萬事達卡公司
MX ˙ BMV ˙ US57636Q1040
SecurityMX:MA / Mastercard Incorporated
InstitutionCorundum Group, Inc.
Latest Disclosed Ownership2,480 shares
Latest Disclosed Value $ 1,239,157
Corundum Group, Inc. reports 51.22% increase in ownership of MA / Mastercard Incorporated

On April 20, 2026 - Corundum Group, Inc. filed a 13F-HR form disclosing ownership of 2,480 shares of Mastercard Incorporated (MX:MA) valued at $1,239,157 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 12, 2026 disclosing 1,640 shares of Mastercard Incorporated. This represents a change in shares of 51.22% 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)
2026-04-20 2026-03-31 13F MASTERCARD CS 57636Q104 2,480 840 51.22 1,239 32.37 0.4142
2026-01-12 2025-12-31 13F MASTERCARD CS 57636Q104 1,640 -703 -30.00 936 -29.73 0.3142
2025-10-24 2025-09-30 13F MASTERCARD CS 57636Q104 2,343 -59 -2.46 1,333 -1.26 0.5476
2025-07-21 2025-06-30 13F MASTERCARD CS 57636Q104 2,402 721 42.89 1,350 46.47 0.5968
2025-04-23 2025-03-31 13F MASTERCARD CS 57636Q104 1,681 -1,381 -45.10 921 -42.87 0.4419
2025-01-16 2024-12-31 13F MASTERCARD CS 57636Q104 3,062 1,536 100.66 1,612 114.08 0.6021
2024-10-21 2024-09-30 13F MASTERCARD CS 57636Q104 1,526 -1,390 -47.67 754 -41.45 0.3438
2024-07-17 2024-06-30 13F MASTERCARD CS 57636Q104 2,916 1,347 85.85 1,286 70.33 0.5026
2024-04-15 2024-03-31 13F MASTERCARD CS 57636Q104 1,569 -43 -2.67 756 9.90 0.3644
2024-01-24 2023-12-31 13F MASTERCARD CS 57636Q104 1,612 -80 -4.73 688 2.69 0.3447
2023-10-17 2023-09-30 13F MASTERCARD CS 57636Q104 1,692 -357 -17.42 670 -16.89 0.3806
2023-07-21 2023-06-30 13F MASTERCARD CS 57636Q104 2,049 -2,506 -55.02 806 -51.36 0.4019
2023-04-24 2023-03-31 13F MASTERCARD CS 57636Q104 4,555 1,342 41.77 1,655 165,400.00 0.7830
2023-01-12 2022-12-31 13F MASTERCARD CS 57636Q104 3,213 239 8.04 1 -99.88 0.6307
2022-10-18 2022-09-30 13F MASTERCARD CS 57636Q104 2,974 127 4.46 846 -5.79 0.5322
2022-07-25 2022-06-30 13F MASTERCARD CS 57636Q104 2,847 385 15.64 898 2.05 0.6067
2022-05-02 2022-03-31 13F MASTERCARD CS 57636Q104 2,462 884 56.02 880 55.20 0.8179
2022-02-07 2021-12-31 13F MASTERCARD CS 57636Q104 1,578 530 50.57 567 55.77 0.3692
2021-11-02 2021-09-30 13F MASTERCARD CS 57636Q104 1,048 -132 -11.19 364 -15.55 0.2699
2021-08-02 2021-06-30 13F MASTERCARD CS 57636Q104 1,180 38 3.33 431 5.90 0.2827
2021-05-10 2021-03-31 13F MASTERCARD CS 57636Q104 1,142 69 6.43 407 6.27 0.3181
2021-02-03 2020-12-31 13F MASTERCARD CS 57636Q104 1,073 104 10.73 383 16.77 0.3191
2020-11-12 2020-09-30 13F/A-1 MASTERCARD CS 57636Q104 969 49 5.33 328 20.59 0.3177
2020-08-07 2020-06-30 13F/A-1 MASTERCARD CS 57636Q104 920 26 2.91 272 25.93 0.3262
2020-05-07 2020-03-31 13F/A-1 MASTERCARD CS 57636Q104 894 192 27.35 216 2.86 0.3071
2020-01-28 2019-12-31 13F MASTERCARD CS 57636Q104 702 702 210 0.2205
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.