Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionUnited Bank
Latest Disclosed Ownership6,020 shares
Latest Disclosed Value $ 5,998,509
United Bank reports 6.17% increase in ownership of COST / Costco Wholesale Corporation

On May 1, 2026 - United Bank filed a 13F-HR form disclosing ownership of 6,020 shares of Costco Wholesale Corporation (MX:COST) valued at $5,998,509 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 5,670 shares of Costco Wholesale Corporation. This represents a change in shares of 6.17% 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)
2026-05-01 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 6,020 350 6.17 5,999 22.68 1.9952
2026-02-05 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 5,670 -424 -6.96 4,889 -13.32 1.6578
2025-11-12 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 6,094 248 4.24 5,641 -2.54 1.9603
2025-07-29 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 5,846 235 4.19 5,787 9.07 2.2144
2025-05-06 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 5,611 -830 -12.89 5,307 -10.08 2.1929
2025-02-12 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 6,441 479 8.03 5,902 11.66 2.4929
2024-11-01 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 5,962 416 7.50 5,285 12.11 2.4380
2024-07-23 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 5,546 -35 -0.63 4,714 15.31 2.3526
2024-05-10 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 5,581 -39 -0.69 4,089 10.22 2.0784
2024-02-13 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 5,620 -13 -0.23 3,710 16.56 2.0465
2023-10-27 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 5,633 -164 -2.83 3,182 1.99 1.9026
2023-08-07 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 5,797 -127 -2.14 3,121 6.01 1.7770
2023-05-12 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 5,924 112 1.93 2,943 10.93 1.7243
2023-02-10 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 5,812 222 3.97 2,653 0.49 1.6282
2022-11-10 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 5,590 68 1.23 2,640 -0.26 1.7575
2022-08-05 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 5,522 268 5.10 2,647 -12.52 1.6441
2022-05-09 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 5,254 444 9.23 3,026 10.80 1.6041
2022-02-11 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 4,810 -144 -2.91 2,731 22.69 1.4644
2021-11-12 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 4,954 -42 -0.84 2,226 12.59 1.4117
2021-07-26 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 4,996 144 2.97 1,977 15.61 1.3318
2021-05-12 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 4,852 -97 -1.96 1,710 -8.31 1.2002
2021-02-11 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 4,949 130 2.70 1,865 9.00 1.3334
2020-11-10 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 4,819 124 2.64 1,711 20.15 1.4268
2020-08-05 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 4,695 -18 -0.38 1,424 5.95 1.3403
2020-05-08 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 4,713 -1,474 -23.82 1,344 -26.07 1.3877
2020-02-03 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 6,187 -149 -2.35 1,818 -0.38 1.2307
2019-11-08 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 6,336 -109 -1.69 1,825 7.16 1.3527
2019-07-22 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 6,445 -146 -2.22 1,703 6.70 1.3317
2019-05-01 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 6,591 804 13.89 1,596 35.37 1.2705
2019-02-11 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 5,787 -606 -9.48 1,179 -21.50 1.0874
2018-11-05 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 6,393 69 1.09 1,502 13.62 1.1872
2018-08-09 2018-06-30 13F Costco Wholesale Corp COMMON COM 22160K105 6,324 185 3.01 1,322 14.26 1.1378
2018-05-07 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 6,139 67 1.10 1,157 2.39 1.0512
2018-02-07 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 6,072 -277 -4.36 1,130 8.34 0.9671
2017-11-08 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 6,349 70 1.11 1,043 3.88 0.9776
2017-07-31 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 6,279 -100 -1.57 1,004 -6.17 0.9313
2017-05-08 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 6,379 380 6.33 1,070 11.46 1.0177
2017-02-10 2016-12-31 13F COSTCO WHSL CORP COM 22160K105 5,999 5,999 960 0.9792
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.