Klein Matthew B. Insider Trading Activity

Corporate InsiderDirector · CIK 1808968

Total trades

$4.3M

Total volume

May 21, 2026

Last activity

PTC THERAPEUTICS, INC.

Klein Matthew B. has been net-selling over the last 12 months with 0 purchases and 14 sales across 2 different companies.

PTCT is the most-traded position with 13 trades. The largest single transaction was a sale of PTCT for $620K on Dec 30, 2025.

Performance Scorecard

Forward stock performance after each transaction by Klein Matthew B.. 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	—	-5.7%	50%	14
90 days	—	+0.1%	56%	9
120 days	—	-3.8%	63%	8

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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Recent Trades

DATE	TICKER	TYPE	SHARES	PRICE	VALUE	Δ OWNED	ROLE
May 21, 2026 Filed 3d late	CLPT	Sell	16,000	$11.59	$185K	−25.4%	Director
May 14, 2026	PTCT	Sell	7,221	$73.08	$528K	−1.8%	CEO
May 14, 2026	PTCT	Sell	2,100	$73.08	$153K	−0.5%	CEO
May 14, 2026	PTCT	Sell	679	$73.06	$50K	−0.2%	CEO
May 14, 2026	PTCT	Sell	2,572	$72.46	$186K	−0.6%	CEO
Apr 21, 2026	PTCT	Sell	2,850	$70.91	$202K	−0.7%	CEO
Mar 12, 2026	PTCT	Sell	2,662	$64.08	$171K	−0.7%	CEO
Feb 18, 2026	PTCT	Sell	7,371	$69.36	$511K	−1.9%	CEO
Jan 8, 2026	PTCT	Sell	2,514	$76.45	$192K	−0.6%	CEO
Jan 7, 2026	PTCT	Sell	3,016	$77.48	$234K	−0.8%	CEO
Jan 6, 2026	PTCT	Sell	5,149	$76.95	$396K	−1.3%	CEO
Dec 30, 2025 Filed 3d late	PTCT	Sell	8,089	$76.64	$620K	−2.3%	CEO
Dec 2, 2025	PTCT	Sell	3,428	$79.07	$271K	−1.0%	CEO
Aug 5, 2025	PTCT	Sell	10,739	$51.74	$556K	−3.1%	CEO