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Sionna Therapeutics, Inc.

SION Net selling
CIK 0002036042 #3720 in the set updated 17 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

9 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
547,343
1.21%
$24.55M
0.0%
Fitzpatrick Jennifer
Chief Legal Officer
—
$1.21M (3) scheduled
−$1.21M
0
0.0000%
$0.00
—
Atlas Venture Fund XI, L.P. entity
10% owner
—
—
—
3,694,020
8.17%
$165.71M
—
Ridloff Elena
CFO
—
—
—
38,532
0.0852%
$1.73M
−68.8%

Individual transactions

12
Insider
Date
Role
Action
Shares
Price
Amount
Fitzpatrick Jennifer
6 Jul 2026
Chief Legal Officer
Sold after exercise
10,250
$43.60
$446.86K
Fitzpatrick Jennifer
5 Mar 2026
Chief Legal Officer
Sold after exercise
10,250
$33.86
$347.02K
Fitzpatrick Jennifer
5 Dec 2025
Chief Legal Officer
Sold after exercise
10,250
$40.52
$415.33K
Cloonan Michael
21 Oct 2025
President & CEO
Sold after exercise
33,532
$37.31
$1.25M
Cloonan Michael
21 Oct 2025
President & CEO
Sold after exercise
22,895
$36.60
$837.96K
Cloonan Michael
21 Oct 2025
President & CEO
Sold after exercise
30,049
$35.63
$1.07M
Cloonan Michael
21 Oct 2025
President & CEO
Sold after exercise
13,324
$34.44
$458.88K
Cloonan Michael
16 Oct 2025
President & CEO
Sold after exercise
200
$34.00
$6.80K
Cloonan Michael
16 Oct 2025
President & CEO
Sold after exercise
10,225
$31.46
$321.69K
Cloonan Michael
15 Oct 2025
President & CEO
Sold after exercise
14,775
$31.11
$459.66K
Cloonan Michael
29 Sep 2025
President & CEO
Sold after exercise
7,793
$29.70
$231.45K
Cloonan Michael
26 Sep 2025
President & CEO
Sold after exercise
17,207
$28.85
$496.35K
Show all 147 transactions →

What was left out

Form 4 filings counted 50
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 180,750
History held since 10 Feb 2025