William John Sempolinski’s Costco COST Stock Holding History

William John Sempolinski’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	$327K	Buy	+350	New	+$349K	0.13%	85

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 $3.37T AUM 44.26% 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

Norges Bank Oslo, Norway $1T AUM

Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Royal Bank of Canada Toronto, Ontario, Canada $672B AUM 33.48% 1-Year Est. Return

William John Sempolinski's COST Position: Q2 2026 in Review

William John Sempolinski opened a new position in Costco (COST) in Q2 2026: 350 shares worth $327K. The stake represents 0.13% of the portfolio and ranks #85 among its holdings.

4,065 funds tracked by Wall St. Rank hold COST as of Q2 2026.

William John Sempolinski held 350 shares of Costco worth $327K as of Q2 2026.
Costco was a new William John Sempolinski position in Q2 2026.
Costco made up 0.13% of William John Sempolinski's portfolio in Q2 2026, its #85 holding.
4,065 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on William John Sempolinski's 13F filing for Q2 2026, filed 14 Aug 2026.