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Tourmaline Bio
TRML

Overview Fund Activity

107 hedge funds and large institutions have $364M invested in Tourmaline Bio in 2025 Q1 according to their latest regulatory filings, with 19 funds opening new positions, 34 increasing their positions, 31 reducing their positions, and 12 closing their positions.

Holders
107
Holders Change
+6
Holders Change %
+5.94%
% of All Funds
1.45%
Holding in Top 10
6
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+20%
% of All Funds
0.08%
New
19
Increased
34
Reduced
31
Closed
12
Calls
$3.09M
Puts
$93K
Net Calls
+$3M
Net Calls Change
+$3.16M

Top Buyers

1
OCA
1
Octagon Capital Advisors
New York
$13.8M
2
QF
2
QVT Financial
New York
$22.4M
3
Balyasny Asset Management
3
Balyasny Asset Management
Illinois
$9.02M
4
Fidelity Investments
4
Fidelity Investments
Massachusetts
$3.71M
5
ACA
5
Avoro Capital Advisors
New York
$36.9M

Top Sellers

1
RI
1
RTW Investments
New York
$0
2
Jennison Associates
2
Jennison Associates
New York
$1.8M
3
State Street
3
State Street
Massachusetts
$6.83M
4
SC
4
Stempoint Capital
New York
$0
5
Adage Capital Partners
5
Adage Capital Partners
Massachusetts
$7.61M
Name Market Value Shares Shares
Change 		Shares
Change %
RCM
1
RA Capital Management
Massachusetts
$38.6M 2,538,925 – –
ACA
2
Avoro Capital Advisors
New York
$36.9M 2,425,000 +202,778 +9%
BlackRock
3
BlackRock
New York
$27.3M 1,792,208 -11,692 -0.6%
TCM
4
TCG Crossover Management
California
$22.5M 1,477,593 – –
QF
5
QVT Financial
New York
$22.4M 1,473,369 +762,094 +107%
P
6
Pfizer
New York
$19.4M 1,272,214 – –
Vanguard Group
7
Vanguard Group
Pennsylvania
$18.1M 1,190,810 +84,685 +8%
BOCH
8
Blue Owl Capital Holdings
New York
$15.8M 1,037,107 -42,214 -4%
OCA
9
Octagon Capital Advisors
New York
$13.8M 905,000 +905,000 New
QUSVM
10
Qiming U.S. Ventures Management
Washington
$11.3M 741,691 – –
Balyasny Asset Management
11
Balyasny Asset Management
Illinois
$9.02M 592,975 +592,975 New
VC
12
Vivo Capital
California
$9M 591,882 – –
Citadel Advisors
13
Citadel Advisors
Florida
$8.68M 570,588 -77,530 -12%
NCM
14
Nantahala Capital Management
Connecticut
$8.1M 532,824 -4,120 -0.8%
Adage Capital Partners
15
Adage Capital Partners
Massachusetts
$7.61M 500,000 -100,000 -17%
Geode Capital Management
16
Geode Capital Management
Massachusetts
$7.55M 496,120 +14,511 +3%
VCIM
17
Velan Capital Investment Management
Georgia
$6.93M 455,412 +31,617 +7%
State Street
18
State Street
Massachusetts
$6.83M 449,161 -351,032 -44%
ACP
19
Acuta Capital Partners
California
$6.49M 426,882 +75,040 +21%
Pictet Asset Management
20
Pictet Asset Management
Switzerland
$6.39M 419,883 – –
SSA
21
Schonfeld Strategic Advisors
New York
$4.56M 299,739 +1,500 +0.5%
Morgan Stanley
22
Morgan Stanley
New York
$4.35M 285,745 +81,463 +40%
Millennium Management
23
Millennium Management
New York
$4.09M 268,738 -95,920 -26%
Fidelity Investments
24
Fidelity Investments
Massachusetts
$3.71M 243,721 +208,234 +587%
Bank of America
25
Bank of America
North Carolina
$3.6M 236,747 +166,010 +235%
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