SION - Sionna Therapeutics, Inc.

Across the last three months, Sionna Therapeutics, Inc.'s insiders have reduced their positions by a net 3,448,811 shares worth roughly $21.8M.

Classified under Biotechnology (Health Care sector), SION's insider flows are most useful compared with peers in the same group.

Insider Ownership

Role	Insider	Shares	Value	30d
10%	Tpg GP A, LLC	6.49M	$259.80M	-
10%	Ra Capital Management, L.P.	3.45M	$25.73M	-
Dir	Orbimed Advisors LLC	2.47M	$110.80M	-
Dir	Thompson Peter A.	2.47M	$110.80M	-
CEO	Cloonan Michael	765.4K	-	-

Buys and sells only

10 filings

Date	Insider	Role	Type	Shares	Price	Value	Chg%	3M	12M
Sep 17, 2026	Ra Capital Management, L.P.52	Director, 10% Owner	Sell	3,448,811	$6.33	$21,835,017.52	-50.0%	-	-
Jul 7, 2026	Thompson Peter A.63	Director	Sell	85,918	$44.86	$3,854,281.48	-3.4%	-89.2%	-
Jul 7, 2026	Orbimed Advisors LLC66	Director	Sell	85,918	$44.86	$3,854,281.48	-3.4%	-89.2%	-
Jul 6, 2026	Fitzpatrick Jennifer	Chief Legal Officer	Sale+OE	10,250	$43.60	$446,862.08	-	-88.8%	-
Jun 30, 2026	Thompson Peter A.63	Director	Sell	115,844	$45.50	$5,270,902.00	-4.3%	-88.4%	-
Jun 30, 2026	Orbimed Advisors LLC66	Director	Sell	115,844	$45.50	$5,270,902.00	-4.3%	-88.4%	-
May 27, 2026	Orbimed Advisors LLC66	Director	Sell	101	$44.49	$4,493.49	-	-85.6%	-
May 27, 2026	Thompson Peter A.63	Director	Sell	101	$44.49	$4,493.49	-	-85.6%	-
May 11, 2026	Orbimed Advisors LLC66	Director	Sell	292,952	$45.62	$13,364,064.50	-9.9%	-90.2%	-
May 11, 2026	Thompson Peter A.63	Director	Sell	292,952	$45.62	$13,364,064.50	-9.9%	-90.2%	-