William D Young

Insider

First SEC filing: March 18, 2026 · Latest: June 12, 2026

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 69 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

69 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 29, 2026	AUTL	A	47,500	—	—	47,500 Direct	—	Acquired	(price as of 2026-08-20)
June 29, 2026	AUTL	A	31,667	—	—	31,667 Direct	—	Acquired	(price as of 2026-08-20)
June 10, 2026	PRAX	A	648	—	—	648 Direct	—	Acquired	(price as of 2026-08-20)
June 10, 2026	PRAX	A	1,371	—	—	3,269 Direct	+72.23%	Acquired	(price as of 2026-08-20)
April 26, 2022	TBPH	A	9,852	—	—	78,010 Direct	+14.45%	Acquired	(price as of 2026-08-20)
April 26, 2022	TBPH	A	28,000	—	—	28,000 Direct	—	Acquired	(price as of 2026-08-20)
April 27, 2021	TBPH	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
April 27, 2021	TBPH	A	9,828	—	—	68,158 Direct	+16.85%	Acquired	(price as of 2026-08-20)
June 1, 2020	VRTX	A	4,527	—	—	4,527 Direct	—	Acquired	(price as of 2026-08-20)
April 28, 2020	TBPH	A	6,635	—	—	58,330 Direct	+12.83%	Acquired	(price as of 2026-08-20)
April 28, 2020	TBPH	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 2, 2020	VRTX	M	20,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 2, 2020	VRTX	S 10b5-1	100	$220.08	$22,008	9,311 Direct	-1.06%	Disposed	147.2% (price as of 2026-08-20)
Jan. 2, 2020	VRTX	S 10b5-1	10,134	$219.37	$2,223,096	9,411 Direct	-51.85%	Disposed	148.0% (price as of 2026-08-20)
Jan. 2, 2020	VRTX	S 10b5-1	7,266	$218.73	$1,589,292	19,545 Direct	-27.10%	Disposed	148.8% (price as of 2026-08-20)
Jan. 2, 2020	VRTX	S 10b5-1	2,500	$217.72	$544,300	26,811 Direct	-8.53%	Disposed	149.9% (price as of 2026-08-20)
Jan. 2, 2020	VRTX	M	20,000	$72.14	$1,442,800	29,311 Direct	+214.80%	Acquired	654.3% (price as of 2026-08-20)
Dec. 30, 2019	VRTX	M	30,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 30, 2019	VRTX	S 10b5-1	300	$221.16	$66,348	9,311 Direct	-3.12%	Disposed	146.0% (price as of 2026-08-20)
Dec. 30, 2019	VRTX	S 10b5-1	500	$220.25	$110,125	9,611 Direct	-4.95%	Disposed	147.1% (price as of 2026-08-20)
Dec. 30, 2019	VRTX	S 10b5-1	21,798	$218.93	$4,772,236	10,111 Direct	-68.31%	Disposed	148.5% (price as of 2026-08-20)
Dec. 30, 2019	VRTX	S 10b5-1	7,402	$218.05	$1,614,006	31,909 Direct	-18.83%	Disposed	149.5% (price as of 2026-08-20)
Dec. 30, 2019	VRTX	M	30,000	$65.65	$1,969,500	39,311 Direct	+322.20%	Acquired	728.8% (price as of 2026-08-20)
June 1, 2019	VRTX	A	2,381	—	—	9,311 Direct	+34.36%	Acquired	(price as of 2026-08-20)
April 30, 2019	TBPH	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
April 30, 2019	TBPH	A	8,385	—	—	51,695 Direct	+19.36%	Acquired	(price as of 2026-08-20)
June 1, 2018	VRTX	A	3,229	—	—	3,229 Direct	—	Acquired	(price as of 2026-08-20)
June 1, 2018	VRTX	A	1,801	—	—	6,930 Direct	+35.11%	Acquired	(price as of 2026-08-20)
May 1, 2018	TBPH	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
May 1, 2018	TBPH	A	8,186	—	—	43,310 Direct	+23.31%	Acquired	(price as of 2026-08-20)
June 1, 2017	VRTX	M	5,295	—	—	5,295 Direct	—	Acquired	(price as of 2026-08-20)
