Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionStanley-Laman Group, Ltd.
Latest Disclosed Ownership5,127 shares
Latest Disclosed Value $ 5,108,856
Stanley-Laman Group, Ltd. reports 3.74% increase in ownership of COST / Costco Wholesale Corporation

On April 16, 2026 - Stanley-Laman Group, Ltd. filed a 13F-HR form disclosing ownership of 5,127 shares of Costco Wholesale Corporation (MX:COST) valued at $5,108,856 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 4,942 shares of Costco Wholesale Corporation. This represents a change in shares of 3.74% 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)
2026-04-16 2026-03-31 13F COSTCO WHSL CORP COM 22160K105 5,127 185 3.74 5,109 19.88 0.6179
2026-01-23 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 4,942 293 6.30 4,262 -0.98 0.5416
2025-10-22 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 4,649 -39 -0.83 4,303 -7.26 0.6132
2025-07-29 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 4,688 -535 -10.24 4,641 -6.05 0.6893
2025-04-16 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 5,223 -462 -8.13 4,940 -5.18 0.7601
2025-01-29 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 5,685 -1,018 -15.19 5,209 -12.34 0.7315
2024-10-22 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 6,703 -800 -10.66 5,942 -6.82 0.8340
2024-07-18 2024-06-30 13F COSTCO WHOLESALE COM 22160K105 7,503 148 2.01 6,377 18.36 0.9165
2024-04-17 2024-03-31 13F COSTCO WHOLESALE COM 22160K105 7,355 619 9.19 5,388 21.19 0.7555
2024-02-02 2023-12-31 13F COSTCO WHOLESALE COM 22160K105 6,736 217 3.33 4,446 20.75 0.6802
2023-10-16 2023-09-30 13F COSTCO WHOLESALE COM 22160K105 6,519 -161 -2.41 3,683 2.39 0.6285
2023-08-08 2023-06-30 13F COSTCO WHOLESALE COM 22160K105 6,680 -61 -0.90 3,596 7.38 0.5940
2023-04-18 2023-03-31 13F COSTCO WHOLESALE COM 22160K105 6,741 58 0.87 3,349 9.80 0.5963
2023-01-19 2022-12-31 13F COSTCO WHOLESALE COM 22160K105 6,683 -155 -2.27 3,051 -5.54 0.5813
2022-10-18 2022-09-30 13F COSTCO WHOLESALE COM 22160K105 6,838 244 3.70 3,229 2.18 0.6125
2022-08-08 2022-06-30 13F COSTCO WHOLESALE COM 22160K105 6,594 45 0.69 3,160 -16.20 0.5622
2022-04-21 2022-03-31 13F COSTCO WHOLESALE COM 22160K105 6,549 -451 -6.44 3,771 -5.11 0.5222
2022-01-25 2021-12-31 13F COSTCO WHOLESALE COM 22160K105 7,000 1,150 19.66 3,974 51.16 0.4676
2021-11-03 2021-09-30 13F COSTCO WHOLESALE COM 22160K105 5,850 645 12.39 2,629 27.68 0.3420
2021-07-28 2021-06-30 13F COSTCO WHOLESALE COM 22160K105 5,205 182 3.62 2,059 16.26 0.2927
2021-05-05 2021-03-31 13F COSTCO WHOLESALE COM 22160K105 5,023 104 2.11 1,771 -4.43 0.2923
2021-02-09 2020-12-31 13F COSTCO WHOLESALE COM 22160K105 4,919 896 22.27 1,853 29.76 0.3283
2020-10-20 2020-09-30 13F COSTCO WHOLESALE COM 22160K105 4,023 409 11.32 1,428 30.29 0.3151
2020-07-20 2020-06-30 13F COSTCO WHOLESALE COM 22160K105 3,614 46 1.29 1,096 7.77 0.2636
2020-05-12 2020-03-31 13F COSTCO WHOLESALE COM 22160K105 3,568 3,568 1,017 0.3087
2016-05-09 2016-03-31 13F COSTCO WHOLESALE COM 22160K105 0 -13,950 -100.00 0 -100.00
2016-01-26 2015-12-31 13F COSTCO WHOLESALE COM 22160K105 13,950 6,103 77.77 2,253 98.68 0.3858
2015-11-03 2015-09-30 13F COSTCO WHOLESALE COM 22160K105 7,847 403 5.41 1,134 12.84 0.2308
2015-07-28 2015-06-30 13F COSTCO WHOLESALE COM 22160K105 7,444 250 3.48 1,005 -7.80 0.1842
2015-05-08 2015-03-31 13F COSTCO WHSL CORP COM 22160K105 7,194 7,194 1,090 0.1994
2015-01-30 2014-12-31 13F COSTCO WHSL CORP COM 22160K105 0 -5,757 -100.00 0 -100.00
2014-11-14 2014-09-30 13F COSTCO WHSL CORP COM 22160K105 5,757 312 5.73 721 14.99 0.1401
2014-07-02 2014-06-30 13F COSTCO WHSL CORP COM 22160K105 5,445 2,597 91.19 627 97.17 0.1151
2014-04-11 2014-03-31 13F COSTCO WHSL CORP COM 22160K105 2,848 2,848 318 0.0556
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.