Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionCheviot Value Management, LLC
Latest Disclosed Ownership1,689 shares
Latest Disclosed Value $ 1,682,611
Cheviot Value Management, LLC ownership in COST / Costco Wholesale Corporation

On May 12, 2026 - Cheviot Value Management, LLC filed a 13F-HR form disclosing ownership of 1,689 shares of Costco Wholesale Corporation (MX:COST) valued at $1,682,611 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 1,689 shares of Costco Wholesale Corporation. This represents a change in shares of 0.00% 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)
2026-05-12 2026-03-31 13F COSTCO WHOLESALE CORPORATION COM Stock 22160K105 1,689 0 0.00 1,683 3.70 0.1690
2026-02-03 2025-12-31 13F COSTCO WHOLESALE CORPORATION COM Stock 22160K105 1,689 -56 -3.21 1,622 0.56 0.1593
2025-10-31 2025-09-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,745 55 3.25 1,613 -2.71 0.1716
2025-08-13 2025-06-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,690 0 0.00 1,658 -3.32 0.1901
2025-05-09 2025-03-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,690 557 49.16 1,715 65.22 0.2110
2025-02-14 2024-12-31 13F Costco Wholesale COM 22160K105 1,133 -3 -0.26 1,038 3.08 0.1985
2024-11-14 2024-09-30 13F Costco Wholesale COM 22160K105 1,136 -1 -0.09 1,007 4.24 0.1900
2024-08-14 2024-06-30 13F Costco Wholesale COM 22160K105 1,137 -45 -3.81 967 11.55 0.1888
2024-05-14 2024-03-31 13F Costco Wholesale COM 22160K105 1,182 45 3.96 866 15.47 0.1899
2024-02-14 2023-12-31 13F Costco Wholesale COM 22160K105 1,137 -198 -14.83 751 -0.53 0.1616
2023-11-07 2023-09-30 13F Costco Wholesale COM 22160K105 1,335 -7 -0.52 754 4.43 0.1670
2023-11-07 2023-06-30 13F Costco Wholesale COM 22160K105 1,342 109 8.84 723 17.97 0.1574
2023-05-15 2023-03-31 13F Costco Wholesale COM 22160K105 1,233 -17 -1.36 613 7.37 0.1473
2023-02-13 2022-12-31 13F Costco Wholesale COM 22160K105 1,250 136 12.21 571 8.37 0.1404
2022-11-14 2022-09-30 13F Costco Wholesale COM 22160K105 1,114 -100 -8.24 526 -9.62 0.1437
2022-08-03 2022-06-30 13F Costco Wholesale COM 22160K105 1,214 0 0.00 582 -16.74 0.1452
2022-05-11 2022-03-31 13F Costco Wholesale COM 22160K105 1,214 -100 -7.61 699 -6.30 0.1479
2022-02-14 2021-12-31 13F Costco Wholesale COM 22160K105 1,314 0 0.00 746 26.23 0.1748
2021-11-12 2021-09-30 13F Costco Wholesale COM 22160K105 1,314 1 0.08 591 13.65 0.1516
2021-08-16 2021-06-30 13F Costco Wholesale COM 22160K105 1,313 -150 -10.25 520 0.78 0.1277
2021-05-14 2021-03-31 13F Costco Wholesale COM 22160K105 1,463 448 44.14 516 35.08 0.1434
2021-02-12 2020-12-31 13F Costco Wholesale COM 22160K105 1,015 0 0.00 382 6.11 0.1153
2020-11-12 2020-09-30 13F Costco Wholesale COM 22160K105 1,015 -6 -0.59 360 16.13 0.1249
2020-08-17 2020-06-30 13F Costco Wholesale COM 22160K105 1,021 0 0.00 310 6.53 0.1209
2020-05-13 2020-03-31 13F Costco Wholesale COM 22160K105 1,021 122 13.57 291 10.23 0.1327
2020-02-12 2019-12-31 13F Costco COM 22160K105 899 17 1.93 264 3.94 0.1017
2019-11-15 2019-09-30 13F Costco COM 22160K105 882 1 0.11 254 9.01 0.1082
2019-08-14 2019-06-30 13F Costco COM 22160K105 881 881 233 0.1008
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.