June 1, 2017	VRTX	A	2,188	—	—	5,129 Direct	+74.40%	Acquired	(price as of 2026-08-20)
May 17, 2017	TBPH	A	6,000	—	—	35,124 Direct	+20.60%	Acquired	(price as of 2026-08-20)
June 1, 2016	VRTX	A	7,073	—	—	7,073 Direct	—	Acquired	(price as of 2026-08-20)
June 1, 2016	VRTX	A	2,941	$0.01	$29	2,941 Direct	—	Acquired	5441200.0% (price as of 2026-08-20)
May 3, 2016	TBPH	A	6,000	—	—	29,124 Direct	+25.95%	Acquired	(price as of 2026-08-20)
June 10, 2015	BMRN	A	3,300	—	—	3,300 Direct	—	Acquired	(price as of 2026-08-20)
June 10, 2015	BMRN	A	1,100	—	—	11,875 Direct	+10.21%	Acquired	(price as of 2026-08-20)
June 1, 2015	VRTX	A	20,000	—	—	20,000 Direct	—	Acquired	(price as of 2026-08-20)
April 22, 2015	TBPH	A	6,000	—	—	23,124 Direct	+35.04%	Acquired	(price as of 2026-08-20)
June 4, 2014	BMRN	A	6,600	—	—	6,600 Direct	—	Acquired	(price as of 2026-08-20)
June 4, 2014	BMRN	A	2,100	—	—	10,775 Direct	+24.21%	Acquired	(price as of 2026-08-20)
June 3, 2014	TBPH	A	12,000	—	—	12,000 Direct	—	Acquired	(price as of 2026-08-20)
June 3, 2014	TBPH	A	12,000	—	—	12,000 Direct	—	Acquired	(price as of 2026-08-20)
June 1, 2014	VRTX	A	20,000	—	—	20,000 Direct	—	Acquired	(price as of 2026-08-20)
May 22, 2014	INVA	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
May 22, 2014	INVA	A	6,000	—	—	83,935 Direct	+7.70%	Acquired	(price as of 2026-08-20)
May 7, 2014	VRTX	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-20)
April 7, 2014	INVA	M	25,806	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
April 7, 2014	INVA	M	25,806	$9.69	$250,060	77,935 Direct	+49.50%	Acquired	173.3% (price as of 2026-08-20)
May 15, 2013	BMRN	A	8,500	—	—	8,500 Direct	—	Acquired	(price as of 2026-08-20)
May 15, 2013	BMRN	A	3,400	—	—	8,675 Direct	+64.45%	Acquired	(price as of 2026-08-20)
April 24, 2013	INVA	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
April 24, 2013	INVA	A	6,000	—	—	52,129 Direct	+13.01%	Acquired	(price as of 2026-08-20)
May 15, 2012	INVA	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
May 15, 2012	INVA	A	6,000	—	—	46,129 Direct	+14.95%	Acquired	(price as of 2026-08-20)
May 8, 2012	BMRN	A	3,400	—	—	5,275 Direct	+181.33%	Acquired	(price as of 2026-08-20)
May 8, 2012	BMRN	A	8,500	—	—	49,750 Direct	+20.61%	Acquired	(price as of 2026-08-20)
May 12, 2011	BMRN	A	11,250	—	—	41,250 Direct	+37.50%	Acquired	(price as of 2026-08-20)
May 12, 2011	BMRN	A	1,875	—	—	1,875 Direct	—	Acquired	(price as of 2026-08-20)
April 27, 2011	INVA	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
April 27, 2011	INVA	A	6,000	—	—	40,129 Direct	+17.58%	Acquired	(price as of 2026-08-20)
March 7, 2011	INVA	M	10,752	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 7, 2011	INVA	S	5,376	$22.31	$119,939	34,129 Direct	-13.61%	Disposed	18.7% (price as of 2026-08-20)
March 7, 2011	INVA	M	10,752	$8.52	$91,607	39,505 Direct	+37.39%	Acquired	210.8% (price as of 2026-08-20)
Feb. 18, 2011	INVA	M	10,752	—	—	10,752 Direct	-50.00%	Disposed	(price as of 2026-08-20)
Feb. 18, 2011	INVA	S	5,376	$23.22	$124,831	28,753 Direct	-15.75%	Disposed	14.1% (price as of 2026-08-20)
