Costco Wholesale Corporation
US ˙ NasdaqGS ˙ US22160K1051

SecurityCOST / Costco Wholesale Corporation
InstitutionCwm, Llc
Latest Disclosed Ownership80,747 shares
Latest Disclosed Value $ 80,459,097
Cwm, Llc reports 12.61% increase in ownership of COST / Costco Wholesale Corporation

On May 14, 2026 - Cwm, Llc filed a 13F-HR form disclosing ownership of 80,747 shares of Costco Wholesale Corporation (US:COST) valued at $80,458,733 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 71,705 shares of Costco Wholesale Corporation. This represents a change in shares of 12.61% during the quarter. The current value of the position is $77,664,887 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)
2026-05-14 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 80,747 9,042 12.61 80,459 131,800.00 0.2092
2026-01-26 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 71,705 1,023 1.45 62 -6.15 0.1675
2025-10-15 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 70,682 1,447 2.09 65 -4.41 0.1968
2025-07-25 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 69,235 5,946 9.39 69 15.25 0.2417
2025-05-01 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 63,289 4,796 8.20 60 11.32 0.2387
2025-02-04 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 58,493 3,729 6.81 54 10.42 0.2224
2024-10-08 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 54,764 3,151 6.11 49 11.63 0.2088
2024-07-10 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 51,613 2,791 5.72 44 22.86 0.2068
2024-04-05 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 48,822 5,867 13.66 36 25.00 0.1739
2024-02-01 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 42,955 7,552 21.33 28 40.00 0.1524
2023-10-11 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 35,403 8,001 29.20 20 42.86 0.1226
2023-08-03 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 27,402 4,915 21.86 15 27.27 0.0912
2023-05-01 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 22,487 1,830 8.86 11 22.22 0.0755
2023-02-01 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 20,657 323 1.59 9 -99.91 0.0695
2022-10-27 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 20,334 1,214 6.35 9,603 4.79 0.0763
2022-07-28 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 19,120 573 3.09 9,164 -14.19 0.0710
2022-04-21 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 18,547 1,618 9.56 10,680 11.12 0.0758
2022-01-31 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 16,929 2,538 17.64 9,611 68.79 0.0677
2021-09-15 2021-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 14,391 0 0.00 5,694 0.00 0.0454
2021-07-29 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 14,391 0 5,694 0.0454
2021-09-15 2021-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 14,391 0 0.00 5,694 0.00 0.0454
2021-04-27 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 13,970 -421 4,924 0.0433
2021-09-15 2020-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 14,391 0 0.00 5,694 0.00 0.0454
2021-01-27 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 13,205 -1,186 4,975 0.0466
2021-09-15 2020-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 14,391 0 0.00 5,694 0.00 0.0454
2020-10-19 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 15,658 1,267 5,559 0.0618
2021-09-15 2020-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 14,391 0 0.00 5,694 0.00 0.0454
2020-07-22 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 14,211 -180 4,309 0.0511
2021-09-15 2020-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 14,391 0 0.00 5,694 0.00 0.0454
2020-04-28 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 12,239 -2,152 3,490 0.0520
2021-09-14 2019-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 14,391 0 0.00 5,694 0.00 0.0454
2020-01-27 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 9,630 -4,761 2,831 0.0362
2021-09-14 2019-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 14,391 0 0.00 5,694 0.00 0.0454
2019-10-22 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 7,625 -6,766 2,197 0.0320
2021-09-14 2019-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 14,391 0 0.00 5,694 0.00 0.0454
2019-07-31 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 7,702 -6,689 2,035 0.0337
2021-09-02 2019-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 14,391 8,536 145.79 5,694 377.28 0.0454
2019-04-22 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 6,373 518 1,543 0.0309
2019-01-25 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 5,855 618 11.80 1,193 -3.01 0.0298
2018-10-29 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 5,237 -460 -8.07 1,230 3.27 0.0314
2018-07-31 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 5,697 -42 -0.73 1,191 10.18 0.0392
2018-04-26 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 5,739 -593 -9.37 1,081 -8.23 0.0430
2018-01-16 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 6,332 -136,820 -95.58 1,178 -94.99 0.0523
2017-10-16 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 143,152 -4,184 -2.84 23,518 -0.19 1.1119
2017-07-17 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 147,336 1,401 0.96 23,563 -3.71 1.2075
2017-04-17 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 145,935 19,298 15.24 24,472 20.69 1.3837
2017-01-19 2016-12-31 13F COSTCO WHSL CORP COM 22160K105 126,637 122,436 2,914.45 20,276 3,063.18 1.2427
2016-10-17 2016-09-30 13F COSTCO WHSL CORP COM 22160K105 4,201 2,401 133.39 641 126.50 0.0442
2016-07-21 2016-06-30 13F COSTCO WHSL CORP COM 22160K105 1,800 1,500 500.00 283 502.13 0.0206
2016-04-18 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 300 288 2,400.00 47 2,250.00 0.0041
2016-02-01 2015-12-31 13F COSTCO WHSL CORP COM 22160K105 12 12 0.00 2 0.0002
2015-02-12 2014-12-31 13F COSTCO WHSL CORP COM 22160K105 0 -7,940 -100.00 0 -100.00
2014-11-14 2014-09-30 13F COSTCO WHSL CORP COM 22160K105 7,940 5,765 265.06 995 298.00 0.1445
2014-08-14 2014-06-30 13F COSTCO WHSL CORP COM 22160K105 2,175 1,875 625.00 250 594.44 0.0447
2014-02-14 2013-12-31 13F COSTCO WHSL CORP COM 22160K105 300 78 35.14 36 38.46 0.0056
2013-11-14 2013-09-30 13F COSTCO WHSL CORP COM 22160K105 222 222 26 0.0068
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.