Costco Wholesale Corporation
AT ˙ WBAG ˙ US22160K1051
840,50 € ↑15,20 (1,84%)
2026-06-04
PREZZO DELLE AZIONI
SecurityAT:COST / Costco Wholesale Corporation
InstitutionWeil Company, Inc.
Latest Disclosed Ownership862 shares
Latest Disclosed Value $ 858,788
Weil Company, Inc. reports 2.38% increase in ownership of COST / Costco Wholesale Corporation

On April 15, 2026 - Weil Company, Inc. filed a 13F-HR form disclosing ownership of 862 shares of Costco Wholesale Corporation (AT:COST) valued at $743,044 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 842 shares of Costco Wholesale Corporation. This represents a change in shares of 2.38% during the quarter. The current value of the position is $724,511 USD.

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 862 20 2.38 859 18.34 0.1928
2026-01-14 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 842 0 0.00 726 -6.93 0.1669
2025-11-07 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 842 -2 -0.24 779 -6.71 0.1875
2025-08-07 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 844 2 0.24 835 4.90 0.2203
2025-04-30 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 842 10 1.20 796 4.46 0.2375
2025-02-05 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 832 20 2.46 762 5.98 0.2637
2024-11-04 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 812 0 0.00 720 4.35 0.2359
2024-08-05 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 812 39 5.05 690 21.73 0.2518
2024-05-03 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 773 30 4.04 566 15.51 0.2247
2024-02-09 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 743 0 0.00 490 16.95 0.2154
2023-11-08 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 743 0 0.00 420 4.75 0.2086
2023-08-08 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 743 100 15.55 400 25.39 0.1781
2023-05-08 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 643 -37 -5.44 319 2.90 0.1449
2023-02-08 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 680 -60 -8.11 310 -11.43 0.1413
2022-11-09 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 740 97 15.09 350 13.64 0.2149
2022-08-05 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 643 -93 -12.64 308 -27.36 0.1733
2022-05-06 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 736 -817 -52.61 424 -51.93 0.2131
2022-02-10 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 1,553 834 115.99 882 173.07 0.4114
2021-11-12 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 719 0 0.00 323 13.73 0.1680
2021-07-20 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 719 0 0.00 284 12.25 0.1435
2021-05-12 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 719 0 0.00 253 -6.64 0.1432
2021-02-10 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 719 100 16.16 271 23.18 0.1622
2020-11-12 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 619 619 220 0.1603
2020-08-13 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 0 -719 -100.00 0 -100.00
2020-05-15 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 719 -40 -5.27 205 -8.07 0.1927
2020-02-13 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 759 19 2.57 223 4.69 0.1704
2019-11-13 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 740 740 213 0.1582
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.