Elena Ridloff sold $418K of Sionna Therapeutics (SION)

Executed Aug 28 2025, disclosed Aug 28 2025, the same day.

Value, as filed

$418K

16,098 sh × $25.97

Executed

Aug 28 2025

the trade date, as filed

Disclosed

Aug 28 2025

0 days after the trade

Return, 21 sessionsiFrom the disclosed entry session; derived

–

purchases only

Returns are measured on stock purchases only.

The filer

Elena Ridloff Director profile →

Elena Ridloff (Director) filed 2 Form 4 reports in the trailing twelve months (0 purchases, 2 sales), most often in Kymera Therapeutics, Inc. (KYMR). The largest single filing was $1.0M of KYMR (12,000 sh across 3 lots, as filed), executed Mar 31.

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 Elena Ridloff in SION

SIONSALE Sionna Therapeutics, Inc. $222K
8,836 sh × $25.08
Exec Sep 2 2025
Filed Sep 3 2025 · 5:30 PM ET SIONSALE Sionna Therapeutics, Inc. $1.1M
52,000 sh across 2 lots
Exec Aug 19 2025
Filed Aug 21 2025 · 5:30 PM ET