Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionWeaver Consulting Group
Latest Disclosed Ownership1,460 shares
Latest Disclosed Value $ 1,454,661
Weaver Consulting Group reports 0.07% increase in ownership of COST / Costco Wholesale Corporation

On May 15, 2026 - Weaver Consulting Group filed a 13F-HR form disclosing ownership of 1,460 shares of Costco Wholesale Corporation (MX:COST) valued at $1,454,661 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,459 shares of Costco Wholesale Corporation. This represents a change in shares of 0.07% 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)
2026-05-15 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 1,460 1 0.07 1,455 15.58 0.3467
2026-02-10 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 1,459 14 0.97 1,258 -5.91 0.3076
2025-11-12 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 1,445 -60 -3.99 1,337 -10.21 0.3403
2025-08-12 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 1,505 19 1.28 1,490 5.98 0.4120
2025-04-28 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 1,486 55 3.84 1,405 7.17 0.4233
2025-01-08 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 1,431 -165 -10.34 1,311 -7.35 0.4033
2024-11-14 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 1,596 -3 -0.19 1,415 4.12 0.4497
2024-07-12 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 1,599 0 0.00 1,359 16.05 0.4743
2024-04-16 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 1,599 -183 -10.27 1,172 -0.43 0.4336
2024-01-22 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 1,782 3 0.17 1,176 17.01 0.4782
2023-10-13 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 1,779 0 0.00 1,005 5.02 0.4540
2023-07-19 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 1,779 4 0.23 958 8.63 0.4227
2023-04-11 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 1,775 -15 -0.84 882 7.83 0.4040
2023-01-09 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 1,790 885 97.79 817 91.33 0.4169
2022-10-04 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 905 227 33.48 427 31.38 0.2451
2022-07-20 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 678 24 3.67 325 -13.79 0.1817
2022-05-06 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 654 10 1.55 377 3.01 0.1828
2022-02-01 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 644 14 2.22 366 29.33 0.1762
2021-10-28 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 630 6 0.96 283 14.57 0.1537
2021-07-06 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 624 624 247 0.1391
2021-01-29 2020-12-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 0 -516 -100.00 0 -100.00
2020-10-28 2020-09-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 516 -31 -5.67 183 10.24 0.1054
2020-07-24 2020-06-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 547 40 7.89 166 14.48 0.0966
2020-04-28 2020-03-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 507 -996 -66.27 145 -66.51 0.0946
2020-01-31 2019-12-31 13F COSTCO WHSL CORP NEW COM Stock 22160K105 1,503 1,052 233.26 433 243.65 0.2318
2019-11-22 2019-09-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 451 100 28.49 126 35.48 0.0667
2019-08-05 2019-06-30 13F COSTCO WHSL CORP NEW COM Stock 22160K105 351 0 0.00 93 3.33 0.0507
2019-06-19 2019-03-31 13F COSTCO WHSL CORP Common Stock 22160K105 351 351 90 0.0254
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.