Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionPetix & Botte Co
Latest Disclosed Ownership3,992 shares
Latest Disclosed Value $ 7,955,360
Petix & Botte Co reports 49.86% decrease in ownership of COST / Costco Wholesale Corporation

On April 30, 2026 - Petix & Botte Co filed a 13F-HR form disclosing ownership of 3,992 shares of Costco Wholesale Corporation (MX:COST) valued at $7,955,360 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 7,961 shares of Costco Wholesale Corporation. This represents a change in shares of -49.86% 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)
2026-04-30 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 3,992 -3,969 -49.86 7,955 15.88 1.1823
2026-02-05 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 7,961 1 0.01 6,865 -6.83 1.5575
2025-11-21 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 7,960 0 0.00 7,369 -6.49 1.7002
2025-08-08 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 7,960 30 0.38 7,880 5.07 1.9335
2025-05-13 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 7,930 0 0.00 7,500 3.22 1.9750
2025-01-21 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 7,930 2 0.03 7,265 3.37 1.9106
2024-10-18 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 7,928 -3,990 -33.48 7,029 -30.62 1.8713
2024-08-13 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 11,918 5,960 100.03 10,130 132.07 2.8694
2024-05-06 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 5,958 -5,950 -49.97 4,365 -44.46 1.0844
2024-02-06 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 11,908 2 0.02 7,860 16.85 2.3135
2023-11-15 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 11,906 -2 -0.02 6,727 4.93 2.1212
2023-08-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 11,908 5,955 100.03 6,411 116.70 1.9899
2023-05-15 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 5,953 -1,550 -20.66 2,958 -16.51 1.9934
2022-10-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 7,503 2,555 51.64 3,543 49.37 2.6965
2022-08-04 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 4,948 -4,948 -50.00 2,372 -58.37 1.7468
2022-04-26 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 9,896 4,949 100.04 5,698 102.85 1.7569
2022-02-11 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 4,947 -4,951 -50.02 2,809 -36.85 1.7867
2021-11-12 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 9,898 5,015 102.70 4,448 130.23 1.5067
2021-07-29 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 4,883 1 0.02 1,932 12.26 1.3471
2021-05-24 2021-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,882 0 0.00 1,721 -6.42 1.2713
2021-04-29 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 9,765 4,883 1,723 1.2421
2021-01-29 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 4,882 6 0.12 1,839 6.24 1.3764
2020-10-30 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 4,876 -4,875 -49.99 1,731 17.12 1.3804
2020-08-07 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 9,751 4,876 100.02 1,478 6.33 1.2174
2020-04-29 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 4,875 90 1.88 1,390 -1.14 1.3529
2020-02-14 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 4,785 4,785 1,406 1.1065
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.