Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionGradient Investments LLC
Latest Disclosed Ownership25,309 shares
Latest Disclosed Value $ 25,218,167
Gradient Investments LLC reports 10.71% decrease in ownership of COST / Costco Wholesale Corporation

On April 13, 2026 - Gradient Investments LLC filed a 13F-HR form disclosing ownership of 25,309 shares of Costco Wholesale Corporation (MX:COST) valued at $25,218,167 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 28,345 shares of Costco Wholesale Corporation. This represents a change in shares of -10.71% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-13 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 25,309 -3,036 -10.71 25,218 3.17 0.3907
2026-01-08 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 28,345 2,005 7.61 24,443 0.25 0.3880
2025-10-06 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 26,340 1,806 7.36 24,381 0.39 0.4071
2025-07-08 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 24,534 -717 -2.84 24,287 1.70 0.4440
2025-04-09 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 25,251 3,903 18.28 23,882 22.09 0.4817
2025-01-21 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 21,348 -2,314 -9.78 19,561 -6.75 0.3961
2024-10-15 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 23,662 -2,922 -10.99 20,977 -7.17 0.4371
2024-07-18 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 26,584 2,316 9.54 22,596 27.09 0.5074
2024-04-23 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 24,268 -2,547 -9.50 17,779 0.45 0.4123
2024-01-18 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 26,815 2,322 9.48 17,700 27.91 0.4280
2023-10-27 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 24,493 1,677 7.35 13,838 12.65 0.3652
2023-07-11 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 22,816 1,666 7.88 12,284 16.89 0.3163
2023-04-17 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 21,150 4,728 28.79 10,509 40.18 0.2865
2023-01-10 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 16,422 1,405 9.36 7,497 5.70 0.2363
2022-10-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 15,017 -323 -2.11 7,092 -3.54 0.2169
2022-07-11 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 15,340 -6,160 -28.65 7,352 -40.62 0.2146
2022-05-26 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 21,500 -2,004 -8.53 12,381 -7.21 0.3181
2022-01-12 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 23,504 -904 -3.70 13,343 21.65 0.3383
2021-10-18 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 24,408 -1,750 -6.69 10,968 5.97 0.3073
2021-07-12 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 26,158 1,406 5.68 10,350 18.64 0.3029
2021-04-21 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 24,752 12,816 107.37 8,724 105.90 0.2837
2021-01-08 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 11,936 -80 -0.67 4,237 -0.68 0.1798
2020-10-06 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 12,016 2,072 20.84 4,266 41.49 0.1792
2020-07-10 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 9,944 1,138 12.92 3,015 20.07 0.1375
2020-04-07 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 8,806 1,428 19.35 2,511 15.77 0.1353
2020-01-15 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 7,378 -620 -7.75 2,169 -5.86 0.0966
2019-10-10 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 7,998 1,213 17.88 2,304 28.50 0.1129
2019-07-16 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 6,785 4,943 268.35 1,793 302.02 0.0920
2019-04-11 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 1,842 710 62.72 446 93.07 0.0288
2019-01-18 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 1,132 381 50.73 231 31.25 0.0139
2018-10-11 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 751 25 3.44 176 15.79 0.0090
2018-08-09 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 726 0 0.00 152 10.95 0.0081
2018-04-10 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 726 470 183.59 137 185.42 0.0074
2018-02-07 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 256 256 48 0.0028
2017-10-16 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 0 -243 -100.00 0 -100.00
2017-07-19 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 243 -556 -69.59 39 -70.90 0.0027
2017-04-11 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 799 0 0.00 134 4.69 0.0103
2017-01-17 2016-12-31 13F COSTCO WHSL CORP COM 22160K105 799 561 235.71 128 255.56 0.0112
2016-10-11 2016-09-30 13F COSTCO WHSL CORP COM 22160K105 238 -100 -29.59 36 -32.08 0.0035
2016-07-14 2016-06-30 13F COSTCO WHSL CORP COM 22160K105 338 100 42.02 53 39.47 0.0057
2016-04-13 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 238 29 13.88 38 11.76 0.0047
2016-01-19 2015-12-31 13F COSTCO WHSL CORP COM 22160K105 209 150 254.24 34 277.78 0.0045
2015-10-14 2015-09-30 13F COSTCO WHSL CORP COM 22160K105 59 0 0.00 9 12.50 0.0013
2015-08-25 2015-06-30 13F COSTCO WHSL CORP COM 22160K105 59 59 8 0.0011
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.