Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionOld North State Trust, LLC
Latest Disclosed Ownership4,118 shares
Latest Disclosed Value $ 4,103
Old North State Trust, LLC reports 2.77% increase in ownership of COST / Costco Wholesale Corporation

On May 13, 2026 - Old North State Trust, LLC filed a 13F-HR form disclosing ownership of 4,118 shares of Costco Wholesale Corporation (MX:COST) valued at $4,103 USD as of March 31, 2026. The entity filed a previous 13F-HR on March 24, 2026 disclosing 4,007 shares of Costco Wholesale Corporation. This represents a change in shares of 2.77% 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)
2026-05-13 2026-03-31 13F Costco Wholesale COM 22160K105 4,118 111 2.77 4 33.33 2.4366
2026-03-24 2025-12-31 13F Costco Wholesale COM 22160K105 4,007 908 29.30 3 50.00 2.0432
2025-11-20 2025-09-30 13F Costco Wholesale COM 22160K105 3,099 337 12.20 3 0.00 1.7474
2025-08-18 2025-06-30 13F Costco Wholesale COM 22160K105 2,762 240 9.52 3 0.00 1.8684
2025-06-23 2025-03-31 13F Costco Wholesale COM 22160K105 2,522 0 0.00 2 0.00 1.4703
2025-03-10 2024-12-31 13F Costco Wholesale COM 22160K105 2,522 223 9.70 2 0.00 1.4703
2024-11-29 2024-09-30 13F Costco Wholesale COM 22160K105 2,299 26 1.14 2 100.00 1.6567
2024-08-19 2024-06-30 13F Costco Wholesale COM 22160K105 2,273 77 3.51 2 0.00 1.6683
2024-05-15 2024-03-31 13F Costco Wholesale COM 22160K105 2,196 116 5.58 2 0.00 1.3597
2023-11-15 2023-09-30 13F COSTCO WHOLESALE COM 22160K105 2,080 52 2.56 1 0.00 0.9156
2023-08-22 2023-06-30 13F Costco Wholesale COM 22160K105 2,028 7 0.35 1 0.00 0.8070
2023-05-24 2023-03-31 13F/A-1 Costco Wholesale COM 22160K105 2,021 58 2.95 1 0.6950
2023-05-23 2023-03-31 13F COSTCO WHOLESALE COM 22160K105 98,392 96,429 1 0.6975
2023-02-14 2022-12-31 13F COSTCO WHOLESALE COM 22160K105 1,963 35 1.82 1 -100.00 0.5890
2022-11-08 2022-09-30 13F Costco Wholesale COM 22160K105 1,928 1,926 96,300.00 911 2.24 0.7872
2022-08-12 2022-06-30 13F COSTCO WHOLESALE COM 22160K105 2 0 0.00 891 -15.30 0.8147
2022-05-02 2022-03-31 13F COSTCO WHOLESALE COM 22160K105 2 -1,700 -99.88 1,052 8.90 0.8423
2022-01-25 2021-12-31 13F COSTCO WHOLESALE COM 22160K105 1,702 -585 -25.58 966 -6.03 0.6936
2021-11-02 2021-09-30 13F Costco Wholesale COM 22160K105 2,287 40 1.78 1,028 15.64 0.9165
2021-07-28 2021-06-30 13F Costco Wholesale COM 22160K105 2,247 -92 -3.93 889 7.76 0.6717
2021-05-12 2021-03-31 13F COSTCO WHOLESALE COM 22160K105 2,339 65 2.86 825 -3.73 0.6524
2021-02-08 2020-12-31 13F COSTCO WHOLESALE COM 22160K105 2,274 260 12.91 857 19.86 0.6629
2020-10-13 2020-09-30 13F COSTCO WHOLESALE COM 22160K105 2,014 -38 -1.85 715 14.95 0.4814
2020-07-10 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 2,052 50 2.50 622 8.93 0.3969
2020-05-15 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 2,002 188 10.36 571 7.13 0.4127
2020-02-21 2019-12-31 13F CIGNA CORP COM 22160K105 1,814 -14 -0.77 533 1.14 0.2875
2019-10-09 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 1,828 62 3.51 527 12.85 0.3573
2019-07-16 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 1,766 84 4.99 467 14.74 0.3384
2019-04-10 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 1,682 310 22.59 407 45.88 0.2840
2019-02-08 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 1,372 162 13.39 279 -1.76 0.2851
2019-02-08 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 1,210 1,210 284 0.2681
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.