James C Klauer

Insider

First SEC filing: Nov. 14, 2018 · Latest: Nov. 14, 2018

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.
Initial holdings The stakes this person held when they first started reporting.

Insider at

COST selling Jan. 14, 2026

Insider transactions

0 buys (P) 1 sells (S) Net: $-1,408,500 + 60 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

60 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Jan. 14, 2026	COST	S	1,500	$939.00	$1,408,500	44,837 Direct	-3.24%	Disposed	-0.2% (price as of 2026-08-20)
Oct. 22, 2025	COST	F	111	$944.68	$104,859	46,337 Direct	-0.24%	Disposed	-0.8% (price as of 2026-08-20)
Oct. 22, 2025	COST	F	177	$944.68	$167,208	46,448 Direct	-0.38%	Disposed	-0.8% (price as of 2026-08-20)
Oct. 22, 2025	COST	F	199	$944.68	$187,991	46,625 Direct	-0.42%	Disposed	-0.8% (price as of 2026-08-20)
Oct. 22, 2025	COST	F	191	$944.68	$180,434	46,824 Direct	-0.41%	Disposed	-0.8% (price as of 2026-08-20)
Oct. 22, 2025	COST	F	240	$944.68	$226,723	47,014 Direct	-0.51%	Disposed	-0.8% (price as of 2026-08-20)
Sept. 10, 2025	COST	F	958	$956.29	$916,126	47,254 Direct	-1.99%	Disposed	-2.0% (price as of 2026-08-20)
Sept. 10, 2025	COST	A	4,219	—	—	48,213 Direct	+9.59%	Acquired	(price as of 2026-08-20)
April 17, 2025	COST	S	4,000	$981.07	$3,924,280	43,994 Direct	-8.33%	Disposed	-4.4% (price as of 2026-08-20)
Oct. 22, 2024	COST	F	177	$893.49	$158,148	47,994 Direct	-0.37%	Disposed	4.9% (price as of 2026-08-20)
Oct. 22, 2024	COST	F	198	$893.49	$176,911	48,170 Direct	-0.41%	Disposed	4.9% (price as of 2026-08-20)
Oct. 22, 2024	COST	F	191	$893.49	$170,657	48,369 Direct	-0.39%	Disposed	4.9% (price as of 2026-08-20)
Oct. 22, 2024	COST	F	240	$893.49	$214,438	48,560 Direct	-0.49%	Disposed	4.9% (price as of 2026-08-20)
Oct. 22, 2024	COST	F	291	$893.49	$260,006	48,800 Direct	-0.59%	Disposed	4.9% (price as of 2026-08-20)
Sept. 16, 2024	COST	F	1,610	$907.87	$1,461,671	49,091 Direct	-3.18%	Disposed	3.3% (price as of 2026-08-20)
Sept. 16, 2024	COST	A	6,737	—	—	50,701 Direct	+15.32%	Acquired	(price as of 2026-08-20)
Jan. 12, 2024	COST	A	96	—	—	43,964 Direct	+0.22%	Acquired	(price as of 2026-08-20)
Jan. 12, 2024	COST	A	60	—	—	43,928 Direct	+0.14%	Acquired	(price as of 2026-08-20)
Oct. 22, 2023	COST	F	188	$552.93	$103,951	43,868 Direct	-0.43%	Disposed	69.6% (price as of 2026-08-20)
Oct. 22, 2023	COST	F	360	$552.93	$199,055	44,578 Direct	-0.80%	Disposed	69.6% (price as of 2026-08-20)
Oct. 22, 2023	COST	F	195	$552.93	$107,821	44,938 Direct	-0.43%	Disposed	69.6% (price as of 2026-08-20)
Oct. 22, 2023	COST	F	236	$552.93	$130,491	44,056 Direct	-0.53%	Disposed	69.6% (price as of 2026-08-20)
Oct. 22, 2023	COST	F	286	$552.93	$158,138	44,292 Direct	-0.64%	Disposed	69.6% (price as of 2026-08-20)
Oct. 11, 2023	COST	S	1,500	$562.01	$843,015	45,134 Direct	-3.22%	Disposed	66.8% (price as of 2026-08-20)
Sept. 15, 2023	COST	F	1,679	$556.36	$934,128	46,634 Direct	-3.48%	Disposed	68.5% (price as of 2026-08-20)
Sept. 15, 2023	COST	A	7,429	—	—	48,313 Direct	+18.17%	Acquired	(price as of 2026-08-20)
July 20, 2023	COST	W	98	—	—	98 Indirect	—	Acquired	(price as of 2026-08-20)
Jan. 27, 2023	COST	S	2,500	$503.69	$1,259,225	40,884 Direct	-5.76%	Disposed	86.1% (price as of 2026-08-20)
Oct. 22, 2022	COST	F	188	$478.18	$89,898	43,384 Direct	-0.43%	Disposed	96.1% (price as of 2026-08-20)
Oct. 22, 2022	COST	F	236	$478.18	$112,850	43,572 Direct	-0.54%	Disposed	96.1% (price as of 2026-08-20)
Oct. 22, 2022	COST	F	287	$478.18	$137,238	43,808 Direct	-0.65%	Disposed	96.1% (price as of 2026-08-20)
Oct. 22, 2022	COST	F	362	$478.18	$173,101	44,095 Direct	-0.81%	Disposed	96.1% (price as of 2026-08-20)
Oct. 22, 2022	COST	F	255	$478.18	$121,936	44,457 Direct	-0.57%	Disposed	96.1% (price as of 2026-08-20)
