Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionPrinciple Wealth Partners Llc
Latest Disclosed Ownership6,205 shares
Latest Disclosed Value $ 6,182,845
Principle Wealth Partners Llc reports 0.72% decrease in ownership of COST / Costco Wholesale Corporation

On May 7, 2026 - Principle Wealth Partners Llc filed a 13F-HR form disclosing ownership of 6,205 shares of Costco Wholesale Corporation (MX:COST) valued at $6,182,845 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 6,250 shares of Costco Wholesale Corporation. This represents a change in shares of -0.72% 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 6,205 -45 -0.72 6,183 14.72 0.3533
2026-02-06 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 6,250 241 4.01 5,389 -3.11 0.3032
2025-11-03 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 6,009 -34 -0.56 5,563 -7.02 0.3229
2025-07-30 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 6,043 498 8.98 5,983 14.07 0.3737
2025-05-06 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 5,545 -190 -3.31 5,245 -0.21 0.3749
2025-01-29 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 5,735 16 0.28 5,255 3.67 0.3688
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 5,719 -37 -0.64 5,070 3.62 0.3591
2024-08-13 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 5,756 12 0.21 4,892 16.28 0.3723
2024-04-23 2024-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 5,744 -120 -2.05 4,208 8.71 0.3286
2024-04-23 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 5,744 -120 4,208 0.3286
2024-02-05 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 5,864 23 0.39 3,870 17.31 0.3332
2023-11-01 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 5,841 -64 -1.08 3,300 3.77 0.3316
2023-07-31 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 5,905 50 0.85 3,179 9.32 0.3195
2023-05-10 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 5,855 71 1.23 2,909 10.15 0.3110
2023-02-02 2022-12-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 5,784 -9 -0.16 2,640 -3.51 0.2992
2022-11-14 2022-09-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 5,793 227 4.08 2,736 2.59 0.2580
2022-08-02 2022-06-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 5,566 56 1.02 2,667 -15.95 0.3209
2022-05-12 2022-03-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 5,510 -100 -1.78 3,173 -0.38 0.3337
2022-02-11 2021-12-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 5,610 47 0.84 3,185 27.40 0.3344
2021-11-16 2021-09-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 5,563 -213 -3.69 2,500 9.41 0.2887
2021-08-13 2021-06-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 5,776 -55 -0.94 2,285 11.19 0.2595
2021-05-18 2021-03-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 5,831 255 4.57 2,055 -2.19 0.2403
2021-02-16 2020-12-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 5,576 4,456 397.86 2,101 427.89 0.2768
2020-11-16 2020-09-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,120 53 4.97 398 22.84 0.1109
2020-08-14 2020-06-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,067 17 1.62 324 8.36 0.0951
2020-05-13 2020-03-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,050 -336 -24.24 299 -26.54 0.1122
2020-02-04 2019-12-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,386 0 0.00 407 2.01 0.1300
2019-11-05 2019-09-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,386 186 15.50 399 25.87 0.1379
2019-11-05 2019-06-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,200 -350 -22.58 317 -15.47 0.1631
2019-10-30 2019-03-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,550 0 0.00 375 18.67 0.2145
2019-10-10 2018-12-31 13F COSTCO WHOLESALE Com 22160K105 1,550 1,550 316 0.2652
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.