PEAK6
COST icon

PEAK6’s Costco COST Stock Holding History

PEAK6’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 		$43.2M Sell
43,400
-19,800
-31% -$19.3M 0.1% 175
2025
Q4 		$54.5M Buy
63,200
+35,600
+129% +$32.3M 0.1% 163
2025
Q3 		$25.5M Sell
27,600
-28,300
-51% -$27.1M 0.04% 346
2025
Q2 		$55.3M Sell
55,900
-133,500
-70% -$133M 0.1% 167
2025
Q1 		$179M Sell
189,400
-52,100
-22% -$50.8M 0.4% 55
2024
Q4 		$221M Buy
+241,500
New +$224M 0.46% 40

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

PEAK6's COST Position: Q1 2026 in Review

PEAK6 increased its Costco (COST) stake by 355,267% in Q1 2026, buying an estimated $10.4M and bringing the position to 10,661 shares worth $10.6M. The position accounts for 0.02% of the portfolio, ranked #559.

PEAK6 first reported a position in COST in Q4 2024 and has held it in 5 quarters since. The position peaked at $11.5M in Q4 2024. 4,236 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • PEAK6 held 10,661 shares of Costco worth $10.6M as of Q1 2026.
  • PEAK6 bought 10,658 Costco shares in Q1 2026, an estimated $10.4M.
  • Costco made up 0.02% of PEAK6's portfolio in Q1 2026, its #559 holding.
  • PEAK6 first reported a position in Costco in Q4 2024 and has held it in 5 quarters since.
  • PEAK6's Costco position peaked at $11.5M in Q4 2024.
  • 4,236 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on PEAK6's 13F filing for Q1 2026, filed 14 May 2026.