Costco Wholesale Corporation
US ˙ NasdaqGS ˙ US22160K1051

SecurityCOST / Costco Wholesale Corporation
InstitutionTocqueville Asset Management L.p.
Latest Disclosed Ownership3,216 shares
Latest Disclosed Value $ 3,204,519
Tocqueville Asset Management L.p. reports 9.43% decrease in ownership of COST / Costco Wholesale Corporation

On May 12, 2026 - Tocqueville Asset Management L.p. filed a 13F-HR form disclosing ownership of 3,216 shares of Costco Wholesale Corporation (US:COST) valued at $3,204,519 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 3,551 shares of Costco Wholesale Corporation. This represents a change in shares of -9.43% during the quarter. The current value of the position is $3,125,534 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)
2026-05-12 2026-03-31 13F COSTCO WHSL CORP COM 22160K105 3,216 -335 -9.43 3,205 4.64 0.0475
2026-02-12 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 3,551 -13,791 -79.52 3,062 -80.92 0.0447
2025-11-13 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 17,342 -46 -0.26 16,052 -6.74 0.2334
2025-08-12 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 17,388 591 3.52 17,213 8.35 0.2620
2025-05-13 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 16,797 -397 -2.31 15,886 0.84 0.2594
2025-02-10 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 17,194 252 1.49 15,754 4.89 0.2471
2024-11-08 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 16,942 -1,875 -9.96 15,019 -6.10 0.2359
2024-08-12 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 18,817 -1,460 -7.20 15,994 7.67 0.2640
2024-05-09 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 20,277 463 2.34 14,856 13.59 0.2427
2024-02-12 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 19,814 -455 -2.24 13,079 14.21 0.2371
2023-11-09 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 20,269 436 2.20 11,451 7.25 0.2175
2023-08-11 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 19,833 -278 -1.38 10,678 6.86 0.1912
2023-05-10 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 20,111 107 0.53 9,993 9.43 0.1888
2023-02-09 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 20,004 -236 -1.17 9,132 -4.48 0.1734
2022-11-10 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 20,240 -140 -0.69 9,559 -2.14 0.1948
2022-08-12 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 20,380 -1 -0.00 9,768 -16.77 0.1786
2022-05-16 2022-03-31 13F Costco Wholesale COM 22160K105 20,381 54 0.27 11,736 1.70 0.1773
2022-02-14 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 20,327 -81 -0.40 11,540 25.85 0.1587
2021-11-15 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 20,408 -663 -3.15 9,170 9.99 0.1358
2021-08-16 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 21,071 -616 -2.84 8,337 9.07 0.1204
2021-05-17 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 21,687 -156 -0.71 7,644 -7.12 0.1176
2021-02-16 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 21,843 228 1.05 8,230 7.26 0.1374
2020-11-16 2020-09-30 13F COSTCO WHOLESALE COM 22160K105 21,615 -73 -0.34 7,673 16.68 0.1468
2020-08-12 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 21,688 -869 -3.85 6,576 2.24 0.1371
2020-05-15 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 22,557 20,924 1,281.32 6,432 1,240.00 0.1598
2020-01-14 2019-12-31 13F Costco Wholesale COM 22160K105 1,633 -4,789 -74.57 480 -74.05 0.0071
2019-10-31 2019-09-30 13F Costco Wholesale COM 22160K105 6,422 34 0.53 1,850 9.60 0.0251
2019-07-31 2019-06-30 13F Costco Wholesale COM 22160K105 6,388 0 0.00 1,688 9.11 0.0219
2019-04-30 2019-03-31 13F Costco Wholesale COM 22160K105 6,388 500 8.49 1,547 29.02 0.0207
2019-02-08 2018-12-31 13F Costco Wholesale COM 22160K105 5,888 0 0.00 1,199 -13.30 0.0180
2018-11-13 2018-09-30 13F Costco Wholesale COM 22160K105 5,888 -105 -1.75 1,383 10.46 0.0174
2018-08-13 2018-06-30 13F Costco Wholesale COM 22160K105 5,993 50 0.84 1,252 11.79 0.0159
2018-05-14 2018-03-31 13F Costco Wholesale COM 22160K105 5,943 0 0.00 1,120 1.27 0.0143
2018-02-13 2017-12-31 13F Costco Wholesale COM 22160K105 5,943 0 0.00 1,106 13.32 0.0126
2017-10-30 2017-09-30 13F Costco Wholesale COM 22160K105 5,943 0 0.00 976 2.74 0.0112
2017-08-04 2017-06-30 13F Costco Wholesale COM 22160K105 5,943 0 0.00 950 -4.71 0.0114
2017-04-28 2017-03-31 13F Costco Wholesale COM 22160K105 5,943 105 1.80 997 6.63 0.0122
2017-01-30 2016-12-31 13F Costco Wholesale COM 22160K105 5,838 -500 -7.89 935 -3.31 0.0120
2016-10-31 2016-09-30 13F Costco Wholesale COM 22160K105 6,338 -26,022 -80.41 967 -80.97 0.0116
2016-08-15 2016-06-30 13F/A-1 Costco Wholesale COM 22160K105 32,360 14 0.04 5,082 -0.29 0.0606
2016-07-29 2016-06-30 13F Costco Wholesale COM 22160K105 32,360 5,082
2016-04-29 2016-03-31 13F Costco Wholesale COM 22160K105 32,346 -13,117 -28.85 5,097 -30.58 0.0675
2016-01-29 2015-12-31 13F Costco Wholesale COM 22160K105 45,463 -833 -1.80 7,342 9.70 0.0995
2015-10-30 2015-09-30 13F Costco Wholesale COM 22160K105 46,296 16 0.03 6,693 7.07 0.0895
2015-07-31 2015-06-30 13F Costco Wholesale COM 22160K105 46,280 -4,153 -8.23 6,251 -18.18 0.0736
2015-04-30 2015-03-31 13F Costco Wholesale COM 22160K105 50,433 50,433 7,640 0.0898
2015-01-30 2014-12-31 13F Costco Wholesale COM 22160K105 0 -50,616 -100.00 0 -100.00
2014-10-30 2014-09-30 13F Costco Wholesale COM 22160K105 50,616 3,608 7.68 6,343 17.18 0.0704
2014-09-18 2014-06-30 13F/A-1 Costco Wholesale COM 22160K105 47,008 21,875 87.04 5,413 92.84 0.0527
2014-07-30 2014-06-30 13F Costco Wholesale COM 22160K105 47,008 5,413
2014-04-30 2014-03-31 13F Costco Wholesale COM 22160K105 25,133 17,000 209.02 2,807 189.98 0.0369
2014-01-30 2013-12-31 13F Costco Wholesale COM 22160K105 8,133 275 3.50 968 6.96 0.0130
2013-10-30 2013-09-30 13F Costco Wholesale COM 22160K105 7,858 0 0.00 905 4.14 0.0113
2013-07-30 2013-06-30 13F Costco Wholesale COM 22160K105 7,858 7,858 869 0.0118
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.