MREO

Mereo BioPharma
MREO

Overview Fund Activity

89 hedge funds and large institutions have $250M invested in Mereo BioPharma in 2025 Q1 according to their latest regulatory filings, with 13 funds opening new positions, 27 increasing their positions, 21 reducing their positions, and 14 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
89
Holders Change
-1
Holders Change %
-1.11%
% of All Funds
1.21%
Holding in Top 10
1
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-50%
% of All Funds
0.01%
New
13
Increased
27
Reduced
21
Closed
14
Calls
$3.5M
Puts
$1.75M
Net Calls
+$1.75M
Net Calls Change
+$564K

Top Buyers

1
Janus Henderson Group
Janus Henderson Group
United Kingdom
+$12.9M
2
FLSM
Frazier Life Sciences Management
California
+$6.12M
3
Aberdeen Group
Aberdeen Group
United Kingdom
+$4.92M
4
SSA
Schonfeld Strategic Advisors
New York
+$2.47M
5
Fidelity Investments
Fidelity Investments
Massachusetts
+$1.71M

Top Sellers

1
Adage Capital Partners
Adage Capital Partners
Massachusetts
-$15.8M
2
Millennium Management
Millennium Management
New York
-$8.03M
3
RSCM
Rock Springs Capital Management
Maryland
-$6.56M
4
UBS Group
UBS Group
Switzerland
-$3.86M
5
Morgan Stanley
Morgan Stanley
New York
-$3.09M
Name Holding Trade Value Shares
Change 		Shares
Change %
SCM
26
Soleus Capital Management
Connecticut
$1.55M -$225K -100,000 -13%
TE
27
Tema ETFs
New York
$1.47M -$531K -235,882 -26%
NIM
28
NEOS Investment Management
Connecticut
$1.47M -$382K -169,937 -21%
Hudson Bay Capital Management
29
Hudson Bay Capital Management
Connecticut
$1.01M +$304K +135,000 +43%
Bank of America
30
Bank of America
North Carolina
$987K +$982K +436,350 +18,808%
AGP
31
Artia Global Partners
Florida
$948K – – –
MAM
32
Monaco Asset Management
Monaco
$937K +$78.8K +35,000 +9%
Millennium Management
33
Millennium Management
New York
$887K -$8.03M -3,571,001 -90%
HP
34
HealthInvest Partners
Sweden
$878K – – –
CF
35
Cantor Fitzgerald
New York
$799K +$293K +130,000 +58%
Citadel Advisors
36
Citadel Advisors
Florida
$773K +$66.8K +29,703 +9%
DMKJ
37
David M. Knott Jr
$719K -$26.2K -11,663 -4%
BlackRock
38
BlackRock
New York
$617K +$3.02K +1,342 +0.5%
KCM
39
Knoll Capital Management
Florida
$586K – – –
Two Sigma Investments
40
Two Sigma Investments
New York
$552K +$397K +176,471 +257%
Susquehanna International Group
41
Susquehanna International Group
Pennsylvania
$392K -$489K -217,212 -55%
Jane Street
42
Jane Street
New York
$326K +$55.2K +24,525 +20%
PAP
43
Persistent Asset Partners
Hong Kong
$255K +$255K +113,247 New
CM
44
Caption Management
Oklahoma
$236K +$236K +104,783 New
BC
45
BIT Capital
Germany
$227K +$227K +101,070 New
Geode Capital Management
46
Geode Capital Management
Massachusetts
$207K – – –
JGC
47
J. Goldman & Co
New York
$179K – – –
DP
48
Diadema Partners
New Jersey
$169K +$169K +492,215 New
GCM
49
Graham Capital Management
Connecticut
$111K +$61.3K +27,229 +123%
FA
50
Forefront Analytics
Pennsylvania
$107K +$29K +12,877 +37%
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