코스트코 도매공사
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionFirst National Trust Co
Latest Disclosed Ownership14,260 shares
Latest Disclosed Value $ 14,209,091
First National Trust Co reports 2.33% decrease in ownership of COST / Costco Wholesale Corporation

On May 7, 2026 - First National Trust Co filed a 13F-HR form disclosing ownership of 14,260 shares of Costco Wholesale Corporation (MX:COST) valued at $14,209,091 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 14,600 shares of Costco Wholesale Corporation. This represents a change in shares of -2.33% during the quarter.

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)
2026-05-07 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 14,260 -340 -2.33 14,209 12.86 0.4841
2026-02-09 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 14,600 -316 -2.12 12,590 -8.81 0.4199
2025-11-06 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 14,916 -1,104 -6.89 13,807 -12.94 0.4729
2025-08-01 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 16,020 -258 -1.58 15,859 3.01 0.5930
2025-05-08 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 16,278 -3,568 -17.98 15,395 -15.34 0.6203
2025-02-10 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 19,846 702 3.67 18,184 7.15 0.6827
2024-11-05 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 19,144 -41 -0.21 16,972 4.07 0.6559
2024-08-02 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 19,185 -325 -1.67 16,307 14.09 0.6710
2024-04-26 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 19,510 3,592 22.57 14,294 36.03 0.5804
2024-02-06 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 15,918 -2,331 -12.77 10,507 1.92 0.4613
2023-11-06 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 18,249 309 1.72 10,310 6.74 0.4920
2023-08-01 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 17,940 379 2.16 9,659 10.69 0.4474
2023-04-26 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 17,561 428 2.50 8,726 11.56 0.4641
2023-02-02 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 17,133 1,534 9.83 7,821 6.16 0.4135
2022-11-02 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 15,599 6,914 79.61 7,367 76.96 0.4295
2022-08-03 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 8,685 637 7.92 4,163 -10.16 0.2343
2022-05-03 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 8,048 367 4.78 4,634 6.26 0.2401
2022-02-03 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 7,681 301 4.08 4,361 31.51 0.2292
2021-11-05 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 7,380 82 1.12 3,316 14.86 0.1981
2021-08-06 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 7,298 -233 -3.09 2,887 8.74 0.1756
2021-05-06 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 7,531 50 0.67 2,655 -5.82 0.1739
2021-02-10 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 7,481 971 14.92 2,819 21.98 0.1945
2020-11-04 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 6,510 1,192 22.41 2,311 43.27 0.1798
2020-08-06 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 5,318 1,494 39.07 1,613 47.85 0.1363
2020-04-29 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 3,824 2 0.05 1,091 -2.85 0.1090
2020-02-04 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 3,822 -214 -5.30 1,123 -3.44 0.0912
2019-11-01 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 4,036 -45 -1.10 1,163 7.88 0.1044
2019-07-22 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 4,081 -41 -0.99 1,078 8.02 0.1005
2019-04-25 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 4,122 223 5.72 998 25.69 0.0998
2019-01-28 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 3,899 -8 -0.20 794 -13.41 0.0885
2018-10-31 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 3,907 -114 -2.84 917 9.04 0.0934
2018-07-30 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 4,021 181 4.71 841 16.32 0.0927
2018-04-30 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 3,840 -125 -3.15 723 -2.03 0.0824
2018-01-17 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 3,965 -118 -2.89 738 9.99 0.0812
2017-11-06 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 4,083 280 7.36 671 10.36 0.0778
2017-08-07 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 3,803 688 22.09 608 16.48 0.0743
2017-05-09 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 3,115 -338 -9.79 522 -5.43 0.0677
2017-01-30 2016-12-31 13F COSTCO WHSL CORP COM 22160K105 3,453 138 4.16 552 9.09 0.0778
2016-11-02 2016-09-30 13F COSTCO WHSL CORP COM 22160K105 3,315 51 1.56 506 -1.36 0.0762
2016-07-27 2016-06-30 13F COSTCO WHSL CORP COM 22160K105 3,264 -10 -0.31 513 -0.58 0.0787
2016-05-09 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 3,274 -73 -2.18 516 -4.62 0.0790
2016-02-03 2015-12-31 13F COSTCO WHSL CORP COM 22160K105 3,347 -28 -0.83 541 10.86 0.0856
2015-11-09 2015-09-30 13F COSTCO WHSL CORP COM 22160K105 3,375 -17 -0.50 488 6.32 0.0837
2015-07-20 2015-06-30 13F COSTCO WHSL CORP COM 22160K105 3,392 -148 -4.18 459 -14.37 0.0737
2015-05-08 2015-03-31 13F COSTCO WHSL CORP COM 22160K105 3,540 3,540 0.00 536 0.0916
2015-01-28 2014-12-31 13F COSTCO WHSL CORP COM 22160K105 0 -4,684 -100.00 0 -100.00
2014-11-06 2014-09-30 13F COSTCO WHSL CORP COM 22160K105 4,684 -18 -0.38 587 8.50 0.1110
2014-08-08 2014-06-30 13F COSTCO WHSL CORP COM 22160K105 4,702 380 8.79 541 12.01 0.1043
2014-05-07 2014-03-31 13F COSTCO WHSL CORP COM 22160K105 4,322 -150 -3.35 483 -9.21 0.0864
2014-02-04 2013-12-31 13F COSTCO WHSL CORP COM 22160K105 4,472 -545 -10.86 532 -7.96 0.0969
2013-12-17 2013-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 5,017 115 2.35 578 6.64 0.1132
2013-11-13 2013-09-30 13F COSTCO WHSL CORP COM 22160K105 5,017 578
2013-08-09 2013-06-30 13F COSTCO WHSL CORP COM 22160K105 4,902 4,902 542 0.1111
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.