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Mason & Associates (California)’s Costco COST Stock Holding History

Mason & Associates (California)’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
Q2 		$949K Sell
1,014
-149
-13% -$148K 0.15% 73
2026
Q1 		$1.16M Sell
1,163
-24
-2% -$23.4K 0.22% 58
2025
Q4 		$1.02M Buy
1,187
+437
+58% +$396K 0.19% 61
2025
Q3 		$694K Buy
750
+13
+2% +$12.5K 0.14% 64
2025
Q2 		$729K Sell
737
-3
-0.4% -$2.98K 0.17% 61
2025
Q1 		$700K Buy
740
+17
+2% +$16.6K 0.17% 59
2024
Q4 		$663K Buy
723
+25
+4% +$23.2K 0.16% 64
2024
Q3 		$619K Buy
698
+136
+24% +$118K 0.15% 65
2024
Q2 		$478K Hold
562
– – 0.13% 69
2024
Q1 		$412K Buy
562
+1
+0.2% +$714 0.11% 70
2023
Q4 		$371K Sell
561
-17
-3% -$10.1K 0.11% 62
2023
Q3 		$326K Buy
578
+6
+1% +$3.31K 0.1% 64
2023
Q2 		$308K Hold
572
– – 0.09% 65
2023
Q1 		$284K Buy
572
+13
+2% +$6.38K 0.09% 67
2022
Q4 		$255K Buy
559
+1
+0.2% +$489 0.08% 66
2022
Q3 		$264K Hold
558
– – 0.09% 70
2022
Q2 		$267K Buy
558
+1
+0.2% +$507 0.09% 75
2022
Q1 		$321K Hold
557
– – 0.1% 84
2021
Q4 		$316K Buy
+557
New +$285K 0.1% 73

Other funds holding COST

Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
Assenagon Asset Management
Assenagon Asset Management Senningerberg, Luxembourg $80.2B AUM 50.57% 1-Year Est. Return
Swedbank
Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return
Parnassus Investments
Parnassus Investments San Francisco, California $37.4B AUM 35.42% 1-Year Est. Return
EA
Emerald Advisors Bellevue, Washington $796M AUM 2.51% 1-Year Est. Return
New York State Common Retirement Fund
New York State Common Retirement Fund Albany, New York $79.3B AUM 43.63% 1-Year Est. Return
PTC
Provident Trust Company Waukesha, Wisconsin $4.77B AUM 29.31% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return
Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return
Commonwealth Equity Services
Commonwealth Equity Services Waltham, Massachusetts $79.5B AUM 27.1% 1-Year Est. Return

Mason & Associates (California)'s COST Position: Q2 2026 in Review

Mason & Associates (California) reduced its Costco (COST) stake by 13% in Q2 2026, selling an estimated $148K and leaving 1,014 shares worth $949K. The position accounts for 0.15% of the portfolio, ranked #73.

Mason & Associates (California) first reported a position in COST in Q4 2021 and has held it in 19 quarters since. The position peaked at $1.16M in Q1 2026. 2,087 funds tracked by Wall St. Rank hold COST as of Q2 2026.

  • Mason & Associates (California) held 1,014 shares of Costco worth $949K as of Q2 2026.
  • Mason & Associates (California) sold 149 Costco shares in Q2 2026, an estimated $148K.
  • Costco made up 0.15% of Mason & Associates (California)'s portfolio in Q2 2026, its #73 holding.
  • Mason & Associates (California) first reported a position in Costco in Q4 2021 and has held it in 19 quarters since.
  • Mason & Associates (California)'s Costco position peaked at $1.16M in Q1 2026.
  • 2,087 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Mason & Associates (California)'s 13F filing for Q2 2026, filed 23 Jul 2026.