Costco Wholesale Corporation
AT ˙ WBAG ˙ US22160K1051
855,00 € ↑14,50 (1,73%)
2026-06-05
CENA AKCJI
SecurityAT:COST / Costco Wholesale Corporation
InstitutionAvenir Corp
Latest Disclosed Ownership500 shares
Latest Disclosed Value $ 498,215
Avenir Corp ownership in COST / Costco Wholesale Corporation

On May 14, 2026 - Avenir Corp filed a 13F-HR form disclosing ownership of 500 shares of Costco Wholesale Corporation (AT:COST) valued at $431,000 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 500 shares of Costco Wholesale Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $427,500 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)
2026-05-14 2026-03-31 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 498 15.55 0.0607
2026-02-13 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 431 -6.71 0.0468
2025-11-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 463 -6.48 0.0482
2025-08-14 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 495 4.66 0.0509
2025-05-14 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 473 3.06 0.0496
2025-02-13 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 458 3.39 0.0469
2024-11-14 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 443 4.48 0.0447
2024-08-14 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 425 15.85 0.0413
2024-05-16 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 366 10.91 0.0314
2024-02-14 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 330 17.02 0.0285
2023-11-14 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 282 4.83 0.0264
2023-08-11 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 269 8.47 0.0236
2023-05-15 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 500 0 0.00 248 8.77 0.0235
2023-02-14 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 500 -50 -9.09 228 -12.31 0.0229
2022-11-15 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 550 0 0.00 260 -1.52 0.0276
2022-08-11 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 550 0 0.00 264 -16.72 0.0252
2022-05-16 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 550 0 0.00 317 1.60 0.0253
2022-02-16 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 550 0 0.00 312 26.32 0.0240
2021-11-12 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 550 0 0.00 247 13.30 0.0208
2021-08-13 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 550 550 218 0.0173
2021-05-14 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 0 -550 -100.00 0 -100.00
2021-02-12 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 550 -25 -4.35 207 1.47 0.0198
2020-11-13 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 575 575 204 0.0213
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.