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Woodline Partners’s Costco COST Stock Holding History

Woodline Partners’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 		$133M Buy
133,545
+57,930
+77% +$56.5M 0.5% 30
2025
Q4 		$65.2M Buy
75,615
+17,005
+29% +$15.4M 0.25% 91
2025
Q3 		$54.3M Buy
58,610
+10,617
+22% +$10.2M 0.26% 95
2025
Q2 		$47.5M Buy
47,993
+10,491
+28% +$10.4M 0.25% 105
2025
Q1 		$35.5M Buy
37,502
+10,894
+41% +$10.6M 0.23% 136
2024
Q4 		$24.4M Buy
+26,608
New +$24.7M 0.16% 178

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

Woodline Partners's COST Position: Q1 2026 in Review

Woodline Partners increased its Costco (COST) stake by 77% in Q1 2026, buying an estimated $56.5M and bringing the position to 133,545 shares worth $133M. The position accounts for 0.5% of the portfolio, ranked #30.

Woodline Partners first reported a position in COST in Q4 2024 and has held it in 6 quarters since. 4,237 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Woodline Partners held 133,545 shares of Costco worth $133M as of Q1 2026.
  • Woodline Partners bought 57,930 Costco shares in Q1 2026, an estimated $56.5M.
  • Costco made up 0.5% of Woodline Partners's portfolio in Q1 2026, its #30 holding.
  • Woodline Partners first reported a position in Costco in Q4 2024 and has held it in 6 quarters since.
  • 4,237 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Woodline Partners's 13F filing for Q1 2026, filed 15 May 2026.