Douglas J Dehaan

Insider

First SEC filing: Nov. 6, 2012 · Latest: Nov. 6, 2012

On this page

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

STX selling April 27, 2015

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 56 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

56 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Sept. 23, 2015	STX	F	6,594	$46.20	$304,643	32,517 Direct	-16.86%	Disposed	1759.2% (price as of 2026-08-21)
Sept. 21, 2015	STX	A	15,842	—	—	39,111 Direct	+68.08%	Acquired	(price as of 2026-08-21)
Sept. 14, 2015	STX	F	1,040	$48.94	$50,898	23,269 Direct	-4.28%	Disposed	1655.1% (price as of 2026-08-21)
Sept. 11, 2015	STX	F	789	$49.22	$38,835	24,309 Direct	-3.14%	Disposed	1645.1% (price as of 2026-08-21)
April 27, 2015	STX	M	2,254	—	—	6,386 Direct	-26.09%	Disposed	(price as of 2026-08-21)
April 27, 2015	STX	M	7,925	—	—	6,605 Direct	-54.54%	Disposed	(price as of 2026-08-21)
April 27, 2015	STX	S	10,179	$58.37	$594,148	25,098 Direct	-28.85%	Disposed	1371.5% (price as of 2026-08-21)
April 27, 2015	STX	M	2,254	$29.87	$67,327	35,277 Direct	+6.83%	Acquired	2775.6% (price as of 2026-08-21)
April 27, 2015	STX	M	7,925	$11.16	$88,443	33,023 Direct	+31.58%	Acquired	7596.5% (price as of 2026-08-21)
Oct. 31, 2014	STX	M	2,254	—	—	8,640 Direct	-20.69%	Disposed	(price as of 2026-08-21)
Oct. 31, 2014	STX	M	7,925	—	—	14,530 Direct	-35.29%	Disposed	(price as of 2026-08-21)
Oct. 31, 2014	STX	M	4,428	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Oct. 31, 2014	STX	S	8,480	$62.14	$526,947	25,098 Direct	-25.25%	Disposed	1282.2% (price as of 2026-08-21)
Oct. 31, 2014	STX	S	14,607	$62.15	$907,825	33,578 Direct	-30.31%	Disposed	1282.0% (price as of 2026-08-21)
Oct. 31, 2014	STX	M	2,254	$29.87	$67,327	48,185 Direct	+4.91%	Acquired	2775.6% (price as of 2026-08-21)
Oct. 31, 2014	STX	M	7,925	$11.16	$88,443	45,931 Direct	+20.85%	Acquired	7596.5% (price as of 2026-08-21)
Oct. 31, 2014	STX	M	4,428	$11.06	$48,974	38,006 Direct	+13.19%	Acquired	7666.1% (price as of 2026-08-21)
Sept. 15, 2014	STX	S	3,037	$59.47	$180,610	33,578 Direct	-8.29%	Disposed	1344.3% (price as of 2026-08-21)
Sept. 11, 2014	STX	A	18,800	—	—	36,615 Direct	+105.53%	Acquired	(price as of 2026-08-21)
Sept. 11, 2014	STX	S	987	$60.35	$59,565	17,815 Direct	-5.25%	Disposed	1323.2% (price as of 2026-08-21)
May 6, 2014	STX	M	2,253	—	—	10,894 Direct	-17.14%	Disposed	(price as of 2026-08-21)
May 6, 2014	STX	M	7,925	—	—	22,455 Direct	-26.09%	Disposed	(price as of 2026-08-21)
May 6, 2014	STX	M	5,312	—	—	4,428 Direct	-54.54%	Disposed	(price as of 2026-08-21)
May 6, 2014	STX	S	15,490	$50.64	$784,414	18,802 Direct	-45.17%	Disposed	1596.1% (price as of 2026-08-21)
May 6, 2014	STX	M	2,253	$29.87	$67,297	34,292 Direct	+7.03%	Acquired	2775.6% (price as of 2026-08-21)
May 6, 2014	STX	M	7,925	$11.16	$88,443	32,039 Direct	+32.86%	Acquired	7596.5% (price as of 2026-08-21)
May 6, 2014	STX	M	5,312	$11.06	$58,751	24,114 Direct	+28.25%	Acquired	7666.1% (price as of 2026-08-21)
Nov. 7, 2013	STX	M	4,883	—	—	13,147 Direct	-27.08%	Disposed	(price as of 2026-08-21)
Nov. 7, 2013	STX	M	6,604	—	—	30,380 Direct	-17.86%	Disposed	(price as of 2026-08-21)
Nov. 7, 2013	STX	M	5,313	—	—	9,740 Direct	-35.30%	Disposed	(price as of 2026-08-21)
Nov. 7, 2013	STX	M	33,334	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Nov. 7, 2013	STX	S	1,018	$47.55	$48,406	0 Indirect	-100.00%	Disposed	1706.4% (price as of 2026-08-21)
Nov. 7, 2013	STX	S	1,018	$47.52	$48,375	0 Indirect	-100.00%	Disposed	1707.5% (price as of 2026-08-21)
Nov. 7, 2013	STX	S	61,434	$47.51	$2,918,729	18,802 Direct	-76.57%	Disposed	1707.9% (price as of 2026-08-21)
Nov. 7, 2013	STX	M	4,883	$29.87	$145,855	80,236 Direct	+6.48%	Acquired	2775.6% (price as of 2026-08-21)
Nov. 7, 2013	STX	M	6,604	$11.16	$73,701	75,353 Direct	+9.61%	Acquired	7596.5% (price as of 2026-08-21)
