Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionTd Asset Management Inc
Latest Disclosed Ownership937,230 shares
Latest Disclosed Value $ 933,884,089
Td Asset Management Inc reports 24.58% increase in ownership of COST / Costco Wholesale Corporation

On May 11, 2026 - Td Asset Management Inc filed a 13F-HR form disclosing ownership of 937,230 shares of Costco Wholesale Corporation (MX:COST) valued at $933,884,089 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 752,300 shares of Costco Wholesale Corporation. This represents a change in shares of 24.58% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 937,230 184,930 24.58 933,884 43.95 0.4051
2026-02-10 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 752,300 -176,198 -18.98 648,738 -24.52 0.5219
2025-11-10 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 928,498 -163,800 -15.00 859,446 -20.52 0.6980
2025-07-28 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 1,092,298 -37,048 -3.28 1,081,309 1.24 0.9229
2025-05-07 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 1,129,346 -68,846 -5.75 1,068,113 -2.71 0.9831
2025-02-11 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 1,198,192 6,121 0.51 1,097,867 3.99 0.9713
2024-11-01 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 1,192,071 -44,131 -3.57 1,055,722 0.47 0.9317
2024-08-02 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 1,236,202 -36,474 -2.87 1,050,759 12.69 0.9799
2024-05-08 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 1,272,676 -6,148 -0.48 932,401 10.46 0.8674
2024-02-12 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 1,278,824 316,426 32.88 844,126 55.25 0.8300
2023-10-27 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 962,398 75,040 8.46 543,716 13.81 0.6587
2023-08-09 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 887,358 20,445 2.36 477,736 10.91 0.5441
2023-05-10 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 866,913 36,711 4.42 430,743 13.66 0.5199
2023-02-07 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 830,202 -55,973 -6.32 378,987 -10.71 0.4677
2022-11-07 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 886,175 -4,855 -0.54 424,460 -0.61 0.5315
2022-08-04 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 891,030 854,560 2,343.19 427,053 1,933.49 0.4948
2022-05-10 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 36,470 -836,891 -95.82 21,001 -95.76 0.0124
2022-05-10 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 896,984 516,528
2022-02-10 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 873,361 39,693 4.76 495,807 32.35 0.4152
2021-11-09 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 833,668 15,860 1.94 374,609 6.60 0.3889
2021-08-11 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 817,808 87,138 11.93 351,429 36.45 0.3568
2021-05-14 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 730,670 39,372 5.70 257,547 -1.12 0.2879
2021-02-16 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 691,298 33,673 5.12 260,468 11.57 0.3163
2020-11-10 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 657,625 29,399 4.68 233,457 22.56 0.3239
2020-08-13 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 628,226 -44,090 -6.56 190,484 -0.63 0.2710
2020-05-15 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 672,316 -132,927 -16.51 191,698 -19.00 0.3244
2020-02-11 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 805,243 9,075 1.14 236,677 3.18 0.3436
2019-11-07 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 796,168 -313,359 -28.24 229,384 -21.77 0.3506
2019-08-01 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 1,109,527 -3,462 -0.31 293,204 8.80 0.4390
2019-05-08 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 1,112,989 42,870 4.01 269,499 23.63 0.4114
2019-02-01 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 1,070,119 -2,141 -0.20 217,994 -13.44 0.3792
2018-11-01 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 1,072,260 -8,610 -0.80 251,853 11.50 0.3726
2018-07-31 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 1,080,870 -26,301 -2.38 225,880 8.27 0.3442
2018-05-11 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 1,107,171 711,319 179.69 208,625 183.17 0.3194
2018-02-02 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 395,852 -9,908 -2.44 73,676 10.52 0.1073
2017-11-09 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 405,760 2,093 0.52 66,662 3.26 0.0999
2017-08-01 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 403,667 -15,145 -3.62 64,558 -8.08 0.1017
2017-05-05 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 418,812 11,096 2.72 70,231 7.59 0.1120
2017-02-08 2016-12-31 13F COSTCO WHSL CORP COM 22160K105 407,716 3,378 0.84 65,279 5.86 0.1101
2016-11-02 2016-09-30 13F COSTCO WHSL CORP COM 22160K105 404,338 -20,095 -4.73 61,665 -7.48 0.1067
2016-08-04 2016-06-30 13F COSTCO WHSL CORP COM 22160K105 424,433 7,906 1.90 66,653 1.55 0.1209
2016-05-05 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 416,527 -28,620 -6.43 65,636 -8.70 0.1227
2016-02-04 2015-12-31 13F COSTCO WHSL CORP COM 22160K105 445,147 18,198 4.26 71,892 16.47 0.1426
2015-11-12 2015-09-30 13F COSTCO WHSL CORP COM 22160K105 426,949 148,255 53.20 61,724 63.98 0.1215
2015-08-11 2015-06-30 13F COSTCO WHSL CORP COM 22160K105 278,694 -32,408 -10.42 37,641 -20.14 0.0672
2015-04-28 2015-03-31 13F COSTCO WHSL CORP COM 22160K105 311,102 311,102 0.00 47,131 0.0851
2015-01-30 2014-12-31 13F COSTCO WHSL CORP COM 22160K105 0 -305,642 -100.00 0 -100.00
2014-11-06 2014-09-30 13F COSTCO WHSL CORP COM 22160K105 305,642 16,355 5.65 38,303 14.98 0.0661
2014-08-12 2014-06-30 13F COSTCO WHSL CORP COM 22160K105 289,287 5,220 1.84 33,314 5.01 0.0568
2014-05-09 2014-03-31 13F COSTCO WHSL CORP COM 22160K105 284,067 1,271 0.45 31,725 -5.74 0.0577
2014-02-07 2013-12-31 13F COSTCO WHSL CORP COM 22160K105 282,796 -47,160 -14.29 33,656 -11.40 0.0629
2013-11-08 2013-09-30 13F COSTCO WHSL CORP COM 22160K105 329,956 -6,924 -2.06 37,985 1.98 0.0755
2013-07-24 2013-06-30 13F COSTCO WHSL CORP COM 22160K105 336,880 336,880 37,249 0.0799
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.