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Plato Investment Management’s Costco COST Stock Holding History

Plato Investment Management’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 		$12.5M Buy
12,533
+246
+2% +$240K 0.84% 15
2025
Q4 		$10.6M Hold
12,287
– – 0.7% 18
2025
Q3 		$11.3M Buy
12,287
+83
+0.7% +$79.6K 0.76% 17
2025
Q2 		$12M Buy
12,204
+43
+0.4% +$42.7K 0.9% 14
2025
Q1 		$11.6M Sell
12,161
-855
-7% -$834K 0.98% 13
2024
Q4 		$12M Sell
13,016
-86
-0.7% -$79.8K 0.88% 13
2024
Q3 		$11.6M Sell
13,102
-15
-0.1% -$13K 0.94% 15
2024
Q2 		$11.1M Buy
13,117
+536
+4% +$418K 1.04% 14
2024
Q1 		$9.22M Buy
12,581
+11,722
+1,365% +$8.37M 0.95% 16
2023
Q4 		$567K Buy
+859
New +$509K 0.7% 30

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

Plato Investment Management's COST Position: Q1 2026 in Review

Plato Investment Management increased its Costco (COST) stake by 2% in Q1 2026, buying an estimated $240K and bringing the position to 12,533 shares worth $12.5M. The position accounts for 0.84% of the portfolio, ranked #15.

Plato Investment Management first reported a position in COST in Q4 2023 and has held it in 10 quarters since. 4,236 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Plato Investment Management held 12,533 shares of Costco worth $12.5M as of Q1 2026.
  • Plato Investment Management bought 246 Costco shares in Q1 2026, an estimated $240K.
  • Costco made up 0.84% of Plato Investment Management's portfolio in Q1 2026, its #15 holding.
  • Plato Investment Management first reported a position in Costco in Q4 2023 and has held it in 10 quarters since.
  • 4,236 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Plato Investment Management's 13F filing for Q1 2026, filed 5 May 2026.