코스트코 도매공사
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionAmalgamated Bank
Latest Disclosed Ownership93,527 shares
Latest Disclosed Value $ 93,193
Amalgamated Bank reports 2.89% decrease in ownership of COST / Costco Wholesale Corporation

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 93,527 shares of Costco Wholesale Corporation (MX:COST) valued at $93,193 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 96,311 shares of Costco Wholesale Corporation. This represents a change in shares of -2.89% 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)
2026-05-08 2026-03-31 13F COSTCO WHSL CORP COM 22160K105 93,527 -2,784 -2.89 93 12.05 0.7132
2026-02-05 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 96,311 -8,831 -8.40 83 -14.43 0.5994
2025-10-29 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 105,142 1,248 1.20 97 -4.90 0.6954
2025-08-04 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 103,894 -3,741 -3.48 103 0.99 0.7940
2025-04-25 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 107,635 -48 -0.04 102 3.06 0.8711
2025-02-04 2024-12-31 13F COSTCO WHOLESALE COM 22160K105 107,683 -2,296 -2.09 99 1.03 0.8099
2024-10-30 2024-09-30 13F COSTCO WHOLESALE COM 22160K105 109,979 14,691 15.42 97 21.25 0.8031
2024-08-12 2024-06-30 13F COSTCO WHOLESALE COM 22160K105 95,288 -825 -0.86 81 14.29 0.6898
2024-04-23 2024-03-31 13F COSTCO WHOLESALE COM 22160K105 96,113 -14,107 -12.80 70 -2.78 0.6022
2024-02-06 2023-12-31 13F COSTCO WHOLESALE COM 22160K105 110,220 -5,825 -5.02 73 10.77 0.5804
2023-11-08 2023-09-30 13F COSTCO WHOLESALE COM 22160K105 116,045 -12,174 -9.49 66 -5.80 0.5582
2023-08-11 2023-06-30 13F COSTCO WHOLESALE COM 22160K105 128,219 -3,825 -2.90 69 6.15 0.5587
2023-05-02 2023-03-31 13F COSTCO WHOLESALE COM 22160K105 132,044 10,973 9.06 66 18.18 0.5593
2023-02-10 2022-12-31 13F COSTCO WHOLESALE COM 22160K105 121,071 -11,608 -8.75 55 -99.91 0.4929
2022-11-09 2022-09-30 13F COSTCO WHOLESALE COM 22160K105 132,679 14,850 12.60 62,660 10.96 0.6049
2022-08-15 2022-06-30 13F COSTCO WHOLESALE COM 22160K105 117,829 -8,498 -6.73 56,473 -22.37 0.5265
2022-08-25 2022-03-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 126,327 5,278 4.36 72,745 5.86 0.5651
2022-06-30 2022-03-31 13F COSTCO WHOLESALE COM 22160K105 126,327 5,278 72,745 0.5777
2022-02-15 2021-12-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 121,049 20,864 20.83 68,720 52.65 0.5072
2022-02-15 2021-12-31 13F COSTCO WHOLESALE COM 22160K105 121,049 20,864 68,720 0.5072
2021-10-29 2021-09-30 13F COSTCO WHOLESALE COM 22160K105 100,185 -4,488 -4.29 45,018 8.70 0.3801
2021-08-16 2021-06-30 13F COSTCO WHOLESALE COM 22160K105 104,673 77,884 290.73 41,416 338.59 0.3320
2021-05-13 2021-03-31 13F COSTCO WHOLESALE COM 22160K105 26,789 -1,247 -4.45 9,443 -10.60 0.3541
2021-02-12 2020-12-31 13F COSTCO WHOLESALE COM 22160K105 28,036 -149 -0.53 10,563 5.57 0.4003
2020-10-30 2020-09-30 13F COSTCO WHOLESALE COM 22160K105 28,185 -834 -2.87 10,006 13.72 0.4350
2020-08-10 2020-06-30 13F COSTCO WHOLESALE COM 22160K105 29,019 -44,417 -60.48 8,799 -57.98 0.4072
2020-05-13 2020-03-31 13F COSTCO WHOLESALE COM 22160K105 73,436 -2,309 -3.05 20,939 -5.95 0.5119
2020-02-13 2019-12-31 13F COSTCO WHOLESALE COM 22160K105 75,745 2,245 3.05 22,263 5.13 0.4097
2019-11-13 2019-09-30 13F COSTCO WHOLESALE COM 22160K105 73,500 15,149 25.96 21,176 37.33 0.4453
