Byrne Asset Management’s Costco COST Stock Holding History

Byrne Asset Management’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	$107K	Sell	114 -55	-33%	-$54.8K	0.06%	237
2026 Q1	$168K	Sell	169 -1	-0.6%	-$975	0.1%	152
2025 Q4	$147K	Hold	170	–	–	0.08%	168
2025 Q3	$157K	Sell	170 -2	-1%	-$1.92K	0.1%	124
2025 Q2	$170K	Buy	172 +5	+3%	+$4.97K	0.11%	120
2025 Q1	$158K	Sell	167 -28	-14%	-$27.3K	0.12%	120
2024 Q4	$179K	Buy	195 +4	+2%	+$3.71K	0.13%	114
2024 Q3	$169K	Buy	191 +2	+1%	+$1.74K	0.12%	124
2024 Q2	$161K	Buy	+189	New	+$147K	0.11%	122
2024 Q1	–	Sell	-197	Closed	-$141K	–	138
2023 Q4	$131K	Hold	197	–	–	0.1%	131
2023 Q3	$111K	Sell	197 -25	-11%	-$13.8K	0.09%	134
2023 Q2	$120K	Hold	222	–	–	0.08%	178
2023 Q1	$110K	Buy	222 +32	+17%	+$15.7K	0.08%	173
2022 Q4	$86.7K	Buy	+190	New	+$92.8K	0.06%	184

Other funds holding COST

Assenagon Asset Management Senningerberg, Luxembourg $80.2B AUM 50.57% 1-Year Est. Return

Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return

Emerald Advisors Bellevue, Washington $796M AUM 2.51% 1-Year Est. Return

PTC

Provident Trust Company Waukesha, Wisconsin $4.77B AUM 29.31% 1-Year Est. Return

Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return

New York State Teachers Retirement System (NYSTRS) Albany, New York $54.2B AUM 43.77% 1-Year Est. Return

TWC

TD Waterhouse Canada Toronto, Ontario, Canada $38B AUM 39.14% 1-Year Est. Return

KeyBank National Association Cleveland, Ohio $30.4B AUM 27.51% 1-Year Est. Return

Ninety One (UK) London, United Kingdom $44.7B AUM 17.24% 1-Year Est. Return

Mirae Asset Global Investments Seoul, South Korea $67.7B AUM 51.91% 1-Year Est. Return

Byrne Asset Management's COST Position: Q2 2026 in Review

Byrne Asset Management reduced its Costco (COST) stake by 33% in Q2 2026, selling an estimated $54.8K and leaving 114 shares worth $107K. The position accounts for 0.06% of the portfolio, ranked #237.

Byrne Asset Management first reported a position in COST in Q4 2022 and has held it in 14 quarters since. The position peaked at $179K in Q4 2024. 1,717 funds tracked by Wall St. Rank hold COST as of Q2 2026.

Byrne Asset Management held 114 shares of Costco worth $107K as of Q2 2026.
Byrne Asset Management sold 55 Costco shares in Q2 2026, an estimated $54.8K.
Costco made up 0.06% of Byrne Asset Management's portfolio in Q2 2026, its #237 holding.
Byrne Asset Management first reported a position in Costco in Q4 2022 and has held it in 14 quarters since.
Byrne Asset Management's Costco position peaked at $179K in Q4 2024.
1,717 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Byrne Asset Management's 13F filing for Q2 2026, filed 7 Jul 2026.