Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionRockefeller Capital Management L.P.
Latest Disclosed Ownership424,493 shares
Latest Disclosed Value $ 422,980,010
Rockefeller Capital Management L.P. reports 7.65% increase in ownership of COST / Costco Wholesale Corporation

On May 14, 2026 - Rockefeller Capital Management L.P. filed a 13F-HR form disclosing ownership of 424,493 shares of Costco Wholesale Corporation (MX:COST) valued at $422,980,010 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 16, 2026 disclosing 394,311 shares of Costco Wholesale Corporation. This represents a change in shares of 7.65% 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)
2026-05-14 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 424,493 30,182 7.65 422,980 24.39 0.7500
2026-03-16 2025-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 394,311 66,904 20.43 340,031 12.20 0.6123
2026-02-14 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 1,912,896 1,585,489 340,135 0.3105
2025-11-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 327,407 534 0.16 303,060 -6.34 0.5928
2025-08-14 2025-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 326,873 8,910 2.80 323,586 7.60 0.7096
2025-08-08 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 326,873 8,910 323,586 0.4079
2025-05-14 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 317,963 -25,651 -7.47 300,725 -4.43 0.7422
2025-02-13 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 343,614 5,407 1.60 314,653 5.00 0.8150
2024-11-14 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 338,207 3,263 0.97 299,669 5.30 0.8066
2024-08-12 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 334,944 8,266 2.53 284,578 18.90 0.8088
2024-05-14 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 326,678 11,948 3.80 239,335 15.21 0.6986
2024-02-14 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 314,730 13,778 4.58 207,748 22.19 0.6942
2023-11-14 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 300,952 16,542 5.82 170,027 11.39 0.6558
2023-08-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 284,410 10,106 3.68 152,640 112,134.56 0.5913
2023-05-16 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 274,304 11,336 4.31 136 -99.89 0.5861
2023-03-06 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 262,968 3,028 1.16 120,043 -2.21 0.6033
2022-11-02 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 259,940 30,901 13.49 122,760 11.83 0.6345
2022-08-12 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 229,039 11,549 5.31 109,771 -12.35 0.5833
2022-05-13 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 217,490 13,624 6.68 125,240 8.21 0.6040
2022-02-14 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 203,866 7,521 3.83 115,734 31.18 0.5401
2021-11-12 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 196,345 10,416 5.60 88,226 19.93 0.4636
2021-08-10 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 185,929 13,879 8.07 73,565 21.31 0.4144
2021-05-11 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 172,050 28,538 19.89 60,643 12.15 0.4104
2021-02-12 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 143,512 29,115 25.45 54,072 33.15 0.4095
2020-11-13 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 114,397 23,298 25.57 40,610 47.02 0.3804
2020-08-12 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 91,099 17,608 23.96 27,622 31.82 0.2890
2020-05-12 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 73,491 37,773 105.75 20,955 99.59 0.2749
2020-02-07 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 35,718 1,034 2.98 10,499 5.07 0.1309
2019-11-12 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 34,684 4,524 15.00 9,992 25.39 0.1355
2019-08-09 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 30,160 6,273 26.26 7,969 37.78 0.1111
2019-05-10 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 23,887 13,550 131.08 5,784 174.77 0.0824
2019-02-12 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 10,337 7,748 299.27 2,105 246.22 0.0369
2018-11-02 2018-09-30 13F Costco Wholesale Common 22160K105 2,589 0 0.00 608 12.38 0.0092
2018-07-31 2018-06-30 13F Costco Wholesale Common 22160K105 2,589 535 26.05 541 39.79 0.0088
2018-05-09 2018-03-31 13F Costco Wholesale Common 22160K105 2,054 2,054 387 0.0064
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.