Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionFormidable Asset Management, LLC
Latest Disclosed Ownership1,362 shares
Latest Disclosed Value $ 1,174,222
Formidable Asset Management, LLC reports 0.80% decrease in ownership of COST / Costco Wholesale Corporation

On April 22, 2026 - Formidable Asset Management, LLC filed a 13F-HR form disclosing ownership of 1,362 shares of Costco Wholesale Corporation (MX:COST) valued at $1,174,222 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 1,373 shares of Costco Wholesale Corporation. This represents a change in shares of -0.80% 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)
2026-04-22 2026-03-31 13F COSTCO WHSL CORP COM 22160K105 1,362 -11 -0.80 1,174 -7.56 0.1813
2026-01-16 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 1,373 -3 -0.22 1,270 -6.75 0.1848
2025-10-29 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 1,376 90 7.00 1,363 12.01 0.2146
2025-07-16 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 1,286 0 0.00 1,217 0.00 0.2035
2025-05-05 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 1,286 -3 -0.23 1,217 2.96 0.2034
2025-02-19 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 1,289 -3 -0.23 1,181 3.14 0.1940
2024-11-12 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 1,292 -36 -2.71 1,145 1.51 0.1830
2024-08-08 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 1,328 25 1.92 1,128 18.24 0.1825
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 1,303 495 61.26 955 78.99 0.1556
2024-02-07 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 808 7 0.87 533 17.92 0.1108
2023-11-09 2023-09-30 13F COSTCO WHOLESALE COM 22160K105 801 0 0.00 452 0.1002
2023-08-15 2023-06-30 13F COSTCO WHOLESALE CORP COM COM 22160K105 801 0 0.00 0 0.0941
2023-05-09 2023-03-31 13F COSTCO WHOLESALE CORP COM COM 22160K105 801 -10 -1.23 0 0.0841
2023-02-07 2022-12-31 13F COSTCO WHOLESALE CORP COM COM 22160K105 811 -1 -0.12 0 -100.00 0.0836
2022-11-14 2022-09-30 13F COSTCO WHOLESALE COM 22160K105 812 1 0.12 405 2.27 0.0939
2022-08-18 2022-06-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 811 5 0.62 396 -14.66 0.0891
2022-08-16 2022-06-30 13F COSTCO WHOLESALE COM 22160K105 811 5 396 0.0920
2022-05-04 2022-03-31 13F COSTCO WHOLESALE COM 22160K105 806 0 0.00 464 1.98 0.0890
2022-02-07 2021-12-31 13F COSTCO WHOLESALE CORP COM COM 22160K105 806 -6 -0.74 455 24.66 0.0873
2021-11-10 2021-09-30 13F COSTCO WHOLESALE CORP COM COM 22160K105 812 0 0.00 365 10.27 0.0686
2021-08-16 2021-06-30 13F/A-2 COSTCO WHOLESALE CORP COM Common Stock 22160K105 812 0 0.00 331 15.33 0.0711
2021-08-06 2021-06-30 13F COSTCO WHOLESALE CORP COM COM 22160K105 134 -678 308 0.0726
2021-05-12 2021-03-31 13F COSTCO WHOLESALE CORP COM COM 22160K105 812 5 0.62 287 -6.21 0.0624
2021-01-29 2020-12-31 13F COSTCO WHOLESALE CORP COM COM 22160K105 807 0 0.00 306 6.99 0.0709
2020-12-14 2020-09-30 13F/A-1 COSTCO WHOLESALE Equity 22160K105 807 0 0.00 286 10.00 0.0834
2020-11-13 2020-09-30 13F COSTCO WHOLESALE CORP COM COM 22160K105 807 0 286 77,902.8339
2020-08-13 2020-06-30 13F COSTCO WHOLESALE Equity 22160K105 807 807 260 0.0767
2020-06-01 2020-03-31 13F COSTCO WHOLESALE CORP COM COM 22160K105 0 -799 -100.00 0 -100.00
2020-02-13 2019-12-31 13F COSTCO WHOLESALE CORP COM COM 22160K105 799 799 248 0.0782
2019-11-08 2019-09-30 13F COSTCO WHOLESALE CORP COM COM 22160K105 0 -803 -100.00 0 -100.00
2019-10-15 2019-06-30 13F COSTCO WHOLESALE CORP COM COM 22160K105 803 803 219 0.0753
2018-02-13 2017-12-31 13F COSTCO WHOLESALE Common 22160K105 0 -1,317 -100.00 0 -100.00
2017-11-13 2017-09-30 13F COSTCO WHOLESALE Common 22160K105 1,317 1,317 217 0.0916
2017-08-11 2017-06-30 13F COSTCO WHOLESALE Common 22160K105 0 -1,246 -100.00 0 -100.00
2017-05-12 2017-03-31 13F COSTCO WHOLESALE Common 22160K105 1,246 -225 -15.30 215 -8.90 0.0937
2017-02-08 2016-12-31 13F COSTCO WHOLESALE Common 22160K105 1,471 34 2.37 236 7.76 0.1192
2016-11-14 2016-09-30 13F COSTCO WHOLESALE Common 22160K105 1,437 9 0.63 219 -8.75 0.1088
2016-08-12 2016-06-30 13F COSTCO WHOLESALE Common 22160K105 1,428 233 19.50 240 32.60 0.1336
2016-05-10 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 1,195 0 0.00 181 -4.23 0.1272
2016-02-02 2015-12-31 13F COSTCO WHSL CORP COM 22160K105 1,195 0 0.00 189 9.88 0.1309
2015-11-12 2015-09-30 13F COSTCO WHSL CORP COM 22160K105 1,195 0 0.00 172 6.83 0.1149
2015-08-14 2015-06-30 13F COSTCO WHOLESALE COM 22160K105 1,195 200 20.10 161 12.59 0.1027
2015-05-14 2015-03-31 13F COSTCO WHOLESALE COM 22160K105 995 0 0.00 143 1.42 0.0941
2015-02-27 2014-12-31 13F COSTCO WHOLESALE COM 22160K105 995 0 0.00 141 5.22 0.0963
2014-11-14 2014-09-30 13F COSTCO WHOLESALE COM 22160K105 995 -144 -12.64 134 2.29 0.0886
2014-08-21 2014-06-30 13F COSTCO WHOLESALE COM 22160K105 1,139 -150 -11.64 131 -12.08 0.0791
2014-05-15 2014-03-31 13F COSTCO WHOLESALE COM 22160K105 1,289 0 0.00 149 1.36 0.1040
2014-02-18 2013-12-31 13F COSTCO WHOLESALE COM 22160K105 1,289 0 0.00 147 -0.68 0.0990
2013-11-26 2013-09-30 13F COSTCO WHOLESALE COM 22160K105 1,289 1,289 148 0.1279
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.