Sept. 12, 2022	COST	A	7,154	—	—	44,712 Direct	+19.05%	Acquired	(price as of 2026-08-20)
Sept. 12, 2022	COST	F	1,600	$539.52	$863,232	42,329 Direct	-3.64%	Disposed	73.8% (price as of 2026-08-20)
Sept. 12, 2022	COST	A	4,771	—	—	43,929 Direct	+12.18%	Acquired	(price as of 2026-08-20)
Oct. 22, 2021	COST	F	1,417	$481.99	$682,980	39,158 Direct	-3.49%	Disposed	94.5% (price as of 2026-08-20)
Oct. 22, 2021	COST	F	1,435	$481.99	$691,656	40,575 Direct	-3.42%	Disposed	94.5% (price as of 2026-08-20)
Oct. 22, 2021	COST	F	1,445	$481.99	$696,476	42,010 Direct	-3.33%	Disposed	94.5% (price as of 2026-08-20)
Oct. 22, 2021	COST	F	764	$481.99	$368,240	43,455 Direct	-1.73%	Disposed	94.5% (price as of 2026-08-20)
Oct. 22, 2021	COST	F	551	$481.99	$265,576	44,219 Direct	-1.23%	Disposed	94.5% (price as of 2026-08-20)
Sept. 28, 2021	COST	G	15,000	—	—	44,770 Direct	-25.10%	Disposed	(price as of 2026-08-20)
Sept. 14, 2021	COST	F	855	$458.41	$391,941	59,770 Direct	-1.41%	Disposed	104.5% (price as of 2026-08-20)
Sept. 14, 2021	COST	A	8,998	—	—	60,625 Direct	+17.43%	Acquired	(price as of 2026-08-20)
June 14, 2021	COST	S	5,000	$380.53	$1,902,650	51,627 Direct	-8.83%	Disposed	146.4% (price as of 2026-08-20)
Dec. 11, 2020	COST	A	288	—	—	56,627 Direct	+0.51%	Acquired	(price as of 2026-08-20)
Oct. 22, 2020	COST	F	563	$375.75	$211,547	56,339 Direct	-0.99%	Disposed	149.5% (price as of 2026-08-20)
Oct. 22, 2020	COST	F	709	$375.75	$266,407	56,902 Direct	-1.23%	Disposed	149.5% (price as of 2026-08-20)
Oct. 22, 2020	COST	F	500	$375.75	$187,875	57,611 Direct	-0.86%	Disposed	149.5% (price as of 2026-08-20)
Oct. 22, 2020	COST	F	540	$375.75	$202,905	58,111 Direct	-0.92%	Disposed	149.5% (price as of 2026-08-20)
Oct. 22, 2020	COST	F	509	$375.75	$191,257	58,651 Direct	-0.86%	Disposed	149.5% (price as of 2026-08-20)
Sept. 14, 2020	COST	F	972	$342.92	$333,318	59,160 Direct	-1.62%	Disposed	173.4% (price as of 2026-08-20)
Sept. 14, 2020	COST	A	10,730	—	—	60,132 Direct	+21.72%	Acquired	(price as of 2026-08-20)
Aug. 7, 2020	COST	S	4,000	$342.72	$1,370,880	49,402 Direct	-7.49%	Disposed	173.6% (price as of 2026-08-20)
Oct. 22, 2019	COST	F	709	$299.97	$212,679	53,402 Direct	-1.31%	Disposed	212.5% (price as of 2026-08-20)
Oct. 22, 2019	COST	F	500	$299.97	$149,985	54,111 Direct	-0.92%	Disposed	212.5% (price as of 2026-08-20)
Oct. 22, 2019	COST	F	540	$299.97	$161,984	54,611 Direct	-0.98%	Disposed	212.5% (price as of 2026-08-20)
Oct. 22, 2019	COST	F	509	$299.97	$152,685	55,151 Direct	-0.91%	Disposed	212.5% (price as of 2026-08-20)
Oct. 22, 2019	COST	F	599	$299.97	$179,682	55,660 Direct	-1.06%	Disposed	212.5% (price as of 2026-08-20)
Sept. 18, 2019	COST	F	1,261	$292.43	$368,754	56,259 Direct	-2.19%	Disposed	220.6% (price as of 2026-08-20)
Sept. 18, 2019	COST	A	13,510	—	—	57,520 Direct	+30.70%	Acquired	(price as of 2026-08-20)
June 7, 2019	COST	S	4,300	$255.49	$1,098,607	44,010 Direct	-8.90%	Disposed	266.9% (price as of 2026-08-20)
June 7, 2019	COST	S	700	$255.80	$179,060	48,310 Direct	-1.43%	Disposed	266.5% (price as of 2026-08-20)
Oct. 22, 2018	COST	F	500	$229.06	$114,530	28,715 Direct	-1.71%	Disposed	309.3% (price as of 2026-08-20)
Oct. 22, 2018	COST	F	536	$229.06	$122,776	29,215 Direct	-1.80%	Disposed	309.3% (price as of 2026-08-20)
Oct. 22, 2018	COST	F	315	$229.06	$72,154	29,751 Direct	-1.05%	Disposed	309.3% (price as of 2026-08-20)
Oct. 22, 2018	COST	F	371	$229.06	$84,981	30,066 Direct	-1.22%	Disposed	309.3% (price as of 2026-08-20)
Oct. 22, 2018	COST	F	371	$229.06	$84,981	30,437 Direct	-1.20%	Disposed	309.3% (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.

Initial ownership (Form 3) 2 holdings

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

Date	Ticker	Security	Shares	Ownership
Nov. 14, 2018	COST	Common Stock	—	Direct
March 8, 2018	COST	Common Stock	30,808	Direct