CLOONAN MICHAEL

PrivateCIK: 1704336
Location

CAMBRIDGE, MA

CLOONAN MICHAEL (President & CEO) sold 4.4% of their position (25.20K shares) of SIONNA THERAPEUTICS, INC. on the open market

Open‑market sale worth $788.2K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 3 sales
InsiderCLOONAN MICHAELCIK 1704336
IssuerSIONNA THERAPEUTICS, INC.CIK 2036042
DirectorOfficer· President & CEO
Since Feb 2025
-25.20K
Net shares
Net seller
$788.2K
Total sold
3
Open market trades
0B · 3S
9
Total transactions
25.20K acquired · 50.40K disposed
Non-Derivative Transactions6

Common Stock

Direct
M · Option Exercise

Shares

+14.78K

Price / share

$6.11

Trade value

$90.28K

% of position

2.7%
10/15/2025
547.34K562.12K

Common Stock

Direct
S · Sale

Shares

14.78K

Price / share

$31.11

Trade value

$459.66K

% of position

2.6%
10/15/2025
562.12K547.34K

Common Stock

Direct
M · Option Exercise

Shares

+10.22K

Price / share

$6.11

Trade value

$62.47K

% of position

1.9%
10/16/2025
547.34K557.57K

Common Stock

Direct
S · Sale

Shares

10.22K

Price / share

$31.46

Trade value

$321.69K

% of position

1.8%
10/16/2025
557.57K547.34K

Common Stock

Direct
M · Option Exercise

Shares

+200.00

Price / share

$6.11

Trade value

$1.22K

% of position

0.0%
10/16/2025
547.34K547.54K

Common Stock

Direct
S · Sale

Shares

200.00

Price / share

$34.00

Trade value

$6.80K

% of position

0.0%
10/16/2025
547.54K547.34K
Total

Net shares

+0.00

Net value

-$634.18K

Derivative Transactions3

Non-Qualified Stock Option (right to buy)

Direct
M · Option Exercise
Converts to

Common Stock

14.78K shares

Shares

14.78K

Strike price

6.11

Held after

163.37K

Exercisable

10/15/2025

Non-Qualified Stock Option (right to buy)

Direct
M · Option Exercise
Converts to

Common Stock

10.22K shares

Shares

10.22K

Strike price

6.11

Held after

153.14K

Exercisable

10/16/2025

Non-Qualified Stock Option (right to buy)

Direct
M · Option Exercise
Converts to

Common Stock

200.00 shares

Shares

200.00

Strike price

6.11

Held after

152.94K

Exercisable

10/16/2025
CLOONAN MICHAEL — Insider Transaction (Form 4) Filed Oct 17, 2025 | Finecho