Ostrum Asset Management’s Costco COST Stock Holding History

Ostrum 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	$2.1M	Buy	2,246 +353	+19%	+$352K	0.1%	154
2026 Q1	$1.89M	Sell	1,893 -1,585	-46%	-$1.54M	0.11%	151
2025 Q4	$3M	Sell	3,478 -874	-20%	-$792K	0.14%	113
2025 Q3	$4.03M	Buy	4,352 +126	+3%	+$121K	0.18%	94
2025 Q2	$4.18M	Sell	4,226 -494	-10%	-$491K	0.2%	92
2025 Q1	$4.46M	Buy	4,720 +1,633	+53%	+$1.59M	0.24%	72
2024 Q4	$2.83M	Sell	3,087 -200	-6%	-$186K	0.25%	118
2024 Q3	$2.91M	Sell	3,287 -1,345	-29%	-$1.17M	0.24%	135
2024 Q2	$3.94M	Buy	4,632 +1,114	+32%	+$869K	0.34%	67
2024 Q1	$2.58M	Buy	3,518 +142	+4%	+$101K	0.2%	171
2023 Q4	$2.23M	Sell	3,376 -492	-13%	-$292K	0.19%	174
2023 Q3	$2.19M	Sell	3,868 -3,463	-47%	-$1.91M	0.2%	166
2023 Q2	$3.95M	Sell	7,331 -68	-0.9%	-$34.4K	0.33%	81
2023 Q1	$3.68M	Buy	+7,399	New	+$3.63M	0.32%	90
2020 Q3	–	Sell	-6,300	Closed	-$1.91M	–	59
2020 Q2	$1.91M	Hold	6,300	–	–	1.14%	23
2020 Q1	$1.8M	Sell	6,300 -4,700	-43%	-$1.43M	1.24%	19
2019 Q4	$3.23M	Hold	11,000	–	–	1.54%	13
2019 Q3	$3.17M	Buy	+11,000	New	+$3.1M	1.59%	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

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

Ostrum Asset Management increased its Costco (COST) stake by 19% in Q2 2026, buying an estimated $352K and bringing the position to 2,246 shares worth $2.1M. The position accounts for 0.1% of the portfolio, ranked #154.

Ostrum Asset Management first reported a position in COST in Q3 2019 and has held it in 18 quarters since. The position peaked at $4.46M in Q1 2025. 4,238 funds tracked by Wall St. Rank hold COST as of Q2 2026.

Ostrum Asset Management held 2,246 shares of Costco worth $2.1M as of Q2 2026.
Ostrum Asset Management bought 353 Costco shares in Q2 2026, an estimated $352K.
Costco made up 0.1% of Ostrum Asset Management's portfolio in Q2 2026, its #154 holding.
Ostrum Asset Management first reported a position in Costco in Q3 2019 and has held it in 18 quarters since.
Ostrum Asset Management's Costco position peaked at $4.46M in Q1 2025.
4,238 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Ostrum Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.