2019-08-14 2019-06-30 13F COSTCO WHOLESALE COM 22160K105 58,351 -7,621 -11.55 15,420 -3.47 0.3599
2019-05-15 2019-03-31 13F COSTCO WHOLESALE COM 22160K105 65,972 1,538 2.39 15,974 21.70 0.3871
2019-02-15 2018-12-31 13F COSTCO WHOLESALE COM 22160K105 64,434 -1,746 -2.64 13,126 -15.56 0.3719
2018-11-14 2018-09-30 13F COSTCO WHOLESALE COM 22160K105 66,180 -2,048 -3.00 15,544 9.02 0.3844
2018-07-18 2018-06-30 13F COSTCO WHOLESALE COM 22160K105 68,228 4,235 6.62 14,258 18.25 0.3485
2018-05-22 2018-03-31 13F COSTCO WHOLESALE COM 22160K105 63,993 6,277 10.88 12,058 12.25 0.3199
2018-02-13 2017-12-31 13F COSTCO WHOLESALE COM 22160K105 57,716 5,029 9.55 10,742 24.10 0.2907
2017-11-09 2017-09-30 13F COSTCO WHOLESALE COM 22160K105 52,687 1,001 1.94 8,656 4.72 0.2696
2017-08-10 2017-06-30 13F COSTCO WHOLESALE COM 22160K105 51,686 18,635 56.38 8,266 49.15 0.2709
2017-05-12 2017-03-31 13F COSTCO WHOLESALE COM 22160K105 33,051 -14,207 -30.06 5,542 -26.75 0.2758
2017-02-14 2016-12-31 13F COSTCO WHOLESALE COM 22160K105 47,258 8,216 21.04 7,566 27.07 0.3420
2016-11-15 2016-09-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 39,042 48 0.12 5,954 -9.04 0.3455
2016-11-14 2016-09-30 13F COSTCO WHOLESALE COM 22160K105 11,387 1,737
2016-08-16 2016-06-30 13F COSTCO WHOLESALE COM 22160K105 38,994 21,513 123.07 6,546 137.60 0.3787
2016-05-11 2016-03-31 13F COSTCO WHOLESALE COM 22160K105 17,481 4,182 31.45 2,755 28.26 0.2684
2016-02-10 2015-12-31 13F COSTCO WHOLESALE COM 22160K105 13,299 -3,403 -20.37 2,148 -11.06 0.2650
2015-11-04 2015-09-30 13F COSTCO WHOLESALE COM 22160K105 16,702 615 3.82 2,415 11.14 0.2534
2015-07-10 2015-06-30 13F COSTCO WHOLESALE COM 22160K105 16,087 800 5.23 2,173 -6.17 0.2134
2015-04-22 2015-03-31 13F COSTCO WHOLESALE COM 22160K105 15,287 15,287 2,316 0.2827
2015-01-29 2014-12-31 13F COSTCO WHOLESALE COM 22160K105 0 -13,436 -100.00 0 -100.00
2014-11-14 2014-09-30 13F COSTCO WHOLESALE COM 22160K105 13,436 789 6.24 1,684 15.66 0.2506
2014-08-11 2014-06-30 13F COSTCO WHOLESALE COM 22160K105 12,647 1,497 13.43 1,456 16.95 0.2197
2014-05-12 2014-03-31 13F COSTCO WHOLESALE COM 22160K105 11,150 -215 -1.89 1,245 -7.98 0.2145
2014-02-13 2013-12-31 13F COSTCO WHOLESALE COM 22160K105 11,365 -100 -0.87 1,353 2.50 0.2300
2013-11-14 2013-09-30 13F COSTCO WHOLESALE COM 22160K105 11,465 -273 -2.33 1,320 1.69 0.4241
2013-08-15 2013-06-30 13F COSTCO WHOLESALE COM 22160K105 11,738 522 4.65 1,298 9.08 0.4756
2014-02-13 2013-03-31 13F COSTCO WHOLESALE COM 22160K105 11,216 3,729 49.81 1,190 61.03 0.3376
2014-02-11 2012-12-31 13F COSTCO WHOLESALE COM 22160K105 7,487 1,443 23.87 739 22.15 0.3078
2014-02-11 2012-09-30 13F COSTCO WHOLESALE COM 22160K105 6,044 190 3.25 605 8.81 0.3842
2014-02-11 2012-06-30 13F COSTCO WHOLESALE COM 22160K105 5,854 0 0.00 556 4.51 0.3992
2014-02-11 2012-03-31 13F COSTCO WHOLESALE COM 22160K105 5,854 -280 -4.56 532 4.11 0.3695
2014-02-11 2011-12-31 13F COSTCO WHOLESALE COM 22160K105 6,134 0 0.00 511 1.39 0.3672
2014-02-11 2011-09-30 13F COSTCO WHOLESALE COM 22160K105 6,134 408 7.13 504 8.39 0.4130
2014-02-11 2011-06-30 13F COSTCO WHOLESALE COM 22160K105 5,726 -100 -1.72 465 8.90 0.3366
2014-02-11 2011-03-31 13F COSTCO WHOLESALE COM 22160K105 5,826 -286 -4.68 427 -3.17 0.3103
2014-02-11 2010-12-31 13F COSTCO WHOLESALE COM 22160K105 6,112 6,112 441 0.3377
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.