Marshall Wace
COST icon

Marshall Wace’s Costco COST Stock Holding History

Marshall Wace’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 		$281K Sell
300
-300
-50% -$299K ﹤0.01% 2750
2026
Q1 		$598K Sell
600
-2,100
-78% -$2.05M ﹤0.01% 2370
2025
Q4 		$2.33M Sell
2,700
-200
-7% -$181K ﹤0.01% 1503
2025
Q3 		$2.68M Buy
+2,900
New +$2.78M ﹤0.01% 1475
2025
Q2 		– Sell
-300
Closed -$284K – 2771
2025
Q1 		$284K Buy
+300
New +$292K ﹤0.01% 2288
2024
Q3 		– Sell
-1,900
Closed -$1.61M – 2569
2024
Q2 		$1.61M Sell
1,900
-15,500
-89% -$12.1M ﹤0.01% 1464
2024
Q1 		$13.5M Buy
17,400
+8,700
+100% +$6.21M 0.02% 644
2023
Q4 		$5.74M Sell
8,700
-19,500
-69% -$11.6M 0.01% 865
2023
Q3 		$15.9M Buy
28,200
+10,400
+58% +$5.74M 0.03% 501
2023
Q2 		$9.58M Sell
17,800
-40,300
-69% -$20.4M 0.02% 746
2023
Q1 		$28.9M Sell
58,100
-22,300
-28% -$10.9M 0.06% 337
2022
Q4 		$36.7M Buy
80,400
+37,800
+89% +$18.5M 0.08% 270
2022
Q3 		$20.1M Buy
42,600
+13,700
+47% +$7.13M 0.04% 464
2022
Q2 		$13.9M Buy
28,900
+14,300
+98% +$7.25M 0.03% 660
2022
Q1 		$8.41M Buy
14,600
+2,800
+24% +$1.47M 0.02% 1000
2021
Q4 		$6.7M Buy
11,800
+2,100
+22% +$1.08M 0.01% 1156
2021
Q3 		$4.36M Sell
9,700
-1,000
-9% -$440K 0.02% 1015
2021
Q2 		$4.23M Buy
+10,700
New +$4.05M 0.02% 944

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

Marshall Wace's COST Position: Q2 2026 in Review

Marshall Wace increased its Costco (COST) stake by 345% in Q2 2026, buying an estimated $907M and bringing the position to 1,174,466 shares worth $1.1B. The position accounts for 0.87% of the portfolio, ranked #9.

Marshall Wace first reported a position in COST in Q1 2014 and has held it in 40 quarters since. 4,240 funds tracked by Wall St. Rank hold COST as of Q2 2026.

  • Marshall Wace held 1,174,466 shares of Costco worth $1.1B as of Q2 2026.
  • Marshall Wace bought 910,725 Costco shares in Q2 2026, an estimated $907M.
  • Costco made up 0.87% of Marshall Wace's portfolio in Q2 2026, its #9 holding.
  • Marshall Wace first reported a position in Costco in Q1 2014 and has held it in 40 quarters since.
  • 4,240 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.