Blackford Quentin S. Insider Trading Activity

Corporate InsiderCEO · CIK 1612451

Total trades

$12.6M

Total volume

Mar 2, 2026

Last activity

IRTC

iRhythm Holdings, Inc.

Blackford Quentin S. has been net-selling over the last 12 months with 0 purchases and 12 sales across 1 company.

IRTC is the most-traded position with 12 trades. The largest single transaction was a sale of IRTC for $3.5M on Feb 25, 2026.

Performance Scorecard

Forward stock performance after each transaction by Blackford Quentin S.. 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	—	-4.2%	33%	12
90 days	—	-1.1%	42%	12
120 days	—	-2.0%	42%	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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IRTC · iRhythm Holdings, Inc.

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Recent Trades

DATE	TICKER	TYPE	SHARES	PRICE	VALUE	Δ OWNED	ROLE
Mar 2, 2026	IRTC	Sell	4,347	$128.44	$558K	−2.0%	CEO
Mar 2, 2026	IRTC	Sell	4,043	$128.44	$519K	−1.9%	CEO
Mar 2, 2026	IRTC	Sell	5,423	$128.44	$697K	−2.6%	CEO
Feb 25, 2026	IRTC	Sell	25,540	$135.42	$3.5M	−12.1%	CEO
Nov 3, 2025	IRTC	Sell	14,059	$182.94	$2.6M	−7.9%	CEO
Aug 5, 2025	IRTC	Sell	8,726	$158.85	$1.4M	−4.2%	CEO
Aug 5, 2025	IRTC	Sell	9,775	$160.06	$1.6M	−4.9%	CEO
Aug 5, 2025	IRTC	Sell	4,905	$160.73	$788K	−2.6%	CEO
Aug 5, 2025	IRTC	Sell	1,600	$161.92	$259K	−0.9%	CEO
Aug 5, 2025	IRTC	Sell	1,514	$163.30	$247K	−0.8%	CEO
Aug 5, 2025	IRTC	Sell	3,174	$163.93	$520K	−1.7%	CEO
Aug 5, 2025	IRTC	Sell	306	$165.00	$50K	−0.2%	CEO