Birchbrook’s Costco COST Stock Holding History

Birchbrook’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	$421K	Hold	450	–	–	0.2%	64
2026 Q1	$448K	Sell	450 -5	-1%	-$4.87K	0.22%	56
2025 Q4	$392K	Hold	455	–	–	0.2%	59
2025 Q3	$421K	Hold	455	–	–	0.22%	57
2025 Q2	$450K	Sell	455 -1	-0.2%	-$994	0.24%	54
2025 Q1	$431K	Buy	456 +11	+2%	+$10.7K	0.24%	51
2024 Q4	$408K	Sell	445 -2	-0.4%	-$1.86K	0.23%	49
2024 Q3	$396K	Hold	447	–	–	0.22%	50
2024 Q2	$380K	Hold	447	–	–	0.23%	50
2024 Q1	$327K	Hold	447	–	–	0.19%	53
2023 Q4	$295K	Buy	+447	New	+$265K	0.19%	57

Other funds holding COST

Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return

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

Parnassus Investments San Francisco, California $37.4B AUM 35.42% 1-Year Est. Return

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

New York State Common Retirement Fund Albany, New York $79.3B AUM 43.63% 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

Commonwealth Equity Services Waltham, Massachusetts $79.5B AUM 27.1% 1-Year Est. Return

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

Birchbrook's COST Position: Q2 2026 in Review

Birchbrook held its Costco (COST) position steady in Q2 2026 at 450 shares worth $421K. The position accounts for 0.2% of the portfolio, ranked #64.

Birchbrook first reported a position in COST in Q4 2023 and has held it in 11 quarters since. The position peaked at $450K in Q2 2025. 1,869 funds tracked by Wall St. Rank hold COST as of Q2 2026.

Birchbrook held 450 shares of Costco worth $421K as of Q2 2026.
Birchbrook left its Costco share count unchanged in Q2 2026.
Costco made up 0.2% of Birchbrook's portfolio in Q2 2026, its #64 holding.
Birchbrook first reported a position in Costco in Q4 2023 and has held it in 11 quarters since.
Birchbrook's Costco position peaked at $450K in Q2 2025.
1,869 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Birchbrook's 13F filing for Q2 2026, filed 9 Jul 2026.