Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionLegacy Private Trust Co.
Latest Disclosed Ownership8,655 shares
Latest Disclosed Value $ 8,624,101
Legacy Private Trust Co. reports 3.75% decrease in ownership of COST / Costco Wholesale Corporation

On April 7, 2026 - Legacy Private Trust Co. filed a 13F-HR form disclosing ownership of 8,655 shares of Costco Wholesale Corporation (MX:COST) valued at $8,624,101 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 8,992 shares of Costco Wholesale Corporation. This represents a change in shares of -3.75% 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)
2026-04-07 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 8,655 -337 -3.75 8,624 11.22 0.2935
2026-01-08 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 8,992 -129 -1.41 7,754 -8.15 0.4550
2025-10-08 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 9,121 1,118 13.97 8,443 6.56 0.5033
2025-07-08 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 8,003 95 1.20 7,922 5.92 0.5118
2025-04-04 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 7,908 -543 -6.43 7,479 -3.41 0.5141
2025-01-08 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 8,451 -179 -2.07 7,743 1.22 0.5066
2024-10-07 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 8,630 -324 -3.62 7,651 0.53 0.5143
2024-07-12 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 8,954 -340 -3.66 7,611 11.76 0.5407
2024-04-10 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 9,294 -304 -3.17 6,809 7.48 0.4978
2024-01-10 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 9,598 -24 -0.25 6,335 16.54 0.5037
2023-10-11 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 9,622 -92 -0.95 5,436 3.96 0.4680
2023-07-07 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 9,714 -352 -3.50 5,230 4.56 0.4324
2023-04-12 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 10,066 1,198 13.51 5,001 23.54 0.4265
2023-01-19 2022-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 8,868 1,571 21.53 4,048 17.47 0.3659
2023-01-06 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 8,868 1,571 4 0.2069
2022-10-06 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 7,297 6,172 548.62 3,446 539.33 0.3270
2022-07-07 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 1,125 -65 -5.46 539 -21.31 0.0483
2022-04-11 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 1,190 89 8.08 685 9.60 0.0532
2022-01-12 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 1,101 0 0.00 625 26.26 0.0469
2021-10-12 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 1,101 0 0.00 495 13.53 0.0401
2021-07-09 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 1,101 -146 -11.71 436 -0.91 0.0368
2021-04-09 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 1,247 110 9.67 440 2.80 0.0397
2021-01-12 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 1,137 -36 -3.07 428 2.88 0.0404
2020-10-14 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 1,173 -94 -7.42 416 8.33 0.0430
2020-07-09 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 1,267 101 8.66 384 15.66 0.0423
2020-04-23 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 1,166 29 2.55 332 -0.60 0.0431
2020-01-14 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 1,137 0 0.00 334 1.83 0.0349
2019-10-10 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 1,137 0 0.00 328 9.33 0.0367
2019-07-18 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 1,137 -40 -3.40 300 5.26 0.0341
2019-04-11 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 1,177 36 3.16 285 22.84 0.0338
2019-01-16 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 1,141 0 0.00 232 -13.43 0.0300
2018-10-10 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 1,141 1,141 268 0.0303
2016-07-13 2016-06-30 13F COSTCO WHSL CORP COM 22160K105 0 -2,080 -100.00 0 -100.00
2016-04-21 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 2,080 -725 -25.85 328 -27.59 0.0495
2016-01-12 2015-12-31 13F COSTCO WHSL CORP COM 22160K105 2,805 -635 -18.46 453 -8.85 0.0689
2015-10-09 2015-09-30 13F COSTCO WHSL CORP COM 22160K105 3,440 0 0.00 497 6.88 0.0785
2015-07-15 2015-06-30 13F COSTCO WHSL CORP COM 22160K105 3,440 -300 -8.02 465 -17.99 0.0701
2015-04-13 2015-03-31 13F COSTCO WHSL CORP COM 22160K105 3,740 0 0.00 567 6.98 0.0832
2015-01-16 2014-12-31 13F COSTCO WHSL CORP COM 22160K105 3,740 0 0.00 530 13.01 0.0777
2014-10-14 2014-09-30 13F COSTCO WHSL CORP COM 22160K105 3,740 0 0.00 469 8.82 0.0716
2014-07-18 2014-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 3,740 3,740 431 0.0666
2014-07-15 2014-06-30 13F COSTCO WHSL CORP COM 22160K105 3,740 3,740 431 0.0683
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.