MBX

MBX Biosciences, Inc. Common Stock
MBX

Overview Fund Activity

79 hedge funds and large institutions have $263M invested in MBX Biosciences, Inc. Common Stock in 2025 Q1 according to their latest regulatory filings, with 27 funds opening new positions, 24 increasing their positions, 15 reducing their positions, and 10 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
79
Holders Change
+16
Holders Change %
+25.4%
% of All Funds
1.07%
Holding in Top 10
1
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-66.67%
% of All Funds
0.01%
New
27
Increased
24
Reduced
15
Closed
10
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
MB
MPM BioImpact
Massachusetts
$8.36M
2
WP
Woodline Partners
California
$6.48M
3
OM
Opaleye Management
Massachusetts
$1.85M
4
JPMorgan Chase & Co
JPMorgan Chase & Co
New York
$1.49M
5
O
OrbiMed
New York
$29.5M

Top Sellers

1
Citadel Advisors
Citadel Advisors
Florida
$0
2
Alyeska Investment Group
Alyeska Investment Group
Illinois
$0
3
Wellington Management Group
Wellington Management Group
Massachusetts
$19.5M
4
Millennium Management
Millennium Management
New York
$1.26M
5
TRSOTSOK
Teachers Retirement System of the State of Kentucky
Kentucky
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
FLSM
1
Frazier Life Sciences Management
California
$44.2M – – –
O
2
OrbiMed
New York
$29.5M +$1.41M +190,672 +5%
NMC
3
NEA Management Company
Maryland
$26.7M – – –
DTC
4
Deep Track Capital
Connecticut
$22.3M – – –
Wellington Management Group
5
Wellington Management Group
Massachusetts
$19.5M -$2M -271,118 -9%
NA
6
NVP Associates
California
$15.8M – – –
DCM
7
Driehaus Capital Management
Illinois
$11.7M -$18.8K -2,553 -0.2%
RCM
8
RA Capital Management
Massachusetts
$11.2M – – –
EC
9
EcoR1 Capital
California
$9.29M – – –
MB
10
MPM BioImpact
Massachusetts
$8.36M +$8.36M +1,132,950 New
T. Rowe Price Associates
11
T. Rowe Price Associates
Maryland
$8.13M -$447K -60,611 -5%
WP
12
Woodline Partners
California
$6.48M +$1.98M +268,740 +44%
BlackRock
13
BlackRock
New York
$5.78M +$407K +55,090 +8%
CAM
14
Cormorant Asset Management
Massachusetts
$5.17M – – –
Vanguard Group
15
Vanguard Group
Pennsylvania
$4.91M -$39.7K -5,385 -0.8%
TCM
16
TCG Crossover Management
California
$4.8M – – –
Franklin Resources
17
Franklin Resources
California
$2.73M +$111 +15 +0%
PHP
18
Parkman Healthcare Partners
Connecticut
$2.42M +$1.17M +158,323 +93%
Geode Capital Management
19
Geode Capital Management
Massachusetts
$2.03M +$64.6K +8,755 +3%
OM
20
Opaleye Management
Massachusetts
$1.85M +$1.85M +250,000 New
JPMorgan Chase & Co
21
JPMorgan Chase & Co
New York
$1.49M +$1.42M +192,129 +2,110%
SSA
22
Schonfeld Strategic Advisors
New York
$1.48M +$953K +129,142 +181%
PIM
23
Platinum Investment Management
Australia
$1.37M +$176K +23,842 +15%
State Street
24
State Street
Massachusetts
$1.31M +$255K +34,571 +24%
AAA
25
Affinity Asset Advisors
New York
$1.29M +$1.29M +175,000 New
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