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Osterweis Capital Management’s Costco COST Stock Holding History

Osterweis Capital 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 		$453K Sell
455
-34
-7% -$33.1K 0.02% 111
2025
Q4 		$422K Sell
489
-19
-4% -$17.2K 0.02% 119
2025
Q3 		$470K Sell
508
-318
-38% -$305K 0.02% 116
2025
Q2 		$818K Buy
826
+294
+55% +$292K 0.04% 108
2025
Q1 		$503K Sell
532
-95
-15% -$92.6K 0.02% 107
2024
Q4 		$575K Hold
627
– – 0.03% 114
2024
Q3 		$556K Sell
627
-270
-30% -$234K 0.03% 113
2024
Q2 		$762K Sell
897
-6
-0.7% -$4.68K 0.04% 108
2024
Q1 		$662K Buy
903
+137
+18% +$97.8K 0.04% 104
2023
Q4 		$506K Sell
766
-4
-0.5% -$2.37K 0.03% 109
2023
Q3 		$435K Hold
770
– – 0.03% 112
2023
Q2 		$415K Sell
770
-130
-14% -$65.8K 0.03% 119
2023
Q1 		$447K Hold
900
– – 0.03% 117
2022
Q4 		$411K Sell
900
-32
-3% -$15.6K 0.03% 119
2022
Q3 		$440K Buy
932
+32
+4% +$16.6K 0.03% 115
2022
Q2 		$431K Sell
900
-60
-6% -$30.4K 0.03% 120
2022
Q1 		$553K Sell
960
-100
-9% -$52.5K 0.03% 122
2021
Q4 		$602K Hold
1,060
– – 0.03% 120
2021
Q3 		$476K Buy
1,060
+260
+33% +$114K 0.03% 120
2021
Q2 		$317K Buy
+800
New +$303K 0.02% 131

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 $147M AUM 25.76% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Osterweis Capital Management's COST Position: Q1 2026 in Review

Osterweis Capital Management reduced its Costco (COST) stake by 7% in Q1 2026, selling an estimated $33.1K and leaving 455 shares worth $453K. The position accounts for 0.02% of the portfolio, ranked #111.

Osterweis Capital Management first reported a position in COST in Q2 2021 and has held it in 20 quarters since. The position peaked at $818K in Q2 2025. 4,239 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Osterweis Capital Management held 455 shares of Costco worth $453K as of Q1 2026.
  • Osterweis Capital Management sold 34 Costco shares in Q1 2026, an estimated $33.1K.
  • Costco made up 0.02% of Osterweis Capital Management's portfolio in Q1 2026, its #111 holding.
  • Osterweis Capital Management first reported a position in Costco in Q2 2021 and has held it in 20 quarters since.
  • Osterweis Capital Management's Costco position peaked at $818K in Q2 2025.
  • 4,239 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Osterweis Capital Management's 13F filing for Q1 2026, filed 15 May 2026.