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Boston Common Asset Management’s Costco COST Stock Holding History

Boston Common Asset 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
Q2 		$10.7M Sell
11,461
-1,266
-10% -$1.26M 0.64% 46
2026
Q1 		$12.7M Sell
12,727
-528
-4% -$515K 0.82% 37
2025
Q4 		$11.4M Sell
13,255
-177
-1% -$160K 0.69% 41
2025
Q3 		$12.4M Sell
13,432
-244
-2% -$234K 0.35% 101
2025
Q2 		$13.5M Sell
13,676
-488
-3% -$485K 0.38% 96
2025
Q1 		$13.4M Sell
14,164
-254
-2% -$248K 0.41% 91
2024
Q4 		$13.2M Sell
14,418
-994
-6% -$922K 0.38% 102
2024
Q3 		$13.7M Sell
15,412
-6,060
-28% -$5.26M 0.36% 105
2024
Q2 		$18.3M Buy
21,472
+5,556
+35% +$4.34M 0.47% 81
2024
Q1 		$11.7M Sell
15,916
-2,965
-16% -$2.12M 0.28% 124
2023
Q4 		$12.5M Sell
18,881
-902
-5% -$535K 0.28% 122
2023
Q3 		$11.2M Sell
19,783
-26
-0.1% -$14.4K 0.27% 131
2023
Q2 		$10.7M Buy
19,809
+2,477
+14% +$1.25M 0.23% 139
2023
Q1 		$8.61M Buy
17,332
+71
+0.4% +$34.8K 0.18% 162
2022
Q4 		$7.88M Buy
17,261
+60
+0.3% +$29.3K 0.38% 89
2022
Q3 		$8.12M Buy
17,201
+223
+1% +$116K 0.43% 78
2022
Q2 		$8.14M Buy
16,978
+16,183
+2,036% +$8.21M 0.41% 81
2022
Q1 		$458K Buy
+795
New +$417K 0.02% 221
2021
Q2 		– Sell
-850
Closed -$300K – 257
2021
Q1 		$300K Sell
850
-5
-0.6% -$1.74K 0.02% 227
2020
Q4 		$322K Sell
855
-422
-33% -$158K 0.02% 217
2020
Q3 		$453K Sell
1,277
-155
-11% -$52.1K 0.04% 191
2020
Q2 		$434K Sell
1,432
-150
-9% -$45.6K 0.05% 191
2020
Q1 		$451K Sell
1,582
-5,935
-79% -$1.8M 0.06% 173
2019
Q4 		$2.21M Sell
7,517
-13,685
-65% -$4.07M 0.26% 87
2019
Q3 		$6.11M Sell
21,202
-5,697
-21% -$1.6M 0.75% 56
2019
Q2 		$7.11M Hold
26,899
– – 0.89% 38
2019
Q1 		$6.51M Sell
26,899
-857
-3% -$187K 0.85% 41
2018
Q4 		$5.65M Sell
27,756
-340
-1% -$75.9K 0.82% 42
2018
Q3 		$6.6M Sell
28,096
-3,610
-11% -$813K 0.82% 44
2018
Q2 		$6.63M Sell
31,706
-1,721
-5% -$340K 0.82% 47
2018
Q1 		$6.3M Buy
33,427
+88
+0.3% +$16.6K 0.74% 54
2017
Q4 		$6.21M Buy
33,339
+1,033
+3% +$178K 0.74% 55
2017
Q3 		$5.31M Buy
32,306
+335
+1% +$52.6K 0.66% 62
2017
Q2 		$5.11M Buy
31,971
+8,767
+38% +$1.51M 0.67% 61
2017
Q1 		$3.89M Sell
23,204
-282
-1% -$47.3K 0.53% 76
2016
Q4 		$3.76M Buy
23,486
+36
+0.2% +$5.5K 0.55% 72
2016
Q3 		$3.58M Buy
23,450
+55
+0.2% +$8.89K 0.19% 137
2016
Q2 		$3.67M Sell
23,395
-438
-2% -$66.3K 0.21% 135
2016
Q1 		$3.76M Sell
23,833
-460
-2% -$69.7K 0.21% 133
2015
Q4 		$3.92M Sell
24,293
-2,021
-8% -$319K 0.22% 130
2015
Q3 		$3.8M Sell
26,314
-405
-2% -$57.8K 0.23% 128
2015
Q2 		$3.61M Sell
26,719
-1,225
-4% -$176K 0.19% 143
2015
Q1 		$4.23M Buy
27,944
+160
+0.6% +$23.5K 0.23% 134
2014
Q4 		$3.94M Sell
27,784
-287
-1% -$39K 0.22% 138
2014
Q3 		$3.52M Buy
28,071
+180
+0.6% +$21.8K 0.2% 148
2014
Q2 		$3.21M Buy
27,891
+173
+0.6% +$19.8K 0.18% 148
2014
Q1 		$3.1M Sell
27,718
-57
-0.2% -$6.52K 0.18% 151
2013
Q4 		$3.31M Sell
27,775
-5,655
-17% -$676K 0.18% 144
2013
Q3 		$3.85M Sell
33,430
-1,268
-4% -$146K 0.22% 141
2013
Q2 		$3.84M Buy
+34,698
New +$3.79M 0.24% 138

Other funds holding COST

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
EA
Emerald Advisors Bellevue, Washington $796M AUM 2.51% 1-Year Est. Return
Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 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
Ninety One (UK)
Ninety One (UK) London, United Kingdom $44.7B AUM 17.24% 1-Year Est. Return
Mirae Asset Global Investments
Mirae Asset Global Investments Seoul, South Korea $67.7B AUM 51.91% 1-Year Est. Return
RG
Rathbones Group Liverpool, United Kingdom $27.1B AUM 20.2% 1-Year Est. Return
SP
Sarasin & Partners London, United Kingdom $8.54B AUM 9.6% 1-Year Est. Return
CAM
Congress Asset Management Boston, Massachusetts $16.3B AUM 42.69% 1-Year Est. Return

Boston Common Asset Management's COST Position: Q2 2026 in Review

Boston Common Asset Management reduced its Costco (COST) stake by 9.9% in Q2 2026, selling an estimated $1.26M and leaving 11,461 shares worth $10.7M. The position accounts for 0.64% of the portfolio, ranked #46.

Boston Common Asset Management first reported a position in COST in Q2 2013 and has held it in 50 quarters since. The position peaked at $18.3M in Q2 2024. 1,443 funds tracked by Wall St. Rank hold COST as of Q2 2026.

  • Boston Common Asset Management held 11,461 shares of Costco worth $10.7M as of Q2 2026.
  • Boston Common Asset Management sold 1,266 Costco shares in Q2 2026, an estimated $1.26M.
  • Costco made up 0.64% of Boston Common Asset Management's portfolio in Q2 2026, its #46 holding.
  • Boston Common Asset Management first reported a position in Costco in Q2 2013 and has held it in 50 quarters since.
  • Boston Common Asset Management's Costco position peaked at $18.3M in Q2 2024.
  • 1,443 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Boston Common Asset Management's 13F filing for Q2 2026, filed 21 Jul 2026.