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
Q1 		– Sell
-39,700
Closed -$34.2M – 3268
2025
Q4 		$34.2M Sell
39,700
-50,700
-56% -$45.9M 0.03% 456
2025
Q3 		$83.7M Buy
90,400
+78,500
+660% +$75.2M 0.08% 208
2025
Q2 		$11.8M Buy
+11,900
New +$11.8M 0.01% 786
2025
Q1 		– Sell
-300
Closed -$275K – 2690
2024
Q4 		$275K Sell
300
-3,100
-91% -$2.88M ﹤0.01% 2256
2024
Q3 		$3.01M Buy
3,400
+2,500
+278% +$2.17M ﹤0.01% 1213
2024
Q2 		$765K Sell
900
-23,100
-96% -$18M ﹤0.01% 1798
2024
Q1 		$18.7M Buy
24,000
+19,300
+411% +$13.8M 0.03% 533
2023
Q4 		$3.1M Sell
4,700
-31,300
-87% -$18.6M 0.01% 1067
2023
Q3 		$20.3M Sell
36,000
-29,400
-45% -$16.2M 0.04% 429
2023
Q2 		$35.2M Sell
65,400
-21,700
-25% -$11M 0.07% 299
2023
Q1 		$43.3M Sell
87,100
-36,800
-30% -$18M 0.09% 249
2022
Q4 		$56.6M Buy
123,900
+93,000
+301% +$45.4M 0.13% 177
2022
Q3 		$14.6M Buy
30,900
+12,100
+64% +$6.29M 0.03% 618
2022
Q2 		$9.02M Buy
18,800
+7,900
+72% +$4.01M 0.02% 936
2022
Q1 		$6.28M Sell
10,900
-4,800
-31% -$2.52M 0.01% 1205
2021
Q4 		$8.91M Buy
+15,700
New +$8.04M 0.02% 940
2021
Q3 		– Sell
-4,000
Closed -$1.58M – 3072
2021
Q2 		$1.58M Buy
+4,000
New +$1.51M 0.01% 1570

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.