Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionLarson Financial Group LLC
Latest Disclosed Ownership14,766 shares
Latest Disclosed Value $ 14,713,635
Larson Financial Group LLC reports 11.88% increase in ownership of COST / Costco Wholesale Corporation

On May 15, 2026 - Larson Financial Group LLC filed a 13F-HR form disclosing ownership of 14,766 shares of Costco Wholesale Corporation (MX:COST) valued at $14,713,635 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 13,198 shares of Costco Wholesale Corporation. This represents a change in shares of 11.88% 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)
2026-05-15 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 14,766 1,568 11.88 14,714 29.28 0.4411
2026-02-06 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 13,198 2,402 22.25 11,381 13.90 0.3786
2025-11-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 10,796 917 9.28 9,993 2.18 0.3494
2025-08-08 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 9,879 726 7.93 9,780 12.97 0.3914
2025-05-02 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 9,153 236 2.65 8,657 5.95 0.4102
2025-02-07 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 8,917 322 3.75 8,171 7.23 0.4223
2024-11-12 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 8,595 4,252 97.90 7,619 106.42 0.4321
2024-08-02 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 4,343 1,990 84.57 3,691 114.22 0.2516
2024-05-03 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 2,353 228 10.73 1,724 22.90 0.1332
2024-02-01 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 2,125 103 5.09 1,403 22.77 0.1225
2023-11-03 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 2,022 -54 -2.60 1,143 2.24 0.1124
2023-08-03 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 2,076 -60 -2.81 1,118 5.28 0.1117
2023-05-04 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 2,136 950 80.10 1,061 96.12 0.1153
2023-02-03 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 1,186 0 0.00 541 -3.39 0.0648
2022-11-03 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 1,186 35 3.04 560 1.45 0.0797
2022-08-04 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 1,151 55 5.02 552 -12.52 0.0955
2022-05-05 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 1,096 -7 -0.63 631 0.80 0.1008
2022-02-03 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 1,103 15 1.38 626 28.02 0.0993
2021-11-04 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 1,088 991 1,021.65 489 1,186.84 0.0970
2021-08-10 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 97 -3 -3.00 38 8.57 0.0088
2021-05-06 2021-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 100 -69 -40.83 35 -44.44 0.0103
2021-04-08 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 169 0 63 0.0214
2021-01-14 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 169 5 3.05 63 8.62 0.0214
2020-10-08 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 164 -17 -9.39 58 5.45 0.0238
2020-07-10 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 181 109 151.39 55 175.00 0.0261
2020-04-09 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 72 37 105.71 20 100.00 0.0125
2020-01-10 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 35 10 40.00 10 42.86 0.0058
2019-10-11 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 25 0 0.00 7 0.00 0.0046
2019-07-16 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 25 0 0.00 7 16.67 0.0052
2019-04-05 2019-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 25 -2 -7.41 6 20.00 0.0048
2019-04-04 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 27 0 5 0.0046
2019-02-07 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 27 27 5 0.0046
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.