Paydirt
Insider filing · SION

Peter A. Thompson bought $9.9M of Sionna Therapeutics (SION)

Executed Feb 10 2025, disclosed Feb 10 2025, the same day.

Value, as filed
$9.9M
550,000 sh × $18.00
Executed
Feb 10 2025
the trade date, as filed
Disclosed
Feb 10 2025
0 days after the trade
Return, 21 sessionsiFrom the disclosed entry session; derived
-31.5%
-31.5% from execution

Over the 21 trading sessions from the disclosed entry session (Feb 10 2025), the stock returned -31.5% (delay-adjusted); from the execution session (Feb 10 2025), -31.5%. Derived: entry at the session's open, exit at the close 20 sessions later.

The filer
PT Peter A. Thompson Director profile →

Peter A. Thompson (Director) filed 8 Form 4 reports in the trailing twelve months (0 purchases, 8 sales), most often in Sionna Therapeutics, Inc. (SION). The largest single filing was $22.9M of SION (510,583 sh across 3 lots, as filed), executed Apr 14.

The name
SION Sionna Therapeutics, Inc. SION · Healthcare · 44 filings in 24 months ticker →

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

More Healthcare filings→ Insider filings, newest first→ View the original filing at www.sec.gov→
Other filings by Peter A. Thompson in SION
SIONSALE Sionna Therapeutics, Inc. $3.9M
85,918 sh × $44.86
Exec Jul 7
Filed Jul 9 · 4:47 PM ET SIONSALE Sionna Therapeutics, Inc. $5.3M
115,844 sh × $45.50
Exec Jun 30
Filed Jul 2 · 4:45 PM ET SIONSALE Sionna Therapeutics, Inc. $13.4M
292,952 sh across 3 lots
Exec May 7
Filed May 11 · 5:30 PM ET SIONSALE Sionna Therapeutics, Inc. $2.5M
55,345 sh across 2 lots
Exec Apr 17
Filed Apr 21 · 5:30 PM ET SIONSALE Sionna Therapeutics, Inc. $22.9M
510,583 sh across 3 lots
Exec Apr 14
Filed Apr 16 · 5:30 PM ET SIONSALE Sionna Therapeutics, Inc. $1.3M
29,063 sh × $44.58
Exec Feb 3
Filed Feb 4 · 5:30 PM ET SIONSALE Sionna Therapeutics, Inc. $1.5M
33,356 sh × $44.55
Exec Dec 24 2025
Filed Dec 29 2025 · 5:30 PM ET SIONSALE Sionna Therapeutics, Inc. $4.7M
106,473 sh across 2 lots
Exec Nov 24 2025
Filed Nov 26 2025 · 5:30 PM ET