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Sionna Therapeutics, Inc.

SION Net buying

CIK 0002036042 #3720 in the set updated 22 Sep 2026

Bought (120 mo)

$63.41M

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

Sold (120 mo)

$196.47M

$135.40M on a plan · $7.77M straight out of an exercise

Sold at will

$53.30M

47 of 160 sales

Net

−$133.06M

+$10.11M against sales at will

By person

10 insiders · 168 transactions

Insider

Role

Bought

Sold

Net

Holding

Of company

Worth

Change

ORBIMED ADVISORS LLC entity

Director

$9.90M (1)

$55.67M (20) scheduled

−$45.77M

2,469,959

5.46%

$18.43M

—

Thompson Peter A.

Director

$9.90M (1)

$55.67M (20) scheduled

−$45.77M

2,469,959

5.46%

$18.43M

—

RA CAPITAL MANAGEMENT, L.P. entity

Director

$20.25M (2)

$43.30M (46)

−$23.05M

318,066

0.7035%

$2.37M

—

Booth Bruce

Director

$1.08M (1)

$22.09M (50) scheduled

−$21.01M

686,567

1.52%

$5.12M

—

TPG GP A, LLC entity

10% owner

$21.20M (2)

$10.00M (1)

+$11.20M

6,494,962

14.37%

$48.45M

+849.0%

Cloonan Michael

President & CEO

—

$6.33M (12) scheduled

−$6.33M

765,393

1.69%

$5.71M

+39.8%

Ridloff Elena

CFO and CBO

—

$1.97M (7) scheduled

−$1.97M

133,069

0.2943%

$992.69K

+7.7%

Fitzpatrick Jennifer

CLO and Head of Program Mgmt.

—

$1.45M (4) scheduled

−$1.45M

56,265

0.1244%

$419.74K

—

Atlas Venture Fund XI, L.P. entity

10% owner

$1.08M (1)

—

+$1.08M

3,694,020

8.17%

$27.56M

—

McKee Charlotte

CMO and Head of R&D

—

128,415

0.2840%

$957.98K

+351.9%

Individual transactions

Nothing of that kind in this period.

What was left out

Form 4 filings counted 82

Amendments (4/A) skipped 0

Filings about a different issuer 0

Unreadable filings 0

Joint filings 22

Sales on a Rule 10b5-1 plan 97

Sales straight out of an exercise 16

Sales at will 47

Transactions with no price 0

Shares from compensation/vesting 27,114,850

History held since 10 Feb 2025