Corundum Trust Company’s Costco COST Stock Holding History

Corundum Trust Company’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
2025 Q4	–	Sell	-18	Closed	-$16.7K	–	66
2025 Q3	$16.7K	Buy	+18	New	+$17.3K	0.04%	111

Other funds holding COST

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

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

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

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

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

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

Norges Bank Oslo, Norway $935B AUM

Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return

Corundum Trust Company's COST Position: Q4 2025 in Review

Corundum Trust Company sold out of Costco (COST) in Q4 2025, closing a stake of 18 shares — an estimated $16.7K sold.

Corundum Trust Company first reported a position in COST in Q3 2025 and held it in 1 quarter. The position peaked at $16.7K in Q3 2025. 4,118 funds tracked by Wall St. Rank hold COST as of Q4 2025.

Corundum Trust Company reported no remaining Costco position as of Q4 2025 after selling out during the quarter.
Corundum Trust Company sold 18 Costco shares in Q4 2025, an estimated $16.7K.
Corundum Trust Company first reported a position in Costco in Q3 2025 and held it in 1 quarter.
Corundum Trust Company's Costco position peaked at $16.7K in Q3 2025.
4,118 funds tracked by Wall St. Rank held Costco as of Q4 2025.

Based on Corundum Trust Company's 13F filing for Q4 2025, filed 20 Jan 2026.