RWWM Inc’s Costco COST Stock Holding History

RWWM Inc’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	$4.21M	Sell	4,227 -75	-2%	-$73.1K	0.31%	19
2025 Q4	$3.71M	Hold	4,302	–	–	0.25%	16
2025 Q3	$3.98M	Buy	+4,302	New	+$4.12M	0.28%	15

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 $137B AUM 18.02% 1-Year Est. Return

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

RWWM Inc's COST Position: Q1 2026 in Review

RWWM Inc reduced its Costco (COST) stake by 1.7% in Q1 2026, selling an estimated $73.1K and leaving 4,227 shares worth $4.21M. The position accounts for 0.31% of the portfolio, ranked #19.

RWWM Inc first reported a position in COST in Q3 2025 and has held it in 3 quarters since. 4,237 funds tracked by Wall St. Rank hold COST as of Q1 2026.

RWWM Inc held 4,227 shares of Costco worth $4.21M as of Q1 2026.
RWWM Inc sold 75 Costco shares in Q1 2026, an estimated $73.1K.
Costco made up 0.31% of RWWM Inc's portfolio in Q1 2026, its #19 holding.
RWWM Inc first reported a position in Costco in Q3 2025 and has held it in 3 quarters since.
4,237 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on RWWM Inc's 13F filing for Q1 2026, filed 4 May 2026.