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SIONSionna Therapeutics, Inc.

Elena Ridloff

CFO and CBO at Sionna Therapeutics, Inc., as of Sep 18, 2026Sold $1.3M of stock in the past 12 months: 100% under a disclosed plan.

Updated Oct 15, 2026 from SEC filings · covers Oct 16, 2025 to Oct 15, 2026
133K
shares held after the latest filing, Sionna Therapeutics, Inc.
Vested shares reported on Forms 3, 4 and 5 only. Not the insider's whole wealth.
2
companies filed for

Selling by month

Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

Disclosed planOne dollar scale for every month; the tallest bar is labeled
OctNovDecJanFebMar 2026: $632K under a disclosed plan$632KMarApr 2026: $393K under a disclosed planAprMay 2026: $261K under a disclosed planMayJunJulAugSepOct

Pattern

What the filings show, past 12 months. Nothing here rates or predicts.

Roles from filings

Every company we track where this person has filed, newest filing first.

CompanyTitleFirst filingLatest filing
Sionna Therapeutics, Inc. (SION)CFO and CBOFeb 6, 2025Sep 18, 2026
Kymera Therapeutics, Inc. (KYMR)DirectorMar 16, 2021Jun 25, 2026

Also a director at

Kymera Therapeutics, Inc. (KYMR)

Recent filings

The last 4 days with transactions, newest first, one line per trade date. Each number links to an SEC filing.

This page shows only what this person reported on SEC ownership filings. See the methodology. Spotted something wrong? Report an error.