Costco Wholesale Corporation
DE ˙ XTRA ˙ US22160K1051
843,00 € ↑27,00 (3,31%)
2026-06-04
DEL PRIS
SecurityDE:CTO / Costco Wholesale Corporation
InstitutionGreenline Partners, LLC
Latest Disclosed Ownership2,763 shares
Latest Disclosed Value $ 2,753,136
Greenline Partners, LLC reports 6.56% decrease in ownership of CTO / Costco Wholesale Corporation

On May 15, 2026 - Greenline Partners, LLC filed a 13F-HR form disclosing ownership of 2,763 shares of Costco Wholesale Corporation (DE:CTO) valued at $2,400,771 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,957 shares of Costco Wholesale Corporation. This represents a change in shares of -6.56% during the quarter. The current value of the position is $2,329,209 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)
2026-05-15 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 2,763 -194 -6.56 2,753 8.00 0.2920
2026-02-17 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 2,957 20 0.68 2,550 -6.22 0.2917
2025-11-17 2025-09-30 13F COSTCO WHSL CORP NEW COM COM 22160K105 2,937 -30 -1.01 2,719 -7.46 0.3304
2025-08-14 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 2,967 30 1.02 2,937 5.76 0.3958
2025-05-15 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 2,937 15 0.51 2,778 3.74 0.4013
2025-02-14 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 2,922 -480 -14.11 2,677 -11.21 0.3747
2024-11-14 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 3,402 0 0.00 3,016 4.83 0.4316
2024-08-13 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 3,402 192 5.98 2,877 22.33 0.4378
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 3,210 0 0.00 2,352 11.00 0.3748
2024-02-14 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 3,210 0 0.00 2,119 16.82 0.3585
2023-11-06 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 3,210 -6,511 -66.98 1,814 -65.35 0.3417
2023-08-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 9,721 -1,431 -12.83 5,234 -5.56 0.9789
2023-05-15 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 11,152 -10 -0.09 5,541 8.75 1.0572
2023-02-14 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 11,162 -5,515 -33.07 5,095 -35.31 1.0055
2022-11-15 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 16,677 -38 -0.23 7,876 -1.69 1.7949
2022-08-15 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 16,715 289 1.76 8,011 -15.31 1.7285
2022-05-16 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 16,426 -4,108 -20.01 9,459 -18.86 1.7727
2022-02-15 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 20,534 181 0.89 11,657 27.45 2.1973
2021-11-15 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 20,353 289 1.44 9,146 15.20 1.9117
2021-08-16 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 20,064 -283 -1.39 7,939 10.69 1.6247
2021-05-14 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 20,347 751 3.83 7,172 -2.86 1.5707
2021-02-16 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 19,596 -69 -0.35 7,383 5.76 1.6919
2020-11-16 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 19,665 11,493 140.64 6,981 181.83 1.7760
2020-08-13 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 8,172 5,092 165.32 2,477 332.29 0.6555
2018-06-21 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 3,080 3,080 573 0.1902
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.