Keystone Investors’s Costco COST Stock Holding History

Keystone Investors’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 Q2	$22.3M	Buy	+23,840	New	+$23.8M	1.19%	20
2025 Q2	–	Sell	-1,615	Closed	-$1.53M	–	52
2025 Q1	$1.53M	Buy	+1,615	New	+$1.57M	0.21%	26

Other funds holding COST

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Keystone Investors's COST Position: Q2 2026 in Review

Keystone Investors opened a new position in Costco (COST) in Q2 2026: 23,840 shares worth $22.3M. The stake represents 1.19% of the portfolio and ranks #20 among its holdings. This is a return to the name: Keystone Investors previously reported a position in COST as recently as Q1 2025.

Keystone Investors first reported a position in COST in Q1 2025 and has held it in 2 quarters since. 4,260 funds tracked by Wall St. Rank hold COST as of Q2 2026.

Keystone Investors held 23,840 shares of Costco worth $22.3M as of Q2 2026.
Costco was a new Keystone Investors position in Q2 2026.
Costco made up 1.19% of Keystone Investors's portfolio in Q2 2026, its #20 holding.
Keystone Investors first reported a position in Costco in Q1 2025 and has held it in 2 quarters since.
4,260 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Keystone Investors's 13F filing for Q2 2026, filed 14 Aug 2026.