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Lee Ainslie’s Costco COST Stock Holding History

Lee Ainslie’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
-2,894
Closed -$2.5M – 262
2025
Q4 		$2.5M Buy
+2,894
New +$2.62M 0.03% 123
2025
Q2 		– Sell
-11,415
Closed -$10.8M – 255
2025
Q1 		$10.8M Buy
11,415
+9,010
+375% +$8.78M 0.19% 59
2024
Q4 		$2.2M Buy
2,405
+2,130
+775% +$1.98M 0.04% 99
2024
Q3 		$244K Buy
+275
New +$239K ﹤0.01% 228
2024
Q2 		– Sell
-1,557
Closed -$1.14M – 314
2024
Q1 		$1.14M Buy
+1,557
New +$1.11M 0.02% 117
2023
Q3 		– Sell
-10,203
Closed -$5.49M – 353
2023
Q2 		$5.49M Buy
+10,203
New +$5.16M 0.12% 54
2022
Q3 		– Sell
-10,963
Closed -$5.25M – 350
2022
Q2 		$5.25M Buy
10,963
+2,462
+29% +$1.25M 0.13% 60
2022
Q1 		$4.89M Buy
+8,501
New +$4.46M 0.09% 73
2020
Q4 		– Sell
-76
Closed -$27K – 692
2020
Q3 		$27K Buy
+76
New +$25.5K ﹤0.01% 550
2020
Q2 		– Sell
-12,544
Closed -$3.58M – 589
2020
Q1 		$3.58M Sell
12,544
-73,700
-85% -$22.4M 0.08% 117
2019
Q4 		$25.3M Buy
86,244
+69,938
+429% +$20.8M 0.37% 36
2019
Q3 		$4.7M Buy
+16,306
New +$4.59M 0.07% 163
2016
Q1 		– Sell
-1,610
Closed -$260K – 139
2015
Q4 		$260K Sell
1,610
-150
-9% -$23.7K ﹤0.01% 103
2015
Q3 		$254K Hold
1,760
– – ﹤0.01% 91
2015
Q2 		$238K Hold
1,760
– – ﹤0.01% 116
2015
Q1 		$267K Buy
+1,760
New +$258K ﹤0.01% 80

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
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
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
DAM
Diamant Asset Management Ridgefield, Connecticut $147M AUM 25.76% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Lee Ainslie's COST Position: Q1 2026 in Review

Lee Ainslie sold out of Costco (COST) in Q1 2026, closing a stake of 2,894 shares — an estimated $2.5M sold.

Lee Ainslie first reported a position in COST in Q1 2015 and held it in 16 quarters. The position peaked at $25.3M in Q4 2019. 4,256 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Lee Ainslie reported no remaining Costco position as of Q1 2026 after selling out during the quarter.
  • Lee Ainslie sold 2,894 Costco shares in Q1 2026, an estimated $2.5M.
  • Lee Ainslie first reported a position in Costco in Q1 2015 and held it in 16 quarters.
  • Lee Ainslie's Costco position peaked at $25.3M in Q4 2019.
  • 4,256 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Maverick Capital's 13F filing for Q1 2026, filed 15 May 2026.