Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionStephens Inc /ar/
Latest Disclosed Ownership15,771 shares
Latest Disclosed Value $ 15,910,495
Stephens Inc /ar/ reports 1.02% decrease in ownership of COST / Costco Wholesale Corporation

On April 28, 2026 - Stephens Inc /ar/ filed a 13F-HR form disclosing ownership of 15,771 shares of Costco Wholesale Corporation (MX:COST) valued at $15,910,495 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 15,933 shares of Costco Wholesale Corporation. This represents a change in shares of -1.02% 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)
2026-04-28 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 15,771 -162 -1.02 15,910 14.38 0.1990
2026-02-05 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 15,933 1,012 6.78 13,911 0.05 0.1731
2025-10-27 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 14,921 -111 -0.74 13,903 -6.57 0.1772
2025-07-29 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 15,032 -136 -0.90 14,881 3.74 0.2045
2025-05-01 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 15,168 -395 -2.54 14,346 0.60 0.2102
2025-01-28 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 15,563 166 1.08 14,260 4.47 0.1999
2024-10-28 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 15,397 538 3.62 13,650 8.08 0.1936
2024-08-06 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 14,859 -2 -0.01 12,630 16.00 0.1927
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 14,861 172 1.17 10,887 12.29 0.1688
2024-02-13 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 14,689 440 3.09 9,696 20.43 0.1672
2023-11-14 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 14,249 -2,107 -12.88 8,050 -8.57 0.1543
2023-08-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 16,356 135 0.83 8,806 9.26 0.1584
2023-05-15 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 16,221 44 0.27 8,060 9.14 0.1546
2023-02-14 2022-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 16,177 -251 -1.53 7,385 -4.82 0.1513
2023-01-25 2022-12-31 13F COSTCO WHSL CORP OM 22160K105 16,177 -251 7 0.1513
2022-11-02 2022-09-30 13F COSTCO WHSL CORP OM 22160K105 16,428 -1,194 -6.78 7,758 -8.15 0.1657
2022-08-03 2022-06-30 13F COSTCO WHSL CORP OM 22160K105 17,622 -1,062 -5.68 8,446 -21.50 0.1704
2022-05-04 2022-03-31 13F COSTCO WHSL CORP OM 22160K105 18,684 -1,025 -5.20 10,759 -3.84 0.1754
2022-03-07 2021-12-31 13F COSTCO WHSL CORP OM 22160K105 19,709 -935 -4.53 11,189 20.62 0.1693
2021-10-27 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 20,644 -1,214 -5.55 9,276 7.26 0.1435
2021-08-12 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 21,858 470 2.20 8,648 14.71 0.1295
2021-05-14 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 21,388 -4,174 -16.33 7,539 -21.72 0.1238
2021-02-10 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 25,562 -879 -3.32 9,631 2.60 0.1728
2020-11-13 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 26,441 1,583 6.37 9,387 24.55 0.1848
2020-08-24 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 24,858 1,873 8.15 7,537 15.00 0.1620
2020-05-14 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 22,985 -6,805 -22.84 6,554 -25.15 0.1745
2020-02-14 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 29,790 -27 -0.09 8,756 1.92 0.1834
2019-10-18 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 29,817 -4,252 -12.48 8,591 -4.58 0.1890
2019-08-01 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 34,069 2 0.01 9,003 9.14 0.2039
2019-05-03 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 34,067 -189 -0.55 8,249 18.21 0.1957
2019-02-11 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 34,256 -1,779 -4.94 6,978 -17.56 0.1980
2018-11-14 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 36,035 -8,031 -18.22 8,464 -8.09 0.2106
2018-08-10 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 44,066 314 0.72 9,209 11.71 0.2783
2018-05-03 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 43,752 -2,289 -4.97 8,244 -3.79 0.3074
2018-02-05 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 46,041 3,664 8.65 8,569 23.08 0.3206
2017-11-08 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 42,377 -838 -1.94 6,962 0.74 0.2515
2017-08-10 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 43,215 -1,190 -2.68 6,911 -7.19 0.2371
2017-05-11 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 44,405 1,350 3.14 7,446 8.02 0.2707
2017-02-09 2016-12-31 13F COSTCO WHSL CORP COM 22160K105 43,055 4,613 12.00 6,893 17.57 0.2810
2016-11-30 2016-09-30 13F/A-2 COSTCO WHSL CORP COM 22160K105 38,442 -1,221 -3.08 5,863 -5.88 0.2567
2016-11-10 2016-09-30 13F COSTCO WHSL CORP COM 22160K105 38,442 5,863
2016-08-05 2016-06-30 13F COSTCO WHSL CORP COM 22160K105 39,663 -8,130 -17.01 6,229 -17.29 0.2778
2016-05-05 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 47,793 -1,583 -3.21 7,531 -5.56 0.3686
2016-02-10 2015-12-31 13F COSTCO WHSL CORP COM 22160K105 49,376 1,524 3.18 7,974 15.26 0.3999
2015-11-03 2015-09-30 13F COSTCO WHSL CORP COM 22160K105 47,852 -62 -0.13 6,918 6.91 0.3602
2015-07-29 2015-06-30 13F COSTCO WHSL CORP COM 22160K105 47,914 -4,199 -8.06 6,471 -18.04 0.2936
2015-05-06 2015-03-31 13F COSTCO WHSL CORP COM 22160K105 52,113 -664 -1.26 7,895 5.53 0.3597
2015-02-12 2014-12-31 13F COSTCO WHSL CORP COM 22160K105 52,777 -888 -1.65 7,481 11.24 0.3540
2014-11-14 2014-09-30 13F COSTCO WHSL CORP COM 22160K105 53,665 2,118 4.11 6,725 13.29 0.3327
2014-08-15 2014-06-30 13F COSTCO WHSL CORP COM 22160K105 51,547 587 1.15 5,936 4.31 0.2990
2014-05-13 2014-03-31 13F COSTCO WHSL CORP COM 22160K105 50,960 3,044 6.35 5,691 -0.21 0.3102
2014-02-14 2013-12-31 13F COSTCO WHSL CORP COM 22160K105 47,916 1,032 2.20 5,703 5.61 0.2830
2013-11-06 2013-09-30 13F COSTCO WHSL CORP COM 22160K105 46,884 5,270 12.66 5,400 17.37 0.2910
2013-08-12 2013-06-30 13F COSTCO WHSL CORP COM 22160K105 41,614 41,614 4,601 0.2569
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.