David S Petterson

Insider

First SEC filing: Sept. 24, 2003 · Latest: Sept. 24, 2003

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.

Insider at

COST selling Dec. 28, 2016

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
Dec. 28, 2016	COST	S	700	$161.13	$112,791	20,926 Direct	-3.24%	Disposed	481.8% (price as of 2026-08-20)
Dec. 9, 2016	COST	S	4,000	$158.55	$634,200	21,626 Direct	-15.61%	Disposed	491.3% (price as of 2026-08-20)
Oct. 26, 2016	COST	S	3,000	$151.10	$453,300	25,626 Direct	-10.48%	Disposed	520.5% (price as of 2026-08-20)
Oct. 22, 2016	COST	F	1,396	$148.97	$207,962	28,626 Direct	-4.65%	Disposed	529.3% (price as of 2026-08-20)
Oct. 22, 2016	COST	A	9,970	—	—	30,022 Direct	+49.72%	Acquired	(price as of 2026-08-20)
Oct. 22, 2016	COST	F	522	$148.97	$77,762	20,052 Direct	-2.54%	Disposed	529.3% (price as of 2026-08-20)
Oct. 22, 2016	COST	F	404	$148.97	$60,184	20,574 Direct	-1.93%	Disposed	529.3% (price as of 2026-08-20)
Oct. 22, 2016	COST	F	404	$148.97	$60,184	20,978 Direct	-1.89%	Disposed	529.3% (price as of 2026-08-20)
Oct. 22, 2016	COST	F	512	$148.97	$76,273	21,382 Direct	-2.34%	Disposed	529.3% (price as of 2026-08-20)
Oct. 22, 2016	COST	F	512	$148.97	$76,273	21,894 Direct	-2.29%	Disposed	529.3% (price as of 2026-08-20)
Oct. 30, 2015	COST	S	3,800	$158.62	$602,756	22,406 Direct	-14.50%	Disposed	491.0% (price as of 2026-08-20)
Oct. 27, 2015	COST	S	3,738	$157.50	$588,735	26,206 Direct	-12.48%	Disposed	495.3% (price as of 2026-08-20)
Oct. 22, 2015	COST	A	9,390	—	—	29,944 Direct	+45.68%	Acquired	(price as of 2026-08-20)
Oct. 22, 2015	COST	F	1,315	$158.15	$207,967	20,554 Direct	-6.01%	Disposed	492.8% (price as of 2026-08-20)
Oct. 22, 2015	COST	F	621	$158.15	$98,211	21,869 Direct	-2.76%	Disposed	492.8% (price as of 2026-08-20)
Oct. 22, 2015	COST	F	517	$158.15	$81,764	22,490 Direct	-2.25%	Disposed	492.8% (price as of 2026-08-20)
Oct. 22, 2015	COST	F	512	$158.15	$80,973	23,007 Direct	-2.18%	Disposed	492.8% (price as of 2026-08-20)
Oct. 22, 2015	COST	F	512	$158.15	$80,973	23,519 Direct	-2.13%	Disposed	492.8% (price as of 2026-08-20)
Oct. 22, 2015	COST	F	512	$158.15	$80,973	24,031 Direct	-2.09%	Disposed	492.8% (price as of 2026-08-20)
Feb. 27, 2015	COST	A	1,005	$146.96	$147,695	24,543 Direct	+4.27%	Acquired	537.9% (price as of 2026-08-20)
Oct. 23, 2014	COST	S	15,400	$131.14	$2,019,556	23,538 Direct	-39.55%	Disposed	614.9% (price as of 2026-08-20)
Oct. 22, 2014	COST	F	736	$130.54	$96,077	47,448 Direct	-1.53%	Disposed	618.2% (price as of 2026-08-20)
Oct. 22, 2014	COST	F	982	$130.54	$128,190	46,466 Direct	-2.07%	Disposed	618.2% (price as of 2026-08-20)
