Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionFounders Capital Management
Latest Disclosed Ownership458 shares
Latest Disclosed Value $ 456,365
Founders Capital Management ownership in COST / Costco Wholesale Corporation

On April 21, 2026 - Founders Capital Management filed a 13F-HR form disclosing ownership of 458 shares of Costco Wholesale Corporation (MX:COST) valued at $456,365 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 15, 2026 disclosing 458 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)
2026-04-21 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 458 0 0.00 456 15.74 0.2228
2026-01-15 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 458 0 0.00 395 -6.86 0.2051
2025-11-13 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 458 0 0.00 424 -6.62 0.2246
2025-07-18 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 458 0 0.00 453 4.62 0.2718
2025-04-08 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 458 -8 -1.72 433 1.64 0.2803
2025-01-13 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 466 0 0.00 427 3.15 0.2703
2024-10-07 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 466 6 1.30 413 5.90 0.2515
2024-07-10 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 460 0 0.00 391 15.73 0.2534
2024-04-10 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 460 0 0.00 337 11.22 0.2278
2024-01-08 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 460 10 2.22 304 19.29 0.2206
2023-10-10 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 450 11 2.51 254 7.63 0.1941
2023-07-07 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 439 0 0.00 236 0.1719
2023-04-12 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 439 0 0.00 0 0.1667
2023-01-09 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 439 0 0.00 0 -100.00 0.1503
2022-10-06 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 439 -6 -1.35 207 -2.82 0.1689
2022-07-20 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 445 0 0.00 213 -15.81 0.1679
2022-04-07 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 445 0 0.00 253 0.00 0.1622
2022-01-21 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 445 0 0.00 253 26.50 0.1622
2021-10-12 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 445 0 0.00 200 13.64 0.1371
2021-07-15 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 445 0 0.00 176 12.10 0.1147
2021-06-09 2021-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 445 0 0.00 157 -6.55 0.1117
2021-06-07 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 445 0 6 0.0658
2021-01-12 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 445 65 17.11 168 55.56 0.1188
2020-04-22 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 380 -20 -5.00 108 -8.47 0.1120
2020-01-24 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 400 0 0.00 118 2.61 0.0893
2019-10-10 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 400 40 11.11 115 21.05 0.0920
2019-07-11 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 360 0 0.00 95 9.20 0.0838
2019-04-17 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 360 10 2.86 87 22.54 0.0816
2019-01-14 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 350 25 7.69 71 -6.58 0.0758
2018-10-05 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 325 0 0.00 76 11.76 0.0627
2018-07-09 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 325 25 8.33 68 19.30 0.0597
2018-04-09 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 300 0 0.00 57 1.79 0.0480
2018-01-22 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 300 0 0.00 56 14.29 0.0464
2017-10-17 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 300 200 200.00 49 206.25 0.0406
2017-07-19 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 100 -25 -20.00 16 -23.81 0.0142
2017-05-09 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 125 125 21 0.0189
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.