Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionAaron Wealth Advisors LLC
Latest Disclosed Ownership5,583 shares
Latest Disclosed Value $ 5,563,069
Aaron Wealth Advisors LLC reports 2.46% increase in ownership of COST / Costco Wholesale Corporation

On April 21, 2026 - Aaron Wealth Advisors LLC filed a 13F-HR form disclosing ownership of 5,583 shares of Costco Wholesale Corporation (MX:COST) valued at $5,563,069 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 5,449 shares of Costco Wholesale Corporation. This represents a change in shares of 2.46% 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 5,583 134 2.46 5,563 18.41 0.3158
2026-01-21 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 5,449 358 7.03 4,699 -0.30 0.2568
2025-10-03 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 5,091 1,127 28.43 4,712 20.08 0.2792
2025-07-09 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 3,964 811 25.72 3,924 31.59 0.4009
2025-04-28 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 3,153 158 5.28 2,982 8.67 0.3418
2025-01-15 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 2,995 242 8.79 2,744 12.46 0.3186
2024-10-17 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 2,753 359 15.00 2,441 19.96 0.2907
2024-07-22 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 2,394 82 3.55 2,035 20.14 0.2824
2024-04-25 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 2,312 547 30.99 1,694 45.32 0.2428
2024-01-26 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 1,765 152 9.42 1,165 27.88 0.1932
2023-10-19 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 1,613 41 2.61 911 7.68 0.1175
2023-07-26 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 1,572 135 9.39 846 18.49 0.1100
2023-05-02 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 1,437 -155 -9.74 714 -1.65 0.0982
2023-01-24 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 1,592 510 47.13 727 42.07 0.1061
2022-10-21 2022-09-30 13F Costco WHSL Corp COM 22160K105 1,082 -190 -14.94 511 -16.09 0.0942
2022-07-22 2022-06-30 13F COSTCO WHOLESALE COM 22160K105 1,272 -390,881 -99.68 609 -10.57 0.1531
2022-05-10 2022-03-31 13F COSTCO WHOLESALE COM 22160K105 392,153 391,297 45,712.27 681 40.41 0.0094
2022-01-21 2021-12-31 13F COSTCO WHOLESALE COM 22160K105 856 856 485 0.1356
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.