Boston Partners
COST icon

Boston Partners’s Costco COST Stock Holding History

Boston Partners’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 		$343K Sell
367
-3
-0.8% -$2.99K ﹤0.01% 746
2026
Q1 		$369K Buy
370
+60
+19% +$58.5K ﹤0.01% 710
2025
Q4 		$267K Buy
310
+5
+2% +$4.53K ﹤0.01% 732
2025
Q3 		$282K Buy
+305
New +$292K ﹤0.01% 720

Other funds holding COST

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Boston Partners's COST Position: Q2 2026 in Review

Boston Partners reduced its Costco (COST) stake by 0.81% in Q2 2026, selling an estimated $2.99K and leaving 367 shares worth $343K. The position accounts for ﹤0.01% of the portfolio, ranked #746.

Boston Partners first reported a position in COST in Q3 2025 and has held it in 4 quarters since. The position peaked at $369K in Q1 2026. 4,247 funds tracked by Wall St. Rank hold COST as of Q2 2026.

  • Boston Partners held 367 shares of Costco worth $343K as of Q2 2026.
  • Boston Partners sold 3 Costco shares in Q2 2026, an estimated $2.99K.
  • Costco made up ﹤0.01% of Boston Partners's portfolio in Q2 2026, its #746 holding.
  • Boston Partners first reported a position in Costco in Q3 2025 and has held it in 4 quarters since.
  • Boston Partners's Costco position peaked at $369K in Q1 2026.
  • 4,247 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Boston Partners's 13F filing for Q2 2026, filed 4 Aug 2026.