Port Capital’s Costco COST Stock Holding History

Port Capital’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	$333K	Buy	356 +75	+27%	+$74.7K	0.01%	88
2026 Q1	$280K	Sell	281 -95	-25%	-$92.6K	0.01%	75
2025 Q4	$324K	Hold	376	–	–	0.01%	73
2025 Q3	$348K	Sell	376 -12	-3%	-$11.5K	0.01%	73
2025 Q2	$384K	Sell	388 -83	-18%	-$82.5K	0.02%	71
2025 Q1	$445K	Sell	471 -56	-11%	-$54.6K	0.02%	68
2024 Q4	$483K	Sell	527 -2	-0.4%	-$1.86K	0.02%	69
2024 Q3	$469K	Sell	529 -59	-10%	-$51.2K	0.02%	68
2024 Q2	$500K	Sell	588 -69	-11%	-$53.8K	0.03%	64
2024 Q1	$481K	Buy	657 +209	+47%	+$149K	0.02%	64
2023 Q4	$296K	Sell	448 -59	-12%	-$35K	0.02%	78
2023 Q3	$286K	Sell	507 -30	-6%	-$16.6K	0.02%	75
2023 Q2	$289K	Buy	+537	New	+$272K	0.02%	74

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

Port Capital's COST Position: Q2 2026 in Review

Port Capital increased its Costco (COST) stake by 27% in Q2 2026, buying an estimated $74.7K and bringing the position to 356 shares worth $333K. The position accounts for 0.01% of the portfolio, ranked #88.

Port Capital first reported a position in COST in Q2 2023 and has held it in 13 quarters since. The position peaked at $500K in Q2 2024. 4,238 funds tracked by Wall St. Rank hold COST as of Q2 2026.

Port Capital held 356 shares of Costco worth $333K as of Q2 2026.
Port Capital bought 75 Costco shares in Q2 2026, an estimated $74.7K.
Costco made up 0.01% of Port Capital's portfolio in Q2 2026, its #88 holding.
Port Capital first reported a position in Costco in Q2 2023 and has held it in 13 quarters since.
Port Capital's Costco position peaked at $500K in Q2 2024.
4,238 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Port Capital's 13F filing for Q2 2026, filed 14 Aug 2026.