Mersana Therapeutics, Inc. - Common Stock, par value $0.0001 per share (MRSN)

Historical Holders from Q2 2025 to Q3 2025

Symbol
MRSN on Nasdaq
CUSIP
59045L205
Type / Class
Equity / Common Stock, par value $0.0001 per share
Shares outstanding
4.97M
All holders as of September 30, 2025
Q3 2025
Total 13F shares, excl. options
3.13M
Holdings value
$24.3M
% of all portfolios
0.001%
Grand Portfolio weight change
+0%
Number of holders
44
Number of buys
41
Number of sells
-2
Average Value change %
+0%
Average buys %
+0.001%
Average sells %
0%
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Mersana Therapeutics, Inc. - Common Stock, par value $0.0001 per share (MRSN)

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Bain Capital Life Sciences Fund II, L.P. 4% $1.52M 199K BCLS II Investco, LP Nov 12, 2025

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

Period Reported Shares, Excl. Options Value, Excl. Options Change Price Investors
2025 Q3 3.13M $24.3M +$24.2M $7.76 44
2025 Q2 228K $68.5K +$68.5K $0.30 2