Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionCentral Bank & Trust Co
Latest Disclosed Ownership13,288 shares
Latest Disclosed Value $ 13,240,562
Central Bank & Trust Co reports 0.78% decrease in ownership of COST / Costco Wholesale Corporation

On April 7, 2026 - Central Bank & Trust Co filed a 13F-HR form disclosing ownership of 13,288 shares of Costco Wholesale Corporation (MX:COST) valued at $13,240,562 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 13,393 shares of Costco Wholesale Corporation. This represents a change in shares of -0.78% 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)
2026-04-07 2026-03-31 13F COSTCO WHOLESALE Equities 22160K105 13,288 -105 -0.78 13,241 14.64 2.0805
2026-01-09 2025-12-31 13F COSTCO WHOLESALE Equities 22160K105 13,393 -363 -2.64 11,549 -9.29 1.7858
2025-10-09 2025-09-30 13F COSTCO WHOLESALE Equities 22160K105 13,756 -462 -3.25 12,733 -9.54 2.0071
2025-07-09 2025-06-30 13F COSTCO WHOLESALE Equities 22160K105 14,218 -316 -2.17 14,075 2.39 2.3013
2025-04-14 2025-03-31 13F COSTCO WHOLESALE Equities 22160K105 14,534 -236 -1.60 13,746 1.57 2.2964
2025-01-16 2024-12-31 13F COSTCO WHOLESALE Equities 22160K105 14,770 -917 -5.85 13,533 -2.68 2.0485
2024-10-30 2024-09-30 13F COSTCO WHOLESALE Equities 22160K105 15,687 -1,357 -7.96 13,907 -4.00 1.9171
2024-07-19 2024-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 17,044 -526 -2.99 14,487 12.54 2.0143
2024-04-11 2024-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 17,570 -727 -3.97 12,872 6.58 1.8348
2024-01-09 2023-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 18,297 -164 -0.89 12,077 15.80 1.8718
2023-10-10 2023-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 18,461 -222 -1.19 10,429 3.69 1.8131
2023-07-13 2023-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 18,683 -521 -2.71 10,058 5.42 1.7047
2023-04-13 2023-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 19,204 -515 -2.61 9,542 6.00 1.6979
2023-01-18 2022-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 19,719 -820 -3.99 9,002 -7.21 1.6986
2022-10-20 2022-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 20,539 -38 -0.18 9,700 -1.64 2.0857
2022-07-22 2022-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 20,577 194 0.95 9,862 -15.98 2.0108
2022-04-18 2022-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 20,383 254 1.26 11,737 2.71 1.8733
2022-01-18 2021-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 20,129 -835 -3.98 11,427 21.31 1.7635
2021-10-19 2021-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 20,964 208 1.00 9,420 14.71 1.5482
2021-07-16 2021-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 20,756 -141 -0.67 8,212 11.50 1.3259
2021-04-20 2021-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 20,897 -315 -1.49 7,365 -7.85 1.2566
2021-01-12 2020-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 21,212 138 0.65 7,992 6.83 1.3806
2020-10-08 2020-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 21,074 -639 -2.94 7,481 13.64 1.4003
2020-07-15 2020-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 21,713 -924 -4.08 6,583 2.00 1.2998
2020-04-14 2020-03-31 13F/A-1 COSTCO WHOLESALE COMMON STOCK 22160K105 22,637 -2,097 -8.48 6,454 -11.21 1.5535
2020-04-14 2020-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 25,422 688 6,718 1,105,528.7959
2020-01-13 2019-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 24,734 -1,048 -4.06 7,269 -2.14 1.4359
2019-10-23 2019-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 25,782 360 1.42 7,428 10.57 1.5977
2019-07-16 2019-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 25,422 -1,441 -5.36 6,718 3.27 1.5136
2019-04-22 2019-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 26,863 -2,264 -7.77 6,505 9.64 1.4597
2019-01-17 2018-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 29,127 -485 -1.64 5,933 -14.69 1.4966
2018-11-23 2018-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 29,612 1,278 4.51 6,955 17.46 1.6084
2018-07-17 2018-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 28,334 97 0.34 5,921 11.28 1.4738
2018-04-27 2018-03-31 13F COSTCO WHOLESALE LARGE CAP - STOCKS 22160K105 28,237 -1,327 -4.49 5,321 -3.29 1.3284
2018-01-16 2017-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 29,564 -971 -3.18 5,502 9.69 1.3269
2017-10-13 2017-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 30,535 528 1.76 5,016 4.52 1.2468
2017-07-11 2017-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 30,007 -281 -0.93 4,799 -5.51 1.2457
2017-04-28 2017-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 30,288 -750 -2.42 5,079 2.21 1.3146
2017-01-20 2016-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 31,038 -569 -1.80 4,969 3.09 1.3280
2016-10-07 2016-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 31,607 -4,425 -12.28 4,820 -14.81 1.3541
2016-07-11 2016-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 36,032 -2,685 -6.93 5,658 -7.26 1.6269
2016-04-11 2016-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 38,717 1,711 4.62 6,101 2.09 1.7038
2016-01-12 2015-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 37,006 -5,621 -13.19 5,976 -3.02 1.7273
2015-10-13 2015-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 42,627 2,751 6.90 6,162 14.41 2.0323
2015-07-30 2015-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 39,876 34,066 586.33 5,386 512.05 1.7127
2015-04-21 2015-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 5,810 5,810 880 0.2928
2015-01-27 2014-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 0 -200 -100.00 0 -100.00
2014-10-16 2014-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 200 -2,789 -93.31 25 -92.98 0.0095
2014-09-11 2014-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 2,989 1,848 161.96 356 180.31 0.1377
2014-04-07 2014-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 1,141 -1,848 -61.83 127 -64.33 0.0496
2014-03-13 2013-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 2,989 0 0.00 356 3.49 0.1377
2013-10-30 2013-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 2,989 0 0.00 344 -99.90 0.1540
2013-07-09 2013-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 2,989 2,989 330,991 0.1573
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.