CLOONAN MICHAEL

PrivateCIK: 1704336
Location

CAMBRIDGE, MA

CLOONAN MICHAEL (President & CEO) sold 4.4% of their position (25K shares) of SIONNA THERAPEUTICS, INC. on the open market

Open‑market sale worth $727.8K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 2 sales
InsiderCLOONAN MICHAELCIK 1704336
IssuerSIONNA THERAPEUTICS, INC.CIK 2036042
DirectorOfficer· President & CEO
Since Feb 2025
-25K
Net shares
Net seller
$727.8K
Total sold
2
Open market trades
0B · 2S
6
Total transactions
25K acquired · 50K disposed
Non-Derivative Transactions4

Common Stock

Direct
M · Option Exercise

Shares

+17.21K

Price / share

$6.11

Trade value

$105.13K

% of position

3.1%
9/26/2025
547.34K564.55K

Common Stock

Direct
S · Sale

Shares

17.21K

Price / share

$28.85

Trade value

$496.35K

% of position

3.0%
9/26/2025
564.55K547.34K

Common Stock

Direct
M · Option Exercise

Shares

+7.79K

Price / share

$6.11

Trade value

$47.62K

% of position

1.4%
9/29/2025
547.34K555.14K

Common Stock

Direct
S · Sale

Shares

7.79K

Price / share

$29.70

Trade value

$231.45K

% of position

1.4%
9/29/2025
555.14K547.34K
Total

Net shares

+0.00

Net value

-$575.05K

Derivative Transactions2

Non-Qualified Stock Option (right to buy)

Direct
M · Option Exercise
Converts to

Common Stock

17.21K shares

Shares

17.21K

Strike price

6.11

Held after

185.94K

Exercisable

9/26/2025

Non-Qualified Stock Option (right to buy)

Direct
M · Option Exercise
Converts to

Common Stock

7.79K shares

Shares

7.79K

Strike price

6.11

Held after

178.14K

Exercisable

9/29/2025
CLOONAN MICHAEL — Insider Transaction (Form 4) Filed Sep 30, 2025 | Finecho