Oct. 22, 2014	COST	F	1,702	$130.54	$222,179	44,764 Direct	-3.66%	Disposed	618.2% (price as of 2026-08-20)
Oct. 22, 2014	COST	F	2,258	$130.54	$294,759	42,506 Direct	-5.04%	Disposed	618.2% (price as of 2026-08-20)
Oct. 22, 2014	COST	F	2,081	$130.54	$271,654	40,425 Direct	-4.90%	Disposed	618.2% (price as of 2026-08-20)
Oct. 22, 2014	COST	F	1,487	$130.54	$194,113	38,938 Direct	-3.68%	Disposed	618.2% (price as of 2026-08-20)
Oct. 22, 2014	COST	A	10,625	—	—	48,184 Direct	+28.29%	Acquired	(price as of 2026-08-20)
Aug. 18, 2014	COST	A	25	—	—	37,559 Direct	+0.07%	Acquired	(price as of 2026-08-20)
Oct. 25, 2013	COST	S	3,905	$115.95	$452,785	37,534 Direct	-9.42%	Disposed	708.6% (price as of 2026-08-20)
Oct. 24, 2013	COST	S	2,500	$116.14	$290,350	41,439 Direct	-5.69%	Disposed	707.2% (price as of 2026-08-20)
Oct. 22, 2013	COST	S	2,500	$117.09	$292,725	43,939 Direct	-5.38%	Disposed	700.7% (price as of 2026-08-20)
Oct. 22, 2013	COST	A	10,625	—	—	46,439 Direct	+29.67%	Acquired	(price as of 2026-08-20)
Oct. 22, 2013	COST	F	1,130	$117.81	$133,125	35,814 Direct	-3.06%	Disposed	695.8% (price as of 2026-08-20)
Oct. 22, 2013	COST	F	1,129	$117.81	$133,007	36,944 Direct	-2.97%	Disposed	695.8% (price as of 2026-08-20)
Oct. 22, 2013	COST	F	821	$117.81	$96,722	38,073 Direct	-2.11%	Disposed	695.8% (price as of 2026-08-20)
Oct. 22, 2013	COST	F	736	$117.81	$86,708	38,894 Direct	-1.86%	Disposed	695.8% (price as of 2026-08-20)
Oct. 22, 2013	COST	F	736	$117.81	$86,708	39,630 Direct	-1.82%	Disposed	695.8% (price as of 2026-08-20)
Dec. 26, 2012	COST	S	1,615	—	—	40,366 Direct	-3.85%	Disposed	(price as of 2026-08-20)
Dec. 12, 2012	COST	A	2,858	$98.31	$280,970	41,981 Direct	+7.31%	Acquired	853.6% (price as of 2026-08-20)
Oct. 26, 2012	COST	S	3,676	$96.72	$355,543	39,123 Direct	-8.59%	Disposed	869.3% (price as of 2026-08-20)
Oct. 24, 2012	COST	S	1,838	$95.80	$176,080	42,799 Direct	-4.12%	Disposed	878.6% (price as of 2026-08-20)
Oct. 22, 2012	COST	A	12,500	—	—	44,637 Direct	+38.90%	Acquired	(price as of 2026-08-20)
Oct. 22, 2012	COST	F	886	$95.00	$84,170	32,137 Direct	-2.68%	Disposed	886.9% (price as of 2026-08-20)
Oct. 22, 2012	COST	F	662	$95.00	$62,890	33,023 Direct	-1.97%	Disposed	886.9% (price as of 2026-08-20)
Oct. 22, 2012	COST	F	662	$95.00	$62,890	33,685 Direct	-1.93%	Disposed	886.9% (price as of 2026-08-20)
Oct. 22, 2012	COST	F	662	$95.00	$62,890	34,347 Direct	-1.89%	Disposed	886.9% (price as of 2026-08-20)
Oct. 17, 2012	COST	S	1,835	$96.48	$177,041	35,009 Direct	-4.98%	Disposed	871.7% (price as of 2026-08-20)
