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Thompson Peter A.'s Form 4 filing

Sionna Therapeutics, Inc. (SION) · filed May 29, 2026

Accession no.
0000947871-26-000588
Filed
May 29, 2026
Trade date
May 27, 2026
Filing delay
2 days
Rule 10b5-1 plan
Checked

This filing lists 1 non-derivative transaction. Open-market sales total $4.49K. It was filed 2 days after the trade.

Reporting owners

A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.

Reporting owners on this filing
OwnerRelationship to the company
Thompson Peter A.CIK 0001357522Director

Non-derivative securities (Table I)

Acquisitions and disposals of common stock and similar shares, one row per line on the filing.

Non-derivative transactions
Trade dateSecurityTransactionSharesPriceValueShares afterOwnershipFlags
May 27, 2026Common StockSSaleDisposed−101$44.49−$4,493.492,671,721Indirect

Footnotes and remarks

Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.

No transaction price on this filing refers to a footnote.

Read the full filing on SEC EDGAR (opens in a new tab)