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 65 sales across 1 company.

PTCT is the most-traded position with 65 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	—	-0.6%	58%	57
90 days	—	-6.4%	39%	51
120 days	—	-6.7%	41%	49

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

Price & Trades

Pro: Trade Markers

PTCT · PTC THERAPEUTICS, INC.

🔒 Subscribe to see trade entries

Pro members see exactly when Mark Elliott Boulding bought and sold PTCT.

Upgrade to Pro

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