Based on notional value, the top 3 ETF holders of Costco Wholesale (COST) are QQQ ($8.4B), VOO ($5.7B) and IVV ($4.9B).

FUND	HOLDING	% OF FUND	VALUE ($)
QQQ	Costco Wholesale (COST)	2.056%	$8.4B
VOO	Costco Wholesale (COST)	0.69%	$5.7B
IVV	Costco Wholesale (COST)	0.641%	$4.9B
SPY	Costco Wholesale (COST)	0.64%	$4.6B
VTI	Costco Wholesale (COST)	0.62%	$3.6B
VUG	Costco Wholesale (COST)	1.22%	$2.5B
VIG	Costco Wholesale (COST)	1.84%	$1.9B
IWF	Costco Wholesale (COST)	1.243%	$1.6B
QQQM	Costco Wholesale (COST)	2.052%	$1.5B
XLP	Costco Wholesale (COST)	8.795%	$1.3B
VDC	Costco Wholesale (COST)	12%	$872.4M
SCHG	Costco Wholesale (COST)	1.317%	$705.5M
SPLG	Costco Wholesale (COST)	0.692%	$672.3M
IVE	Costco Wholesale (COST)	1.384%	$669.4M
SPHQ	Costco Wholesale (COST)	4.295%	$662.5M
QUAL	Costco Wholesale (COST)	1.14%	$552.7M
VONG	Costco Wholesale (COST)	1.28%	$466.8M
ITOT	Costco Wholesale (COST)	0.567%	$459.9M
SPYV	Costco Wholesale (COST)	1.369%	$437.3M
JEPQ	Costco Wholesale (COST)	1.288%	$419.9M
TQQQ	Costco Wholesale (COST)	1.311%	$412M
SCHX	Costco Wholesale (COST)	0.604%	$381.5M
VRGWX	Costco Wholesale (COST)	1.28%	$336.4M
VV	Costco Wholesale (COST)	0.7%	$334.3M
IUSV	Costco Wholesale (COST)	1.307%	$322.1M

Holdings are tracked for approximately 2000 ETFs.