CME Group Inc.
BG ˙ BUL ˙ US12572Q1058
SecurityBG:MX4A / CME Group Inc.
InstitutionWindward Capital Management Co /ca
Latest Disclosed Ownership112,707 shares
Latest Disclosed Value $ 33,287,918
Windward Capital Management Co /ca reports 34.45% increase in ownership of MX4A / CME Group Inc.

On May 13, 2026 - Windward Capital Management Co /ca filed a 13F-HR form disclosing ownership of 112,707 shares of CME Group Inc. (BG:MX4A) valued at $33,287,918 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 83,827 shares of CME Group Inc.. This represents a change in shares of 34.45% 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)
2026-05-13 2026-03-31 13F CME GROUP COM 12572Q105 112,707 28,880 34.45 33,288 45.42 2.7109
2026-01-28 2025-12-31 13F CME GROUP COM 12572Q105 83,827 -3,265 -3.75 22,891 -2.72 1.8133
2025-10-30 2025-09-30 13F CME GROUP COM 12572Q105 87,092 -517 -0.59 23,531 -2.55 1.8765
2025-08-12 2025-06-30 13F CME GROUP COM 12572Q105 87,609 -687 -0.78 24,147 3.09 2.0489
2025-05-13 2025-03-31 13F CME GROUP COM 12572Q105 88,296 786 0.90 23,424 15.26 2.0203
2025-01-27 2024-12-31 13F CME GROUP COM 12572Q105 87,510 -682 -0.77 20,322 4.43 1.5537
2024-11-01 2024-09-30 13F CME GROUP COM 12572Q105 88,192 381 0.43 19,460 12.71 1.4848
2024-08-06 2024-06-30 13F CME GROUP COM 12572Q105 87,811 -1,687 -1.88 17,264 -10.40 1.4530
2024-09-20 2024-03-31 13F/A-1 CME GROUP COM 12572Q105 89,498 1,344 1.52 19,268 106,944.44 1.6082
2024-05-07 2024-03-31 13F CME GROUP COM 12572Q105 89,498 1,344 19,268 1.6082
2024-10-03 2023-12-31 13F/A-1 CME GROUP COM 12572Q105 88,154 -134 -0.15 19 5.88 1.6097
2024-01-16 2023-12-31 13F CME GROUP INC COM 12572Q105 88,154 -134 19 1.5873
2024-10-03 2023-09-30 13F/A-1 CME GROUP COM 12572Q105 88,288 -897 -1.01 18 6.25 1.7307
2023-10-20 2023-09-30 13F CME GROUP INC COM 12572Q105 88,288 -897 18 1.7073
2023-07-18 2023-06-30 13F CME GROUP INC COM 12572Q105 89,185 112 0.13 17 -5.88 1.4922
2023-04-24 2023-03-31 13F CME GROUP INC COM 12572Q105 89,073 -327 -0.37 17 13.33 1.5725
2023-01-06 2022-12-31 13F CME GROUP INC COM 12572Q105 89,400 -406 -0.45 15 -99.91 1.6310
2022-10-14 2022-09-30 13F CME GROUP INC COM 12572Q105 89,806 232 0.26 15,908 -13.24 1.7987
2022-07-08 2022-06-30 13F CME GROUP INC COM 12572Q105 89,574 518 0.58 18,336 -13.44 1.9732
2022-04-20 2022-03-31 13F CME GROUP INC COM 12572Q105 89,056 -359 -0.40 21,183 3.70 1.8903
2022-01-14 2021-12-31 13F CME GROUP INC COM 12572Q105 89,415 268 0.30 20,428 18.50 1.6920
2021-10-12 2021-09-30 13F CME GROUP INC COM 12572Q105 89,147 50 0.06 17,239 -9.02 1.5976
2021-07-19 2021-06-30 13F CME GROUP INC COM 12572Q105 89,097 -59 -0.07 18,949 4.07 1.7609
2021-04-15 2021-03-31 13F CME GROUP INC COM 12572Q105 89,156 -367 -0.41 18,208 11.72 1.8207
2021-01-21 2020-12-31 13F CME GROUP INC COM 12572Q105 89,523 -9,876 -9.94 16,298 -2.00 1.6419
2020-10-13 2020-09-30 13F CME GROUP INC COM 12572Q105 99,399 -765 -0.76 16,630 2.15 1.6799
2020-07-20 2020-06-30 13F CME GROUP INC COM 12572Q105 100,164 -1,616 -1.59 16,280 -7.49 1.8441
2020-04-14 2020-03-31 13F CME GROUP INC COM 12572Q105 101,780 -3,889 -3.68 17,598 -17.03 2.3565
2020-01-14 2019-12-31 13F CME GROUP INC COM 12572Q105 105,669 3,487 3.41 21,210 -1.78 2.2653
2019-10-11 2019-09-30 13F CME GROUP INC COM COM 12572Q105 102,182 1,540 1.53 21,595 10.54 2.5822
2019-07-11 2019-06-30 13F CME GROUP INC COM COM 12572Q105 100,642 -1,339 -1.31 19,536 16.39 2.4349
2019-04-12 2019-03-31 13F CME GROUP INC COM CL A COM 12572Q105 101,981 -21 -0.02 16,785 -12.52 2.1460
2019-01-15 2018-12-31 13F CME GROUP INC COM CL A COM 12572Q105 102,002 1,010 1.00 19,188 11.62 2.7658
2018-10-10 2018-09-30 13F CME GROUP INC COM CL A COM 12572Q105 100,992 585 0.58 17,190 4.44 2.1374
2018-07-12 2018-06-30 13F CME GROUP INC COM CL A COM 12572Q105 100,407 -140 -0.14 16,459 1.21 2.3237
2018-04-12 2018-03-31 13F CME GROUP INC COM CL A COM 12572Q105 100,547 3,419 3.52 16,262 14.64 2.3691
2018-01-10 2017-12-31 13F CME GROUP INC COM CL A COM 12572Q105 97,128 2,456 2.59 14,185 10.43 2.1034
2017-10-17 2017-09-30 13F CME GROUP INC COM CL A COM 12572Q105 94,672 -330 -0.35 12,845 7.96 2.1069
2017-07-17 2017-06-30 13F CME GROUP COM 12572Q105 95,002 459 0.49 11,898 5.94 2.0232
2017-04-21 2017-03-31 13F CME GROUP COM 12572Q105 94,543 3,466 3.81 11,231 6.91 1.9974
2017-01-23 2016-12-31 13F CME GROUP COM 12572Q105 91,077 86,891 2,075.75 10,505 2,298.40 2.0021
2016-10-14 2016-09-30 13F CME GROUP COM 12572Q105 4,186 1,560 59.41 438 71.09 0.0817
2016-07-14 2016-06-30 13F CME GROUP COM 12572Q105 2,626 25 0.96 256 2.40 0.0496
2016-04-20 2016-03-31 13F CME GROUP COM 12572Q105 2,601 2,601 250 0.0487
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.