Feb. 18, 2011	INVA	M	10,752	$8.52	$91,607	34,129 Direct	+45.99%	Acquired	210.8% (price as of 2026-08-20)
Dec. 10, 2010	INVA	M	10,754	—	—	21,504 Direct	-33.34%	Disposed	(price as of 2026-08-20)
Dec. 10, 2010	INVA	S	5,377	$26.64	$143,243	23,377 Direct	-18.70%	Disposed	-0.6% (price as of 2026-08-20)
Dec. 10, 2010	INVA	M	10,754	$8.52	$91,624	28,754 Direct	+59.74%	Acquired	210.8% (price as of 2026-08-20)
Sept. 22, 2010	BMRN	A	30,000	$22.70	$681,000	30,000 Direct	—	Acquired	200.3% (price as of 2026-08-20)
April 27, 2010	INVA	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
April 27, 2010	INVA	A	6,000	—	—	18,000 Direct	+50.00%	Acquired	(price as of 2026-08-20)
April 24, 2009	INVA	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
April 24, 2009	INVA	A	6,000	—	—	12,000 Direct	+100.00%	Acquired	(price as of 2026-08-20)
April 22, 2008	INVA	A	6,000	—	—	6,000 Direct	—	Acquired	(price as of 2026-08-20)
April 25, 2007	INVA	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-20)
April 26, 2006	INVA	A	12,903	—	—	12,903 Direct	—	Acquired	(price as of 2026-08-20)
June 30, 2005	INVA	A	12,903	—	—	12,903 Direct	—	Acquired	(price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
June 29, 2026	AUTL	Share Option (Right to Buy)	American Depositary Shares (47,500)	$1.61	June 29, 2036	47,500	Acquired
June 29, 2026	AUTL	Restricted Share Units	American Depositary Shares (31,667)	—	—	31,667	Acquired
June 10, 2026	PRAX	Stock Option (Right to Buy)	Common Stock (648)	$240.66	June 10, 2036	648	Acquired
April 26, 2022	TBPH	Share Option (Right to Buy)	Ordinary Shares (28,000)	$10.15	April 25, 2032	28,000	Acquired
April 27, 2021	TBPH	Share Option (Right to Buy)	Ordinary Shares (6,000)	$20.35	April 26, 2031	6,000	Acquired
June 1, 2020	VRTX	Stock Option (Right to Buy)	Common Stock (4,527)	$286.27	May 31, 2030	4,527	Acquired
April 28, 2020	TBPH	Share Option (Right to Buy)	Ordinary Shares (6,000)	$30.14	April 27, 2030	6,000	Acquired
Jan. 2, 2020	VRTX	Stock Option (Right to Buy)	Common Stock (20,000)	$72.14	May 31, 2024	20,000	Disposed
Dec. 30, 2019	VRTX	Stock Option (Right to Buy)	Common Stock (30,000)	$65.65	May 6, 2024	30,000	Disposed
April 30, 2019	TBPH	Share Option (Right to Buy)	Ordinary Shares (6,000)	$23.85	April 29, 2029	6,000	Acquired
June 1, 2018	VRTX	Stock Option (Right to Buy)	Common Stock (3,229)	$152.74	May 31, 2028	3,229	Acquired
May 1, 2018	TBPH	Share Option (Right to Buy)	Ordinary Shares (6,000)	$24.43	April 30, 2028	6,000	Acquired
June 1, 2017	VRTX	Stock Option (Right to Buy)	Common Stock (5,295)	$125.71	May 31, 2027	5,295	Acquired
June 1, 2016	VRTX	Stock Option (Right to Buy)	Common Stock (7,073)	$93.51	May 31, 2026	7,073	Acquired
June 10, 2015	BMRN	Stock Option (right to buy)	Common Stock (3,300)	$122.27	June 9, 2025	3,300	Acquired
June 1, 2015	VRTX	Stock Option	Common Stock (20,000)	$127.54	May 31, 2025	20,000	Acquired
June 4, 2014	BMRN	Stock Option (right to buy)	Common Stock (6,600)	$63.10	June 3, 2024	6,600	Acquired
June 3, 2014	TBPH	Stock Option (Right to Buy)	Common Stock (12,000)	$23.51	June 2, 2024	12,000	Acquired
June 3, 2014	TBPH	Stock Option (Right to Buy)	Common Stock (12,000)	$23.51	June 2, 2024	12,000	Acquired
