Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionAries Wealth Management
Latest Disclosed Ownership4,025 shares
Latest Disclosed Value $ 4,010,631
Aries Wealth Management reports 2.73% increase in ownership of COST / Costco Wholesale Corporation

On May 14, 2026 - Aries Wealth Management filed a 13F-HR form disclosing ownership of 4,025 shares of Costco Wholesale Corporation (MX:COST) valued at $4,010,631 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 3,918 shares of Costco Wholesale Corporation. This represents a change in shares of 2.73% 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)
2026-05-14 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 4,025 107 2.73 4,011 18.71 0.8818
2026-01-30 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 3,918 150 3.98 3,379 -3.13 0.7481
2025-11-10 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 3,768 204 5.72 3,488 -1.16 0.8252
2025-07-28 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 3,564 -123 -3.34 3,528 1.18 0.9220
2025-04-17 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 3,687 140 3.95 3,487 7.29 0.9469
2025-01-30 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 3,547 0 0.00 3,250 3.37 0.8948
2024-10-31 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 3,547 -85 -2.34 3,144 1.85 0.8643
2024-07-25 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 3,632 -5 -0.14 3,087 15.88 0.9728
2024-05-03 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 3,637 -80 -2.15 2,665 8.60 0.8587
2024-01-10 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 3,717 -207 -5.28 2,454 9.27 0.8749
2023-10-19 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 3,924 75 1.95 2,245 8.35 0.8789
2023-07-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 3,849 -28 -0.72 2,072 7.58 0.8035
2023-04-11 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 3,877 -10 -0.26 1,926 8.57 0.7900
2023-01-19 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 3,887 135 3.60 1,774 -5.74 0.7648
2022-11-02 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 3,752 113 3.11 1,882 7.91 0.8329
2022-07-27 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 3,639 3,639 1,744 0.7918
2022-04-23 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 0 -3,614 -100.00 0 -100.00
2022-06-06 2021-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 3,614 89 2.52 2,052 29.55 0.7819
2022-01-18 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 25,298 21,773 14,362 0.7860
2021-10-13 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 3,525 124 3.65 1,584 17.68 0.6700
2021-07-14 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 3,401 52 1.55 1,346 10.69 0.5757
2021-04-20 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 3,349 52 1.58 1,216 -0.33 0.5462
2021-01-22 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 3,297 8 0.24 1,220 4.45 0.6095
2020-10-14 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 3,289 63 1.95 1,168 19.43 0.6629
2020-07-09 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 3,226 143 4.64 978 8.79 0.5970
2020-04-09 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 3,083 15 0.49 899 0.45 0.6854
2020-01-13 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 3,068 0 0.00 895 -1.97 0.5463
2019-10-22 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 3,068 -24 -0.78 913 10.13 0.6072
2019-07-15 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 3,092 -20 -0.64 829 9.95 0.5795
2019-04-09 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 3,112 -5 -0.16 754 18.74 0.5638
2019-01-15 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 3,117 326 11.68 635 -3.20 0.6734
2018-11-14 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 2,791 0 0.00 656 7.54 0.5891
2018-08-07 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 2,791 0 0.00 610 19.14 0.5639
2018-04-17 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 2,791 100 3.72 512 -0.97 0.4960
2018-02-05 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 2,691 2,691 517 0.4761
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.