Costco Wholesale Corporation
IT ˙ BIT ˙ US22160K1051
836,20 € ↑12,80 (1,55%)
2026-06-04
AKTIENPREIS
SecurityIT:1COST / Costco Wholesale Corporation
InstitutionBaxter Bros Inc
Latest Disclosed Ownership5,392 shares
Latest Disclosed Value $ 5,372,751
Baxter Bros Inc reports 2.03% decrease in ownership of 1COST / Costco Wholesale Corporation

On April 28, 2026 - Baxter Bros Inc filed a 13F-HR form disclosing ownership of 5,392 shares of Costco Wholesale Corporation (IT:1COST) valued at $4,846,869 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 5,504 shares of Costco Wholesale Corporation. This represents a change in shares of -2.03% during the quarter. The current value of the position is $4,508,790 USD.

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 5,392 -112 -2.03 5,373 13.19 0.6632
2026-01-26 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 5,504 -8 -0.15 4,746 -6.98 0.5492
2025-10-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 5,512 771 16.26 5,102 8.72 0.5897
2025-07-24 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 4,741 -201 -4.07 4,693 0.41 0.5741
2025-04-09 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 4,942 111 2.30 4,674 5.60 0.6156
2025-02-12 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 4,831 -20 -0.41 4,427 2.93 0.5790
2024-10-29 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 4,851 -75 -1.52 4,301 2.70 0.5591
2024-07-15 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 4,926 12 0.24 4,187 16.31 0.5481
2024-04-29 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 4,914 -47 -0.95 3,600 9.96 0.4618
2024-05-17 2023-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,961 0 0.00 3,275 16.85 0.4536
2024-02-06 2023-12-31 13F Costco Wholesale COM 22160K105 4,961 0 3,275 0.4629
2024-05-17 2023-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,961 0 0.00 2,803 4.94 0.4255
2023-10-23 2023-09-30 13F Costco Wholesale COM 22160K105 4,961 0 2,803 0.4309
2023-08-14 2023-06-30 13F Costco Wholesale COM 22160K105 4,961 0 0.00 2,671 8.36 0.3972
2023-05-15 2023-03-31 13F Costco Wholesale COM 22160K105 4,961 -50 -1.00 2,465 7.69 0.3875
2023-02-01 2022-12-31 13F Costco Wholesale COM 22160K105 5,011 -80 -1.57 2,288 -4.83 0.3762
2022-11-14 2022-09-30 13F Costco Wholesale COM 22160K105 5,091 2 0.04 2,404 -1.44 0.4260
2022-07-25 2022-06-30 13F Costco Wholesale COM 22160K105 5,089 -45 -0.88 2,439 -17.49 0.4377
2022-04-20 2022-03-31 13F Costco Wholesale COM 22160K105 5,134 -420 -7.56 2,956 -6.25 0.4439
2022-01-14 2021-12-31 13F Costco Wholesale COM 22160K105 5,554 163 3.02 3,153 30.18 0.4570
2021-10-25 2021-09-30 13F Costco Wholesale COM 22160K105 5,391 3 0.06 2,422 13.60 0.3877
2021-08-11 2021-06-30 13F Costco Wholesale COM 22160K105 5,388 -50 -0.92 2,132 11.22 0.3378
2021-04-23 2021-03-31 13F Costco Wholesale COM 22160K105 5,438 375 7.41 1,917 0.47 0.3293
2021-01-25 2020-12-31 13F Costco Wholesale COM 22160K105 5,063 350 7.43 1,908 14.05 0.3614
2020-11-05 2020-09-30 13F Costco Wholesale COM 22160K105 4,713 -94 -1.96 1,673 14.75 0.3618
2020-07-31 2020-06-30 13F Costco Wholesale COM 22160K105 4,807 -175 -3.51 1,458 2.60 0.3421
2020-04-17 2020-03-31 13F Costco Wholesale COM 22160K105 4,982 0 0.00 1,421 -2.94 0.3681
2020-01-10 2019-12-31 13F/A-20 Costco Wholesale COM 22160K105 4,982 65 1.32 1,464 3.32 0.3047
2020-01-09 2019-12-31 13F Costco Wholesale COM 22160K105 2,878 -2,039 408 145,026.4460
2019-10-21 2019-09-30 13F Costco Wholesale COM 22160K105 4,917 1,050 27.15 1,417 38.65 0.3208
2019-07-29 2019-06-30 13F Costco Wholesale COM 22160K105 3,867 200 5.45 1,022 15.09 0.2335
2019-04-22 2019-03-31 13F Costco Wholesale COM 22160K105 3,667 -35 -0.95 888 17.77 0.2074
2019-01-22 2018-12-31 13F Costco Wholesale COM 22160K105 3,702 10 0.27 754 -13.03 0.2046
2018-10-11 2018-09-30 13F Costco Wholesale COM 22160K105 3,692 -15 -0.40 867 11.87 0.2081
2018-07-17 2018-06-30 13F Costco Wholesale COM 22160K105 3,707 -55 -1.46 775 9.31 0.2084
2018-05-16 2018-03-31 13F Costco Wholesale COM 22160K105 3,762 300 8.67 709 10.09 0.1934
2018-02-01 2017-12-31 13F Costco Wholesale COM 22160K105 3,462 125 3.75 644 17.52 0.1765
2017-10-16 2017-09-30 13F Costco Wholesale COM 22160K105 3,337 0 0.00 548 2.62 0.1575
2017-08-01 2017-06-30 13F Costco Wholesale COM 22160K105 3,337 15 0.45 534 -4.13 0.1607
2017-04-24 2017-03-31 13F Costco Wholesale COM 22160K105 3,322 0 0.00 557 4.70 0.1742
2017-01-19 2016-12-31 13F Costco Wholesale COM 22160K105 3,322 0 0.00 532 4.93 0.1713
2016-10-20 2016-09-30 13F Costco Wholesale COM 22160K105 3,322 370 12.53 507 9.27 0.1714
2016-07-07 2016-06-30 13F Costco Wholesale COM 22160K105 2,952 -126 -4.09 464 -6.64 0.1623
2016-02-08 2015-12-31 13F Costco Wholesale COM 22160K105 3,078 50 1.65 497 21.52 0.1842
2015-10-05 2015-09-30 13F Costco Wholesale COM 22160K105 3,028 0 0.00 409 0.00 0.1502
2015-07-07 2015-06-30 13F Costco Wholesale COM 22160K105 3,028 50 1.68 409 -9.31 0.1500
2015-04-16 2015-03-31 13F Costco Wholesale COM 22160K105 2,978 100 3.47 451 10.54 0.1641
2015-01-22 2014-12-31 13F Costco Wholesale COM 22160K105 2,878 1,035 56.16 408 76.62 0.1476
2014-11-04 2014-09-30 13F Costco Wholesale COM 22160K105 1,843 18 0.99 231 10.00 0.0899
2014-07-11 2014-06-30 13F Costco Wholesale COM 22160K105 1,825 0 0.00 210 2.94 0.0865
2014-04-08 2014-03-31 13F Costco Wholesale COM 22160K105 1,825 1,825 204 0.0926
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.