Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionNorges Bank
Latest Disclosed Ownership6,024,787 shares
Latest Disclosed Value $ 5,195,414,822
Norges Bank ownership in COST / Costco Wholesale Corporation

On February 10, 2026 - Norges Bank filed a 13F-HR form disclosing ownership of 6,024,787 shares of Costco Wholesale Corporation (MX:COST) valued at $5,195,414,822 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 0 shares of Costco Wholesale Corporation.

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)
2026-02-10 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 6,024,787 6,024,787 5,195,415 0.5558
2025-11-13 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 0 -5,749,879 -100.00 0 -100.00
2025-08-13 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 5,749,879 140,903 2.51 5,692,035 7.30 0.7105
2026-05-11 2025-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 5,608,976 -46,907 -0.83 5,304,857 2.36 0.7446
2025-02-12 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 5,655,883 144,522 2.62 5,182,316 6.07 0.6800
2025-11-12 2024-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 5,511,361 197,929 3.73 4,885,932 8.18 0.6825
2024-08-14 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 5,313,432 120,031 2.31 4,516,364 18.70 0.6747
2025-05-14 2024-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 5,193,401 -303,954 -5.53 3,804,841 4.85 0.6005
2024-02-09 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 5,497,355 143,640 2.68 3,628,694 19.97 0.6341
2024-11-13 2023-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 5,353,715 134,602 2.58 3,024,635 7.64 0.6138
2024-08-14 2023-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 5,219,113 30,149 0.58 2,809,866 8.98 0.5545
2024-05-15 2023-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 5,188,964 87,443 1.71 2,578,241 10.71 0.5642
2023-02-14 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 5,101,521 244,265 5.03 2,328,844 1.52 0.5614
2023-11-13 2022-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,857,256 233,819 5.06 2,293,936 3.52 0.6099
2023-08-14 2022-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,623,437 420,437 10.00 2,215,921 -8.44 0.5728
2023-05-12 2022-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,203,000 109,736 2.68 2,420,298 4.15 0.5276
2022-03-09 2021-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,093,264 -248,889 -5.73 2,323,746 19.10 0.4778
2022-11-14 2021-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,342,153 -60,945 -1.38 1,951,146 11.99 0.4317
2022-08-15 2021-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,403,098 -149,438 -3.28 1,742,174 8.57 0.3777
2022-05-09 2021-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,552,536 -182,372 -3.85 1,604,678 -10.05 0.3674
2021-03-02 2020-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,734,908 -192,135 -3.90 1,784,019 2.00 0.4166
2021-11-12 2020-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,927,043 102,813 2.13 1,749,100 19.58 0.4647
2021-08-13 2020-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,824,230 80,690 1.70 1,462,755 8.15 0.4211
2021-05-07 2020-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,743,540 193,469 4.25 1,352,526 1.13 0.4820
2020-03-03 2019-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 4,550,071 24,661 0.54 1,337,357 2.57 0.3732
2020-11-13 2019-09-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 4,525,410 20,059 0.45 1,303,816 9.51 0.3993
2020-08-13 2019-06-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 4,505,351 -83,361 -1.82 1,190,585 7.15 0.3679
2020-05-11 2019-03-31 13F/A-2 COSTCO WHOLESALE COM 22160K105 4,588,712 324,643 7.61 1,111,111 27.91 0.3590
2019-03-04 2018-12-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 4,264,069 343,763 8.77 868,633 -5.67 0.3231
2019-12-02 2018-09-30 13F/A-3 COSTCO WHOLESALE COM 22160K105 3,920,306 4,307 0.11 920,801 12.52 0.2991
2019-12-02 2018-09-30 13F/A-2 COSTCO WHOLESALE COM 22160K105 3,920,306 4,307 920,801 0.2991
2019-11-12 2018-09-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,920,306 4,307 920,801 0.2991
2019-08-12 2018-06-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,915,999 28,768 0.74 818,366 11.73 0.2809
2019-05-15 2018-03-31 13F/A-2 COSTCO WHOLESALE COM 22160K105 3,887,231 -32,556 -0.83 732,472 0.40 0.2650
2018-03-05 2017-12-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,919,787 65,121 1.69 729,551 15.20 0.2615
2018-11-13 2017-09-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,854,666 -31,641 -0.81 633,284 1.89 0.2403
2018-07-24 2017-06-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,886,307 87,275 2.30 621,537 -2.44 0.2467
2018-05-11 2017-03-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,799,032 342,865 9.92 637,060 15.12 0.2614
2017-03-02 2016-12-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,456,167 -414,208 -10.70 553,367 -1.85 0.2419
2017-11-13 2016-09-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,870,375 -261,798 -6.34 563,773 -13.12 0.2665
2017-08-09 2016-06-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 4,132,173 280,027 7.27 648,916 6.90 0.3083
2017-05-10 2016-03-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,852,146 194,151 5.31 607,021 2.75 0.2986
2016-04-18 2015-12-31 13F/A-2 COSTCO WHOLESALE COM 22160K105 3,657,995 93,226 2.62 590,766 14.63 0.2937
2016-03-16 2015-12-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,657,995 0 590,766 0.2963
2016-11-14 2015-09-30 13F/A-2 COSTCO WHOLESALE COM 22160K105 3,564,769 38,690 1.10 515,358 8.22 0.2701
2016-08-12 2015-06-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,526,079 41,298 1.19 476,233 -9.79 0.2380
2016-05-13 2015-03-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,484,781 171,331 5.17 527,927 12.40 0.2587
2015-03-19 2014-12-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,313,450 121,953 469,682 0.2396
2016-04-18 2014-12-31 13F/A-2 COSTCO WHOLESALE COM 22160K105 3,313,450 121,953 3.82 469,682 17.43 0.2387
2015-11-12 2014-09-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,191,497 0 0.00 399,959 8.82 0.2167
2015-08-10 2014-06-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,191,497 0 0.00 367,533 3.12 0.1983
2015-05-12 2014-03-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,191,497 0 0.00 356,426 -6.16 0.2011
2014-03-07 2013-12-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,191,497 -498,347 379,820 0.2324
2014-03-20 2013-12-31 13F/A-2 COSTCO WHOLESALE COM 22160K105 3,191,497 0 379,820 0.2235
2014-05-12 2013-12-31 13F/A-3 COSTCO WHOLESALE COM 22160K105 3,191,497 -498,347 -13.51 379,820 -10.58 0.2187
2014-11-14 2013-09-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 3,689,844 -351,228 -8.69 424,775 -4.93 0.2479
2014-08-14 2013-06-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 4,041,072 -425,286 -9.52 446,821 -5.72 0.2775
2014-04-04 2013-03-31 13F/A-1 COSTCO WHOLESALE COM 22160K105 4,466,358 54,764 473,925 0.3140
2014-05-12 2013-03-31 13F/A-2 COSTCO WHOLESALE COM 22160K105 4,466,358 54,764 1.24 473,925 7.29 0.3073
2013-11-14 2012-09-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 4,411,594 29,979 0.68 441,711 4.81 0.2977
2013-08-15 2012-06-30 13F/A-1 COSTCO WHOLESALE COM 22160K105 4,381,615 4,381,615 421,423 0.3380
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.