Costco Wholesale Corporation
GB ˙ LSE ˙ US22160K1051
968,99 $ ↑7,98 (0,83%)
2026-06-04
DEL PRIS
SecurityGB:0I47 / Costco Wholesale Corporation
InstitutionMathes Company, Inc.
Latest Disclosed Ownership1,404 shares
Latest Disclosed Value $ 1,399
Mathes Company, Inc. reports 0.36% increase in ownership of 0I47 / Costco Wholesale Corporation

On May 8, 2026 - Mathes Company, Inc. filed a 13F-HR form disclosing ownership of 1,404 shares of Costco Wholesale Corporation (GB:0I47) valued at $1,395,520 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 1,399 shares of Costco Wholesale Corporation. This represents a change in shares of 0.36% during the quarter. The current value of the position is $1,360,462 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)
2026-05-08 2026-03-31 13F Costco Wholesale COM 22160K105 1,404 5 0.36 1 0.00 0.5111
2026-02-09 2025-12-31 13F Costco Wholesale COM 22160K105 1,399 0 0.00 1 0.00 0.4301
2025-11-12 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 1,399 0 0.00 1 0.00 0.4649
2025-08-05 2025-06-30 13F Costco Wholesale COM 22160K105 1,399 -7 -0.50 1 0.00 0.5138
2025-05-01 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 1,406 -1,068 -43.17 1 -50.00 0.5409
2025-01-31 2024-12-31 13F Costco Wholesale COM 22160K105 2,474 -30 -1.20 2 0.00 0.8273
2024-10-29 2024-09-30 13F Costco Wholesale COM 22160K105 2,504 -34 -1.34 2 0.00 0.7831
2024-08-12 2024-06-30 13F Costco Wholesale COM 22160K105 2,538 -16 -0.63 2 100.00 0.7830
2024-05-02 2024-03-31 13F Costco Wholesale COM 22160K105 2,554 150 6.24 2 0.00 0.7010
2024-01-30 2023-12-31 13F Costco Wholesale COM 22160K105 2,404 -50 -2.04 2 0.00 0.6539
2023-10-26 2023-09-30 13F Costco Wholesale COM 22160K105 2,454 185 8.15 1 0.00 0.6432
2023-07-25 2023-06-30 13F Costco Wholesale COM 22160K105 2,269 4 0.18 1 0.00 0.5347
2023-01-25 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 2,265 0 0.00 1 -99.91 0.5218
2022-10-18 2022-09-30 13F Costco Wholesale COM 22160K105 2,265 0 0.00 1,070 -1.47 0.5966
2022-08-01 2022-06-30 13F Costco Wholesale COM 22160K105 2,265 0 0.00 1,086 -16.72 0.5279
2022-06-15 2022-03-31 13F Costco Wholesale COM 22160K105 2,265 700 44.73 1,304 46.85 0.5055
2022-02-04 2021-12-31 13F Costco Wholesale COM 22160K105 1,565 -56 -3.45 888 21.98 0.3038
2021-10-29 2021-09-30 13F Costco Wholesale COM 22160K105 1,621 0 0.00 728 13.57 0.2701
2021-07-20 2021-06-30 13F Costco Wholesale COM 22160K105 1,621 0 0.00 641 12.26 0.2307
2021-04-28 2021-03-31 13F Costco Wholesale COM 22160K105 1,621 0 0.00 571 -6.55 0.2204
2021-01-20 2020-12-31 13F Costco Wholesale COM 22160K105 1,621 -550 -25.33 611 -20.75 0.2481
2020-10-26 2020-09-30 13F Costco Wholesale COM 22160K105 2,171 0 0.00 771 17.17 0.3592
2020-07-27 2020-06-30 13F Costco Wholesale COM 22160K105 2,171 0 0.00 658 6.30 0.3273
2020-04-21 2020-03-31 13F Costco Wholesale COM 22160K105 2,171 -100 -4.40 619 -7.20 0.4116
2020-01-30 2019-12-31 13F Costco Wholesale COM 22160K105 2,271 0 0.00 667 1.99 0.3115
2019-10-21 2019-09-30 13F Costco Wholesale COM 22160K105 2,271 171 8.14 654 17.84 0.3374
2019-07-29 2019-06-30 13F Costco Wholesale COM 22160K105 2,100 0 0.00 555 9.25 0.2939
2019-05-01 2019-03-31 13F Costco Wholesale COM 22160K105 2,100 0 0.00 508 18.69 0.2586
2019-01-29 2018-12-31 13F Costco Wholesale COM 22160K105 2,100 0 0.00 428 -13.18 0.2700
2018-10-31 2018-09-30 13F Costco Wholesale COM 22160K105 2,100 0 0.00 493 12.30 0.2302
2018-07-27 2018-06-30 13F Costco Wholesale COM 22160K105 2,100 0 0.00 439 10.86 0.2094
2018-04-27 2018-03-31 13F Costco Wholesale COM 22160K105 2,100 0 0.00 396 1.28 0.1849
2018-01-19 2017-12-31 13F Costco Wholesale COM 22160K105 2,100 0 0.00 391 13.33 0.1789
2017-10-20 2017-09-30 13F Costco Wholesale COM 22160K105 2,100 0 0.00 345 2.68 0.1625
2017-07-17 2017-06-30 13F Costco Wholesale COM 22160K105 2,100 -100 -4.55 336 -8.94 0.1608
2017-04-24 2017-03-31 13F Costco Wholesale COM 22160K105 2,200 0 0.00 369 4.83 0.1962
2017-01-27 2016-12-31 13F Costco Wholesale COM 22160K105 2,200 0 0.00 352 4.76 0.1939
2016-10-31 2016-09-30 13F Costco Wholesale COM 22160K105 2,200 -1,100 -33.33 336 -35.14 0.1905
2016-08-15 2016-06-30 13F Costco Wholesale COM 22160K105 3,300 -65 -1.93 518 -2.26 0.3022
2016-04-25 2016-03-31 13F Costco Wholesale COM 22160K105 3,365 0 0.00 530 -2.39 0.3182
2016-01-28 2015-12-31 13F Costco Wholesale COM 22160K105 3,365 65 1.97 543 13.84 0.3083
2015-11-03 2015-09-30 13F Costco Wholesale COM 22160K105 3,300 -250 -7.04 477 -0.42 0.3148
2015-07-31 2015-06-30 13F Costco Wholesale COM 22160K105 3,550 0 0.00 479 -10.97 0.2559
2015-04-24 2015-03-31 13F Costco Wholesale COM 22160K105 3,550 3,550 538 0.2760
2015-01-29 2014-12-31 13F Costco Wholesale COM 22160K105 0 -2,450 -100.00 0 -100.00
2014-10-27 2014-09-30 13F Costco Wholesale COM 22160K105 2,450 -800 -24.62 307 -17.91 0.1546
2014-08-05 2014-06-30 13F Costco Wholesale COM 22160K105 3,250 50 1.56 374 4.76 0.1849
2014-04-24 2014-03-31 13F Costco Wholesale COM 22160K105 3,200 0 0.00 357 -6.30 0.1913
2014-01-30 2013-12-31 13F Costco Wholesale COM 22160K105 3,200 860 36.75 381 41.64 0.2046
2013-10-28 2013-09-30 13F Costco Wholesale COM 22160K105 2,340 -419 -15.19 269 -11.80 0.2563
2013-07-30 2013-06-30 13F Costco Wholesale COM 22160K105 2,759 2,759 305 0.3317
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.