Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionFirestone Capital Management
Latest Disclosed Ownership736 shares
Latest Disclosed Value $ 733,539
Firestone Capital Management reports 2.26% decrease in ownership of COST / Costco Wholesale Corporation

On May 8, 2026 - Firestone Capital Management filed a 13F-HR form disclosing ownership of 736 shares of Costco Wholesale Corporation (MX:COST) valued at $733,539 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 753 shares of Costco Wholesale Corporation. This represents a change in shares of -2.26% 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)
2026-05-08 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 736 -17 -2.26 734 12.94 0.1527
2026-02-09 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 753 7 0.94 649 -5.94 0.1377
2025-11-05 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 746 5 0.67 690 -5.87 0.1492
2025-08-08 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 741 87 13.30 733 18.61 0.1726
2025-05-02 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 654 -69 -9.54 619 -6.65 0.1623
2025-02-14 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 723 0 0.00 663 3.28 0.1647
2024-11-14 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 723 0 0.00 641 4.40 0.1608
2024-08-09 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 723 0 0.00 615 16.07 0.1678
2024-05-07 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 723 -1 -0.14 530 10.67 0.1474
2024-02-05 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 724 0 0.00 478 16.87 0.1473
2023-11-07 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 724 0 0.00 409 2.25 0.1399
2023-07-26 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 724 3 0.42 400 11.73 0.1303
2023-05-11 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 721 123 20.57 358 31.62 0.1289
2023-02-09 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 598 0 0.00 273 -3.55 0.1014
2022-11-10 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 598 0 0.00 282 -1.40 0.1147
2022-08-05 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 598 0 0.00 286 -16.86 0.1112
2022-05-03 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 598 0 0.00 344 1.47 0.1127
2022-02-11 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 598 1 0.17 339 43.64 0.1069
2021-11-12 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 597 0 0.00 236 0.00 0.0781
2021-08-04 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 597 0 0.00 236 11.85 0.0852
2021-04-28 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 597 0 0.00 211 -6.22 0.0750
2021-02-10 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 597 0 0.00 225 6.13 0.0855
2020-10-26 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 597 -50 -7.73 212 8.16 0.0949
2020-07-27 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 647 0 0.00 196 5.95 0.0909
2020-04-20 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 647 11 1.73 185 -1.07 0.0962
2020-02-13 2019-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 636 636 187 0.0798
2020-02-10 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 3,928 187
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.