Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionCooper Financial Group
Latest Disclosed Ownership4,347 shares
Latest Disclosed Value $ 4,331,353
Cooper Financial Group reports 1.47% increase in ownership of COST / Costco Wholesale Corporation

On April 7, 2026 - Cooper Financial Group filed a 13F-HR form disclosing ownership of 4,347 shares of Costco Wholesale Corporation (MX:COST) valued at $4,331,353 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 4,284 shares of Costco Wholesale Corporation. This represents a change in shares of 1.47% 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)
2026-04-07 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 4,347 63 1.47 4,331 17.24 0.4377
2026-01-08 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 4,284 -47 -1.09 3,694 -7.86 0.3931
2025-10-07 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 4,331 -236 -5.17 4,009 -11.32 0.4437
2025-07-18 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 4,567 -530 -10.40 4,521 -6.20 0.5318
2025-05-12 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 5,097 234 4.81 4,821 8.19 0.6350
2025-01-13 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 4,863 263 5.72 4,456 9.27 0.5366
2024-11-14 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 4,600 175 3.95 4,078 8.40 0.5293
2024-07-15 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 4,425 278 6.70 3,761 23.80 0.5530
2024-04-11 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 4,147 60 1.47 3,038 12.64 0.4994
2024-01-16 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 4,087 355 9.51 2,698 27.94 0.4905
2023-10-13 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 3,732 99 2.73 2,109 7.77 0.5069
2023-07-07 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 3,633 75 2.11 1,956 10.63 0.4850
2023-05-11 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 3,558 62 1.77 1,768 10.78 0.4764
2023-01-13 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 3,496 224 6.85 1,596 3.30 0.4874
2022-10-13 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 3,272 -725 -18.14 1,545 -19.36 0.5559
2022-07-11 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 3,997 239 6.36 1,916 -11.46 0.6958
2022-04-25 2022-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 3,758 774 25.94 2,164 27.74 0.8219
2022-04-12 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 3,758 774 2,164 0.8212
2022-02-11 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 2,984 -146 -4.66 1,694 20.40 0.6394
2021-10-06 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 3,130 4 0.13 1,407 13.74 0.2919
2021-07-12 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 3,126 84 2.76 1,237 15.39 0.2515
2021-05-17 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 3,042 -1,361 -30.91 1,072 -35.38 0.2421
2021-02-16 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 4,403 1,753 66.15 1,659 76.30 0.3384
2020-10-09 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 2,650 -329 -11.04 941 4.21 0.2716
2020-07-15 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 2,979 240 8.76 903 15.62 0.2923
2020-05-15 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 2,739 1,695 162.36 781 154.40 0.3255
2020-01-07 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 1,044 249 31.32 307 34.06 0.1229
2019-10-08 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 795 -157 -16.49 229 -9.13 0.1033
2019-07-08 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 952 952 252 0.1222
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.