Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionSmartleaf Asset Management LLC
Latest Disclosed Ownership10,031 shares
Latest Disclosed Value $ 9,997,301
Smartleaf Asset Management LLC reports 6.26% increase in ownership of COST / Costco Wholesale Corporation

On May 15, 2026 - Smartleaf Asset Management LLC filed a 13F-HR form disclosing ownership of 10,031 shares of Costco Wholesale Corporation (MX:COST) valued at $9,997,301 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 9,440 shares of Costco Wholesale Corporation. This represents a change in shares of 6.26% 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 10,031 591 6.26 9,997 22.33 0.3611
2026-02-13 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 9,440 2,105 28.70 8,172 21.52 0.3097
2025-11-05 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 7,335 1,330 22.15 6,725 13.67 0.4161
2025-08-14 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 6,005 -254 -4.06 5,916 1.67 0.5213
2025-05-14 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 6,259 379 6.45 5,819 7.30 0.5616
2025-02-05 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 5,880 890 17.84 5,423 22.72 0.5529
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 4,990 860 20.82 4,420 25.79 0.5364
2024-10-08 2024-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,130 1,136 37.94 3,513 60.34 0.5758
2024-08-13 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 4,130 1,136 3,513 0.5758
2024-10-07 2024-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 2,994 1,045 53.62 2,192 70.64 0.4240
2024-05-03 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 2,994 1,045 1,442 0.3470
2024-02-12 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 1,949 1,949 1,284 0.3436
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.