct |
2,012
-17.37%
|
$14,084
$7.31 P/Share
|
Last 12 Months Summary
| Exercise of conversion of derivative security | 222K shares |
|---|
| Disposition due to a tender of shares in a change of control transaction | 427K shares |
|---|---|
| Open market or private sale | 85.7K shares |