Nov. 7, 2013	STX	M	5,313	$11.06	$58,762	68,749 Direct	+8.38%	Acquired	7666.1% (price as of 2026-08-21)
Nov. 7, 2013	STX	M	33,334	$3.34	$111,336	63,436 Direct	+110.74%	Acquired	25616.5% (price as of 2026-08-21)
Nov. 1, 2013	STX	S 10b5-1	5,705	$48.39	$276,065	30,102 Direct	-15.93%	Disposed	1675.0% (price as of 2026-08-21)
Sept. 19, 2013	STX	A	12,128	—	—	35,807 Direct	+51.22%	Acquired	(price as of 2026-08-21)
Sept. 16, 2013	STX	S 10b5-1	1,165	$41.08	$47,858	23,679 Direct	-4.69%	Disposed	1990.9% (price as of 2026-08-21)
Sept. 13, 2013	STX	S 10b5-1	1,781	$39.94	$71,133	24,844 Direct	-6.69%	Disposed	2050.6% (price as of 2026-08-21)
Sept. 11, 2013	STX	S 10b5-1	1,411	$40.54	$57,202	26,625 Direct	-5.03%	Disposed	2018.7% (price as of 2026-08-21)
May 17, 2013	STX	M	1,321	—	—	36,984 Direct	-3.45%	Disposed	(price as of 2026-08-21)
May 17, 2013	STX	M	8,333	—	—	33,334 Direct	-20.00%	Disposed	(price as of 2026-08-21)
May 17, 2013	STX	S	9,654	$41.06	$396,393	28,036 Direct	-25.61%	Disposed	1991.9% (price as of 2026-08-21)
May 17, 2013	STX	M	1,321	$11.16	$14,742	37,690 Direct	+3.63%	Acquired	7596.5% (price as of 2026-08-21)
May 17, 2013	STX	M	8,333	$3.34	$27,832	36,369 Direct	+29.72%	Acquired	25616.5% (price as of 2026-08-21)
May 8, 2013	STX	M	2,641	—	—	38,305 Direct	-6.45%	Disposed	(price as of 2026-08-21)
May 8, 2013	STX	M	2,656	—	—	15,053 Direct	-15.00%	Disposed	(price as of 2026-08-21)
May 8, 2013	STX	M	16,667	—	—	41,667 Direct	-28.57%	Disposed	(price as of 2026-08-21)
May 8, 2013	STX	S	21,964	$41.74	$916,777	28,036 Direct	-43.93%	Disposed	1957.8% (price as of 2026-08-21)
May 8, 2013	STX	M	2,641	$11.16	$29,474	50,000 Direct	+5.58%	Acquired	7596.5% (price as of 2026-08-21)
May 8, 2013	STX	M	2,656	$11.06	$29,375	47,359 Direct	+5.94%	Acquired	7666.1% (price as of 2026-08-21)
May 8, 2013	STX	M	16,667	$3.34	$55,668	44,703 Direct	+59.45%	Acquired	25616.5% (price as of 2026-08-21)
Feb. 12, 2013	STX	S	41,273	$35.00	$1,444,555	28,036 Direct	-59.55%	Disposed	2354.1% (price as of 2026-08-21)
Feb. 12, 2013	STX	M	5,284	$11.16	$58,969	69,309 Direct	+8.25%	Acquired	7596.5% (price as of 2026-08-21)
Feb. 12, 2013	STX	M	2,656	$11.06	$29,375	64,025 Direct	+4.33%	Acquired	7666.1% (price as of 2026-08-21)
Feb. 12, 2013	STX	M	33,333	$3.34	$111,332	61,369 Direct	+118.89%	Acquired	25616.5% (price as of 2026-08-21)
Nov. 2, 2012	STX	M	17,170	—	—	46,230 Direct	-27.08%	Disposed	(price as of 2026-08-21)
Nov. 2, 2012	STX	M	1,771	—	—	20,365 Direct	-8.00%	Disposed	(price as of 2026-08-21)
Nov. 2, 2012	STX	M	16,667	—	—	91,667 Direct	-15.38%	Disposed	(price as of 2026-08-21)
Nov. 2, 2012	STX	S	91,707	$28.06	$2,573,298	0 Indirect	-100.00%	Disposed	2961.0% (price as of 2026-08-21)
Nov. 2, 2012	STX	S	43,106	$28.08	$1,210,416	28,037 Direct	-60.59%	Disposed	2958.9% (price as of 2026-08-21)
Nov. 2, 2012	STX	M	17,170	$11.16	$191,617	71,143 Direct	+31.81%	Acquired	7596.5% (price as of 2026-08-21)
Nov. 2, 2012	STX	M	16,667	$3.34	$55,668	53,973 Direct	+44.68%	Acquired	25616.5% (price as of 2026-08-21)
Nov. 2, 2012	STX	M	1,771	$11.06	$19,587	37,306 Direct	+4.98%	Acquired	7666.1% (price as of 2026-08-21)
Feb. 12, 2012	STX	M	5,284	—	—	40,946 Direct	-11.43%	Disposed	(price as of 2026-08-21)
Feb. 12, 2012	STX	M	2,656	—	—	17,709 Direct	-13.04%	Disposed	(price as of 2026-08-21)
Feb. 12, 2012	STX	M	33,333	—	—	58,334 Direct	-36.36%	Disposed	(price as of 2026-08-21)
Sept. 13, 2010	STX	A	42,500	—	—	42,500 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 13, 2010	STX	A	12,600	—	—	22,800 Direct	-35.59%	Disposed	(price as of 2026-08-21)
Sept. 13, 2010	STX	A	10,200	—	—	10,200 Direct	—	Acquired	(price as of 2026-08-21)
May 20, 2009	STX	P	150,000	$8.24	$1,236,000	151,707 Indirect	+8787.35%	Acquired	10323.9% (price as of 2026-08-21)
March 6, 2009	STX	A	400,000	—	—	400,000 Direct	—	Acquired	(price as of 2026-08-21)