June 1, 2014	VRTX	Stock Option	Common Stock (20,000)	$72.14	May 31, 2024	20,000	Acquired
May 22, 2014	INVA	Stock Option (Right to Buy)	Common Stock (6,000)	$28.54	May 21, 2024	6,000	Acquired
May 7, 2014	VRTX	Stock Option (right to buy)	Common Stock (30,000)	$65.65	May 6, 2024	30,000	Acquired
April 7, 2014	INVA	Stock Option (Right to Buy)	Common Stock (25,806)	$9.69	April 27, 2014	25,806	Disposed
May 15, 2013	BMRN	Stock Option (right to buy)	Common Stock (8,500)	$67.81	May 14, 2023	8,500	Acquired
April 24, 2013	INVA	Stock Option (Right to Buy)	Common Stock (6,000)	$30.54	April 23, 2023	6,000	Acquired
May 15, 2012	INVA	Stock Option (Right to Buy)	Common Stock (6,000)	$21.62	May 14, 2022	6,000	Acquired
May 8, 2012	BMRN	Stock Option (right to buy)	Common Stock (8,500)	$37.46	May 7, 2022	8,500	Acquired
May 12, 2011	BMRN	Stock Option (right to buy)	Common Stock (11,250)	$26.49	May 11, 2021	11,250	Acquired
April 27, 2011	INVA	Stock Option (Right to Buy)	Common Stock (6,000)	$28.50	April 26, 2021	6,000	Acquired
March 7, 2011	INVA	Stock Option (Right to Buy)	Common Stock (10,752)	$8.52	April 7, 2011	10,752	Disposed
Feb. 18, 2011	INVA	Stock Option (Right to Buy)	Common Stock (10,752)	$8.52	April 7, 2011	10,752	Disposed
Dec. 10, 2010	INVA	Stock Option (Right to Buy)	Common Stock (10,754)	$8.52	April 7, 2011	10,754	Disposed
Sept. 22, 2010	BMRN	Stock Option (right to buy)	Common Stock (30,000)	$22.70	Sept. 21, 2020	30,000	Acquired
April 27, 2010	INVA	Stock Option (Right to Buy)	Common Stock (6,000)	$14.89	April 26, 2020	6,000	Acquired
April 24, 2009	INVA	Stock Option (Right to Buy)	Common Stock (6,000)	$14.98	April 23, 2019	6,000	Acquired
April 25, 2007	INVA	Stock Option (Right to Buy)	Common Stock (15,000)	$33.25	April 24, 2017	15,000	Acquired
April 26, 2006	INVA	Stock Option (Right to Buy)	Common Stock (12,903)	$27.56	April 25, 2016	12,903	Acquired
June 30, 2005	INVA	Stock Option (Right to Buy)	Common Stock (12,903)	$17.00	June 29, 2015	12,903	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 11 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
March 18, 2026	AUTL	Share Option (right to buy)→ American Depositary Shares (25,000)	25,000	Direct
March 18, 2026	AUTL	Share Option (right to buy)→ American Depositary Shares (20,000)	20,000	Direct
March 18, 2026	AUTL	Share Option (right to buy)→ American Depositary Shares (105,000)	105,000	Direct
March 18, 2026	AUTL	Share Option (right to buy)→ American Depositary Shares (80,000)	80,000	Direct
March 18, 2026	AUTL	Share Option (right to buy)→ American Depositary Shares (80,000)	80,000	Direct
Oct. 15, 2020	PRAX	Stock Options (Right to Buy)→ Common Stock (27,980)	27,980	Direct
Oct. 15, 2020	PRAX	Stock Options (Right to Buy)→ Common Stock (8,754)	8,754	Direct
Oct. 15, 2020	PRAX	Stock Options (Right to Buy)→ Common Stock (65,420)	65,420	Direct
Sept. 24, 2010	BMRN	No securities owned	0	Direct
Oct. 4, 2004	INVA	Stock Option (right to buy)→ Common Stock (32,258)	32,258	Direct
Oct. 4, 2004	INVA	Stock Option (right to buy)→ Common Stock (25,806)	25,806	Direct