Mitchell Sinkler & Starr
COST icon

Mitchell Sinkler & Starr’s Costco COST Stock Holding History

Mitchell Sinkler & Starr’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
Q3 		$1.78M Sell
1,951
-3
-0.2% -$2.8K 0.72% 39
2026
Q2 		$1.83M Sell
1,954
-23
-1% -$22.9K 0.76% 41
2026
Q1 		$1.97M Sell
1,977
-88
-4% -$85.8K 0.91% 37
2025
Q4 		$1.78M Sell
2,065
-15
-0.7% -$13.6K 0.8% 38
2025
Q3 		$1.93M Hold
2,080
– – 0.87% 36
2025
Q2 		$2.06M Buy
2,080
+40
+2% +$39.8K 0.99% 34
2025
Q1 		$1.93M Buy
2,040
+53
+3% +$51.7K 0.54% 49
2024
Q4 		$1.82M Sell
1,987
-665
-25% -$617K 0.49% 48
2024
Q3 		$2.04M Buy
2,652
+84
+3% +$72.9K 0.51% 46
2024
Q2 		$2.16M Buy
2,568
+242
+10% +$189K 0.56% 44
2024
Q1 		$1.7M Sell
2,326
-269
-10% -$192K 0.43% 53
2023
Q4 		$1.71M Buy
2,595
+65
+3% +$38.5K 0.31% 71
2023
Q3 		$1.43M Hold
2,530
– – 0.44% 48
2023
Q2 		$1.36M Buy
2,530
+50
+2% +$25.3K 0.39% 54
2023
Q1 		$1.23M Buy
2,480
+805
+48% +$395K 0.36% 57
2022
Q4 		$765K Buy
1,675
+250
+18% +$122K 0.25% 74
2022
Q3 		$673K Buy
1,425
+23
+2% +$12K 0.26% 68
2022
Q2 		$672K Buy
1,402
+31
+2% +$15.7K 0.25% 67
2022
Q1 		$789K Sell
1,371
-31
-2% -$16.3K 0.25% 68
2021
Q4 		$796K Hold
1,402
– – 0.24% 71
2021
Q3 		$630K Sell
1,402
-50
-3% -$22K 0.57% 57
2021
Q2 		$575K Hold
1,452
– – 0.52% 61
2021
Q1 		$512K Hold
1,452
– – 0.5% 65
2020
Q4 		$547K Buy
1,452
+270
+23% +$101K 0.52% 62
2020
Q3 		$420K Buy
1,182
+403
+52% +$135K 0.43% 66
2020
Q2 		$236K Buy
+779
New +$237K 0.27% 86

Other funds holding COST

Emerald Advisors
Emerald Advisors Bellevue, Washington $781M AUM 4.78% 1-Year Est. Return
Parnassus Investments
Parnassus Investments San Francisco, California $33.8B AUM 31.08% 1-Year Est. Return
Assenagon Asset Management
Assenagon Asset Management Senningerberg, Luxembourg $103B AUM 40.17% 1-Year Est. Return
New York State Teachers Retirement System (NYSTRS)
New York State Teachers Retirement System (NYSTRS) Albany, New York $52.9B AUM 36.03% 1-Year Est. Return
TD Waterhouse Canada
TD Waterhouse Canada Toronto, Ontario, Canada $38.4B AUM 30.28% 1-Year Est. Return
Cardano Risk Management
Cardano Risk Management Rotterdam, Netherlands $18.2B AUM 38.97% 1-Year Est. Return
Ninety One (UK)
Ninety One (UK) London, United Kingdom $45.5B AUM 15.2% 1-Year Est. Return
Sarasin & Partners
Sarasin & Partners London, United Kingdom $8.93B AUM 11.81% 1-Year Est. Return
Congress Asset Management
Congress Asset Management Boston, Massachusetts $15.4B AUM 30.39% 1-Year Est. Return
Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $83.2B AUM 35.34% 1-Year Est. Return

Mitchell Sinkler & Starr's COST Position: Q3 2026 in Review

Mitchell Sinkler & Starr reduced its Costco (COST) stake by 0.15% in Q3 2026, selling an estimated $2.8K and leaving 1,951 shares worth $1.78M. The position accounts for 0.72% of the portfolio, ranked #39.

Mitchell Sinkler & Starr first reported a position in COST in Q2 2020 and has held it in 26 quarters since. The position peaked at $2.16M in Q2 2024. 1,271 funds tracked by Wall St. Rank hold COST as of Q3 2026.

  • Mitchell Sinkler & Starr held 1,951 shares of Costco worth $1.78M as of Q3 2026.
  • Mitchell Sinkler & Starr sold 3 Costco shares in Q3 2026, an estimated $2.8K.
  • Costco made up 0.72% of Mitchell Sinkler & Starr's portfolio in Q3 2026, its #39 holding.
  • Mitchell Sinkler & Starr first reported a position in Costco in Q2 2020 and has held it in 26 quarters since.
  • Mitchell Sinkler & Starr's Costco position peaked at $2.16M in Q2 2024.
  • 1,271 funds tracked by Wall St. Rank held Costco as of Q3 2026.

Based on Mitchell Sinkler & Starr's 13F filing for Q3 2026, filed 13 Oct 2026.