← All stocks

Sionna Therapeutics, Inc.

SION No buying or selling

CIK 0002036042 #3720 in the set updated 17 Sep 2026

Bought (1 mo)

$0.00

out of their own pocket, the only kind of buying there is

Sold (1 mo)

$0.00

$0.00 on a plan · $0.00 straight out of an exercise

Sold at will

$0.00

0 of 0 sales

Net

$0.00

$0.00 against sales at will

By person

9 insiders · 0 transactions

Insider

Role

Bought

Sold

Net

Holding

Worth

Change

TPG GP A, LLC entity

10% owner

—

6,494,962

$291.36M

+849.0%

Atlas Venture Fund XI, L.P. entity

10% owner

—

3,694,020

$165.71M

—

Thompson Peter A.

Director

—

2,469,959

$110.80M

—

ORBIMED ADVISORS LLC entity

Director

—

2,469,959

$110.80M

—

Booth Bruce

Director

—

686,567

$30.80M

—

Cloonan Michael

President & CEO

—

547,343

$24.55M

0.0%

RA CAPITAL MANAGEMENT, L.P. entity

Director

—

159,033

$7.13M

—

Ridloff Elena

CFO

—

38,532

$1.73M

−68.8%

Fitzpatrick Jennifer

Chief Legal Officer

—

$0.00

—

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.

Individual transactions

Nothing of that kind in this period.

What was left out

Form 4 filings counted 0

Amendments (4/A) skipped 0

Filings about a different issuer 0

Unreadable filings 0

Joint filings 0

Sales on a Rule 10b5-1 plan 0

Sales straight out of an exercise 0

Sales at will 0

Transactions with no price 0

Shares from compensation/vesting 0

History held since 10 Feb 2025