Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionBessemer Group Inc
Latest Disclosed Ownership669,797 shares
Latest Disclosed Value $ 667,407
Bessemer Group Inc reports 12.84% increase in ownership of COST / Costco Wholesale Corporation

On May 6, 2026 - Bessemer Group Inc filed a 13F-HR form disclosing ownership of 669,797 shares of Costco Wholesale Corporation (MX:COST) valued at $667,407 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 593,588 shares of Costco Wholesale Corporation. This represents a change in shares of 12.84% 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)
2026-05-06 2026-03-31 13F COSTCO WHSL CORP SC 22160K105 669,797 76,209 12.84 667 30.53 1.0491
2026-02-05 2025-12-31 13F COSTCO WHSL CORP SC 22160K105 593,588 -157,803 -21.00 512 -26.47 0.7859
2025-11-05 2025-09-30 13F COSTCO WHSL CORP SC 22160K105 751,391 -133,166 -15.05 696 -20.57 1.0637
2025-08-01 2025-06-30 13F COSTCO WHSL CORP SC 22160K105 884,557 7,973 0.91 876 5.55 1.4215
2025-04-23 2025-03-31 13F COSTCO WHSL CORP SC 22160K105 876,584 101,220 13.05 829 16.76 1.4864
2025-02-13 2024-12-31 13F COSTCO WHSL CORP SC 22160K105 775,364 -9,289 -1.18 710 2.16 1.1597
2024-11-12 2024-09-30 13F COSTCO WHSL CORP SC 22160K105 784,653 1,356 0.17 696 4.51 1.1458
2024-08-13 2024-06-30 13F COSTCO WHSL CORP SC 22160K105 783,297 -5,577 -0.71 666 15.25 1.1742
2024-08-13 2024-03-31 13F/A-1 COSTCO WHSL CORP SC 22160K105 788,874 -98,597 -11.11 578 -1.37 1.0445
2024-05-13 2024-03-31 13F COSTCO WHSL CORP SC 22160K105 788,874 -98,597 578 1.0445
2024-02-09 2023-12-31 13F COSTCO WHSL CORP SC 22160K105 887,471 -4,610 -0.52 586 16.30 1.1413
2023-11-13 2023-09-30 13F COSTCO WHSL CORP SC 22160K105 892,081 8,382 0.95 504 5.89 1.1065
2023-08-10 2023-06-30 13F COSTCO WHSL CORP SC 22160K105 883,699 45,584 5.44 476 14.18 1.0094
2023-05-10 2023-03-31 13F COSTCO WHSL CORP SC 22160K105 838,115 171,756 25.78 416 36.84 0.9885
2023-02-13 2022-12-31 13F COSTCO WHSL CORP SC 22160K105 666,359 3,519 0.53 304 -99.90 0.7409
2022-11-09 2022-09-30 13F COSTCO WHSL CORP SC 22160K105 662,840 2,945 0.45 313,039 -1.02 0.8170
2022-08-10 2022-06-30 13F COSTCO WHSL CORP SC 22160K105 659,895 3,120 0.48 316,275 -16.37 0.7887
2022-05-12 2022-03-31 13F COSTCO WHSL CORP SC 22160K105 656,775 157,513 31.55 378,204 33.44 0.7935
2022-01-27 2021-12-31 13F COSTCO WHSL CORP SC 22160K105 499,262 9,822 2.01 283,432 28.87 0.5680
2021-11-12 2021-09-30 13F COSTCO WHSL CORP SC 22160K105 489,440 3,688 0.76 219,928 14.43 0.4690
2021-08-06 2021-06-30 13F COSTCO WHSL CORP SC 22160K105 485,752 19,256 4.13 192,196 16.89 0.4171
2021-05-13 2021-03-31 13F COSTCO WHSL CORP SC 22160K105 466,496 25,476 5.78 164,431 -1.04 0.3940
2021-02-09 2020-12-31 13F COSTCO WHSL CORP SC 22160K105 441,020 5,547 1.27 166,167 7.49 0.4391
2020-11-12 2020-09-30 13F COSTCO WHSL CORP SC 22160K105 435,473 24,297 5.91 154,593 24.00 0.4569
2020-08-05 2020-06-30 13F COSTCO WHSL CORP SC 22160K105 411,176 -65,236 -13.69 124,672 -8.22 0.3935
