CME Group Inc.
BG ˙ BUL ˙ US12572Q1058
SecurityBG:MX4A / CME Group Inc.
InstitutionBanco Santander, S.A.
Latest Disclosed Ownership106,941 shares
Latest Disclosed Value $ 31,585,025
Banco Santander, S.A. reports 3.87% increase in ownership of MX4A / CME Group Inc.

On May 8, 2026 - Banco Santander, S.A. filed a 13F-HR form disclosing ownership of 106,941 shares of CME Group Inc. (BG:MX4A) valued at $31,585,025 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 102,952 shares of CME Group Inc.. This represents a change in shares of 3.87% 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)
2026-05-08 2026-03-31 13F CME GROUP COM 12572Q105 106,941 3,989 3.87 31,585 12.35 0.1492
2026-02-13 2025-12-31 13F CME GROUP COM 12572Q105 102,952 2,442 2.43 28,114 3.53 0.2105
2025-11-12 2025-09-30 13F CME GROUP COM 12572Q105 100,510 -461 -0.46 27,157 -2.42 0.2411
2025-08-01 2025-06-30 13F CME GROUP COM 12572Q105 100,971 -22,114 -17.97 27,830 -14.77 0.2643
2025-05-09 2025-03-31 13F CME GROUP COM 12572Q105 123,085 -23,211 -15.87 32,653 -3.89 0.3603
2025-02-07 2024-12-31 13F CME GROUP COM 12572Q105 146,296 36,484 33.22 33,974 40.21 0.4087
2024-11-12 2024-09-30 13F CME GROUP COM 12572Q105 109,812 61,054 125.22 24,230 152.79 0.2856
2024-07-29 2024-06-30 13F CME GROUP COM 12572Q105 48,758 0 0.00 9,586 -8.69 0.1188
2024-05-10 2024-03-31 13F CME GROUP COM 12572Q105 48,758 0 0.00 10,497 2.23 0.1265
2024-02-09 2023-12-31 13F CME GROUP COM 12572Q105 48,758 0 0.00 10,268 5.18 0.1213
2023-11-08 2023-09-30 13F CME GROUP COM 12572Q105 48,758 0 0.00 9,762 8.06 0.1384
2023-08-14 2023-06-30 13F CME GROUP COM 12572Q105 48,758 0 0.00 9,034 -3.26 0.1185
2023-05-10 2023-03-31 13F CME GROUP COM 12572Q105 48,758 -348 -0.71 9,338 13.09 0.1398
2023-02-13 2022-12-31 13F CME GROUP COM 12572Q105 49,106 348 0.71 8,258 -4.40 0.1240
2022-11-08 2022-09-30 13F CME GROUP COM 12572Q105 48,758 0 0.00 8,637 -13.47 0.1152
2022-07-28 2022-06-30 13F CME GROUP COM 12572Q105 48,758 0 0.00 9,981 -13.94 0.1330
2022-05-09 2022-03-31 13F CME GROUP COM 12572Q105 48,758 -1,687 -3.34 11,598 0.64 0.1245
2022-02-09 2021-12-31 13F CME GROUP COM 12572Q105 50,445 1,687 3.46 11,524 22.22 0.0621
2021-11-08 2021-09-30 13F CME GROUP COM 12572Q105 48,758 0 0.00 9,429 -9.07 0.0507
2021-07-29 2021-06-30 13F CME GROUP COM 12572Q105 48,758 -17 -0.03 10,370 4.11 0.0579
2021-05-10 2021-03-31 13F CME GROUP COM 12572Q105 48,775 -4,851 -9.05 9,961 2.04 0.0702
2021-02-12 2020-12-31 13F CME GROUP COM 12572Q105 53,626 -551 -1.02 9,762 7.69 0.0700
2020-11-09 2020-09-30 13F CME GROUP COM 12572Q105 54,177 642 1.20 9,065 4.17 0.1192
2020-08-05 2020-06-30 13F CME GROUP COM 12572Q105 53,535 -53,347 -49.91 8,702 -52.91 0.1129
2020-05-11 2020-03-31 13F CME GROUP COM 12572Q105 106,882 -4,107 -3.70 18,481 -17.04 0.2116
2020-02-07 2019-12-31 13F CME GROUP COM 12572Q105 110,989 4,016 3.75 22,278 -1.46 0.2058
2019-11-06 2019-09-30 13F CME GROUP COM 12572Q105 106,973 14 0.01 22,609 8.90 0.2199
2019-08-07 2019-06-30 13F CME GROUP COM 12572Q105 106,959 220 0.21 20,762 18.19 0.2107
2019-05-13 2019-03-31 13F CME GROUP COM CL A 12572Q105 106,739 -1,445 -1.34 17,567 -19.96 0.1983
2019-02-12 2018-12-31 13F CME GROUP COM CL A 12572Q105 108,184 -3,531 -3.16 21,949 15.43 0.2774
2018-11-13 2018-09-30 13F CME GROUP COM CL A 12572Q105 111,715 61,015 120.35 19,015 128.82 0.2170
2018-08-14 2018-06-30 13F CME GROUP COM CL A 12572Q105 50,700 1,942 3.98 8,310 5.38 0.0968
2018-05-14 2018-03-31 13F CME GROUP COM CL A 12572Q105 48,758 0 0.00 7,886 10.74 0.0922
2018-02-14 2017-12-31 13F CME GROUP COM CL A 12572Q105 48,758 0 0.00 7,121 7.65 0.1020
2017-11-13 2017-09-30 13F CME GROUP COM CL A 12572Q105 48,758 0 0.00 6,615 8.34 0.1091
2017-08-11 2017-06-30 13F CME GROUP COM 12572Q105 48,758 0 0.00 6,106 -8.06 0.1198
2017-05-12 2017-03-31 13F CME GROUP COM 12572Q105 48,758 -40,032 -45.09 6,641 -36.78 0.1713
2017-02-17 2016-12-31 13F/A-1 CME GROUP COM 12572Q105 88,790 88,790 10,505 0.2768
2017-02-14 2016-12-31 13F CME GROUP COM 12572Q105 88,790 10,505
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.