Oct. 17, 2012	COST	F	655	$96.78	$63,391	36,844 Direct	-1.75%	Disposed	868.7% (price as of 2026-08-20)
Oct. 24, 2011	COST	S	5,326	—	—	37,499 Direct	-12.44%	Disposed	(price as of 2026-08-20)
Oct. 22, 2011	COST	A	12,500	—	—	42,825 Direct	+41.22%	Acquired	(price as of 2026-08-20)
Oct. 22, 2011	COST	F	851	$85.30	$72,590	30,325 Direct	-2.73%	Disposed	999.1% (price as of 2026-08-20)
Oct. 22, 2011	COST	F	662	$85.30	$56,469	31,176 Direct	-2.08%	Disposed	999.1% (price as of 2026-08-20)
Oct. 22, 2011	COST	F	662	$85.30	$56,469	31,838 Direct	-2.04%	Disposed	999.1% (price as of 2026-08-20)
Oct. 20, 2011	COST	S	1,844	—	—	32,500 Direct	-5.37%	Disposed	(price as of 2026-08-20)
Oct. 19, 2011	COST	F	656	$84.38	$55,353	34,344 Direct	-1.87%	Disposed	1011.1% (price as of 2026-08-20)
Oct. 17, 2011	COST	S	1,845	$82.35	$151,936	35,000 Direct	-5.01%	Disposed	1038.5% (price as of 2026-08-20)
Oct. 17, 2011	COST	F	655	$82.36	$53,946	36,845 Direct	-1.75%	Disposed	1038.3% (price as of 2026-08-20)
April 13, 2011	COST	S	931	—	—	37,500 Direct	-2.42%	Disposed	(price as of 2026-08-20)
April 12, 2011	COST	F	319	$76.45	$24,388	38,431 Direct	-0.82%	Disposed	1126.3% (price as of 2026-08-20)
Nov. 8, 2010	COST	M	7,500	$43.79	$328,425	0 Direct	-100.00%	Disposed	2040.9% (price as of 2026-08-20)
Nov. 8, 2010	COST	S	1,838	$64.78	$119,066	38,750 Direct	-4.53%	Disposed	1347.2% (price as of 2026-08-20)
Nov. 8, 2010	COST	S	7,500	—	—	40,588 Direct	-15.60%	Disposed	(price as of 2026-08-20)
Nov. 8, 2010	COST	M	7,500	$43.79	$328,425	48,088 Direct	+18.48%	Acquired	2040.9% (price as of 2026-08-20)
Oct. 28, 2010	COST	S	1,838	—	—	40,588 Direct	-4.33%	Disposed	(price as of 2026-08-20)
Oct. 22, 2010	COST	A	12,500	—	—	42,426 Direct	+41.77%	Acquired	(price as of 2026-08-20)
Oct. 22, 2010	COST	F	662	$64.03	$42,388	29,926 Direct	-2.16%	Disposed	1364.2% (price as of 2026-08-20)
Oct. 22, 2010	COST	F	662	$64.03	$42,388	30,588 Direct	-2.12%	Disposed	1364.2% (price as of 2026-08-20)
Oct. 21, 2010	COST	S	1,815	—	—	31,250 Direct	-5.49%	Disposed	(price as of 2026-08-20)
Oct. 20, 2010	COST	S	1,875	$62.77	$117,694	33,065 Direct	-5.37%	Disposed	1393.6% (price as of 2026-08-20)
Oct. 19, 2010	COST	F	685	$62.21	$42,614	34,940 Direct	-1.92%	Disposed	1407.0% (price as of 2026-08-20)
Oct. 17, 2010	COST	F	625	$63.70	$39,812	35,625 Direct	-1.72%	Disposed	1371.8% (price as of 2026-08-20)
Oct. 15, 2010	COST	M	7,500	$43.79	$328,425	7,500 Direct	-50.00%	Disposed	2040.9% (price as of 2026-08-20)
Oct. 15, 2010	COST	S	7,500	—	—	36,250 Direct	-17.14%	Disposed	(price as of 2026-08-20)
Oct. 15, 2010	COST	M	7,500	$43.79	$328,425	43,750 Direct	+20.69%	Acquired	2040.9% (price as of 2026-08-20)
