Cloonan Michael Insider Trading Activity

Corporate InsiderCEO · CIK 1704336

Total trades

$6.3M

Total volume

Oct 21, 2025

Last activity

SION

Sionna Therapeutics, Inc.

Cloonan Michael has been net-selling over the last 12 months with 0 purchases and 12 sales across 1 company.

SION is the most-traded position with 12 trades. The largest single transaction was a sale of SION for $1.3M on Oct 21, 2025.

Performance Scorecard

Forward stock performance after each transaction by Cloonan Michael. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.

PERIOD	AVG BUY RETURN	AVG SELL AVOIDED	SUCCESS RATE	TRADES
30 days	—	-15.3%	0%	12
90 days	—	-36.5%	0%	12
120 days	—	-34.1%	0%	12

Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.

Price & Trades

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SION · Sionna Therapeutics, Inc.

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Recent Trades

DATE	TICKER	TYPE	SHARES	PRICE	VALUE	Δ OWNED	ROLE
Oct 21, 2025	SION	Sell	13,324	$34.44	$459K	−2.4%	CEO
Oct 21, 2025	SION	Sell	30,049	$35.63	$1.1M	−5.2%	CEO
Oct 21, 2025	SION	Sell	22,895	$36.60	$838K	−4.0%	CEO
Oct 21, 2025	SION	Sell	33,532	$37.31	$1.3M	−5.8%	CEO
Oct 16, 2025	SION	Sell	200	$34.00	$7K	−0.0%	CEO
Oct 16, 2025	SION	Sell	10,225	$31.46	$322K	−1.8%	CEO
Oct 15, 2025	SION	Sell	14,775	$31.11	$460K	−2.6%	CEO
Sep 29, 2025	SION	Sell	7,793	$29.70	$231K	−1.4%	CEO
Sep 26, 2025	SION	Sell	17,207	$28.85	$496K	−3.0%	CEO
Aug 27, 2025	SION	Sell	7,426	$25.01	$186K	−1.3%	CEO
Aug 26, 2025	SION	Sell	17,574	$24.96	$439K	−3.1%	CEO
Aug 20, 2025	SION	Sell	25,000	$22.75	$569K	−4.4%	CEO