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Great Diamond Partners’s Costco COST Stock Holding History

Great Diamond 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
Q2 		$453K Buy
484
+23
+5% +$22.9K 0.08% 175
2026
Q1 		$459K Buy
461
+6
+1% +$5.85K 0.09% 163
2025
Q4 		$392K Sell
455
-32
-7% -$29K 0.08% 172
2025
Q3 		$451K Sell
487
-26
-5% -$24.9K 0.09% 159
2025
Q2 		$508K Buy
513
+173
+51% +$172K 0.11% 148
2025
Q1 		$322K Sell
340
-6
-2% -$5.85K 0.09% 136
2024
Q4 		$317K Sell
346
-33
-9% -$30.6K 0.08% 136
2024
Q3 		$336K Sell
379
-132
-26% -$115K 0.09% 139
2024
Q2 		$434K Sell
511
-66
-11% -$51.5K 0.1% 138
2024
Q1 		$423K Buy
577
+7
+1% +$5K 0.1% 145
2023
Q4 		$376K Sell
570
-183
-24% -$108K 0.09% 154
2023
Q3 		$426K Buy
753
+9
+1% +$4.97K 0.12% 140
2023
Q2 		$401K Sell
744
-32
-4% -$16.2K 0.11% 146
2023
Q1 		$386K Buy
776
+6
+0.8% +$2.94K 0.11% 139
2022
Q4 		$352K Sell
770
-20
-3% -$9.77K 0.11% 144
2022
Q3 		$373K Sell
790
-3
-0.4% -$1.56K 0.13% 139
2022
Q2 		$380K Sell
793
-16
-2% -$8.12K 0.13% 139
2022
Q1 		$466K Buy
809
+66
+9% +$34.6K 0.13% 133
2021
Q4 		$421K Buy
743
+21
+3% +$10.8K 0.11% 149
2021
Q3 		$324K Sell
722
-7
-1% -$3.08K 0.09% 160
2021
Q2 		$288K Sell
729
-11
-1% -$4.16K 0.08% 161
2021
Q1 		$260K Sell
740
-233
-24% -$81.1K 0.08% 168
2020
Q4 		$366K Buy
973
+23
+2% +$8.59K 0.12% 120
2020
Q3 		$337K Buy
950
+12
+1% +$4.03K 0.12% 114
2020
Q2 		$284K Buy
938
+35
+4% +$10.6K 0.12% 116
2020
Q1 		$257K Sell
903
-127
-12% -$38.5K 0.13% 106
2019
Q4 		$302K Buy
+1,030
New +$306K 0.11% 115

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
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
New York State Teachers Retirement System (NYSTRS)
New York State Teachers Retirement System (NYSTRS) Albany, New York $54.2B AUM 43.77% 1-Year Est. Return

Great Diamond Partners's COST Position: Q2 2026 in Review

Great Diamond Partners increased its Costco (COST) stake by 5% in Q2 2026, buying an estimated $22.9K and bringing the position to 484 shares worth $453K. The position accounts for 0.08% of the portfolio, ranked #175.

Great Diamond Partners first reported a position in COST in Q4 2019 and has held it in 27 quarters since. The position peaked at $508K in Q2 2025. 1,880 funds tracked by Wall St. Rank hold COST as of Q2 2026.

  • Great Diamond Partners held 484 shares of Costco worth $453K as of Q2 2026.
  • Great Diamond Partners bought 23 Costco shares in Q2 2026, an estimated $22.9K.
  • Costco made up 0.08% of Great Diamond Partners's portfolio in Q2 2026, its #175 holding.
  • Great Diamond Partners first reported a position in Costco in Q4 2019 and has held it in 27 quarters since.
  • Great Diamond Partners's Costco position peaked at $508K in Q2 2025.
  • 1,880 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Great Diamond Partners's 13F filing for Q2 2026, filed 17 Jul 2026.