Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionCNB Bank
Latest Disclosed Ownership3,099 shares
Latest Disclosed Value $ 3,087,937
CNB Bank reports 1.21% increase in ownership of COST / Costco Wholesale Corporation

On May 6, 2026 - CNB Bank filed a 13F-HR form disclosing ownership of 3,099 shares of Costco Wholesale Corporation (MX:COST) valued at $3,087,937 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 3,062 shares of Costco Wholesale Corporation. This represents a change in shares of 1.21% 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)
2026-05-06 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 3,099 37 1.21 3,088 16.93 1.2617
2026-02-11 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 3,062 141 4.83 2,640 -2.33 1.0806
2025-10-30 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 2,921 75 2.64 2,704 -4.05 1.1264
2025-07-31 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 2,846 -68 -2.33 2,817 2.21 1.3356
2025-04-24 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 2,914 -69 -2.31 2,756 0.84 1.3951
2025-01-15 2024-12-31 13F Costco Wholesale COM 22160K105 2,983 89 3.08 2,733 6.55 1.2701
2024-10-18 2024-09-30 13F Costco Wholesale COM 22160K105 2,894 -178 -5.79 2,566 -1.76 1.1866
2024-08-08 2024-06-30 13F Costco Wholesale COM 22160K105 3,072 731 31.23 2,611 52.24 1.2561
2024-05-02 2024-03-31 13F Costco Wholesale COM 22160K105 2,341 82 3.63 1,715 15.02 0.8364
2024-01-31 2023-12-31 13F Costco Wholesale COM 22160K105 2,259 35 1.57 1,491 18.71 0.8006
2023-11-02 2023-09-30 13F Costco Wholesale COM 22160K105 2,224 117 5.55 1,256 10.76 0.7398
2023-08-08 2023-06-30 13F Costco Wholesale COM 22160K105 2,107 10 0.48 1,134 8.93 0.6673
2023-05-10 2023-03-31 13F Costco Wholesale COM 22160K105 2,097 50 2.44 1,042 11.46 0.6341
2023-02-13 2022-12-31 13F Costco Wholesale COM 22160K105 2,047 16 0.79 934 -2.61 0.5842
2022-11-14 2022-09-30 13F Costco Wholesale COM 22160K105 2,031 103 5.34 959 3.79 0.6488
2022-08-19 2022-06-30 13F/A-1 Costco Wholesale COM 22160K105 1,928 -25 -1.28 924 -17.79 0.5977
2022-08-10 2022-06-30 13F Costco Wholesale COM 22160K105 1,928 -25 924 0.3810
2022-04-13 2022-03-31 13F Costco Wholesale COM 22160K105 1,953 -57 -2.84 1,124 -1.49 0.6231
2022-01-31 2021-12-31 13F Costco Wholesale COM 22160K105 2,010 -7 -0.35 1,141 25.94 0.6252
2021-11-02 2021-09-30 13F Costco Wholesale COM 22160K105 2,017 50 2.54 906 16.45 0.5442
2021-07-29 2021-06-30 13F Costco Wholesale COM 22160K105 1,967 126 6.84 778 20.06 0.4865
2021-05-03 2021-03-31 13F Costco Wholesale COM 22160K105 1,841 345 23.06 648 14.89 0.4483
2021-01-27 2020-12-31 13F Costco Wholesale COM 22160K105 1,496 -4 -0.27 564 5.82 0.4260
2020-10-26 2020-09-30 13F Costco Wholesale COM 22160K105 1,500 -351 -18.96 533 -4.99 0.4486
2020-07-14 2020-06-30 13F Costco Wholesale COM 22160K105 1,851 34 1.87 561 8.30 0.4937
2020-05-13 2020-03-31 13F Costco Wholesale COM 22160K105 1,817 17 0.94 518 -2.08 0.5580
2020-01-27 2019-12-31 13F Costco Wholesale COM 22160K105 1,800 -11 -0.61 529 1.54 0.4478
2019-11-04 2019-09-30 13F Costco Wholesale COM 22160K105 1,811 -36 -1.95 521 6.76 0.4822
2019-08-14 2019-06-30 13F Costco Wholesale COM 22160K105 1,847 -122 -6.20 488 2.31 0.4165
2019-04-29 2019-03-31 13F Costco Wholesale COM 22160K105 1,969 185 10.37 477 31.40 0.2457
2019-02-06 2018-12-31 13F Costco Wholesale COM 22160K105 1,784 265 17.45 363 1.68 0.2313
2018-11-13 2018-09-30 13F Costco Wholesale COM 22160K105 1,519 -293 -16.17 357 -5.56 0.2043
2018-08-14 2018-06-30 13F Costco Wholesale COM 22160K105 1,812 37 2.08 378 12.84 0.2202
2018-05-11 2018-03-31 13F Costco Wholesale COM 22160K105 1,775 261 17.24 335 18.79 0.1957
2018-02-20 2017-12-31 13F Costco Wholesale COM 22160K105 1,514 1,514 282 0.1686
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.