2020-04-30 2020-03-31 13F COSTCO WHSL CORP SC 22160K105 476,412 -51,526 -9.76 135,838 -12.46 0.5471
2020-02-04 2019-12-31 13F COSTCO WHSL CORP SC 22160K105 527,938 -69,278 -11.60 155,172 -9.82 0.5023
2019-11-07 2019-09-30 13F COSTCO WHSL CORP SC 22160K105 597,216 -136,706 -18.63 172,064 -11.28 0.6143
2019-07-19 2019-06-30 13F COSTCO WHSL CORP SC 22160K105 733,922 -111,865 -13.23 193,947 -5.30 0.6534
2019-05-13 2019-03-31 13F COSTCO WHSL CORP SC 22160K105 845,787 168,523 24.88 204,801 48.44 0.7863
2019-05-21 2018-12-31 13F/A-1 COSTCO WHSL CORP SC 22160K105 677,264 63,796 10.40 137,965 -4.25 0.6009
2019-02-12 2018-12-31 13F COSTCO WHSL CORP SC 22160K105 677,264 63,796 137,965 0.6007
2018-11-06 2018-09-30 13F COSTCO WHSL CORP SC 22160K105 613,468 287 0.05 144,091 12.45 0.5365
2018-07-25 2018-06-30 13F COSTCO WHSL CORP SC 22160K105 613,181 187,084 43.91 128,143 59.60 0.4970
2018-05-10 2018-03-31 13F COSTCO WHSL CORP SC 22160K105 426,097 38,384 9.90 80,291 11.26 0.3124
2018-01-30 2017-12-31 13F COSTCO WHSL CORP SC 22160K105 387,713 5,795 1.52 72,162 15.01 0.2801
2017-11-03 2017-09-30 13F COSTCO WHSL CORP SC 22160K105 381,918 20,394 5.64 62,745 8.52 0.2503
2017-07-27 2017-06-30 13F COSTCO WHSL CORP SC 22160K105 361,524 3,223 0.90 57,819 -3.77 0.2330
2017-05-12 2017-03-31 13F COSTCO WHSL CORP SC 22160K105 358,301 -224,376 -38.51 60,083 -35.60 0.2506
2017-02-07 2016-12-31 13F COSTCO WHSL CORP SC 22160K105 582,677 -624,671 -51.74 93,292 -49.33 0.4297
2016-11-10 2016-09-30 13F COSTCO WHSL CORP SC 22160K105 1,207,348 70,126 6.17 184,133 3.10 0.9261
2016-08-11 2016-06-30 13F COSTCO WHSL CORP SC 22160K105 1,137,222 401,327 54.54 178,590 54.01 0.9793
2016-05-11 2016-03-31 13F COSTCO WHSL CORP SC 22160K105 735,895 720,550 4,695.67 115,962 4,579.66 0.6545
2016-02-12 2015-12-31 13F COSTCO WHSL CORP SC 22160K105 15,345 1,552 11.25 2,478 24.27 0.0138
2015-11-16 2015-09-30 13F COSTCO WHSL CORP SC 22160K105 13,793 -38,227 -73.49 1,994 -71.62 0.0114
2015-08-14 2015-06-30 13F COSTCO WHSL CORP SC 22160K105 52,020 -20,061 -27.83 7,026 -35.65 0.0367
2015-06-18 2015-03-31 13F/A-1 COSTCO WHSL CORP SC 22160K105 72,081 40,198 126.08 10,919 141.57 0.0554
2015-05-14 2015-03-31 13F COSTCO WHSL CORP SC 22160K105 72,081 10,919
2015-02-17 2014-12-31 13F COSTCO WHSL CORP SC 22160K105 31,883 6,911 27.67 4,520 44.46 0.0243
2014-12-11 2014-09-30 13F/A-1 COSTCO WHSL CORP SC 22160K105 24,972 13,256 113.14 3,129 131.95 0.0178
2014-11-13 2014-09-30 13F COSTCO WHSL CORP SC 22160K105 24,972 13,256 3,129 0.0198
2014-08-13 2014-06-30 13F COSTCO WHSL CORP SC 22160K105 11,716 459 4.08 1,349 7.15 0.0083
2014-05-14 2014-03-31 13F COSTCO WHSL CORP SC 22160K105 11,257 -2,550 -18.47 1,259 -23.42 0.0085
2014-02-18 2013-12-31 13F COSTCO WHSL CORP SC 22160K105 13,807 34 0.25 1,644 3.72 0.0118
2013-11-08 2013-09-30 13F COSTCO WHSL CORP SC 22160K105 13,773 -188 -1.35 1,585 2.66 0.0129
2013-08-14 2013-06-30 13F COSTCO WHSL CORP SC 22160K105 13,961 13,961 1,544 0.0138
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.