Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionSalomon & Ludwin, LLC
Latest Disclosed Ownership512 shares
Latest Disclosed Value $ 519,660
Salomon & Ludwin, LLC reports 20.47% increase in ownership of COST / Costco Wholesale Corporation

On May 11, 2026 - Salomon & Ludwin, LLC filed a 13F-HR form disclosing ownership of 512 shares of Costco Wholesale Corporation (MX:COST) valued at $519,660 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 425 shares of Costco Wholesale Corporation. This represents a change in shares of 20.47% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-11 2026-03-31 13F COSTCO WHSL CORP COM 22160K105 512 87 20.47 520 39.52 0.0464
2026-01-28 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 425 -132 -23.70 372 -26.92 0.0329
2025-10-21 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 557 106 23.50 510 14.90 0.0459
2025-07-29 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 451 0 0.00 443 3.99 0.0438
2025-04-28 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 451 99 28.12 427 32.30 0.0455
2025-01-30 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 352 -413 -53.99 323 -52.51 0.0342
2024-10-24 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 765 21 2.82 678 7.28 0.0691
2024-07-25 2024-06-30 13F COSTCO WHOLESALE COM 22160K105 744 -245 -24.77 632 -12.71 0.0706
2024-05-02 2024-03-31 13F COSTCO WHOLESALE COM 22160K105 989 78 8.56 725 40.86 0.0623
2024-02-07 2023-12-31 13F COSTCO WHOLESALE COM 22160K105 911 0 0.00 515 0.00 0.0537
2023-11-14 2023-09-30 13F COSTCO WHOLESALE COM 22160K105 911 0 0.00 515 4.90 0.0537
2023-07-24 2023-06-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 911 0 0.00 490 8.41 0.0522
2023-04-28 2023-03-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 911 0 0.00 453 8.92 0.0540
2023-02-08 2022-12-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 911 -20 -2.15 416 -5.68 0.0527
2022-11-03 2022-09-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 931 931 440 0.0660
2019-08-20 2019-06-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 0 -20 -100.00 0 -100.00
2019-05-14 2019-03-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 20 -280 -93.33 5 -91.80 0.0010
2019-02-13 2018-12-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 300 300 61 0.0141
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.