Sionna Therapeutics, Inc.

SEC insider activity covers quarterly filings through June 30, 2026. Later filings are not included. Reported roles do not establish current employment or current holdings. SEC filing documents, sections and filing-text search cover filings dated January 1, 2000 onward. Earlier filings are deferred until after launch.

SION

organization

SIC: 2834

SEC Insider

$220.8M

259 transactions

Summary

Sionna Therapeutics, Inc. (SION) is an organization.

Recent Insider Transactions

As filed, including amendments; not net cash flow or current holdings. Joint reports count once. Totals cover known values only.

Buys: $63.4MSales: $155.9M30 insiders

Date	Insider	Type	Value
2026-05-11	Joint reporting: ORBIMED ADVISORS LLC; OrbiMed Capital GP VIII LLC	Sell	$8.5M
2026-05-11	Thompson Peter A.	Sell	$8.5M
2026-05-08	Joint reporting: ORBIMED ADVISORS LLC; OrbiMed Capital GP VIII LLC	Sell	$2.7M
2026-05-08	Thompson Peter A.	Sell	$2.7M
2026-04-17	Joint reporting: ORBIMED ADVISORS LLC; OrbiMed Capital GP VIII LLC	Sell	$2.3M
2026-05-07	Joint reporting: ORBIMED ADVISORS LLC; OrbiMed Capital GP VIII LLC	Sell	$2.2M
2026-05-07	Thompson Peter A.	Sell	$2.2M
2026-04-18	Joint reporting: ORBIMED ADVISORS LLC; OrbiMed Capital GP VIII LLC	Sell	$131K
2026-04-18	Thompson Peter A.	Sell	$131K
2026-05-27	Joint reporting: ORBIMED ADVISORS LLC; OrbiMed Capital GP VIII LLC	Sell	$4K
2026-05-27	Thompson Peter A.	Sell	$4K
2026-06-17	Joint reporting: RA Capital Healthcare Fund LP; RA CAPITAL MANAGEMENT, L.P.; Kolchinsky Peter; Shah Rajeev M.; RA Capital Nexus Fund, L.P.; RA Capital Nexus Fund III, L.P.	A	$0
2026-06-17	Thompson Peter A.	A	$0
2026-06-17	Clancy Paul J	A	$0
2026-06-17	Booth Bruce	A	$0
2026-06-17	Stelzer Laurie	A	$0
2026-06-17	Resnick Joshua	A	$0
2026-06-17	Viney Joanne L.	A	$0
2026-06-17	Fleming Harold Edward	A	$0
2026-06-17	Ruddy Marcella K.	A	$0

SEC filings: SEC EDGAR

Activity data: SEC EDGAR

Sionna Therapeutics, Inc. — Contributions, Lobbying & Contracts | Poliscope