Michael Cloonan

SION

Michael Cloonan serves as President & CEO at Sionna Therapeutics, Inc. (SION). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

0 trades

$0.00

Total Sells

5 trades

$6.33M

Net Position

Net Seller

$6.33M

Companies Traded

SION

Active Period

Aug 2025 – Oct 2025

5 total trades

Most Recent

Sell SION

Oct 21, 2025 · $3.62M

Michael Cloonan's Insider Trading at Sionna Therapeutics, Inc. (SION)

Buys

0 · $0.00

Sells

5 · $6.33M

Total Shares Bought

Total Shares Sold

200,000

SION Price Chart

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Date	Type	Shares	Avg Price	Value
Oct 21, 2025	Sell	99,800	$36.26	$3.62M
Oct 15, 2025	Sell	25,200	$31.28	$788.2K
Sep 26, 2025	Sell	25,000	$29.11	$727.8K
Aug 26, 2025	Sell	25,000	$24.97	$624.4K
Aug 20, 2025	Sell	25,000	$22.75	$568.8K