Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionBollard Group LLC
Latest Disclosed Ownership4,016 shares
Latest Disclosed Value $ 4,002
Bollard Group LLC reports 1.41% increase in ownership of COST / Costco Wholesale Corporation

On May 14, 2026 - Bollard Group LLC filed a 13F-HR form disclosing ownership of 4,016 shares of Costco Wholesale Corporation (MX:COST) valued at $4,002 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,960 shares of Costco Wholesale Corporation. This represents a change in shares of 1.41% 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)
2026-05-14 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 4,016 56 1.41 4 33.33 0.1179
2026-02-13 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 3,960 6 0.15 3 0.00 0.0853
2025-11-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 3,954 5 0.13 4 0.00 0.0860
2025-08-13 2025-06-30 13F Costco Wholesale COM 22160K105 3,949 117 3.05 4 0.00 0.0894
2025-05-15 2025-03-31 13F Costco Wholesale COM 22160K105 3,832 4 0.10 4 0.00 0.0952
2025-02-14 2024-12-31 13F Costco Wholesale COM 22160K105 3,828 5 0.13 4 0.00 0.0972
2024-11-13 2024-09-30 13F Costco Wholesale COM 22160K105 3,823 5 0.13 3 0.00 0.0902
2024-08-14 2024-06-30 13F Costco Wholesale COM 22160K105 3,818 6 0.16 3 50.00 0.0916
2024-05-13 2024-03-31 13F Costco Wholesale COM 22160K105 3,812 89 2.39 3 0.00 0.0845
2024-02-13 2023-12-31 13F Costco Wholesale COM 22160K105 3,723 6 0.16 2 0.00 0.0855
2023-11-14 2023-09-30 13F Costco Wholesale COM 22160K105 3,717 7 0.19 2 100.00 0.0773
2023-08-14 2023-06-30 13F Costco Wholesale COM 22160K105 3,710 40 1.09 2 0.00 0.0679
2023-05-12 2023-03-31 13F Costco Wholesale COM 22160K105 3,670 4 0.11 2 0.00 0.0659
2023-02-10 2022-12-31 13F Costco Wholesale COM 22160K105 3,666 4 0.11 2 -99.94 0.0639
2022-11-09 2022-09-30 13F Costco Wholesale COM 22160K105 3,662 -15,397 -80.79 1,730 -81.06 0.0727
2022-08-12 2022-06-30 13F Costco Wholesale COM 22160K105 19,059 4 0.02 9,135 -16.75 0.3702
2022-05-12 2022-03-31 13F Costco Wholesale COM 22160K105 19,055 28 0.15 10,973 1.59 0.3510
2022-02-11 2021-12-31 13F Costco Wholesale COM 22160K105 19,027 29 0.15 10,801 26.52 0.3458
2021-11-12 2021-09-30 13F Costco Wholesale COM 22160K105 18,998 33 0.17 8,537 13.77 0.2796
2021-08-12 2021-06-30 13F Costco Wholesale COM 22160K105 18,965 38 0.20 7,504 12.49 0.2379
2021-05-11 2021-03-31 13F Costco Wholesale COM 22160K105 18,927 32 0.17 6,671 -6.29 0.2337
2021-02-04 2020-12-31 13F Costco Wholesale COM 22160K105 18,895 290 1.56 7,119 7.78 0.2651
2020-11-12 2020-09-30 13F Costco Wholesale COM 22160K105 18,605 34 0.18 6,605 17.30 0.2380
2020-08-13 2020-06-30 13F Costco Wholesale COM 22160K105 18,571 2,174 13.26 5,631 20.45 0.2212
2020-05-14 2020-03-31 13F Costco Wholesale COM 22160K105 16,397 0 0.00 4,675 -2.99 0.2078
2020-02-10 2019-12-31 13F Costco Wholesale COM 22160K105 16,397 1 0.01 4,819 2.01 0.1564
2019-11-13 2019-09-30 13F Costco Wholesale COM 22160K105 16,396 0 0.00 4,724 9.02 0.1659
2019-08-13 2019-06-30 13F Costco Wholesale COM 22160K105 16,396 1 0.01 4,333 9.14 0.1493
2019-05-10 2019-03-31 13F Costco Wholesale COM 22160K105 16,395 0 0.00 3,970 18.86 0.1499
2019-02-05 2018-12-31 13F Costco Wholesale COM 22160K105 16,395 801 5.14 3,340 -8.82 0.1473
2018-11-08 2018-09-30 13F Costco Wholesale COM 22160K105 15,594 0 0.00 3,663 12.40 0.1473
2018-08-09 2018-06-30 13F Costco Wholesale COM 22160K105 15,594 0 0.00 3,259 10.93 0.1497
2018-05-14 2018-03-31 13F Costco Wholesale COM 22160K105 15,594 1 0.01 2,938 1.24 0.1461
2018-01-29 2017-12-31 13F Costco Wholesale COM 22160K105 15,593 0 0.00 2,902 13.27 0.1395
2017-10-27 2017-09-30 13F Costco Wholesale COM 22160K105 15,593 1 0.01 2,562 2.73 0.1351
2017-07-19 2017-06-30 13F Costco Wholesale COM 22160K105 15,592 7 0.04 2,494 -4.55 0.1347
2017-04-19 2017-03-31 13F Costco Wholesale COM 22160K105 15,585 1,950 14.30 2,613 19.70 0.1498
2017-01-25 2016-12-31 13F Costco Wholesale COM 22160K105 13,635 1 0.01 2,183 5.00 0.1424
2016-10-26 2016-09-30 13F Costco Wholesale COM 22160K105 13,634 158 1.17 2,079 -1.75 0.1330
2016-07-20 2016-06-30 13F Costco Wholesale COM 22160K105 13,476 0 0.00 2,116 -0.38 0.1445
2016-05-09 2016-03-31 13F Costco Wholesale COM 22160K105 13,476 0 0.00 2,124 -2.39 0.1710
2016-02-04 2015-12-31 13F Costco Wholesale COM 22160K105 13,476 0 0.00 2,176 11.70 0.1791
2015-10-30 2015-09-30 13F Costco Wholesale COM 22160K105 13,476 38 0.28 1,948 7.33 0.1598
2015-08-12 2015-06-30 13F Costco Wholesale COM 22160K105 13,438 37 0.28 1,815 -10.59 0.1371
2015-05-12 2015-03-31 13F Costco Wholesale COM 22160K105 13,401 469 3.63 2,030 10.75 0.1512
2015-02-12 2014-12-31 13F Costco Wholesale COM 22160K105 12,932 32 0.25 1,833 13.36 0.1618
2014-11-14 2014-09-30 13F Costco Wholesale COM 22160K105 12,900 0 0.00 1,617 8.82 0.1527
2014-08-13 2014-06-30 13F Costco Wholesale COM 22160K105 12,900 0 0.00 1,486 3.12 0.1436
2014-05-14 2014-03-31 13F Costco Wholesale COM 22160K105 12,900 0 0.00 1,441 -6.12 0.1457
2014-02-13 2013-12-31 13F Costco Wholesale COM 22160K105 12,900 -1,810 -12.30 1,535 -9.39 0.1692
2013-11-12 2013-09-30 13F/A-1 Costco Wholesale COM 22160K105 14,710 12,900 712.71 1,694 747.00 0.1992
2013-11-05 2013-09-30 13F Costco Wholesale COM 22160K105 14,710 1,694
2013-08-12 2013-06-30 13F Costco Wholesale COM 22160K105 1,810 1,810 200 0.0385
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.