April 23, 2010	COST	S	932	$60.24	$56,144	36,250 Direct	-2.51%	Disposed	1456.3% (price as of 2026-08-20)
April 12, 2010	COST	F	318	$60.35	$19,191	37,182 Direct	-0.85%	Disposed	1453.5% (price as of 2026-08-20)
Nov. 9, 2009	COST	S	3,689	$60.00	$221,340	37,500 Direct	-8.96%	Disposed	1462.5% (price as of 2026-08-20)
Oct. 29, 2009	COST	S	1,838	$57.68	$106,016	41,189 Direct	-4.27%	Disposed	1525.4% (price as of 2026-08-20)
Oct. 22, 2009	COST	A	12,500	—	—	43,689 Direct	+40.08%	Acquired	(price as of 2026-08-20)
Oct. 19, 2009	COST	F	649	$59.23	$38,440	31,189 Direct	-2.04%	Disposed	1482.8% (price as of 2026-08-20)
Oct. 17, 2009	COST	F	662	$58.48	$38,714	31,838 Direct	-2.04%	Disposed	1503.1% (price as of 2026-08-20)
Oct. 14, 2009	COST	M	7,500	$37.35	$280,125	0 Direct	-100.00%	Disposed	2410.1% (price as of 2026-08-20)
Oct. 14, 2009	COST	S	7,500	$58.64	$439,800	32,500 Direct	-18.75%	Disposed	1498.8% (price as of 2026-08-20)
Oct. 14, 2009	COST	M	7,500	$37.35	$280,125	40,000 Direct	+23.08%	Acquired	2410.1% (price as of 2026-08-20)
April 22, 2009	COST	S	933	—	—	32,500 Direct	-2.79%	Disposed	(price as of 2026-08-20)
April 12, 2009	COST	F	317	$46.90	$14,867	33,433 Direct	-0.94%	Disposed	1899.0% (price as of 2026-08-20)
Oct. 22, 2008	COST	A	12,500	—	—	33,750 Direct	+58.82%	Acquired	(price as of 2026-08-20)
Oct. 22, 2008	COST	S	3,194	$54.76	$174,903	21,250 Direct	-13.07%	Disposed	1612.1% (price as of 2026-08-20)
Oct. 19, 2008	COST	F	903	$57.98	$52,356	24,444 Direct	-3.56%	Disposed	1517.0% (price as of 2026-08-20)
Oct. 17, 2008	COST	F	903	$57.98	$52,356	25,347 Direct	-3.44%	Disposed	1517.0% (price as of 2026-08-20)
July 1, 2008	COST	M	7,500	$49.81	$373,575	0 Direct	-100.00%	Disposed	1782.2% (price as of 2026-08-20)
July 1, 2008	COST	S	7,500	—	—	26,250 Direct	-22.22%	Disposed	(price as of 2026-08-20)
July 1, 2008	COST	M	7,500	$49.81	$373,575	33,750 Direct	+28.57%	Acquired	1782.2% (price as of 2026-08-20)
May 1, 2008	COST	M	7,500	$33.75	$253,125	0 Direct	-100.00%	Disposed	2677.8% (price as of 2026-08-20)
April 18, 2008	COST	M	2,500	$37.35	$93,375	7,500 Direct	-25.00%	Disposed	2410.1% (price as of 2026-08-20)
April 18, 2008	COST	M	7,500	$43.79	$328,425	15,000 Direct	-33.33%	Disposed	2040.9% (price as of 2026-08-20)
April 18, 2008	COST	S	10,000	—	—	26,250 Direct	-27.59%	Disposed	(price as of 2026-08-20)
April 18, 2008	COST	M	7,500	$43.79	$328,425	36,250 Direct	+26.09%	Acquired	2040.9% (price as of 2026-08-20)
April 18, 2008	COST	M	2,500	$37.35	$93,375	28,750 Direct	+9.52%	Acquired	2410.1% (price as of 2026-08-20)

