Sionna Therapeutics ($SION) Insider Trading & Smart Money Activity

Sionna Therapeutics, Inc. · Latest filing Sep 17, 2026

Sionna Therapeutics, Inc. ($SION) has 1 insider trade on file. In the last 12 months on the open market, no insider bought and 1 insider sold ($21.84M), net -$21.84M.

Insider buyers (12 mo)

0

Insider sellers (12 mo)

1

Net insider $ (12 mo)

-$21.84M

Congress trades (12 mo)

0

13F moves on file

0

Analyst ratings on file

0

SION insider buying and selling by quarter

Quarter	Insider buys	Insider sales	Congress buys / sales	13F added / cut
Q1 2026	0	0	0 / 0	0 / 0
Q2 2026	0	0	0 / 0	0 / 0
Q3 2026	0	1 · $21.84M	0 / 0	0 / 0
Q4 2026	0	0	0 / 0	0 / 0

Insider buys and sales count open-market trades only (Form 4 codes P and S). Grants, option exercises and tax withholding are left out.

All SION insider, congress, 13F and analyst activity

All Insiders

Date	Source	Who	Action	Shares	Value / amount	ΔOwn	1W	1M	6M	Filing	Story
Sep 17, 2026	Insider	L.P. Ra Capital ManagementDirector	Sell (Open-market sale)	3.45M sh	$21.84M						—

1W / 1M / 6M = how SION moved from the trade or filing date.

Insider trading in SION: who is buying and selling

Insider	Role	Trades	Open-market net	Shares held	Last trade
L.P. Ra Capital Management	Director	1	-$21.84M		Sep 17, 2026

Frequently asked questions

Are SION insiders buying or selling?

Over the last 12 months 0 insiders made 0 open-market purchases worth $0 and 1 insider made 1 open-market sale worth $21.84M, a net -$21.84M.

What is the latest insider trade in SION?

L.P. Ra Capital Management, Director filed a sell (open-market sale) of 3.45M sh worth $21.84M on Sep 17, 2026.

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.