← Insider buys

SION

Sionna Therapeutics, Inc. · Healthcare

Insiders sold $142.8M of Sionna Therapeutics, Inc. in the last 12 months and bought none

$0Bought, 12 mo
$142.8MSold, 12 mo
$184.2MMarket cap

SION over the last year

No insider buys filed in this year

SION after insider buys

3 months after each buy, from the first price a copier could get.

−9.2%Average
−10.6 ptsVs S&P 500
1 of 3Higher

3 buys since 2025 with 3 months of prices.

Every filing

29 insider filings since 2025, newest first

SIONSell

RA CAPITAL MANAGEMENT, L.P. · Director

$21.8M−50.0%Sep 21
SIONSell

Peter A. Thompson · Director

$3.9M−3.4%Jul 9
SIONSell

ORBIMED ADVISORS LLC · Director

$3.9M−3.4%Jul 9
SIONSell

Jennifer Fitzpatrick · Chief Legal Officer

$447K−100.0%Jul 7
SIONSell

Peter A. Thompson · Director

$5.3M−4.3%Jul 2
SIONSell

ORBIMED ADVISORS LLC · Director

$5.3M−4.3%Jul 2
SIONSell

Peter A. Thompson · Director

$13.4M−9.9%May 11
SIONSell

ORBIMED ADVISORS LLC · Director

$13.4M−9.9%May 11
SIONSell

Peter A. Thompson · Director

$2.5M−2.0%Apr 21
SIONSell

Orbimed Advisors LLC · Director

$2.5M−2.0%Apr 21
SIONSell

Peter A. Thompson · Director

$22.9M−14.0%Apr 16
SIONSell

Orbimed Advisors LLC · Director

$22.9M−14.0%Apr 16
SIONSell

Jennifer Fitzpatrick · General Counsel

$347K−100.0%Mar 6
SIONSell

Tpg Gp A, LLC · 10% owner

$10.0M−4.0%Jan 26
SIONSell

Orbimed Advisors LLC · Director

$1.5M−1.0%Dec 29
SIONSell

Peter A. Thompson · Director

$1.5M−1.0%Dec 29
SIONSell

Orbimed Advisors LLC · Director

$83KDec 19
SIONSell

Peter A. Thompson · Director

$83KDec 19
SIONSell

Jennifer Fitzpatrick · General Counsel

$415K−100.0%Dec 9
SIONSell

Orbimed Advisors LLC · Director

$4.8M−3.0%Nov 26
SIONSell

Peter A. Thompson · Director

$4.8M−3.0%Nov 26
SIONSell

Ra Capital Management, L.P. · Director and 10% owner

$1.2M−16.0%Nov 24
SIONBuy

Tpg Gp A, LLC · 10% owner

$950K+1.0%Jul 1
SIONBuy

Tpg Gp A, LLC · 10% owner

$20.3M+20.0%Feb 12
SIONBuy

Ra Capital Management, L.P. · Director and 10% owner

$20.3M+94.0%Feb 10
SIONBuy

Orbimed Advisors LLC · Director

$9.9M+17.0%Feb 10
SIONBuy

Peter A. Thompson · Director

$9.9M+17.0%Feb 10
SIONBuy

Bruce Booth · Director

$1.1M+2.0%Feb 10
SIONBuy

Atlas Venture Fund Xi, L.P. · 10% owner

$1.1M+2.0%Feb 10
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; 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.

Filings come from SEC EDGAR and prices from daily closes. Not investment advice.