Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
Institution360 Financial, Inc.
Latest Disclosed Ownership2,712 shares
Latest Disclosed Value $ 2,702,382
360 Financial, Inc. reports 0.04% increase in ownership of COST / Costco Wholesale Corporation

On May 7, 2026 - 360 Financial, Inc. filed a 13F-HR form disclosing ownership of 2,712 shares of Costco Wholesale Corporation (MX:COST) valued at $2,702,382 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 13, 2026 disclosing 2,711 shares of Costco Wholesale Corporation. This represents a change in shares of 0.04% 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 2,712 1 0.04 2,702 15.62 0.8144
2026-02-13 2025-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 2,711 180 7.11 2,338 -0.21 0.7064
2026-02-10 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 2,531 0 2,343 0.7536
2025-11-12 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 2,531 -11 -0.43 2,343 -6.92 0.7536
2025-08-06 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 2,542 103 4.22 2,516 9.06 0.7942
2025-05-08 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 2,439 349 16.70 2,307 20.47 0.8349
2025-02-14 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 2,090 0 0.00 1,915 3.35 0.6924
2024-11-14 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 2,090 172 8.97 1,853 13.68 0.6845
2024-08-09 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 1,918 257 15.47 1,630 34.05 0.6162
2024-05-13 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 1,661 5 0.30 1,217 11.25 0.4732
2024-02-13 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 1,656 81 5.14 1,093 21.58 0.4824
2023-11-14 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 1,575 -99 -5.91 900 -0.22 0.5598
2023-08-11 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 1,674 10 0.60 901 9.08 0.4662
2023-04-11 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 1,664 -7 -0.42 827 4.69 0.4365
2023-02-10 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 1,671 0 0.00 789 0.00 0.5127
2022-10-19 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 1,671 -274 -14.09 789 -23.40 0.5139
2022-08-04 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 1,945 24 1.25 1,030 -6.79 0.6205
2022-04-11 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 1,921 -10 -0.52 1,105 0.82 0.5331
2022-01-18 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 1,931 -15 -0.77 1,096 25.40 0.5000
2021-10-13 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 1,946 -153 -7.29 874 5.17 0.4513
2021-08-03 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 2,099 -81 -3.72 831 8.20 0.4318
2021-04-28 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 2,180 81 3.86 768 -2.91 0.4322
2021-02-09 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 2,099 49 2.39 791 8.65 0.4702
2020-11-09 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 2,050 -35 -1.68 728 10.47 0.5137
2020-07-15 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 2,085 81 4.04 659 15.41 0.5468
2020-04-17 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 2,004 435 27.72 571 16.06 0.5989
2020-02-28 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 1,569 1,569 492 0.3628
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.