Cornerstone Capital’s Costco COST Stock Holding History

Cornerstone Capital’s Portfolio COST Stock Details COST Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$1.55M	Buy	1,552 +1,215	+361%	+$1.18M	0.15%	60
2025 Q4	$291K	Hold	337	–	–	0.03%	88
2025 Q3	$312K	Sell	337 -65	-16%	-$62.3K	0.03%	89
2025 Q2	$398K	Sell	402 -60	-13%	-$59.6K	0.04%	81
2025 Q1	$437K	Buy	462 +30	+7%	+$29.2K	0.05%	80
2024 Q4	$396K	Sell	432 -10	-2%	-$9.28K	0.04%	87
2024 Q3	$392K	Hold	442	–	–	0.04%	92
2024 Q2	$376K	Hold	442	–	–	0.04%	84
2024 Q1	$324K	Hold	442	–	–	0.03%	83
2023 Q4	$292K	Hold	442	–	–	0.03%	83
2023 Q3	$250K	Hold	442	–	–	0.03%	84
2023 Q2	$238K	Hold	442	–	–	0.03%	86
2023 Q1	$220K	Buy	+442	New	+$217K	0.03%	84
2022 Q4	–	Sell	-437	Closed	-$206K	–	90
2022 Q3	$206K	Buy	+437	New	+$227K	0.03%	80
2022 Q2	–	Sell	-407	Closed	-$234K	–	92
2022 Q1	$234K	Sell	407 -100	-20%	-$52.5K	0.03%	83
2021 Q4	$288K	Hold	507	–	–	0.03%	82
2021 Q3	$228K	Hold	507	–	–	0.03%	84
2021 Q2	$201K	Buy	+507	New	+$192K	0.02%	88

Other funds holding COST

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

DAM

Diamant Asset Management Ridgefield, Connecticut $147M AUM 25.76% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Cornerstone Capital's COST Position: Q1 2026 in Review

Cornerstone Capital increased its Costco (COST) stake by 361% in Q1 2026, buying an estimated $1.18M and bringing the position to 1,552 shares worth $1.55M. The position accounts for 0.15% of the portfolio, ranked #60.

Cornerstone Capital first reported a position in COST in Q2 2021 and has held it in 18 quarters since. 4,239 funds tracked by Wall St. Rank hold COST as of Q1 2026.

Cornerstone Capital held 1,552 shares of Costco worth $1.55M as of Q1 2026.
Cornerstone Capital bought 1,215 Costco shares in Q1 2026, an estimated $1.18M.
Costco made up 0.15% of Cornerstone Capital's portfolio in Q1 2026, its #60 holding.
Cornerstone Capital first reported a position in Costco in Q2 2021 and has held it in 18 quarters since.
4,239 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Cornerstone Capital's 13F filing for Q1 2026, filed 12 May 2026.