Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionFirst Bank & Trust
Latest Disclosed Ownership7,916 shares
Latest Disclosed Value $ 7,887,740
First Bank & Trust reports 9.86% decrease in ownership of COST / Costco Wholesale Corporation

On April 10, 2026 - First Bank & Trust filed a 13F-HR form disclosing ownership of 7,916 shares of Costco Wholesale Corporation (MX:COST) valued at $7,887,740 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 12, 2026 disclosing 8,782 shares of Costco Wholesale Corporation. This represents a change in shares of -9.86% 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)
2026-04-10 2026-03-31 13F Costco Whsl Equities 22160K105 7,916 -866 -9.86 7,888 4.15 0.9776
2026-01-12 2025-12-31 13F Costco Whsl Equities 22160K105 8,782 4,902 126.34 7,573 110.89 1.2336
2025-10-10 2025-09-30 13F Costco Whsl Equities 22160K105 3,880 -72 -1.82 3,591 -8.21 0.6044
2025-07-09 2025-06-30 13F Costco Whsl Equities 22160K105 3,952 -155 -3.77 3,912 0.72 0.6977
2025-04-28 2025-03-31 13F Costco Whsl Equities 22160K105 4,107 0 0.00 3,884 3.22 0.7519
2025-02-03 2024-12-31 13F Costco Whsl Equities 22160K105 4,107 -55 -1.32 3,763 2.01 0.7223
2024-10-24 2024-09-30 13F Costco Whsl Equities 22160K105 4,162 30 0.73 3,690 5.04 0.7000
2024-07-09 2024-06-30 13F Costco Whsl Equities 22160K105 4,132 -9 -0.22 3,512 15.79 0.7153
2024-04-17 2024-03-31 13F Costco Whsl Equities 22160K105 4,141 -36 -0.86 3,034 10.01 0.6271
2024-01-12 2023-12-31 13F Costco Whsl Equities 22160K105 4,177 1 0.02 2,757 16.87 0.6656
2023-10-11 2023-09-30 13F Costco Whsl Equities 22160K105 4,176 -41 -0.97 2,359 3.92 0.6178
2023-07-12 2023-06-30 13F Costco Whsl Equities 22160K105 4,217 548 14.94 2,270 24.52 0.5754
2023-04-25 2023-03-31 13F Costco Whsl Equities 22160K105 3,669 74 2.06 1,823 182,200.00 0.4821
2023-01-27 2022-12-31 13F Costco Whsl Equities 22160K105 3,595 674 23.07 2 -99.93 0.4557
2022-10-28 2022-09-30 13F Costco Whsl Equities 22160K105 2,921 258 9.69 1,380 8.15 0.5068
2022-07-22 2022-06-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,663 448 20.23 1,276 0.08 0.4152
2022-04-29 2022-03-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,215 214 10.69 1,275 12.33 0.2839
2022-02-01 2021-12-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,001 11 0.55 1,135 26.96 0.4774
2021-10-18 2021-09-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 1,990 27 1.38 894 15.06 0.4084
2021-08-10 2021-06-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 1,963 -36 -1.80 777 10.21 0.3750
2021-04-14 2021-03-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 1,999 317 18.85 705 11.20 0.3549
2021-01-27 2020-12-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 1,682 -719 -29.95 634 -25.59 0.4014
2020-10-26 2020-09-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,401 -7 -0.29 852 16.71 0.5658
2020-08-05 2020-06-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,408 63 2.69 730 9.12 0.5493
2020-04-14 2020-03-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,345 155 7.08 669 3.88 0.6023
2020-01-31 2019-12-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,190 -149 -6.37 644 -4.45 0.4688
2019-10-17 2019-09-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,339 -69 -2.87 674 5.97 0.5082
2019-07-26 2019-06-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,408 -210 -8.02 636 0.32 0.5071
2019-04-15 2019-03-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,618 -470 -15.22 634 0.79 0.4944
2019-01-28 2018-12-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 3,088 0 0.00 629 -12.64 0.5339
2018-10-10 2018-09-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 3,088 0 0.00 720 11.63 0.5417
2018-07-31 2018-06-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 3,088 223 7.78 645 19.44 0.4950
2018-04-20 2018-03-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,865 73 2.61 540 3.85 0.4336
2018-01-18 2017-12-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,792 -35 -1.24 520 12.07 0.4095
2017-10-25 2017-09-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 2,827 -702 -19.89 464 -17.73 0.3782
2017-07-31 2017-06-30 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 3,529 -5,005 -58.65 564 -60.59 0.4778
2017-04-27 2017-03-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 8,534 -35 -0.41 1,431 4.30 1.2359
2017-01-19 2016-12-31 13F COSTCO WHSL CORP NEW COM COMMON STOCK 22160K105 8,569 8,569 1,372 1.2524
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.