Sionna Therapeutics, Inc.

SION · Healthcare · Sionna Therapeutics, Inc., a clinical-stage biopharmaceutical company, researches and develops medicines for the treatment of cystic fibros…

Sionna Therapeutics, Inc. (SION), in the Healthcare sector, has 23 disclosed filings on Paydirt over the trailing twelve months from 7 corporate insiders: 0 purchases and 23 sales. Filers took a median of 2 days from execution to disclosure, and the most recent trade was executed Sep 17 and filed Sep 21. The most active filer was Peter A. Thompson with 8 filings. Data as of Nov 7 2026.

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Filings, ttm

0 buys · 23 sells

Traders, ttm

7 insiders

Volume, ttmiDollar value disclosed in the window

$134.4M

estimated for Congress, as filed for insiders

Median delay

execution to disclosure

Last traded

Sep 17

Filed Sep 21

ADViAverage daily dollar volume

$10.0M

market data

Share price · 12M

$5.12 (-85.7%)

Adjusted for splits and dividends.

Volume by month

Buys $63.4M Sells $194.7M

Estimated for Congress, as filed for insiders · by filing month · past 24 months

Who filed · past 24 months

Peter A. Thompson Director 9 filings · 1 buy, 8 sales BB

Bruce Booth Director 6 filings · 1 buy, 5 sales OL Orbimed Advisors Llc Director 6 filings · 0 buys, 6 sales MC

Michael Cloonan President & CEO 5 filings · 0 buys, 5 sales JF

Jennifer Fitzpatrick Chief Legal Officer 4 filings · 0 buys, 4 sales OL OrbiMed Capital GP VIII LLC Director 3 filings · 1 buy, 2 sales RP Ra Capital Management, L.P. Director 3 filings · 1 buy, 2 sales ER

Elena Ridloff Director 3 filings · 0 buys, 3 sales

All 14 filers

AP Atlas Venture Fund XI, L.P. 10% owner 1 filing · 1 buy, 0 sales JC

James G Coulter Other 1 filing · 1 buy, 0 sales PK Peter Kolchinsky Director 1 filing · 0 buys, 1 sale RP RA Capital Nexus Fund III, L.P. Director 1 filing · 0 buys, 1 sale TL Tpg Gp A, Llc Other 1 filing · 1 buy, 0 sales JW

Jon Winkelried Other 1 filing · 0 buys, 1 sale

Recent filings

Ra Capital Management, L.P.SALE Director $21.8M
3,448,811 sh across 2 lots
Exec Sep 17
Filed Sep 21 · 6:56 PM ET Peter A. ThompsonSALE Director $3.9M
85,918 sh × $44.86
Exec Jul 7
Filed Jul 9 · 4:47 PM ET Orbimed Advisors LlcSALE Director $3.9M
85,918 sh × $44.86
Exec Jul 7
Filed Jul 9 · 4:44 PM ET Jennifer FitzpatrickSALE Chief Legal Officer $447K
10,250 sh × $43.60
Exec Jul 6
Filed Jul 7 · 4:38 PM ET Peter A. ThompsonSALE Director $5.3M
115,844 sh × $45.50
Exec Jun 30
Filed Jul 2 · 4:45 PM ET Orbimed Advisors LlcSALE Director $5.3M
115,844 sh × $45.50
Exec Jun 30
Filed Jul 2 · 4:42 PM ET Orbimed Advisors LlcSALE Director $13.4M
292,952 sh across 3 lots
Exec May 7
Filed May 11 · 5:30 PM ET Peter A. ThompsonSALE Director $13.4M
292,952 sh across 3 lots
Exec May 7
Filed May 11 · 5:30 PM ET Orbimed Advisors LlcSALE Director $2.5M
55,345 sh across 2 lots
Exec Apr 17
Filed Apr 21 · 5:30 PM ET Peter A. ThompsonSALE Director $2.5M
55,345 sh across 2 lots
Exec Apr 17
Filed Apr 21 · 5:30 PM ET Orbimed Advisors LlcSALE Director $22.9M
510,583 sh across 3 lots
Exec Apr 14
Filed Apr 16 · 5:30 PM ET Peter A. ThompsonSALE Director $22.9M
510,583 sh across 3 lots
Exec Apr 14
Filed Apr 16 · 5:30 PM ET Jennifer FitzpatrickSALE Chief Legal Officer $347K
10,250 sh × $33.86
Exec Mar 5
Filed Mar 6 · 5:30 PM ET OrbiMed Capital GP VIII LLCSALE Director $1.3M
29,063 sh × $44.58
Exec Feb 3
Filed Feb 4 · 5:30 PM ET Peter A. ThompsonSALE Director $1.3M
29,063 sh × $44.58
Exec Feb 3
Filed Feb 4 · 5:30 PM ET Jon WinkelriedSALE 10% owner $10.0M
250,000 sh × $40.00
Exec Jan 22
Filed Jan 26 · 5:30 PM ET Peter A. ThompsonSALE Director $1.5M
33,356 sh × $44.55
Exec Dec 24 2025
Filed Dec 29 2025 · 5:30 PM ET OrbiMed Capital GP VIII LLCSALE Director $1.5M
33,356 sh × $44.55
Exec Dec 24 2025
Filed Dec 29 2025 · 5:30 PM ET Jennifer FitzpatrickSALE Chief Legal Officer $415K
10,250 sh × $40.52
Exec Dec 5 2025
Filed Dec 9 2025 · 5:30 PM ET Peter A. ThompsonSALE Director $4.7M
106,473 sh across 2 lots
Exec Nov 24 2025
Filed Nov 26 2025 · 5:30 PM ET Orbimed Advisors LlcSALE Director $4.7M
106,473 sh across 2 lots
Exec Nov 24 2025
Filed Nov 26 2025 · 5:30 PM ET Peter KolchinskySALE Director $947K
23,973 sh across 3 lots
Exec Nov 21 2025
Filed Nov 24 2025 · 5:30 PM ET Ra Capital Management, L.P.SALE Director $5.0M
124,870 sh across 10 lots
Exec Nov 17 2025
Filed Nov 19 2025 · 5:30 PM ET RA Capital Nexus Fund III, L.P.SALE Director $14.8M
373,610 sh across 8 lots
Exec Oct 24 2025
Filed Oct 28 2025 · 5:30 PM ET Michael CloonanSALE President & CEO $3.6M
99,800 sh across 4 lots
Exec Oct 21 2025
Filed Oct 22 2025 · 5:30 PM ET