Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionManchester Financial Inc
Latest Disclosed Ownership2,930 shares
Latest Disclosed Value $ 2,919,177
Manchester Financial Inc reports 32.54% decrease in ownership of COST / Costco Wholesale Corporation

On April 23, 2026 - Manchester Financial Inc filed a 13F-HR form disclosing ownership of 2,930 shares of Costco Wholesale Corporation (MX:COST) valued at $2,919,177 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 4,343 shares of Costco Wholesale Corporation. This represents a change in shares of -32.54% 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)
2026-04-23 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 2,930 -1,413 -32.54 2,919 -22.06 0.5603
2026-02-12 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 4,343 -520 -10.69 3,745 -16.80 0.7003
2025-10-15 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 4,863 -598 -10.95 4,502 -16.74 0.8988
2025-07-29 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 5,461 -901 -14.16 5,406 -10.15 1.1314
2025-05-13 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 6,362 -409 -6.04 6,017 -3.01 1.3554
2025-01-30 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 6,771 -110 -1.60 6,204 1.70 1.3579
2024-10-24 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 6,881 -175 -2.48 6,100 1.72 1.3229
2024-07-17 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 7,056 -24 -0.34 5,998 15.62 1.4761
2024-04-18 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 7,080 -101 -1.41 5,187 9.45 1.3528
2024-01-25 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 7,181 -21 -0.29 4,740 16.47 1.3243
2023-11-06 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 7,202 -141 -1.92 4,069 2.93 1.1956
2023-07-28 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 7,343 -51 -0.69 3,953 7.62 1.1216
2023-04-19 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 7,394 10 0.14 3,674 8.99 1.0637
2023-02-08 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 7,384 -31 -0.42 3,371 -3.77 0.9120
2022-11-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 7,415 -6 -0.08 3,502 -1.55 1.0077
2022-07-28 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 7,421 -1,270 -14.61 3,557 -28.93 1.3768
2022-05-04 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 8,691 285 3.39 5,005 4.88 1.7979
2022-02-03 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 8,406 -251 -2.90 4,772 22.67 1.6741
2021-10-28 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 8,657 -206 -2.32 3,890 10.92 1.4891
2021-07-21 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 8,863 30 0.34 3,507 12.66 1.3866
2021-05-03 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 8,833 26 0.30 3,113 -6.18 1.4424
2021-01-26 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 8,807 -325 -3.56 3,318 2.34 2.0608
2020-10-15 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 9,132 -182 -1.95 3,242 14.80 2.4631
2020-07-13 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 9,314 -253 -2.64 2,824 3.52 2.2928
2020-04-20 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 9,567 -822 -7.91 2,728 -10.67 2.0138
2020-01-17 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 10,389 -622 -5.65 3,054 -3.72 1.1962
2019-10-09 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 11,011 -249 -2.21 3,172 6.59 1.3913
2019-07-23 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 11,260 -51 -0.45 2,976 8.65 1.3382
2019-04-30 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 11,311 -72 -0.63 2,739 18.11 1.3280
2019-02-14 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 11,383 11,383 2,319 1.2535
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.