Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionEnterprise Financial Services Corp
Latest Disclosed Ownership1,189 shares
Latest Disclosed Value $ 1,184,754
Enterprise Financial Services Corp reports 15.55% increase in ownership of COST / Costco Wholesale Corporation

On May 5, 2026 - Enterprise Financial Services Corp filed a 13F-HR form disclosing ownership of 1,189 shares of Costco Wholesale Corporation (MX:COST) valued at $1,184,754 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 1,029 shares of Costco Wholesale Corporation. This represents a change in shares of 15.55% 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)
2026-05-05 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 1,189 160 15.55 1,185 33.48 0.3332
2026-01-14 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 1,029 120 13.20 887 5.47 0.4505
2025-10-15 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 909 -52 -5.41 841 -11.57 0.4337
2025-08-12 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 961 90 10.33 951 15.55 0.5077
2025-05-14 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 871 2 0.23 824 3.39 0.4871
2025-02-07 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 869 48 5.85 796 9.49 0.4430
2024-11-12 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 821 -60 -6.81 728 -2.81 0.4242
2024-08-13 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 881 -11 -1.23 749 14.55 0.4610
2024-05-14 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 892 0 0.00 654 11.05 0.3934
2024-02-09 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 892 14 1.59 589 18.55 0.3588
2023-10-31 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 878 -54 -5.79 496 -1.00 0.3428
2023-08-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 932 -67 -6.71 502 1.01 0.3191
2023-05-15 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 999 -29 -2.82 496 5.76 0.3242
2023-02-14 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 1,028 35 3.52 469 0.00 0.3241
2022-11-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 993 -23 -2.26 469 -3.70 0.3496
2022-08-09 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 1,016 -127 -11.11 487 -25.99 0.0949
2022-05-16 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 1,143 46 4.19 658 5.62 0.1080
2022-02-14 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 1,097 -265 -19.46 623 1.80 0.0956
2021-11-15 2021-09-30 13F Costco Companie Common Stock 22160K105 1,362 247 22.15 612 38.78 0.0792
2021-08-16 2021-06-30 13F Costco Companie Common Stock 22160K105 1,115 276 32.90 441 48.99 0.0705
2021-05-13 2021-03-31 13F Costco Companie Common Stock 22160K105 839 21 2.57 296 -3.90 0.0528
2021-02-12 2020-12-31 13F Costco Companie Common Stock 22160K105 818 -211 -20.51 308 -15.85 0.0585
2020-11-13 2020-09-30 13F Costco Companie Common Stock 22160K105 1,029 -150 -12.72 366 2.52 0.0757
2020-08-04 2020-06-30 13F Costco Companie Common Stock 22160K105 1,179 5 0.43 357 6.57 0.0770
2020-05-15 2020-03-31 13F Costco Companie Common Stock 22160K105 1,174 264 29.01 335 25.47 0.0845
2020-01-28 2019-12-31 13F Costco Companie Common Stock 22160K105 910 0 0.00 267 1.91 0.0582
2019-10-31 2019-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 910 0 0.00 262 9.17 0.0596
2019-07-30 2019-06-30 13F Costco Companie Common Stock 22160K105 910 7 0.78 240 9.59 0.0521
2019-04-26 2019-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 903 533 144.05 219 192.00 0.0478
2019-01-25 2018-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 370 0 0.00 75 -13.79 0.0473
2018-10-26 2018-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 370 -150 -28.85 87 -20.18 0.0456
2018-07-27 2018-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 520 0 0.00 109 11.22 0.0553
2018-04-27 2018-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 520 43 9.01 98 10.11 0.0505
2018-01-26 2017-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 477 0 0.00 89 14.10 0.0433
2017-10-27 2017-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 477 -132 -21.67 78 -19.59 0.0386
2017-07-28 2017-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 609 59 10.73 97 5.43 0.0484
2017-04-27 2017-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 550 6 1.10 92 5.75 0.0453
2017-01-26 2016-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 544 -2 -0.37 87 4.82 0.0438
2016-10-28 2016-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 546 38 7.48 83 3.75 0.0470
2016-07-29 2016-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 508 0 0.00 80 0.00 0.0471
2016-04-29 2016-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 508 -54 -9.61 80 -12.09 0.0483
2016-01-29 2015-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 562 -96 -14.59 91 -4.21 0.0540
2015-10-29 2015-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 658 10 1.54 95 9.20 0.0608
2015-07-27 2015-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 648 -92 -12.43 87 -22.32 0.0514
2015-04-29 2015-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 740 0 0.00 112 6.67 0.0658
2015-01-23 2014-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 740 8 1.09 105 14.13 0.0636
2014-10-24 2014-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 732 -15 -2.01 92 6.98 0.0583
2014-07-24 2014-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 747 -18 -2.35 86 1.18 0.0513
2014-04-24 2014-03-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 765 13 1.73 85 -4.49 0.0522
2014-01-30 2013-12-31 13F COSTCO WHOLESALE COMMON STOCK 22160K105 752 0 0.00 89 2.30 0.0516
2013-10-25 2013-09-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 752 305 68.23 87 77.55 0.0550
2013-07-25 2013-06-30 13F COSTCO WHOLESALE COMMON STOCK 22160K105 447 447 49 0.0336
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.