Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionSonata Capital Group Inc
Latest Disclosed Ownership1,818 shares
Latest Disclosed Value $ 1,811,510
Sonata Capital Group Inc reports 2.31% decrease in ownership of COST / Costco Wholesale Corporation

On April 30, 2026 - Sonata Capital Group Inc filed a 13F-HR form disclosing ownership of 1,818 shares of Costco Wholesale Corporation (MX:COST) valued at $1,811,510 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 1,861 shares of Costco Wholesale Corporation. This represents a change in shares of -2.31% 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.

Upgrade to unlock premium data and export to Excel .

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 1,818 -43 -2.31 1,812 12.91 0.6682
2026-01-26 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 1,861 0 0.00 1,605 160,300.00 0.5796
2025-11-12 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 1,861 -16 -0.85 2 0.00 0.6363
2025-07-30 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 1,877 98 5.51 2 0.00 0.7424
2025-04-29 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 1,779 -15 -0.84 2 0.00 0.7326
2025-01-29 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 1,794 62 3.58 2 0.00 0.6807
2024-11-01 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 1,732 0 0.00 2 0.00 0.6487
2024-07-29 2024-06-30 13F COSTCO WHOLESALE COM 22160K105 1,732 -5 -0.29 1 0.00 0.7555
2024-04-30 2024-03-31 13F COSTCO WHOLESALE COM 22160K105 1,737 98 5.98 1 0.00 0.5793
2024-02-07 2023-12-31 13F COSTCO WHOLESALE COM 22160K105 1,639 0 0.00 1 0.5383
2023-11-07 2023-09-30 13F COSTCO WHOLESALE COM 22160K105 1,639 0 0.00 1 0.4943
2023-08-04 2023-06-30 13F COSTCO WHOLESALE COM 22160K105 1,639 0 0.00 1 0.4559
2023-05-08 2023-03-31 13F COSTCO WHOLESALE COM 22160K105 1,639 0 0.00 1 0.4403
2023-02-08 2022-12-31 13F COSTCO WHOLESALE COM 22160K105 1,639 0 0.00 1 -100.00 0.4158
2022-10-25 2022-09-30 13F COSTCO WHOLESALE COM 22160K105 1,639 0 0.00 774 -1.53 0.4265
2022-08-03 2022-06-30 13F COSTCO WHOLESALE COM 22160K105 1,639 0 0.00 786 -16.74 0.4082
2022-04-22 2022-03-31 13F COSTCO WHOLESALE COM 22160K105 1,639 0 0.00 944 1.51 0.4167
2022-02-11 2021-12-31 13F COSTCO WHOLESALE COM 22160K105 1,639 -100 -5.75 930 19.08 0.3895
2021-11-08 2021-09-30 13F COSTCO WHOLESALE COM 22160K105 1,739 -2,512 -59.09 781 -53.57 0.3501
2021-08-05 2021-06-30 13F COSTCO WHOLESALE COM 22160K105 4,251 -123 -2.81 1,682 9.08 0.7649
2021-05-03 2021-03-31 13F COSTCO WHOLESALE COM 22160K105 4,374 -209 -4.56 1,542 -10.71 0.7399
2021-01-29 2020-12-31 13F COSTCO WHOLESALE COM 22160K105 4,583 0 0.00 1,727 6.15 0.8537
2020-10-29 2020-09-30 13F COSTCO WHOLESALE COM 22160K105 4,583 -415 -8.30 1,627 7.39 0.9488
2020-08-03 2020-06-30 13F COSTCO WHOLESALE COM 22160K105 4,998 200 4.17 1,515 10.75 0.9605
2020-04-27 2020-03-31 13F COSTCO WHOLESALE COM 22160K105 4,798 432 9.89 1,368 6.63 1.0294
2020-01-30 2019-12-31 13F COSTCO WHOLESALE COM 22160K105 4,366 -85 -1.91 1,283 0.08 0.7747
2019-11-01 2019-09-30 13F COSTCO WHOLESALE COM 22160K105 4,451 0 0.00 1,282 9.01 0.8688
2019-08-05 2019-06-30 13F COSTCO WHOLESALE COM 22160K105 4,451 0 0.00 1,176 9.09 0.8142
2019-04-23 2019-03-31 13F COSTCO WHOLESALE COM 22160K105 4,451 0 0.00 1,078 18.85 0.8027
2019-01-30 2018-12-31 13F COSTCO WHOLESALE COM 22160K105 4,451 -25 -0.56 907 -13.70 0.7392
2018-10-31 2018-09-30 13F COSTCO WHOLESALE COM 22160K105 4,476 0 0.00 1,051 12.41 0.7127
2018-08-01 2018-06-30 13F COSTCO WHOLESALE COM 22160K105 4,476 -23 -0.51 935 10.26 0.6716
2018-04-25 2018-03-31 13F COSTCO WHOLESALE COM 22160K105 4,499 0 0.00 848 1.31 0.6216
2018-01-29 2017-12-31 13F COSTCO WHOLESALE COM 22160K105 4,499 30 0.67 837 14.03 0.6040
2017-11-02 2017-09-30 13F COSTCO WHOLESALE COM 22160K105 4,469 -277 -5.84 734 -3.29 0.5457
2017-08-01 2017-06-30 13F COSTCO WHOLESALE COM 22160K105 4,746 56 1.19 759 -3.44 0.5658
2017-04-28 2017-03-31 13F COSTCO WHOLESALE COM 22160K105 4,690 0 0.00 786 4.66 0.5924
2017-01-20 2016-12-31 13F COSTCO WHOLESALE COM 22160K105 4,690 0 0.00 751 5.03 0.5851
2016-10-28 2016-09-30 13F COSTCO WHOLESALE COM 22160K105 4,690 0 0.00 715 -2.99 0.5817
2016-07-27 2016-06-30 13F COSTCO WHOLESALE COM 22160K105 4,690 -750 -13.79 737 -14.00 0.6280
2016-04-26 2016-03-31 13F COSTCO WHOLESALE COM 22160K105 5,440 0 0.00 857 -2.50 0.7421
2016-02-02 2015-12-31 13F COSTCO WHOLESALE COM 22160K105 5,440 0 0.00 879 11.83 0.7722
2015-11-02 2015-09-30 13F COSTCO WHOLESALE COM 22160K105 5,440 0 0.00 786 6.94 0.7297
2015-08-06 2015-06-30 13F COSTCO WHOLESALE COM 22160K105 5,440 -200 -3.55 735 -13.93 0.6313
2015-05-01 2015-03-31 13F COSTCO WHOLESALE COM 22160K105 5,640 0 0.00 854 6.88 0.7498
2015-02-12 2014-12-31 13F COSTCO WHSL CORP COM 22160K105 5,640 5,640 799 0.7244
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.