Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionJump Financial, LLC
Latest Disclosed Ownership2,628 shares
Latest Disclosed Value $ 2,618,618
Jump Financial, LLC reports 93.46% decrease in ownership of COST / Costco Wholesale Corporation

On May 14, 2026 - Jump Financial, LLC filed a 13F-HR form disclosing ownership of 2,628 shares of Costco Wholesale Corporation (MX:COST) valued at $2,618,618 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 40,207 shares of Costco Wholesale Corporation. This represents a change in shares of -93.46% 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 Common Stock 22160K105 2,628 -37,579 -93.46 2,619 -92.45 0.0349
2026-02-17 2025-12-31 13F Costco Wholesale Common Stock 22160K105 40,207 24,386 154.14 34,672 136.77 0.4259
2025-11-13 2025-09-30 13F Costco Wholesale Common Stock 22160K105 15,821 -40,548 -71.93 14,644 -73.76 0.1752
2025-08-13 2025-06-30 13F Costco Wholesale Common Stock 22160K105 56,369 55,930 12,740.32 55,802 13,346.02 0.6146
2025-05-14 2025-03-31 13F Costco Wholesale Common Stock 22160K105 439 -4,429 -90.98 415 -90.70 0.0057
2025-02-13 2024-12-31 13F Costco Wholesale Common Stock 22160K105 4,868 -4,154 -46.04 4,460 -44.24 0.0931
2024-11-14 2024-09-30 13F Costco Wholesale Common Stock 22160K105 9,022 -23,596 -72.34 7,998 -71.15 0.1631
2024-11-14 2024-06-30 13F/A-1 Costco Wholesale Common Stock 22160K105 32,618 11,014 50.98 27,725 75.17 0.5540
2024-08-14 2024-06-30 13F COSTCO WHSL CORP Common Stock 22160K105 32,618 11,014 27,725 0.5540
2024-05-13 2024-03-31 13F COSTCO WHSL CORP Common Stock 22160K105 21,604 -2,043 -8.64 15,828 1.40 0.4333
2024-10-21 2023-12-31 13F/A-1 Costco Wholesale Common Stock 22160K105 23,647 9,870 71.64 15,609 100.54 0.5135
2024-02-07 2023-12-31 13F COSTCO WHSL CORP Common Stock 22160K105 23,647 9,870 15,609 0.5159
2024-10-21 2023-09-30 13F/A-1 Costco Wholesale Common Stock 22160K105 13,777 7,510 119.83 7,783 130.68 0.2940
2023-11-07 2023-09-30 13F COSTCO WHSL CORP Common Stock 22160K105 13,777 7,510 7,783 0.2977
2024-10-21 2023-06-30 13F/A-1 COSTCO WHOLESALE Common Stock 22160K105 6,267 2,936 88.14 3,374 103.87 0.1267
2023-08-07 2023-06-30 13F COSTCO WHSL CORP Common Stock 22160K105 6,267 2,936 3,374 0.1271
2024-10-21 2023-03-31 13F/A-1 Costco Wholesale Common Stock 22160K105 3,331 3,331 1,655 0.0688
2023-05-03 2023-03-31 13F COSTCO WHSL CORP Common Stock 22160K105 3,331 3,331 1,655 0.0688
2023-02-14 2022-12-31 13F COSTCO WHSL CORP Common Stock 22160K105 0 -3,920 -100.00 0 -100.00
2022-11-07 2022-09-30 13F COSTCO WHSL CORP Common Stock 22160K105 3,920 896 29.63 1,851 27.74 0.0725
2022-08-09 2022-06-30 13F COSTCO WHSL CORP Common Stock 22160K105 3,024 733 31.99 1,449 9.86 0.0626
2022-05-12 2022-03-31 13F COSTCO WHSL CORP Common Stock 22160K105 2,291 -558 -19.59 1,319 -18.43 0.0568
2022-02-10 2021-12-31 13F Costco Wholesale Common Stock 22160K105 2,849 2,294 413.33 1,617 549.40 0.1015
2021-11-12 2021-09-30 13F COSTCO WHSL CORP Common Stock 22160K105 555 -1,206 -68.48 249 -64.28 0.0180
2021-08-13 2021-06-30 13F COSTCO WHSL CORP Common Stock 22160K105 1,761 -203 -10.34 697 0.72 0.0673
2021-05-17 2021-03-31 13F COSTCO WHSL CORP Common Stock 22160K105 1,964 608 44.84 692 35.42 0.0646
2021-02-12 2020-12-31 13F COSTCO WHSL CORP Common Stock 22160K105 1,356 1,356 511 0.0869
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.