Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionFinancial Insights, Inc.
Latest Disclosed Ownership2,603 shares
Latest Disclosed Value $ 2,593,707
Financial Insights, Inc. reports 1.80% increase in ownership of COST / Costco Wholesale Corporation

On May 19, 2026 - Financial Insights, Inc. filed a 13F-HR form disclosing ownership of 2,603 shares of Costco Wholesale Corporation (MX:COST) valued at $2,593,707 USD as of March 31, 2026. The entity filed a previous 13F-HR on April 1, 2026 disclosing 2,557 shares of Costco Wholesale Corporation. This represents a change in shares of 1.80% 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)
2026-05-19 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 2,603 46 1.80 2,594 17.60 0.8405
2026-04-01 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 2,557 68 2.73 2,205 -4.26 0.7390
2026-04-01 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 2,489 44 1.80 2,304 -4.83 0.7629
2025-07-22 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 2,445 -58 -2.32 2,420 2.24 0.8841
2025-04-25 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 2,503 157 6.69 2,367 10.14 0.9423
2025-03-05 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 2,346 -492 -17.34 2,150 -14.55 0.7979
2024-10-22 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 2,838 -1,700 -37.46 2,516 -34.79 0.7945
2024-07-16 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 4,538 7 0.15 3,857 16.21 1.0717
2024-04-25 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 4,531 -17 -0.37 3,320 10.56 0.9259
2024-01-25 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 4,548 74 1.65 3,002 21.49 0.9389
2023-12-07 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 4,474 -11 -0.25 2,472 2.36 0.8826
2024-01-25 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 4,485 85 1.93 2,415 10.43 0.8869
2023-04-18 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 4,400 -143 -3.15 2,186 5.45 0.8900
2023-02-10 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 4,543 661 17.03 2,074 13.09 0.9820
2022-10-27 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 3,882 1,850 91.04 1,833 88.19 1.2334
2022-08-03 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 2,032 -12 -0.59 974 -17.25 0.9885
2022-05-11 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 2,044 -10 -0.49 1,177 0.94 1.0815
2022-02-09 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 2,054 0 0.00 1,166 26.33 1.0061
2021-11-12 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 2,054 0 0.00 923 -88.64 0.8490
2021-08-12 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 2,054 -100 -4.64 8,127 970.75 0.6730
2021-05-12 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 2,154 176 8.90 759 1.88 0.5604
2021-02-05 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 1,978 0 0.00 745 6.13 0.5772
2020-11-16 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 1,978 -20,058 -91.02 702 18.18 0.5975
2020-08-20 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 22,036 20,078 1,025.43 594 6.45 0.5274
2020-04-28 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 1,958 114 6.18 558 2.95 0.5880
2020-02-07 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 1,844 28 1.54 542 3.63 0.4753
2019-10-31 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 1,816 0 0.00 523 6.09 0.5010
2019-08-20 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 1,816 0 0.00 493 10.54 0.5004
2019-05-23 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 1,816 -268 -12.86 446 -0.22 0.4648
2019-03-08 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 2,084 2,084 447 0.4991
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.