Stocks · Health care · Pharmaceutical Preparations

Sionna Therapeutics, Inc.

SION Clue Score29
United States Fiscal year ends December CIK 0002036042 Results filed 6 Aug 2026

What the insiders did Net buying

By person

10 insiders · 168 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Orbimed Advisors LLC entity
Director
$9.90M (1)
$55.67M (20) scheduled
−$45.77M
2,469,959
5.46%
$18.43M
—
Peter A. Thompson
Director
$9.90M (1)
$55.67M (20) scheduled
−$45.77M
2,469,959
5.46%
$18.43M
—
Ra Capital Management, L.p. entity
Director
$20.25M (2)
$43.30M (46)
−$23.05M
318,066
0.7035%
$2.37M
—
Bruce Booth
Director
$1.08M (1)
$22.09M (50) scheduled
−$21.01M
686,567
1.52%
$5.12M
—
Tpg Gp A, LLC entity
10% owner
$21.20M (2)
$10.00M (1)
+$11.20M
6,494,962
14.37%
$48.45M
+849.0%
Michael Cloonan
President & CEO
—
$6.33M (12) scheduled
−$6.33M
765,393
1.69%
$5.71M
+39.8%
Elena Ridloff
CFO and CBO
—
$1.97M (7) scheduled
−$1.97M
133,069
0.2943%
$992.69K
+7.7%
Jennifer Fitzpatrick
CLO and Head of Program Mgmt.
—
$1.45M (4) scheduled
−$1.45M
56,265
0.1244%
$419.74K
—
Atlas Venture Fund XI, L.P. entity
10% owner
$1.08M (1)
—
+$1.08M
3,694,020
8.17%
$27.56M
—
Charlotte McKee
CMO and Head of R&D
—
—
—
128,415
0.2840%
$957.98K
+351.9%