Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionAvidian Wealth Solutions, LLC
Latest Disclosed Ownership4,032 shares
Latest Disclosed Value $ 4,017,974
Avidian Wealth Solutions, LLC reports 81.79% increase in ownership of COST / Costco Wholesale Corporation

On May 7, 2026 - Avidian Wealth Solutions, LLC filed a 13F-HR form disclosing ownership of 4,032 shares of Costco Wholesale Corporation (MX:COST) valued at $4,017,974 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 2,218 shares of Costco Wholesale Corporation. This represents a change in shares of 81.79% 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 4,032 1,814 81.79 4,018 110.09 0.1271
2026-02-02 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 2,218 443 24.96 1,913 16.37 0.0696
2025-10-30 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 1,775 107 6.41 1,643 -0.48 0.0619
2025-07-30 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 1,668 -49 -2.85 1,651 1.73 0.0671
2025-04-25 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 1,717 -192 -10.06 1,624 -7.15 0.0723
2025-01-29 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 1,909 62 3.36 1,749 6.78 0.0786
2024-10-30 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 1,847 103 5.91 1,638 10.46 0.0743
2024-08-06 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 1,744 139 8.66 1,482 26.13 0.0616
2024-05-03 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 1,605 378 30.81 1,176 45.06 0.0570
2024-02-06 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 1,227 51 4.34 810 21.99 0.0498
2023-10-13 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 1,176 -54 -4.39 665 0.45 0.0468
2023-08-03 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 1,230 -1,771 -59.01 662 -55.64 0.0433
2023-05-08 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 3,001 774 34.76 1,491 46.65 0.0818
2023-02-06 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 2,227 72 3.34 1,017 -0.20 0.0662
2022-11-03 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 2,155 1 0.05 1,018 -1.36 0.0736
2022-07-29 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 2,154 156 7.81 1,032 -10.34 0.0730
2022-05-10 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 1,998 504 33.73 1,151 35.73 0.0705
2022-02-14 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 1,494 56 3.89 848 31.27 0.0528
2021-11-10 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 1,438 21 1.48 646 15.15 0.0492
2021-08-09 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 1,417 -339 -19.31 561 -9.37 0.0430
2021-05-05 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 1,756 -36 -2.01 619 -8.30 0.0527
2021-02-09 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 1,792 121 7.24 675 13.83 0.0640
2021-02-03 2020-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 1,671 -41 -2.39 593 14.26 0.0672
2020-11-06 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 1,671 -41 593 137,353.0924
2020-08-10 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 1,712 -7 -0.41 519 5.92 0.0700
2020-04-22 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 1,719 116 7.24 490 4.03 0.0786
2020-02-13 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 1,603 -10 -0.62 471 1.29 0.0669
2019-11-14 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 1,613 81 5.29 465 14.81 0.0766
2019-08-14 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 1,532 0 0.00 405 9.16 0.0958
2019-05-15 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 1,532 -220 -12.56 371 3.92 0.0825
2019-02-14 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 1,752 -1 -0.06 357 -13.35 0.1246
2018-11-14 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 1,753 449 34.43 412 50.92 0.1289
2018-08-14 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 1,304 0 0.00 273 10.98 0.0862
2018-05-15 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 1,304 0 0.00 246 1.23 0.0825
2018-02-14 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 1,304 0 0.00 243 13.55 0.0650
2017-11-14 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 1,304 0 0.00 214 2.39 0.0816
2017-08-14 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 1,304 0 0.00 209 -4.57 0.0869
2017-05-15 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 1,304 -30 -2.25 219 2.34 0.0839
2017-02-14 2016-12-31 13F COSTCO WHSL CORP COM 22160K105 1,334 1,334 0.00 214 0.0932
2016-11-14 2016-09-30 13F COSTCO WHSL CORP COM 22160K105 0 -1,323 -100.00 0 -100.00
2016-08-15 2016-06-30 13F COSTCO WHSL CORP COM 22160K105 1,323 -53 -3.85 208 -4.15 0.0757
2016-05-16 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 1,376 72 5.52 217 2.84 0.1164
2016-02-12 2015-12-31 13F COSTCO WHSL CORP COM 22160K105 1,304 1,304 211 0.1030
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.