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Sionna Therapeutics, Inc.

SION Net selling

CIK 0002036042 #3720 in the set updated 21 Sep 2026

Bought (12 mo)

$0.00

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

Sold (12 mo)

$171.24M

$133.44M on a plan · $6.34M straight out of an exercise

Sold at will

$31.46M

45 of 147 sales

Net

−$171.24M

−$31.46M against sales at will

By person

10 insiders · 147 transactions

Insider

Role

Bought

Sold

Net

Holding

Of company

Worth

Change

ORBIMED ADVISORS LLC entity

Director

—

$55.67M (20) scheduled

−$55.67M

2,469,959

5.46%

$110.80M

—

Thompson Peter A.

Director

—

$55.67M (20) scheduled

−$55.67M

2,469,959

5.46%

$110.80M

—

Booth Bruce

Director

—

$22.09M (50) scheduled

−$22.09M

686,567

1.52%

$30.80M

—

RA CAPITAL MANAGEMENT, L.P. entity

Director

—

$21.46M (44)

−$21.46M

159,033

0.3517%

$7.13M

—

TPG GP A, LLC entity

10% owner

—

$10.00M (1)

−$10.00M

6,494,962

14.37%

$291.36M

+849.0%

Cloonan Michael

President & CEO

—

$5.13M (9) scheduled

−$5.13M

765,393

1.69%

$34.34M

+39.8%

Fitzpatrick Jennifer

CLO and Head of Program Mgmt.

—

$1.21M (3) scheduled

−$1.21M

56,265

0.1244%

$2.52M

—

Atlas Venture Fund XI, L.P. entity

10% owner

—

3,694,020

8.17%

$165.71M

—

Ridloff Elena

CFO and CBO

—

133,069

0.2943%

$5.97M

+7.7%

McKee Charlotte

CMO and Head of R&D

—

128,415

0.2840%

$5.76M

+351.9%

Individual transactions

Nothing of that kind in this period.

What was left out

Form 4 filings counted 54

Amendments (4/A) skipped 0

Filings about a different issuer 0

Unreadable filings 0

Joint filings 15

Sales on a Rule 10b5-1 plan 90

Sales straight out of an exercise 12

Sales at will 45

Transactions with no price 0

Shares from compensation/vesting 649,602

History held since 10 Feb 2025