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Custom Index Systems’s Costco COST Stock Holding History

Custom Index Systems’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 		$1.48M Sell
1,484
-31
-2% -$30.2K 0.64% 34
2025
Q4 		$1.31M Sell
1,515
-513
-25% -$465K 0.58% 43
2025
Q3 		$1.88M Buy
2,028
+443
+28% +$425K 0.56% 44
2025
Q2 		$1.57M Buy
1,585
+182
+13% +$181K 0.75% 28
2025
Q1 		$1.33M Buy
1,403
+59
+4% +$57.5K 0.67% 28
2024
Q4 		$1.23M Buy
1,344
+34
+3% +$31.5K 0.66% 37
2024
Q3 		$1.16M Sell
1,310
-377
-22% -$327K 0.63% 38
2024
Q2 		$1.43M Buy
1,687
+320
+23% +$250K 0.82% 34
2024
Q1 		$1M Buy
1,367
+571
+72% +$408K 0.57% 40
2023
Q4 		$525K Buy
+796
New +$472K 0.32% 67

Other funds holding COST

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
DAM
Diamant Asset Management Ridgefield, Connecticut $137B AUM 18.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Custom Index Systems's COST Position: Q1 2026 in Review

Custom Index Systems reduced its Costco (COST) stake by 2% in Q1 2026, selling an estimated $30.2K and leaving 1,484 shares worth $1.48M. The position accounts for 0.64% of the portfolio, ranked #34.

Custom Index Systems first reported a position in COST in Q4 2023 and has held it in 10 quarters since. The position peaked at $1.88M in Q3 2025. 4,236 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Custom Index Systems held 1,484 shares of Costco worth $1.48M as of Q1 2026.
  • Custom Index Systems sold 31 Costco shares in Q1 2026, an estimated $30.2K.
  • Costco made up 0.64% of Custom Index Systems's portfolio in Q1 2026, its #34 holding.
  • Custom Index Systems first reported a position in Costco in Q4 2023 and has held it in 10 quarters since.
  • Custom Index Systems's Costco position peaked at $1.88M in Q3 2025.
  • 4,236 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Custom Index Systems's 13F filing for Q1 2026, filed 29 Apr 2026.