SION Stock Ownership Activity

SIONNA THERAPEUTICS INC 13F holders

1 value investing guru has made changes to the SIONNA THERAPEUTICS INC (SION) position according to the gurus' latest SEC quarterly report(s). The number of SION shares has been decreased by 1 super investor(s).

Which gurus or hedge funds are buying SION now?

According to the latest SEC filing(s) SIONNA THERAPEUTICS INC (SION) has not been purchased by any super investor.

To see more about who is investing in SIONNA THERAPEUTICS INC (SION), please go to the SION ownership page.

History
Name
Company
%
Activity
Share
Change
% change to
Portfolio
% of
Portfolio
2026 Q1 (1 result)
David M. Polen
Polen Capital Management
-14.34%
-4,483
-0.00%
0.01%
Current price: $36.70 8.46% Reported price*: $40.09
2025 Q3 (1 result)
David M. Polen
Polen Capital Management
+84.14%
+14,283
+0.00%
0.00%
Current price: $36.70 24.79% Reported price*: $29.41
2025 Q2 (2 results)
David M. Polen
Polen Capital Management
buy
+16,975
+0.00%
0.00%
Ole Andreas Halvorsen
Viking Global Investors
+8.21%
+242,427
+0.01%
0.16%
Current price: $36.70 111.53% AVG reported price*: $17.35
2025 Q1 (1 result)
Ole Andreas Halvorsen
Viking Global Investors
buy
+2,952,754
+0.10%
0.10%
Current price: $36.70 250.86% Reported price*: $10.46
5 of 5

Shares, change to shares, sold shares - split-adjusted.

Reported price - this doesn't represent the actual buy or sell price.
It is the split-adjusted price of the security as of the last day of the reported period.

Value or Price - If the security is completely sold out, we show the reported value (or price) prior to the actual period.