Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionOcean Capital Management, LLC
Latest Disclosed Ownership54,656 shares
Latest Disclosed Value $ 54,460,637
Ocean Capital Management, LLC reports 2.10% decrease in ownership of COST / Costco Wholesale Corporation

On April 29, 2026 - Ocean Capital Management, LLC filed a 13F-HR form disclosing ownership of 54,656 shares of Costco Wholesale Corporation (MX:COST) valued at $54,460,637 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 55,827 shares of Costco Wholesale Corporation. This represents a change in shares of -2.10% 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)
2026-04-29 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 54,656 -1,171 -2.10 54,461 13.13 11.1875
2026-01-23 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 55,827 40 0.07 48,142 -6.77 9.5867
2025-10-20 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 55,787 233 0.42 51,638 -6.08 10.3942
2025-08-04 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 55,554 -1,084 -1.91 54,982 2.64 12.0810
2025-04-25 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 56,638 23 0.04 53,567 3.26 12.7312
2025-01-30 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 56,615 1,574 2.86 51,875 6.31 11.2840
2024-11-07 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 55,041 921 1.70 48,795 6.07 11.4108
2024-07-25 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 54,120 -527 -0.96 46,001 14.90 15.2600
2024-05-06 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 54,647 -567 -1.03 40,036 9.85 14.8759
2024-01-18 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 55,214 530 0.97 36,446 17.97 14.7424
2023-10-26 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 54,684 553 1.02 30,894 6.01 14.2835
2023-08-03 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 54,131 -67 -0.12 29,143 8.22 13.1066
2023-04-13 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 54,198 143 0.26 26,929 9.13 13.5889
2023-02-03 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 54,055 525 0.98 24,676 -2.93 14.2333
2022-10-24 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 53,530 1,019 1.94 25,421 1.43 13.9642
2022-07-27 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 52,511 -1,059 -1.98 25,062 -19.96 13.7081
2022-05-02 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 53,570 -525 -0.97 31,310 1.95 12.6961
2022-01-31 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 54,095 4,782 9.70 30,710 37.99 11.6386
2021-11-05 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 49,313 -7,003 -12.44 22,256 -0.12 9.7240
2021-07-22 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 56,316 508 0.91 22,283 13.65 9.5497
2021-05-06 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 55,808 955 1.74 19,607 -5.13 9.3696
2021-01-29 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 54,853 -1,565 -2.77 20,668 3.21 10.4759
2020-11-09 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 56,418 -1,284 -2.23 20,026 14.46 11.2359
2020-07-30 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 57,702 2,250 4.06 17,496 10.66 11.2275
2020-04-16 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 55,452 3,061 5.84 15,811 2.48 12.9874
2020-01-28 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 52,391 980 1.91 15,428 4.16 11.5137
2019-10-30 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 51,411 1,805 3.64 14,812 12.99 12.2839
2019-08-01 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 49,606 -1,453 -2.85 13,109 6.03 10.8145
2019-05-23 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 51,059 607 1.20 12,363 20.29 10.4966
2019-01-29 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 50,452 50,452 10,278 10.2257
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.