SION

Sionna Therapeutics, Inc.

Latest Form 4:Sale$3.9MbyThompson Peter A. (Director) · filed Jul 9, 2026

Sionna Therapeutics, Inc. (SION) has 37 SEC Form 4 filings (163 transaction rows) in the rolling window, disclosed by 8 distinct insiders. Most recent filing: Jul 9, 2026.

The most active filer is Director Thompson Peter A. with 20 filings. Insiders have net sold $109.4M over the trailing 6 months.

  • Industry:Biotechnology
  • CEO:Michael Cloonan
  • Employees:59
  • HQ:Waltham, MA, US
  • IPO:2025-02-07

Insider Buying

$0

reported purchases (SEC code P)

Insider Selling

$171.7M

reported sales (SEC code S)

Unique Insiders

8

in the rolling window

Market Cap

$265.4M

latest known value

Source
Sale$3.9MJul 9SEC ↗
Sale$3.9MJul 9SEC ↗
Fitzpatrick JenniferFirst in 4 months
Sale$447KJul 7SEC ↗
Sale$5.3MJul 2SEC ↗
Sale$5.3MJul 2SEC ↗
Sale$4KMay 30SEC ↗
Sale$4KMay 30SEC ↗
Sale$2.2MMay 11SEC ↗
Sale$2.7MMay 11SEC ↗
Sale$8.5MMay 11SEC ↗
Sale$2.2MMay 11SEC ↗
Sale$2.7MMay 11SEC ↗
Sale$8.5MMay 11SEC ↗
Sale$2.3MApr 21SEC ↗
Sale$131KApr 21SEC ↗
Sale$2.3MApr 21SEC ↗
Sale$131KApr 21SEC ↗
Sale$2.1MApr 16SEC ↗
Sale$10.5MApr 16SEC ↗
Sale$10.3MApr 16SEC ↗
Sale$2.1MApr 16SEC ↗
Sale$10.5MApr 16SEC ↗
Sale$10.3MApr 16SEC ↗
Sale$347KMar 6SEC ↗
Sale$84KFeb 4SEC ↗
Sale$1.3MFeb 4SEC ↗
Sale$84KFeb 4SEC ↗
Sale$1.3MFeb 4SEC ↗
TPG GP A, LLCFirst filing
Sale$10.0MJan 26SEC ↗
Sale$1.5MDec 29SEC ↗
Sale$1.5MDec 29SEC ↗
Sale$40KDec 19SEC ↗
Sale$4KDec 19SEC ↗
Sale$39KDec 19SEC ↗
Sale$40KDec 19SEC ↗
Sale$4KDec 19SEC ↗
Sale$39KDec 19SEC ↗
Fitzpatrick JenniferFirst in 3 months
Sale$415KDec 9SEC ↗
Thompson Peter A.First filing
Sale$4.2MNov 26SEC ↗
Thompson Peter A.First filing
Sale$530KNov 26SEC ↗
Thompson Peter A.First filing
Sale$71KNov 26SEC ↗
Sale$4.2MNov 26SEC ↗
Sale$530KNov 26SEC ↗
Sale$71KNov 26SEC ↗
Sale$206KNov 24SEC ↗
Sale$995KNov 24SEC ↗
Sale$3.3MNov 19SEC ↗
Sale$274KNov 19SEC ↗
Sale$1.9MNov 19SEC ↗
Sale$12.3MOct 28SEC ↗
Sale$2.5MOct 28SEC ↗
Sale$3.6MOct 22SEC ↗
Sale$3.0MOct 21SEC ↗
Sale$5.5MOct 20SEC ↗
Sale$2.0MOct 20SEC ↗
Sale$1.8MOct 20SEC ↗
Sale$460KOct 17SEC ↗
Sale$328KOct 17SEC ↗
Sale$607KOct 15SEC ↗
Sale$1.8MOct 15SEC ↗
Sale$18KOct 15SEC ↗
Sale$3.5MOct 15SEC ↗
Sale$1.1MOct 7SEC ↗
Sale$353KOct 7SEC ↗
Booth BruceFirst filing
Sale$2.0MOct 1SEC ↗
Booth BruceFirst filing
Sale$372KOct 1SEC ↗
Booth BruceFirst filing
Sale$6KOct 1SEC ↗
Cloonan MichaelFirst filing
Sale$496KSep 30SEC ↗
Cloonan MichaelFirst filing
Sale$231KSep 30SEC ↗
Sale$237KSep 5SEC ↗
Ridloff ElenaFirst filing
Sale$19KSep 3SEC ↗
Ridloff ElenaFirst filing
Sale$222KSep 3SEC ↗

Related companies

Sionna Therapeutics, Inc. is in the Healthcare sector.