Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionFinancial Advisory Service, Inc.
Latest Disclosed Ownership7,265 shares
Latest Disclosed Value $ 6,264,910
Financial Advisory Service, Inc. reports 3.80% increase in ownership of COST / Costco Wholesale Corporation

On February 18, 2026 - Financial Advisory Service, Inc. filed a 13F-HR form disclosing ownership of 7,265 shares of Costco Wholesale Corporation (MX:COST) valued at $6,264,910 USD as of December 31, 2025. The entity filed a previous 13F-HR on October 29, 2025 disclosing 6,999 shares of Costco Wholesale Corporation. This represents a change in shares of 3.80% 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)
2026-02-18 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 7,265 266 3.80 6,265 -3.30 0.4048
2025-10-29 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 6,999 107 1.55 6,478 -5.04 0.4387
2025-08-14 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 6,892 283 4.28 6,823 9.15 0.5047
2025-05-05 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 6,609 256 4.03 6,250 7.39 0.5098
2025-02-14 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 6,353 138 2.22 5,821 5.65 0.4888
2024-10-17 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 6,215 259 4.35 5,509 8.83 0.4382
2024-07-29 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 5,956 -168 -2.74 5,063 12.84 0.4375
2024-04-29 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 6,124 33 0.54 4,487 11.59 0.3976
2024-01-23 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 6,091 1,109 22.26 4,020 42.86 0.3820
2023-10-23 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 4,982 222 4.66 2,815 9.84 0.3009
2023-08-08 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 4,760 378 8.63 2,563 17.68 0.3241
2023-05-11 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 4,382 -249 -5.38 2,177 3.03 0.2360
2023-02-01 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 4,631 460 11.03 2,114 7.26 0.2395
2022-10-20 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 4,171 576 16.02 1,970 14.34 0.2188
2022-08-02 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 3,595 893 33.05 1,723 10.73 0.1814
2022-05-04 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 2,702 533 24.57 1,556 26.40 0.1464
2022-02-11 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 2,169 743 52.10 1,231 92.04 0.1130
2021-11-15 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 1,426 254 21.67 641 38.15 0.0600
2021-07-29 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 1,172 379 47.79 464 65.71 0.0435
2021-05-17 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 793 86 12.16 280 5.26 0.0291
2021-02-10 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 707 138 24.25 266 31.68 0.0303
2020-11-16 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 569 569 202 0.0276
2019-02-08 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 0 -965 -100.00 0 -100.00
2018-11-05 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 965 965 227 0.0517
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.