BF
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Blankinship & Foster’s Costco COST Stock Holding History

Blankinship & Foster’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 		$649K Sell
651
-15
-2% -$14.6K 0.14% 41
2025
Q4 		$574K Sell
666
-5
-0.7% -$4.53K 0.12% 43
2025
Q3 		$621K Buy
671
+9
+1% +$8.63K 0.14% 40
2025
Q2 		$655K Sell
662
-62
-9% -$61.6K 0.15% 39
2025
Q1 		$685K Buy
724
+404
+126% +$394K 0.17% 37
2024
Q4 		$293K Sell
320
-3
-0.9% -$2.78K 0.07% 54
2024
Q3 		$286K Hold
323
– – 0.07% 54
2024
Q2 		$275K Buy
323
+3
+0.9% +$2.34K 0.07% 54
2024
Q1 		$234K Sell
320
-87
-21% -$62.1K 0.06% 60
2023
Q4 		$269K Buy
+407
New +$241K 0.08% 54

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

Blankinship & Foster's COST Position: Q1 2026 in Review

Blankinship & Foster reduced its Costco (COST) stake by 2.3% in Q1 2026, selling an estimated $14.6K and leaving 651 shares worth $649K. The position accounts for 0.14% of the portfolio, ranked #41.

Blankinship & Foster first reported a position in COST in Q4 2023 and has held it in 10 quarters since. The position peaked at $685K in Q1 2025. 4,239 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Blankinship & Foster held 651 shares of Costco worth $649K as of Q1 2026.
  • Blankinship & Foster sold 15 Costco shares in Q1 2026, an estimated $14.6K.
  • Costco made up 0.14% of Blankinship & Foster's portfolio in Q1 2026, its #41 holding.
  • Blankinship & Foster first reported a position in Costco in Q4 2023 and has held it in 10 quarters since.
  • Blankinship & Foster's Costco position peaked at $685K in Q1 2025.
  • 4,239 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Blankinship & Foster's 13F filing for Q1 2026, filed 17 Apr 2026.