Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionSkyOak Wealth, LLC
Latest Disclosed Ownership2,083 shares
Latest Disclosed Value $ 2,075,564
SkyOak Wealth, LLC reports 1.28% decrease in ownership of COST / Costco Wholesale Corporation

On April 30, 2026 - SkyOak Wealth, LLC filed a 13F-HR form disclosing ownership of 2,083 shares of Costco Wholesale Corporation (MX:COST) valued at $2,075,564 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 2,110 shares of Costco Wholesale Corporation. This represents a change in shares of -1.28% 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)
2026-04-30 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 2,083 -27 -1.28 2,076 14.07 0.3801
2026-02-05 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 2,110 -20 -0.94 1,820 -7.71 0.3273
2025-10-23 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 2,130 1,405 193.79 1,972 174.90 0.3724
2025-07-30 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 725 0 0.00 718 4.67 0.1442
2025-05-01 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 725 0 0.00 686 3.16 0.1502
2025-01-24 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 725 0 0.00 664 3.43 0.1421
2024-11-04 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 725 0 0.00 643 4.22 0.1423
2024-08-12 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 725 -200 -21.62 616 -9.01 0.1438
2024-04-29 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 925 175 23.33 678 36.77 0.1622
2024-01-12 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 750 0 0.00 495 17.02 0.1289
2023-10-24 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 750 19 2.60 424 7.63 0.1238
2023-07-20 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 731 0 0.00 394 8.26 0.1112
2023-05-02 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 731 0 0.00 363 9.01 0.1108
2023-01-26 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 731 65 9.76 334 5.71 0.1122
2022-10-25 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 666 15 2.30 315 0.96 0.1129
2022-07-26 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 651 5 0.77 312 -16.13 0.1065
2022-04-18 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 646 0 0.00 372 1.36 0.1034
2022-01-24 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 646 -100 -13.40 367 9.55 0.0933
2021-10-21 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 746 0 0.00 335 13.56 0.0903
2021-07-19 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 746 -200 -21.14 295 -15.71 0.0789
2021-04-29 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 946 165 21.13 350 19.05 0.0974
2021-02-02 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 781 89 12.86 294 19.51 0.0914
2020-11-03 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 692 -11 -1.56 246 15.49 0.0884
2020-08-10 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 703 -188 -21.10 213 -16.14 0.0786
2020-05-04 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 891 62 7.48 254 4.10 0.1298
2020-02-04 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 829 829 244 0.0756
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.