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
April 27, 2015	STX	NQ Stock Options	Ordinary Shares (2,254)	$29.87	Sept. 10, 2019	2,254	Disposed
April 27, 2015	STX	NQ Stock Options	Ordinary Shares (7,925)	$11.16	Sept. 12, 2018	7,925	Disposed
Oct. 31, 2014	STX	NQ Stock Options	Ordinary Shares (2,254)	$29.87	Sept. 10, 2019	2,254	Disposed
Oct. 31, 2014	STX	NQ Stock Options	Ordinary Shares (7,925)	$11.16	Sept. 12, 2018	7,925	Disposed
Oct. 31, 2014	STX	NQ Stock Options	Ordinary Shares (4,428)	$11.06	Sept. 13, 2017	4,428	Disposed
May 6, 2014	STX	NQ Stock Options	Ordinary Shares (2,253)	$29.87	Sept. 10, 2019	2,253	Disposed
May 6, 2014	STX	NQ Stock Options	Ordinary Shares (7,925)	$11.16	Sept. 12, 2018	7,925	Disposed
May 6, 2014	STX	NQ Stock Options	Ordinary Shares (5,312)	$11.06	Sept. 13, 2017	5,312	Disposed
Nov. 7, 2013	STX	NQ Stock Options	Ordinary Shares (4,883)	$29.87	Sept. 10, 2019	4,883	Disposed
Nov. 7, 2013	STX	NQ Stock Options	Ordinary Shares (6,604)	$11.16	Sept. 12, 2018	6,604	Disposed
Nov. 7, 2013	STX	NQ Stock Options	Ordinary Shares (5,513)	$11.06	Sept. 13, 2017	5,313	Disposed
Nov. 7, 2013	STX	NQ Stock Options	Ordinary Shares (33,334)	$3.34	March 6, 2016	33,334	Disposed
May 17, 2013	STX	NQ Stock Options	Ordinary Shares (1,321)	$11.16	Sept. 12, 2018	1,321	Disposed
May 17, 2013	STX	NQ Stock Options	Ordinary Shares (8,333)	$3.34	March 6, 2016	8,333	Disposed
May 8, 2013	STX	NQ Stock Options	Ordinary Shares (2,641)	$11.16	Sept. 12, 2018	2,641	Disposed
May 8, 2013	STX	NQ Stock Options	Ordinary Shares (2,656)	$11.06	Sept. 13, 2017	2,656	Disposed
May 8, 2013	STX	NQ Stock Options	Ordinary Shares (16,667)	$3.34	March 6, 2016	16,667	Disposed
Nov. 2, 2012	STX	NQ Stock Options	Ordinary Shares (17,170)	$11.16	Sept. 12, 2018	17,170	Disposed
Nov. 2, 2012	STX	NQ Stock Options	Ordinary Shares (1,771)	$11.06	Sept. 13, 2017	1,771	Disposed
Nov. 2, 2012	STX	NQ Stock Options	Ordinary Shares (16,667)	$3.34	March 6, 2016	16,667	Disposed
Feb. 12, 2012	STX	NQ Stock Options	Ordinary Shares (5,284)	$11.16	Sept. 12, 2018	5,284	Disposed
Feb. 12, 2012	STX	NQ Stock Options	Ordinary Shares (2,656)	$11.06	Sept. 13, 2017	2,656	Disposed
Feb. 12, 2012	STX	NQ Stock Options	Ordinary Shares (33,333)	$3.34	March 6, 2016	33,333	Disposed
Sept. 13, 2010	STX	Common Shares	Common Shares (42,500)	$11.06	Sept. 13, 2017	42,500	Acquired
March 6, 2009	STX	NQ Stock Options	Common (400,000)	$3.34	March 6, 2016	400,000	Acquired

