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 Q2	$4.04M	Buy	4,319 +92	+2%	+$91.7K	0.3%	21
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 $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

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

RWWM Inc's COST Position: Q2 2026 in Review

RWWM Inc increased its Costco (COST) stake by 2.2% in Q2 2026, buying an estimated $91.7K and bringing the position to 4,319 shares worth $4.04M. The position accounts for 0.3% of the portfolio, ranked #21.

RWWM Inc first reported a position in COST in Q3 2025 and has held it in 4 quarters since. The position peaked at $4.21M in Q1 2026. 4,238 funds tracked by Wall St. Rank hold COST as of Q2 2026.

RWWM Inc held 4,319 shares of Costco worth $4.04M as of Q2 2026.
RWWM Inc bought 92 Costco shares in Q2 2026, an estimated $91.7K.
Costco made up 0.3% of RWWM Inc's portfolio in Q2 2026, its #21 holding.
RWWM Inc first reported a position in Costco in Q3 2025 and has held it in 4 quarters since.
RWWM Inc's Costco position peaked at $4.21M in Q1 2026.
4,238 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on RWWM Inc's 13F filing for Q2 2026, filed 14 Aug 2026.