Sionna Therapeutics, Inc. - Common Stock, $0.001 par value per share (SION)

Historical Holders from Q1 2025 to Q3 2025

Symbol
SION on Nasdaq
CUSIP
829401108
Type / Class
Equity / Common Stock, $0.001 par value per share
Shares outstanding
44.6M
All holders as of September 30, 2025
Q3 2025
Total 13F shares, excl. options
42.8M
Holdings value
$1.26B
% of all portfolios
0.002%
Grand Portfolio weight change
0%
Number of holders
77
Number of buys
37
Number of sells
-25
Average Value change %
0%
Average buys %
+0%
Average sells %
0%
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Sionna Therapeutics, Inc. - Common Stock, $0.001 par value per share (SION)

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
RA CAPITAL MANAGEMENT, L.P. 22.6% -4.58% $296M -$11M 10.1M -3.58% RA Capital Management, L.P. Nov 5, 2025
TPG GP A, LLC 15.2% $51.2M 6.68M TPG GP A, LLC Feb 10, 2025
ORBIMED ADVISORS LLC 8.4% $28.4M 3.7M ORBIMED ADVISORS LLC Feb 10, 2025
VIKING GLOBAL INVESTORS LP 6.7% $22.6M 2.95M VIKING GLOBAL INVESTORS LP Feb 10, 2025
Enavate Sciences GP, LLC 5.6% $19M 2.48M Enavate Sciences GP, LLC Feb 10, 2025
Atlas Venture Fund XI, L.P. 5.4% -15.7% $74.7M -$15.8M 2.38M -17.5% Atlas Venture Fund XI, L.P. Oct 16, 2025
Qatar Investment Authority 5% $28.4M 2.21M Qatar Investment Authority Jun 11, 2025
JPMORGAN CHASE & CO 4.4% -12% $58.3M -$7.08M 1.98M -10.8% JPMORGAN CHASE & CO. Sep 30, 2025

Institutional Holders of Sionna Therapeutics, Inc. - Common Stock, $0.001 par value per share (SION)

Period Reported Shares, Excl. Options Value, Excl. Options Change Price Investors
2025 Q3 42.8M $1.26B -$14.7M $29.41 77
2025 Q2 43.4M $754M +$37.3M $17.35 65
2025 Q1 41.5M $434M +$434M $10.46 47