Robeco Institutional Asset Management
COST icon

Robeco Institutional Asset Management’s Costco COST Stock Holding History

Robeco Institutional 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 		$324M Buy
346,795
+55,789
+19% +$55.6M 0.4% 50
2026
Q1 		$290M Buy
291,006
+21,504
+8% +$21M 0.41% 51
2025
Q4 		$232M Sell
269,502
-108,852
-29% -$98.6M 0.33% 67
2025
Q3 		$350M Sell
378,354
-58,354
-13% -$55.9M 0.51% 32
2025
Q2 		$432M Sell
436,708
-16,631
-4% -$16.5M 0.7% 20
2025
Q1 		$429M Sell
453,339
-133,245
-23% -$130M 0.83% 16
2024
Q4 		$537M Sell
586,584
-40,764
-6% -$37.8M 1.02% 15
2024
Q3 		$556M Sell
627,348
-64,346
-9% -$55.8M 1.1% 13
2024
Q2 		$588M Sell
691,694
-130,750
-16% -$102M 1.27% 10
2024
Q1 		$603M Buy
822,444
+195,088
+31% +$139M 1.31% 9
2023
Q4 		$414M Sell
627,356
-37,175
-6% -$22M 1% 10
2023
Q3 		$375M Buy
664,531
+1,066
+0.2% +$588K 1% 11
2023
Q2 		$357M Buy
663,465
+82,302
+14% +$41.6M 0.94% 14
2023
Q1 		$289M Sell
581,163
-119,304
-17% -$58.5M 0.79% 21
2022
Q4 		$320M Sell
700,467
-210,944
-23% -$103M 0.92% 12
2022
Q3 		$430M Buy
911,411
+107,250
+13% +$55.8M 1.39% 8
2022
Q2 		$385M Buy
804,161
+8,970
+1% +$4.55M 1.2% 10
2022
Q1 		$458M Buy
795,191
+35,938
+5% +$18.9M 1.08% 9
2021
Q4 		$431M Buy
759,253
+26,773
+4% +$13.7M 0.92% 15
2021
Q3 		$329M Buy
732,480
+25,540
+4% +$11.2M 0.73% 29
2021
Q2 		$280M Buy
706,940
+343
+0% +$130K 0.62% 30
2021
Q1 		$249M Buy
706,597
+57,105
+9% +$19.9M 0.61% 32
2020
Q4 		$245M Buy
649,492
+113,754
+21% +$42.5M 0.64% 29
2020
Q3 		$190M Sell
535,738
-30,087
-5% -$10.1M 0.59% 33
2020
Q2 		$172M Buy
565,825
+97,403
+21% +$29.6M 0.58% 30
2020
Q1 		$134M Buy
468,422
+7,014
+2% +$2.13M 0.54% 33
2019
Q4 		$136M Buy
461,408
+75,047
+19% +$22.3M 0.43% 48
2019
Q3 		$111M Buy
386,361
+13,425
+4% +$3.78M 0.39% 55
2019
Q2 		$98.6M Sell
372,936
-4,515
-1% -$1.13M 0.35% 64
2019
Q1 		$91.4M Buy
377,451
+3,465
+0.9% +$758K 0.34% 67
2018
Q4 		$76.2M Buy
373,986
+194,278
+108% +$43.4M 0.34% 71
2018
Q3 		$42.2M Buy
179,708
+63,781
+55% +$14.4M 0.17% 164
2018
Q2 		$24.2M Sell
115,927
-1,533
-1% -$303K 0.11% 240
2018
Q1 		$22.1M Buy
117,460
+15,714
+15% +$2.96M 0.1% 244
2017
Q4 		$18.9M Buy
101,746
+73,158
+256% +$12.6M 0.1% 248
2017
Q3 		$4.7M Buy
28,588
+5,730
+25% +$900K 0.03% 442
2017
Q2 		$3.65M Sell
22,858
-602
-3% -$104K 0.02% 480
2017
Q1 		$3.94M Buy
23,460
+18,135
+341% +$3.04M 0.03% 470
2016
Q4 		$852K Sell
5,325
-15,735
-75% -$2.4M 0.01% 600
2016
Q3 		$3.21M Sell
21,060
-1,799
-8% -$291K 0.02% 453
2016
Q2 		$3.59M Hold
22,859
– – 0.03% 421
2016
Q1 		$3.6M Hold
22,859
– – 0.03% 403
2015
Q4 		$3.69M Buy
22,859
+3,482
+18% +$550K 0.03% 385
2015
Q3 		$2.8M Sell
19,377
-16,355
-46% -$2.33M 0.02% 425
2015
Q2 		$4.82M Sell
35,732
-1,906
-5% -$274K 0.04% 355
2015
Q1 		$5.7M Buy
37,638
+9,674
+35% +$1.42M 0.04% 330
2014
Q4 		$3.96M Sell
27,964
-35,471
-56% -$4.82M 0.03% 361
2014
Q3 		$7.95M Sell
63,435
-1,365
-2% -$165K 0.06% 281
2014
Q2 		$7.46M Buy
64,800
+7,404
+13% +$849K 0.05% 273
2014
Q1 		$6.41M Buy
57,396
+6,942
+14% +$794K 0.05% 279
2013
Q4 		$6M Sell
50,454
-489
-1% -$58.5K 0.05% 266
2013
Q3 		$5.86M Sell
50,943
-3,377
-6% -$390K 0.06% 260
2013
Q2 		$6.01M Buy
+54,320
New +$5.94M 0.06% 254

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
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
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
CRM
Cardano Risk Management Rotterdam, Netherlands $13B AUM 49.44% 1-Year Est. Return
ATO
Alecta Tjanstepension Omsesidigt Stockholm, Sweden $23.8B AUM 34.25% 1-Year Est. Return
SC
Steginsky Capital Port Washington, New York $666M AUM 34.57% 1-Year Est. Return

Robeco Institutional Asset Management's COST Position: Q2 2026 in Review

Robeco Institutional Asset Management increased its Costco (COST) stake by 19% in Q2 2026, buying an estimated $55.6M and bringing the position to 346,795 shares worth $324M. The position accounts for 0.4% of the portfolio, ranked #50.

Robeco Institutional Asset Management first reported a position in COST in Q2 2013 and has held it in 53 quarters since. The position peaked at $603M in Q1 2024. 1,151 funds tracked by Wall St. Rank hold COST as of Q2 2026.

  • Robeco Institutional Asset Management held 346,795 shares of Costco worth $324M as of Q2 2026.
  • Robeco Institutional Asset Management bought 55,789 Costco shares in Q2 2026, an estimated $55.6M.
  • Costco made up 0.4% of Robeco Institutional Asset Management's portfolio in Q2 2026, its #50 holding.
  • Robeco Institutional Asset Management first reported a position in Costco in Q2 2013 and has held it in 53 quarters since.
  • Robeco Institutional Asset Management's Costco position peaked at $603M in Q1 2024.
  • 1,151 funds tracked by Wall St. Rank held Costco as of Q2 2026.

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