SION

Sionna Therapeutics
SION

47 hedge funds and large institutions have $434M invested in Sionna Therapeutics in 2025 Q1 according to their latest regulatory filings, with 47 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.

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New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership: →

Holders
47
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
2
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
–
Puts
–
Net Calls
Net Calls Change

Top Buyers

1
+$109M
2
+$69.9M
3
+$38.8M
4
AVLSA
Atlas Venture Life Science Advisors
Massachusetts
+$38.6M
5
Viking Global Investors
Viking Global Investors
Connecticut
+$30.9M

Top Sellers

No sellers this quarter
Name Holding Trade Value Shares
Change 		Change in
Stake
1
$109M
2
$69.9M
3
$38.8M
4
$38.6M
5
$30.9M
6
$25.9M
7
$22.7M
8
$13.1M
9
$10.4M
10
$8.99M
11
$7.81M
12
$7.8M
13
$5.71M
14
$5.23M
15
$4.18M
16
$3.44M
17
$3.42M
18
$3.4M
19
$2.51M
20
$2.48M
21
$2.19M
22
$2.08M
23
$1.95M
24
$1.87M
25
$1.42M
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