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MRSN

Mersana Therapeutics

Delisted

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

77 hedge funds and large institutions have $162M invested in Mersana Therapeutics in 2019 Q2 according to their latest regulatory filings, with 20 funds opening new positions, 33 increasing their positions, 13 reducing their positions, and 6 closing their positions.

New
Increased
Maintained
Reduced
Closed

233% more first-time investments, than exits

New positions opened: 20 | Existing positions closed: 6

154% more repeat investments, than reductions

Existing positions increased: 33 | Existing positions reduced: 13

18% more funds holding

Funds holding: 6577 (+12)

0.25% more ownership

Funds ownership: 3.1%3.35% (+0.25%)

0% more funds holding in top 10

Funds holding in top 10: 22 (0)

17% less capital invested

Capital invested by funds: $194M → $162M (-$32.4M)

Holders
77
Holders Change
+12
Holders Change %
+18.46%
% of All Funds
1.67%
Holding in Top 10
2
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
0.04%
New
20
Increased
33
Reduced
13
Closed
6
Calls
Puts
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
Two Sigma Investments
51
Two Sigma Investments
New York
$120K -$185K -1,567 -57%
M&T Bank
52
M&T Bank
New York
$115K -$47.9K -407 -26%
Barclays
53
Barclays
United Kingdom
$115K +$69.5K +590 +109%
Manulife (Manufacturers Life Insurance)
54
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$113K +$131K +1,112 New
PWLP
55
Prio Wealth Limited Partnership
Massachusetts
$95K
Ohio Public Employees Retirement System (OPERS)
56
Ohio Public Employees Retirement System (OPERS)
Ohio
$94K +$110K +932 New
AIG
57
American International Group
New York
$92K +$69.7K +592 +184%
ARTA
58
A.R.T. Advisors
New York
$83K -$26K -221 -21%
CSS
59
Cubist Systematic Strategies
Connecticut
$61K +$3.89K +33 +6%
Walleye Capital
60
Walleye Capital
New York
$57K +$66K +560 New
Russell Investments Group
61
Russell Investments Group
United Kingdom
$56K +$19.3K +164 +42%
JG
62
Jefferies Group
New York
$56K +$65K +552 New
Walleye Trading
63
Walleye Trading
New York
$54K +$63.1K +536 New
VOYA Investment Management
64
VOYA Investment Management
Georgia
$53K +$61.6K +523 New
AllianceBernstein
65
AllianceBernstein
Tennessee
$53K +$61.7K +524 New
Two Sigma Advisers
66
Two Sigma Advisers
New York
$47K +$54.2K +460 New
Citigroup
67
Citigroup
New York
$37K +$27.2K +231 +170%
UBS Group
68
UBS Group
Switzerland
$30K +$28.3K +240 +400%
Legal & General Group
69
Legal & General Group
United Kingdom
$24K +$19.2K +163 +212%
Wells Fargo
70
Wells Fargo
California
$19K -$4.48K -38 -17%
TRCT
71
Tower Research Capital (TRC)
New York
$14K +$8.48K +72 +116%
BNP Paribas Financial Markets
72
BNP Paribas Financial Markets
France
$12.7K +$2.24K +19 +18%
Bank of Montreal
73
Bank of Montreal
Ontario, Canada
$12K +$14.3K +121 New
Royal Bank of Canada
74
Royal Bank of Canada
Ontario, Canada
$6K +$7.42K +63 New
AIP
75
Ameritas Investment Partners
Nebraska
$4K