Costco Wholesale Corporation
US ˙ NasdaqGS ˙ US22160K1051

SecurityCOST / Costco Wholesale Corporation
InstitutionTempus Wealth Planning, LLC
Latest Disclosed Ownership1,993 shares
Latest Disclosed Value $ 1,985,632
Tempus Wealth Planning, LLC reports 3.48% increase in ownership of COST / Costco Wholesale Corporation

On April 28, 2026 - Tempus Wealth Planning, LLC filed a 13F-HR form disclosing ownership of 1,993 shares of Costco Wholesale Corporation (US:COST) valued at $1,985,885 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 1,926 shares of Costco Wholesale Corporation. This represents a change in shares of 3.48% during the quarter. The current value of the position is $1,936,937 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)
2026-04-28 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 1,993 67 3.48 1,986 19.58 0.4562
2026-01-16 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 1,926 56 2.99 1,661 -4.05 0.3805
2025-11-06 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 1,870 -108 -5.46 1,731 -11.64 0.3972
2025-07-17 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 1,978 80 4.21 1,958 9.08 0.4880
2025-05-06 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 1,898 139 7.90 1,795 11.42 0.5363
2025-01-24 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 1,759 108 6.54 1,612 10.04 0.4923
2024-10-22 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 1,651 181 12.31 1,464 17.21 0.5363
2024-07-25 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 1,470 92 6.68 1,250 23.79 0.5221
2024-04-19 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 1,378 133 10.68 1,010 22.90 0.4442
2024-01-24 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 1,245 -32 -2.51 822 13.87 0.3608
2023-11-01 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 1,277 83 6.95 721 12.31 0.3617
2023-07-21 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 1,194 -34 -2.77 643 5.25 0.2900
2023-05-08 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 1,228 -126 -9.31 610 -1.29 0.2982
2023-02-10 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 1,354 -311 -18.68 618 -21.37 0.3755
2022-11-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 1,665 868 108.91 786 105.76 0.5242
2022-08-05 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 797 82 11.47 382 -7.28 0.3141
2022-05-06 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 715 -1,247 -63.56 412 -63.02 0.2930
2022-02-02 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 1,962 20 1.03 1,114 27.61 0.6010
2021-11-09 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 1,942 44 2.32 873 16.25 0.4944
2021-08-12 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 1,898 1,898 751 0.4983
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.