Costco Wholesale Corporation
AT ˙ WBAG ˙ US22160K1051
€ 855,00 ↑14.50 (1.73%)
2026-06-05
PREÇO DA AÇÃO
SecurityAT:COST / Costco Wholesale Corporation
InstitutionDDD Partners, LLC
Latest Disclosed Ownership25,821 shares
Latest Disclosed Value $ 25,728,974
DDD Partners, LLC reports 0.34% decrease in ownership of COST / Costco Wholesale Corporation

On April 28, 2026 - DDD Partners, LLC filed a 13F-HR form disclosing ownership of 25,821 shares of Costco Wholesale Corporation (AT:COST) valued at $22,257,702 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 22, 2026 disclosing 25,910 shares of Costco Wholesale Corporation. This represents a change in shares of -0.34% during the quarter. The current value of the position is $22,076,955 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 25,821 -89 -0.34 25,729 15.15 1.7738
2026-01-22 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 25,910 -56 -0.22 22,343 -7.04 1.4220
2025-11-06 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 25,966 127 0.49 24,035 -6.04 1.5269
2025-07-31 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 25,839 29 0.11 25,579 4.79 2.7424
2025-05-02 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 25,810 -337 -1.29 24,411 1.89 2.9658
2025-01-31 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 26,147 -2,192 -7.73 23,958 -4.64 2.9441
2024-11-12 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 28,339 -95 -0.33 25,123 3.95 2.7280
2024-08-01 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 28,434 -475 -1.64 24,169 14.11 2.8022
2024-05-09 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 28,909 134 0.47 21,180 11.51 2.5885
2024-01-18 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 28,775 -48 -0.17 18,994 16.89 2.5531
2023-10-18 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 28,823 -226 -0.78 16,250 3.90 2.3436
2023-08-02 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 29,049 -42 -0.14 15,640 8.20 2.1652
2023-05-15 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 29,091 12 0.04 14,455 8.89 2.2531
2023-02-14 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 29,079 156 0.54 13,275 -2.83 2.1233
2022-11-09 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 28,923 10 0.03 13,660 -1.42 2.4778
2022-08-03 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 28,913 -185 -0.64 13,857 -17.30 2.4032
2022-05-05 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 29,098 236 0.82 16,756 2.26 2.2939
2022-01-24 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 28,862 2 0.01 16,385 26.35 2.2462
2021-10-22 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 28,860 -50 -0.17 12,968 13.37 1.9401
2021-08-04 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 28,910 -30 -0.10 11,439 12.14 1.7375
2021-05-03 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 28,940 -110 -0.38 10,201 -6.80 1.7395
2021-02-09 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 29,050 97 0.34 10,945 6.49 2.1580
2020-10-28 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 28,953 0 0.00 10,278 17.07 2.6704
2020-07-23 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 28,953 -38 -0.13 8,779 6.21 2.5167
2020-04-28 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 28,991 974 3.48 8,266 0.38 2.8682
2020-02-03 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 28,017 -2,083 -6.92 8,235 -5.04 2.2732
2019-11-09 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 30,100 522 1.76 8,672 10.95 2.6633
2019-08-01 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 29,578 -1,013 -3.31 7,816 5.52 2.4981
2019-05-08 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 30,591 0 0.00 7,407 18.85 2.5461
2019-02-14 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 30,591 -195 -0.63 6,232 -13.82 2.3273
2018-11-07 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 30,786 -47 -0.15 7,231 12.23 2.5665
2018-08-10 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 30,833 813 2.71 6,443 13.89 2.6199
2018-05-04 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 30,020 -454 -1.49 5,657 -0.26 2.2785
2018-02-09 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 30,474 30,474 5,672 2.2054
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.