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

Historical Holders from Q1 2025 to Q3 2025

Symbol
SION on Nasdaq
Type / Class
Equity / Common Stock, $0.001 par value per share
Shares outstanding
44,565,097
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares, excl. options
42,840,564
Holdings value
$1,259,943,482
% of all portfolios
0%
Number of holders
78
Number of buys
38
Number of sells
-25
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% $296,218,114 -$10,988,206 10,071,712 -3.58% RA Capital Management, L.P. 05 Nov 2025
TPG GP A, LLC 15.2% $80,486,942 6,684,962 TPG GP A, LLC 10 Feb 2025
ORBIMED ADVISORS LLC 8.4% $44,607,706 3,704,959 ORBIMED ADVISORS LLC 10 Feb 2025
VIKING GLOBAL INVESTORS LP 6.7% $35,551,158 2,952,754 VIKING GLOBAL INVESTORS LP 10 Feb 2025
Enavate Sciences GP, LLC 5.6% $29,835,481 2,478,030 Enavate Sciences GP, LLC 10 Feb 2025
Atlas Venture Fund XI, L.P. 5.4% -15.7% $74,744,824 -$15,805,403 2,382,495 -17.5% Atlas Venture Fund XI, L.P. 16 Oct 2025
Qatar Investment Authority 5% $28,351,413 2,209,775 Qatar Investment Authority 11 Jun 2025
JPMORGAN CHASE & CO 4.4% -12% $58,251,993 -$7,075,145 1,980,626 -10.8% JPMORGAN CHASE & CO. 30 Sep 2025

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

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price Investors
2025 Q3 42,840,564 $1,259,943,482 -$14,718,322 $29.41 78
2025 Q2 43,448,393 $753,831,077 +$37,292,994 $17.35 65
2025 Q1 41,491,947 $434,056,422 +$434,056,422 $10.46 47