Type / Class
Equity / Common Stock, $0.0001 par value per share
Shares outstanding
4,998,537
Total 13F shares
3,128,210
Share change
+2,899,340
Total reported value
$24,272,592
Price per share
$7.76
Number of holders
45
Value change
+$24,189,774
Number of buys
43
Number of sells
2

Institutional Holders of Mersana Therapeutics, Inc. - Common Stock, $0.0001 par value per share (MRSN) as of Q3 2025

As of 30 Sep 2025, Mersana Therapeutics, Inc. - Common Stock, $0.0001 par value per share (MRSN) was held by 45 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 3,128,210 shares. The largest 10 holders included Nextech Invest, Ltd., Alamea Verwaltungs GmbH, Bain Capital Life Sciences Investors, LLC, VANGUARD GROUP INC, Schonfeld Strategic Advisors LLC, Rock Springs Capital Management LP, ACADIAN ASSET MANAGEMENT LLC, SILVERARC CAPITAL MANAGEMENT, LLC, 683 Capital Management, LLC, and BlackRock, Inc.. This page lists 45 institutional shareholders reporting positions in this security for the Q3 2025 filing period.
Investor Option Weight % Change % Value $ * Price Shares Share Change Activity Report Period
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.