Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionVectors Research Management, LLC
Latest Disclosed Ownership263 shares
Latest Disclosed Value $ 262,061
Vectors Research Management, LLC ownership in COST / Costco Wholesale Corporation

On May 5, 2026 - Vectors Research Management, LLC filed a 13F-HR form disclosing ownership of 263 shares of Costco Wholesale Corporation (MX:COST) valued at $262,061 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 0 shares of Costco Wholesale Corporation.

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)
2026-05-05 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 263 263 262 0.0765
2026-02-03 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 0 -260 -100.00 0 -100.00
2025-10-28 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 260 260 241 0.0758
2022-11-08 2022-09-30 13F Costco Wholesale COM 22160K105 0 -181 -100.00 0 -100.00
2022-08-12 2022-06-30 13F Costco Wholesale COM 22160K105 181 0 0.00 87 -16.35 0.0221
2022-05-16 2022-03-31 13F Costco Wholesale COM 22160K105 181 0 0.00 104 0.97 0.0228
2022-02-15 2021-12-31 13F Costco Wholesale COM 22160K105 181 69 61.61 103 106.00 0.0217
2021-11-12 2021-09-30 13F Costco Wholesale COM 22160K105 112 -38 -25.33 50 -15.25 0.0118
2021-08-09 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 150 -80 -34.78 59 -27.16 0.0150
2021-05-18 2021-03-31 13F Costco Wholesale COM 22160K105 230 0 0.00 81 -6.90 0.0223
2021-02-09 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 230 -25 -9.80 87 -4.40 0.0267
2020-11-16 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 255 0 0.00 91 18.18 0.0333
2020-08-13 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 255 0 0.00 77 5.48 0.0304
2020-05-14 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 255 0 0.00 73 -2.67 0.0347
2020-02-14 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 255 0 0.00 75 2.74 0.0302
2019-11-15 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 255 100 64.52 73 78.05 0.0359
2019-08-12 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 155 0 0.00 41 7.89 0.0222
2019-07-15 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 155 0 0.00 38 18.75 0.0215
2019-02-12 2018-12-31 13F COSTCO WHOLESALE ORD COM 22160K105 155 0 0.00 32 0.00 0.0153
2018-11-14 2018-09-30 13F COSTCO WHOLESALE ORD COM 22160K105 155 155 32 0.0197
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.