How many insider trades does FilingIQ track for SION?

FilingIQ tracks 199 Form 4 insider transactions for SION (Sionna Therapeutics, Inc.), covering filings from Feb 10, 2025 onwards. 19 of those were filed in the last 90 days.

Are SION insiders net buyers or net sellers?

Across the full Form 4 history for SION, 8 transactions (4%) were open-market purchases and 150 (75%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.

Where does SION insider data come from?

Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.

What sector is SION in?

Sionna Therapeutics, Inc. (SION) is classified in the Healthcare sector, specifically Biotechnology, with a current market capitalisation of $1.67B.

SION insider trading

Healthcare

Sionna Therapeutics, Inc. — scored insider trade history from SEC Form 4 filings, parsed and contextualised by FilingIQ.

Total Form 4 trades

199

Last 90 days

Buys / sells

4% / 75%

Market cap

$1.67B

About Sionna Therapeutics, Inc.

Sionna Therapeutics, Inc., a clinical-stage biopharmaceutical company, researches and develops medicines for the treatment of cystic fibrosis (CF). It develops galicaftor (SION-2222), a transmembrane domain 1 (TMD1)-directed cystic fibrosis transmembrane conductance regulator (CFTR) that has completed Phase 2 trial; navocaftor (SION-3067), a potentiator that has completed Phase 2 trial; SION-109, an intracellular loop 4 directed CFTR corrector that has completed Phase 1 trial; SION-2851, a TMD1-directed CFTR corrector that has completed Phase 1 trial; and SION-719 and SION-451, which are nucleotide-binding domain 1 stabilizers in Phase 1 trial. The company was formerly known as Sling Therapeutics, Inc. and changed its name to Sionna Therapeutics, Inc. in July 2021. Sionna Therapeutics, Inc. was incorporated in 2019 and is headquartered in Waltham, Massachusetts.

Company website: www.sionnatx.com

SION insider activity at a glance

FilingIQ has scored 199 insider transactions for SION since Feb 10, 2025. The most recent filing in our index is dated May 11, 2026.

Across the full history, 8 open-market purchases and 150 open-market sales were filed under transaction codes P and S respectively. Compensatory share awards (code A) and option exercises (code M) are tracked separately and not counted here.

The average FilingIQ composite score on SION insider trades is 51.7/100, produced by FilingIQ's multi-factor Form 4 model. Model framework documented at methodology.

View live SION trades on FilingIQ Raw filings on SEC EDGAR

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Frequently asked

How many insider trades does FilingIQ track for SION?: FilingIQ tracks 199 Form 4 insider transactions for SION (Sionna Therapeutics, Inc.), covering filings from Feb 10, 2025 onwards. 19 of those were filed in the last 90 days.
Are SION insiders net buyers or net sellers?: Across the full Form 4 history for SION, 8 transactions (4%) were open-market purchases and 150 (75%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.
Where does SION insider data come from?: Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.
What sector is SION in?: Sionna Therapeutics, Inc. (SION) is classified in the Healthcare sector, specifically Biotechnology, with a current market capitalisation of $1.67B.

Methodology & sources

Every SION insider transaction shown on FilingIQ is parsed directly from a public SEC Form 4 XML filing. Insider identity is normalised across reporting variants (CIK changes, name spellings, related-party indirect holdings). The FilingIQ composite score is documented in full on the team page and algo disclosure. Not investment advice; see disclaimer.