BlackRock
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BlackRock’s Costco COST Stock Holding History

BlackRock’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
2024
Q3 		– Sell
-21,000
Closed -$17.8M – 5239
2024
Q2 		$17.8M Buy
+21,000
New +$16.4M ﹤0.01% 3056
2017
Q4 		– Sell
-300,000
Closed -$49.3M – 4933
2017
Q3 		$49.3M Buy
+300,000
New +$47.1M ﹤0.01% 2300

Other funds holding COST

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
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

BlackRock's COST Position: Q2 2026 in Review

BlackRock reduced its Costco (COST) stake by 2.1% in Q2 2026, selling an estimated $742M and leaving 34,202,834 shares worth $32B. The position accounts for 0.48% of the portfolio, ranked #29.

BlackRock first reported a position in COST in Q2 2013 and has held it in 53 quarters since. The position peaked at $35.2B in Q2 2025. 4,247 funds tracked by Wall St. Rank hold COST as of Q2 2026.

  • BlackRock held 34,202,834 shares of Costco worth $32B as of Q2 2026.
  • BlackRock sold 744,206 Costco shares in Q2 2026, an estimated $742M.
  • Costco made up 0.48% of BlackRock's portfolio in Q2 2026, its #29 holding.
  • BlackRock first reported a position in Costco in Q2 2013 and has held it in 53 quarters since.
  • BlackRock's Costco position peaked at $35.2B in Q2 2025.
  • 4,247 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on BlackRock's 13F filing for Q2 2026, filed 7 Aug 2026.