Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionVan Cleef Asset Management,Inc
Latest Disclosed Ownership1,171 shares
Latest Disclosed Value $ 1,166,820
Van Cleef Asset Management,Inc ownership in COST / Costco Wholesale Corporation

On May 1, 2026 - Van Cleef Asset Management,Inc filed a 13F-HR form disclosing ownership of 1,171 shares of Costco Wholesale Corporation (MX:COST) valued at $1,166,820 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 1,171 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)
2026-05-01 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 1,171 0 0.00 1,167 15.56 0.1256
2026-02-09 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 1,171 -69 -5.56 1,010 -12.03 0.1024
2025-11-04 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 1,240 1 0.08 1,147 -6.52 0.1166
2025-08-06 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 1,239 -99 -7.40 1,227 -3.00 0.1322
2025-04-30 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 1,338 0 0.00 1,266 3.18 0.1431
2025-02-05 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 1,338 11 0.83 1,226 4.25 0.1344
2024-11-04 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 1,327 701 111.98 1,177 121.05 0.1306
2024-08-07 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 626 0 0.00 532 16.16 0.0667
2024-05-10 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 626 0 0.00 459 10.90 0.0580
2024-02-02 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 626 204 48.34 413 73.53 0.0581
2023-11-07 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 422 30 7.65 239 12.80 0.0376
2023-08-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 392 392 211 0.0324
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.