Showing latest 100 of 235 transactions

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
Nov. 8, 2010	COST	Stock Option	Common Stock (7,500)	$43.79	April 1, 2015	7,500	Disposed
Oct. 15, 2010	COST	Stock Option	Common Stock (7,500)	$43.79	April 1, 2015	7,500	Disposed
Oct. 14, 2009	COST	Stock Option	Common Stock (7,500)	$37.35	April 1, 2014	7,500	Disposed
July 1, 2008	COST	Stock Option	Common Stock (7,500)	$49.81	March 13, 2010	7,500	Disposed
May 1, 2008	COST	Stock Option	Common Stock (7,500)	$33.75	April 1, 2013	7,500	Disposed
April 18, 2008	COST	Stock Option	Common Stock (2,500)	$37.35	April 1, 2014	2,500	Disposed
April 18, 2008	COST	Stock Option	Common Stock (7,500)	$43.79	April 1, 2015	7,500	Disposed
April 18, 2008	COST	Stock Option	Common Stock (7,500)	$43.79	April 1, 2015	7,500	Disposed
April 18, 2008	COST	Stock Option	Common Stock (2,500)	$37.35	April 1, 2014	2,500	Disposed
April 3, 2008	COST	Stock Option	Common Stock (5,000)	$37.35	April 1, 2014	5,000	Disposed
Feb. 1, 2008	COST	Stock Option	Common Stock (10,000)	$43.79	April 1, 2015	10,000	Disposed
Jan. 16, 2008	COST	Stock Option	Common Stock (5,000)	$43.79	April 1, 2015	5,000	Disposed
Nov. 23, 2007	COST	Stock Option	Common Stock (10,000)	$43.00	March 13, 2010	10,000	Disposed
Oct. 12, 2007	COST	Stock Option	Common Stock (10,000)	$43.00	March 13, 2010	10,000	Disposed
July 6, 2007	COST	Stock Option	Common Stock (7,500)	$39.25	April 2, 2012	7,500	Disposed
June 27, 2007	COST	Stock Option	Common Stock (7,500)	$37.35	April 1, 2014	7,500	Disposed
June 13, 2007	COST	Stock Option	Common Stock (7,500)	$33.75	April 1, 2013	7,500	Disposed
Feb. 16, 2007	COST	Stock Option	Common Stock (10,000)	$43.00	March 13, 2010	10,000	Disposed
Jan. 18, 2007	COST	Stock Option	Common Stock (7,500)	$37.35	April 1, 2014	7,500	Disposed
Jan. 9, 2007	COST	Stock Option	Common Stock (10,000)	$39.25	April 2, 2012	10,000	Disposed
Oct. 26, 2006	COST	Stock Option	Common Stock (7,500)	$34.28	April 24, 2011	7,500	Disposed
Oct. 16, 2006	COST	Stock Option	Common Stock (7,500)	$30.41	April 1, 2013	7,500	Disposed
March 14, 2006	COST	Stock Option	Common Stock (10,000)	$38.79	April 2, 2012	10,000	Disposed
March 6, 2006	COST	Stock Option	Common Stock (10,000)	$38.79	April 2, 2012	10,000	Disposed
Dec. 23, 2005	COST	Stock Option	Common Stock (7,500)	$37.35	March 31, 2014	7,500	Disposed
Dec. 14, 2005	COST	Stock Option	Common Stock (5,000)	$36.91	Feb. 9, 2009	5,000	Disposed
Nov. 18, 2005	COST	Stock Option	Common Stock (5,000)	$36.91	Feb. 9, 2009	5,000	Disposed
Nov. 10, 2005	COST	Stock Option	Common Stock (5,000)	$36.91	Feb. 9, 2009	5,000	Disposed
Oct. 14, 2005	COST	Stock Option	Common Stock (10,000)	$36.91	Feb. 9, 2009	10,000	Disposed
Oct. 14, 2005	COST	Stock Option	Common Stock (9,600)	$36.91	Feb. 9, 2009	9,600	Disposed
Oct. 14, 2005	COST	Stock Option	Common Stock (400)	$36.91	Feb. 9, 2009	400	Disposed
July 28, 2005	COST	Stock Option	Common Stock (10,000)	$36.91	Feb. 9, 2009	10,000	Disposed
July 26, 2005	COST	Stock Option	Common Stock (5,000)	$36.91	Feb. 9, 2009	5,000	Disposed
June 7, 2005	COST	Stock Option	Common Stock (7,500)	$34.28	April 24, 2011	7,500	Disposed
June 7, 2005	COST	Stock Option	Common Stock (7,500)	$30.41	April 1, 2013	7,500	Disposed
April 1, 2005	COST	Stock Option	Common Stock (37,500)	$43.79	April 1, 2015	37,500	Acquired
Nov. 23, 2004	COST	Stock Option	Common Stock (2,500)	$34.28	April 24, 2011	2,500	Disposed
Oct. 19, 2004	COST	Stock Option	Common Stock (10,000)	$34.28	April 24, 2011	10,000	Disposed
Aug. 26, 2004	COST	Stock Option	Common Stock (10,000)	$34.28	April 24, 2011	10,000	Disposed
June 15, 2004	COST	Stock Option	Common Stock (7,500)	$30.41	April 1, 2013	7,500	Disposed
June 7, 2004	COST	Stock Option	Common Stock (5,000)	$22.88	Feb. 17, 2008	5,000	Disposed
April 1, 2004	COST	Stock Option	Common Stock (37,500)	$37.35	March 31, 2014	37,500	Acquired
April 1, 2004	COST	Stock Option	Common Stock (37,500)	$37.35	March 31, 2014	37,500	Acquired
Feb. 10, 2004	COST	Stock Option	Common Stock (5,000)	$22.88	Feb. 17, 2008	5,000	Disposed

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