Costco Wholesale Corporation
US ˙ NasdaqGS ˙ US22160K1051

SecurityCOST / Costco Wholesale Corporation
InstitutionClarius Group, LLC
Latest Disclosed Ownership7,078 shares
Latest Disclosed Value $ 6,103,723
Clarius Group, LLC reports 2.64% decrease in ownership of COST / Costco Wholesale Corporation

On January 14, 2026 - Clarius Group, LLC filed a 13F-HR form disclosing ownership of 7,078 shares of Costco Wholesale Corporation (US:COST) valued at $6,103,643 USD as of December 31, 2025. The entity filed a previous 13F-HR on October 14, 2025 disclosing 7,270 shares of Costco Wholesale Corporation. This represents a change in shares of -2.64% during the quarter. The current value of the position is $6,807,833 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)
2026-01-14 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 7,078 -192 -2.64 6,104 -9.30 0.3485
2025-10-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 7,270 -1,313 -15.30 6,729 -20.80 0.3984
2025-07-22 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 8,583 -78 -0.90 8,497 3.72 0.4953
2025-04-18 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 8,661 1,284 17.41 8,191 21.19 0.5144
2025-01-16 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 7,377 -362 -4.68 6,759 -1.36 0.4617
2024-10-09 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 7,739 -583 -7.01 6,852 -3.12 0.4807
2024-07-11 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 8,322 -120 -1.42 7,074 14.36 0.5015
2024-04-17 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 8,442 2,137 33.89 6,185 48.64 0.4271
2024-01-29 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 6,305 -2,853 -31.15 4,162 -19.56 0.3451
2023-10-19 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 9,158 -849 -8.48 5,174 -3.97 0.4931
2023-08-10 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 10,007 39 0.39 5,388 8.78 0.4164
2023-04-17 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 9,968 -240 -2.35 4,953 123,700.00 0.4206
2023-01-25 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 10,208 -1,753 -14.66 5 -99.93 0.4197
2022-10-24 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 11,961 78 0.66 5,649 -0.81 0.5647
2022-08-10 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 11,883 555 4.90 5,695 -11.44 0.5683
2022-04-08 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 11,328 0 0.00 6,431 0.00 0.5088
2022-02-02 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 11,328 140 1.25 6,431 27.93 0.5088
2021-10-18 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 11,188 85 0.77 5,027 14.43 0.4503
2021-08-06 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 11,103 72 0.65 4,393 12.99 0.3943
2021-04-27 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 11,031 -71 -0.64 3,888 -7.05 0.3809
2021-01-15 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 11,102 2,572 30.15 4,183 38.14 0.4508
2020-10-09 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 8,530 53 0.63 3,028 17.82 0.3890
2020-07-08 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 8,477 406 5.03 2,570 11.69 0.3602
2020-04-24 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 8,071 104 1.31 2,301 -4.01 0.4340
2020-01-22 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 7,967 -52 -0.65 2,397 3.77 0.3796
2019-10-22 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 8,019 636 8.61 2,310 18.40 0.4238
2019-08-02 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 7,383 710 10.64 1,951 20.73 0.3923
2019-05-14 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 6,673 1,495 28.87 1,616 53.18 0.3931
2019-02-09 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 5,178 146 2.90 1,055 -10.74 0.3833
2018-11-13 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 5,032 -127 -2.46 1,182 9.65 0.4187
2018-08-06 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 5,159 532 11.50 1,078 23.62 0.4474
2018-05-14 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 4,627 0 0.00 872 1.28 0.3978
2018-02-09 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 4,627 -495 -9.66 861 2.38 0.3843
2017-11-07 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 5,122 -552 -9.73 841 -7.28 0.3541
2017-08-11 2017-06-30 13F COSTCO COM 22160K105 5,674 1 0.02 907 -4.63 0.3738
2017-05-04 2017-03-31 13F COSTCO COM 22160K105 5,673 0 0.00 951 4.74 0.3927
2017-02-14 2016-12-31 13F/A-1 COSTCO COM 22160K105 5,673 14 0.25 908 5.21 0.3840
2017-02-07 2016-12-31 13F COSTCO COM 22160K105 5,087 908
2016-11-14 2016-09-30 13F COSTCO COM 22160K105 5,659 -57 -1.00 863 -3.79 0.4024
2016-08-12 2016-06-30 13F COSTCO COM 22160K105 5,716 595 11.62 897 11.29 0.4781
2016-05-10 2016-03-31 13F COSTCO COM 22160K105 5,121 0 0.00 806 -2.54 0.4468
2016-05-10 2015-12-31 13F/A-1 COSTCO CORPO COM 22160K105 5,121 5,121 827 0.4794
2016-02-16 2015-12-31 13F COSTCO COM 22160K105 5,121 827
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.