Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionNWK Group, Inc.
Latest Disclosed Ownership14,797 shares
Latest Disclosed Value $ 14,744,175
NWK Group, Inc. reports 0.83% decrease in ownership of COST / Costco Wholesale Corporation

On May 7, 2026 - NWK Group, Inc. filed a 13F-HR form disclosing ownership of 14,797 shares of Costco Wholesale Corporation (MX:COST) valued at $14,744,175 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 14,921 shares of Costco Wholesale Corporation. This represents a change in shares of -0.83% 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)
2026-05-07 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 14,797 -124 -0.83 14,744 14.60 5.6581
2026-02-09 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 14,921 4 0.03 12,867 -6.82 4.4687
2025-11-10 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 14,917 -31 -0.21 13,808 -6.69 4.6960
2025-08-04 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 14,948 -151 -1.00 14,798 3.63 5.1968
2025-05-12 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 15,099 -431 -2.78 14,280 0.35 6.5324
2025-02-13 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 15,530 117 0.76 14,229 4.14 5.4985
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 15,413 -171 -1.10 13,664 3.16 5.5603
2024-08-13 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 15,584 5 0.03 13,246 16.05 5.5658
2024-05-10 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 15,579 335 2.20 11,413 13.44 5.3483
2024-02-12 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 15,244 263 1.76 10,062 18.88 5.1759
2023-11-13 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 14,981 321 2.19 8,463 7.24 5.1931
2023-08-10 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 14,660 6,341 76.22 7,893 90.95 4.6239
2023-05-15 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 8,319 -23 -0.28 4,134 8.53 2.6851
2023-02-14 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 8,342 25 0.30 3,808 -3.05 2.8020
2022-11-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 8,317 -285 -3.31 3,928 -4.73 3.0386
2022-08-15 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 8,602 8,602 4,123 2.7802
2021-05-14 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 0 -7 -100.00 0 -100.00
2021-02-10 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 7 7 3 0.0013
2020-05-12 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 0 -14 -100.00 0 -100.00
2020-02-13 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 14 14 4 0.0033
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.