ActivistsInvestorsTrumpPoliticiansSerenityCitriniBurrySemianalysisSwingTradeArbitrageSearch

$SION:NASDAQ · Sionna Therapeutics Inc - US

Sionna Therapeutics, Inc., a clinical-stage biopharmaceutical company, researches and develops medicines for the treatment of cystic fibrosis (CF).

More about this company

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; SION-451, which is nucleotide-binding domain 1 stabilizer in Phase 1 trial; and SION-719, which is nucleotide-binding domain 1 stabilizer in Phase 2a proof-of-concept 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.

Sector: health

Conviction from: NASDAQ

52-week range: 4.0154.97

2 tracked filer(s) hold this · 1 opened, 0 added, 1 trimmed in 30-JUN-2026

Aggregate 13FScore 72 — mean of 2 scored holder(s) · buyers (new/add) avg 63. Higher = the smart money in this name has the better track record.

Filer13FScoreThis quarterSharesValue% of their book
Paul Tudor Jones / Tudor63New buy22,575$993,0740.0%
Steve Cohen / Point7280Trimmed -64%49,328$2,169,9390.0%

Beyond 13F — activists, insiders, politicians & research

Activist 13D filings daily digest →

FiledFormActivist% of classConviction
2026-04-20SCHEDULE 13D/AORBIMED ADVISORS LLC6.6%Medfiling

Every tracked holder of this name, sorted new → added → flat → trimmed. Shares = reported 13F share count; Value as reported (a few managers file values in $thousands). Generated 2026-08-17.