Mark Elliott Boulding Insider Trading Activity

Corporate InsiderVP · CIK 1578852

Total trades

$8.0M

Total volume

Jul 6, 2026

Last activity

PTCT

PTC THERAPEUTICS, INC.

Mark Elliott Boulding has been net-selling over the last 12 months with 0 purchases and 64 sales across 1 company.

PTCT is the most-traded position with 64 trades. The largest single transaction was a sale of PTCT for $1.4M on Sep 12, 2025.

Performance Scorecard

Forward stock performance after each transaction by Mark Elliott Boulding. 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	—	+1.7%	63%	65
90 days	—	-5.0%	46%	57
120 days	—	-6.5%	41%	51

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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PTCT · PTC THERAPEUTICS, INC.

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Recent Trades

Showing the 50 most recent of 65 disclosed trades.

DATE	TICKER	TYPE	SHARES	PRICE	VALUE	Δ OWNED	ROLE
Jul 6, 2026	PTCT	Sell	519	$85.84	$45K	−0.5%	VP
Jul 6, 2026	PTCT	Sell	833	$84.41	$70K	−0.8%	VP
Jul 6, 2026	PTCT	Sell	313	$83.10	$26K	−0.3%	VP
Jul 6, 2026	PTCT	Sell	745	$86.38	$64K	−0.7%	VP
Jul 6, 2026	PTCT	Sell	645	$85.84	$55K	−0.6%	VP
Jul 6, 2026	PTCT	Sell	1,036	$84.41	$87K	−1.0%	VP
Jul 6, 2026	PTCT	Sell	387	$83.10	$32K	−0.4%	VP
Jul 6, 2026	PTCT	Sell	601	$86.38	$52K	−0.6%	VP
May 15, 2026	PTCT	Sell	456	$72.67	$33K	−0.4%	VP
May 15, 2026	PTCT	Sell	2,356	$72.08	$170K	−2.2%	VP
May 8, 2026	PTCT	Sell	1,900	$79.31	$151K	−1.8%	VP
May 8, 2026	PTCT	Sell	840	$78.23	$66K	−0.8%	VP
May 8, 2026	PTCT	Sell	600	$79.28	$48K	−0.6%	VP
May 8, 2026	PTCT	Sell	200	$78.00	$16K	−0.2%	VP
Apr 6, 2026	PTCT	Sell	1,443	$69.75	$101K	−1.4%	VP
Apr 6, 2026	PTCT	Sell	822	$68.91	$57K	−0.8%	VP
Feb 19, 2026	PTCT	Sell	588	$68.54	$40K	−0.5%	VP
Feb 19, 2026	PTCT	Sell	1,629	$69.82	$114K	−1.5%	VP
Feb 19, 2026	PTCT	Sell	212	$68.54	$15K	−0.2%	VP
Feb 19, 2026	PTCT	Sell	590	$69.82	$41K	−0.6%	VP
Feb 18, 2026	PTCT	Sell	3,081	$69.36	$214K	−2.8%	VP
Feb 17, 2026	PTCT	Sell	2,811	$69.29	$195K	−2.5%	VP
Feb 17, 2026	PTCT	Sell	2	$70.13	$140.26	−0.0%	VP
Jan 9, 2026	PTCT	Sell	107	$79.52	$9K	−0.1%	VP
Jan 9, 2026	PTCT	Sell	686	$78.71	$54K	−0.6%	VP
Jan 9, 2026	PTCT	Sell	1,521	$77.46	$118K	−1.3%	VP
Jan 8, 2026	PTCT	Sell	265	$77.07	$20K	−0.2%	VP
Jan 8, 2026	PTCT	Sell	1,286	$76.45	$98K	−1.1%	VP
Jan 8, 2026	PTCT	Sell	2,482	$76.56	$190K	−2.1%	VP
Jan 7, 2026	PTCT	Sell	1,503	$77.48	$116K	−1.3%	VP
Jan 7, 2026	PTCT	Sell	471	$77.10	$36K	−0.4%	VP
Jan 7, 2026	PTCT	Sell	269	$77.92	$21K	−0.2%	VP
Jan 7, 2026	PTCT	Sell	11	$78.98	$868.78	−0.0%	VP
Jan 7, 2026	PTCT	Sell	1,638	$77.11	$126K	−1.4%	VP
Jan 7, 2026	PTCT	Sell	949	$77.91	$74K	−0.8%	VP
Jan 7, 2026	PTCT	Sell	38	$78.60	$3K	−0.0%	VP
Jan 6, 2026	PTCT	Sell	1,739	$76.95	$134K	−1.4%	VP
Jan 5, 2026	PTCT	Sell	1,123	$74.92	$84K	−0.9%	VP
Jan 5, 2026	PTCT	Sell	108	$76.79	$8K	−0.1%	VP
Jan 5, 2026	PTCT	Sell	1,035	$76.10	$79K	−0.8%	VP
Nov 17, 2025	PTCT	Sell	1,843	$75.64	$139K	−1.7%	VP
Nov 17, 2025	PTCT	Sell	777	$76.53	$59K	−0.7%	VP
Nov 17, 2025	PTCT	Sell	192	$77.18	$15K	−0.2%	VP
Oct 7, 2025	PTCT	Sell	1,757	$62.89	$110K	−1.6%	VP
Oct 7, 2025	PTCT	Sell	1,306	$63.80	$83K	−1.2%	VP
Oct 7, 2025	PTCT	Sell	312	$64.97	$20K	−0.3%	VP
Oct 6, 2025	PTCT	Sell	2,266	$65.07	$147K	−2.1%	VP
Oct 3, 2025	PTCT	Sell	877	$66.67	$58K	−0.8%	VP
Oct 3, 2025	PTCT	Sell	824	$65.73	$54K	−0.8%	VP
Oct 3, 2025	PTCT	Sell	906	$66.63	$60K	−0.9%	VP