MRSN

Mersana Therapeutics

MRSN

Market cap $145M

Delisted

MRSN was delisted on the 5th of January, 2026.

49 hedge funds and large institutions have $24.7M invested in Mersana Therapeutics in 2025 Q3 according to their latest regulatory filings, with 5 funds opening new positions, 17 increasing their positions, 22 reducing their positions, and 39 closing their positions.

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New

Increased

Maintained

Reduced

Closed

more ownership

Funds ownership: →

more capital invested

Capital invested by funds: $ → $

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less funds holding

Funds holding: →

87% less first-time investments, than exits

New positions opened: 5 | Existing positions closed: 39

Holders

Holders Change

Holders Change %

% of All Funds

Holding in Top 10

Holding in Top 10 Change

Holding in Top 10 Change %

% of All Funds

New

Increased

Reduced

Closed

Calls

$61K

Puts

–

Net Calls

Net Calls Change

Top Buyers

1		+$3.05M
2		+$492K
3		+$359K
4	SSA Schonfeld Strategic Advisors New York	+$350K
5	Morgan Stanley New York	+$255K

Top Sellers

1		-$1.19M
2		-$464K
3		-$424K
4	BlackRock New York	-$408K
5	Jacobs Levy Equity Management Florham Park, New Jersey	-$395K

#	Name	Holding
51	51	–
52	52	–
53	53	–
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63	63	–
64	64	–
65	65	–
66	66	–
67	67	–
68	68	–
69	69	–
70	70	–
71	71	–
72	72	–
73	73	–
74	74	–
75	75	–

#	Name	Holding
51	51	–
52	52	–
53	53	–
54	54	–
55	55	–
56	56	–
57	57	–
58	58	–
59	59	–
60	60	–
61	61	–
62	62	–
63	63	–
64	64	–
65	65	–
66	66	–
67	67	–
68	68	–
69	69	–
70	70	–
71	71	–
72	72	–
73	73	–
74	74	–
75	75	–

#	Name	Holding
51	51	–
52	52	–
53	53	–
54	54	–
55	55	–
56	56	–
57	57	–
58	58	–
59	59	–
60	60	–
61	61	–
62	62	–
63	63	–
64	64	–
65	65	–
66	66	–
67	67	–
68	68	–
69	69	–
70	70	–
71	71	–
72	72	–
73	73	–
74	74	–
75	75	–

Mersana Therapeutics MRSN Market cap $145M