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

Initial ownership (Form 3) 24 holdings

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

Date	Ticker	Security	Shares	Ownership
Nov. 6, 2012	STX	Ordinary Shares	35,534	Direct
Nov. 6, 2012	STX	Ordinary Shares	91,707	Indirect
Nov. 6, 2012	STX	Ordinary Shares	1,018	Indirect
Nov. 6, 2012	STX	Ordinary Shares	1,018	Indirect
Nov. 6, 2012	STX	NQ Stock Options→ Ordinary Shares (108,334)	108,334	Direct
Nov. 6, 2012	STX	NQ Stock Options→ Ordinary Shares (22,136)	22,136	Direct
Nov. 6, 2012	STX	NQ Stock Options→ Ordinary Shares (63,400)	63,400	Direct
Nov. 6, 2012	STX	NQ Stock Options→ Ordinary Shares (18,030)	18,030	Direct
Sept. 28, 2012	STX	Ordinary Shares	30,953	Direct
Sept. 28, 2012	STX	Ordinary Shares	91,707	Indirect
Sept. 28, 2012	STX	Ordinary Shares	1,018	Indirect
Sept. 28, 2012	STX	Ordinary Shares	1,018	Indirect
Sept. 28, 2012	STX	NQ Stock Options→ Ordinary Shares (108,334)	108,334	Direct
Sept. 28, 2012	STX	NQ Stock Options→ Ordinary Shares (22,136)	22,136	Direct
Sept. 28, 2012	STX	NQ Stock Options→ Ordinary Shares (63,400)	63,400	Direct
Sept. 28, 2012	STX	NQ Stock Options→ Ordinary Shares (18,030)	18,030	Direct
Feb. 19, 2009	STX	Common Shares	28,234	Direct
Feb. 19, 2009	STX	Common Shares	1,707	Indirect
Feb. 19, 2009	STX	NQ Stock Options→ Common (70,000)	70,000	Direct
Feb. 19, 2009	STX	NQ Stock Options→ Common (250,000)	250,000	Direct
Feb. 18, 2009	STX	Common Shares	28,234	Direct
Feb. 18, 2009	STX	Common Shares	1,707	Indirect
Feb. 18, 2009	STX	NQ Stock Options→ Common (70,000)	70,000	Direct
Feb. 18, 2009	STX	NQ Stock Options→ Common (250,000)	250,000	Direct