Bank of Montreal
COST icon

Bank of Montreal’s Costco COST Stock Holding History

Bank of Montreal’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
Q1 		$1.37B Sell
1,369,928
-419,835
-23% -$409M 0.51% 41
2025
Q4 		$1.54B Sell
1,789,763
-91,162
-5% -$82.6M 0.53% 38
2025
Q3 		$1.74B Buy
1,880,925
+396,911
+27% +$380M 0.67% 31
2025
Q2 		$1.47B Sell
1,484,014
-121,255
-8% -$121M 0.69% 30
2025
Q1 		$1.52B Sell
1,605,269
-154,231
-9% -$150M 0.74% 29
2024
Q4 		$1.61B Sell
1,759,500
-114,055
-6% -$106M 0.75% 26
2024
Q3 		$1.66B Buy
1,873,555
+49,280
+3% +$42.8M 0.73% 28
2024
Q2 		$1.56B Sell
1,824,275
-17,638
-1% -$13.8M 0.45% 32
2024
Q1 		$1.35B Sell
1,841,913
-42,509
-2% -$30.3M 0.41% 34
2023
Q4 		$1.27B Buy
1,884,422
+166,546
+10% +$98.7M 0.39% 34
2023
Q3 		$961M Buy
1,717,876
+36,655
+2% +$20.2M 0.33% 41
2023
Q2 		$907M Buy
1,681,221
+73,174
+5% +$37M 0.31% 40
2023
Q1 		$800M Sell
1,608,047
-209,667
-12% -$103M 0.32% 42
2022
Q4 		$952M Buy
1,817,714
+146,194
+9% +$71.4M 0.41% 35
2022
Q3 		$976K Sell
1,671,520
-491,664
-23% -$256M 0.42% 35
2022
Q2 		$1.26M Buy
2,163,184
+610,466
+39% +$310M 0.59% 29
2022
Q1 		$895M Sell
1,552,718
-164,863
-10% -$86.5M 0.43% 50
2021
Q4 		$969M Sell
1,717,581
-279,817
-14% -$143M 0.51% 39
2021
Q3 		$904M Buy
1,997,398
+39,854
+2% +$17.5M 0.41% 44
2021
Q2 		$781M Buy
1,957,544
+292,513
+18% +$111M 0.39% 50
2021
Q1 		$601M Buy
1,665,031
+155,782
+10% +$54.2M 0.39% 48
2020
Q4 		$549M Buy
1,509,249
+145,084
+11% +$54.2M 0.36% 57
2020
Q3 		$489M Buy
1,364,165
+8,564
+0.6% +$2.88M 0.41% 50
2020
Q2 		$441M Buy
1,355,601
+134,681
+11% +$41M 0.4% 52
2020
Q1 		$356M Sell
1,220,920
-190,142
-13% -$57.7M 0.41% 54
2019
Q4 		$415M Buy
1,411,062
+52,364
+4% +$15.6M 0.31% 63
2019
Q3 		$391M Buy
1,358,698
+139,809
+11% +$39.3M 0.34% 60
2019
Q2 		$322M Buy
1,218,889
+30,192
+3% +$7.52M 0.27% 77
2019
Q1 		$288M Sell
1,188,697
-262,300
-18% -$57.4M 0.25% 81
2018
Q4 		$296M Buy
1,450,997
+141,471
+11% +$31.6M 0.28% 75
2018
Q3 		$308M Sell
1,309,526
-396,076
-23% -$89.2M 0.24% 86
2018
Q2 		$356M Buy
1,705,602
+134,814
+9% +$26.6M 0.29% 62
2018
Q1 		$296M Buy
1,570,788
+35,448
+2% +$6.69M 0.26% 73
2017
Q4 		$286M Buy
1,535,340
+107,255
+8% +$18.5M 0.25% 76
2017
Q3 		$235M Buy
1,428,085
+178,801
+14% +$28.1M 0.21% 92
2017
Q2 		$200M Buy
1,249,284
+349,328
+39% +$60.2M 0.19% 110
2017
Q1 		$151M Buy
899,956
+65,192
+8% +$10.9M 0.14% 139
2016
Q4 		$125M Sell
834,764
-81,652
-9% -$12.5M 0.13% 148
2016
Q3 		$140M Buy
916,416
+185,591
+25% +$30M 0.15% 131
2016
Q2 		$115M Sell
730,825
-13,415
-2% -$2.03M 0.13% 145
2016
Q1 		$117M Sell
744,240
-38,616
-5% -$5.85M 0.13% 125
2015
Q4 		$126M Buy
782,856
+134,973
+21% +$21.3M 0.15% 119
2015
Q3 		$93.7M Buy
647,883
+107,798
+20% +$15.4M 0.13% 142
2015
Q2 		$72.9M Sell
540,085
-63,431
-11% -$9.12M 0.09% 215
2015
Q1 		$91.4M Buy
603,516
+29,134
+5% +$4.27M 0.11% 183
2014
Q4 		$81.4M Sell
574,382
-117,557
-17% -$16M 0.09% 190
2014
Q3 		$86.7M Buy
691,939
+241,592
+54% +$29.2M 0.1% 185
2014
Q2 		$51.9M Buy
450,347
+159,063
+55% +$18.2M 0.06% 258
2014
Q1 		$32.5M Buy
291,284
+14,139
+5% +$1.62M 0.04% 304
2013
Q4 		$33M Buy
277,145
+5,796
+2% +$693K 0.05% 281
2013
Q3 		$31.3M Sell
271,349
-216
-0.1% -$24.9K 0.05% 259
2013
Q2 		$30M Buy
+271,565
New +$29.7M 0.05% 247

Other funds holding COST

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
DAM
Diamant Asset Management Ridgefield, Connecticut $147M AUM 25.76% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Bank of Montreal's COST Position: Q1 2026 in Review

Bank of Montreal reduced its Costco (COST) stake by 23% in Q1 2026, selling an estimated $409M and leaving 1,369,928 shares worth $1.37B. The position accounts for 0.51% of the portfolio, ranked #41.

Bank of Montreal first reported a position in COST in Q2 2013 and has held it in 52 quarters since. The position peaked at $1.74B in Q3 2025. 4,239 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Bank of Montreal held 1,369,928 shares of Costco worth $1.37B as of Q1 2026.
  • Bank of Montreal sold 419,835 Costco shares in Q1 2026, an estimated $409M.
  • Costco made up 0.51% of Bank of Montreal's portfolio in Q1 2026, its #41 holding.
  • Bank of Montreal first reported a position in Costco in Q2 2013 and has held it in 52 quarters since.
  • Bank of Montreal's Costco position peaked at $1.74B in Q3 2025.
  • 4,239 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Bank of Montreal's 13F filing for Q1 2026, filed 13 May 2026.