Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionMonument Capital Management
Latest Disclosed Ownership964 shares
Latest Disclosed Value $ 960,520
Monument Capital Management reports 20.35% increase in ownership of COST / Costco Wholesale Corporation

On April 15, 2026 - Monument Capital Management filed a 13F-HR form disclosing ownership of 964 shares of Costco Wholesale Corporation (MX:COST) valued at $960,520 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 801 shares of Costco Wholesale Corporation. This represents a change in shares of 20.35% 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)
2026-04-15 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 964 163 20.35 961 39.13 0.2407
2026-01-26 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 801 -6 -0.74 691 -7.51 0.1718
2025-10-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 807 -2 -0.25 747 -6.75 0.1867
2025-07-24 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 809 -41 -4.82 801 -0.37 0.2086
2025-04-25 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 850 27 3.28 804 6.50 0.2471
2025-01-31 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 823 -18 -2.14 754 1.21 0.2080
2024-10-15 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 841 40 4.99 746 9.40 0.2063
2024-07-22 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 801 68 9.28 681 26.82 0.2004
2024-04-19 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 733 5 0.69 537 11.88 0.1548
2024-02-01 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 728 200 37.88 481 61.07 0.1547
2023-10-25 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 528 42 8.64 298 14.18 0.1002
2023-07-18 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 486 45 10.20 262 19.18 0.0835
2023-04-21 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 441 441 219 0.0734
2022-11-07 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 0 -561 -100.00 0 -100.00
2022-07-20 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 561 -27 -4.59 269 -20.65 0.1015
2022-04-14 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 588 588 339 0.1099
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.