CME Group Inc.
BG ˙ BUL ˙ US12572Q1058
SecurityBG:MX4A / CME Group Inc.
InstitutionWestpac Banking Corp
Latest Disclosed Ownership33,561 shares
Latest Disclosed Value $ 9,912,242
Westpac Banking Corp reports 25.44% decrease in ownership of MX4A / CME Group Inc.

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 33,561 shares of CME Group Inc. (BG:MX4A) valued at $9,912,242 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 45,014 shares of CME Group Inc.. This represents a change in shares of -25.44% 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)
2026-05-11 2026-03-31 13F CME GROUP COM 12572Q105 33,561 -11,453 -25.44 9,912 -19.36 0.3452
2026-02-10 2025-12-31 13F CME GROUP COM 12572Q105 45,014 -7,500 -14.28 12,292 -13.36 0.7765
2025-11-14 2025-09-30 13F/A-1 CME GROUP INC USD 0.01 COM 12572Q105 52,514 11,553 28.20 14,189 25.68 0.8793
2025-11-12 2025-09-30 13F CME GROUP INC USD 0.01 COM 12572Q105 52,514 11,553 14,189 0.3561
2025-08-11 2025-06-30 13F CME GROUP COM 12572Q105 40,961 8,295 25.39 11,290 30.28 0.7547
2025-05-13 2025-03-31 13F CME GROUP COM 12572Q105 32,666 -1,589 -4.64 8,666 8.93 0.6376
2025-02-12 2024-12-31 13F CME GROUP COM 12572Q105 34,255 24,626 255.75 7,955 274.53 0.5279
2024-11-08 2024-09-30 13F CME GROUP COM 12572Q105 9,629 4,732 96.63 2,125 120.79 0.1424
2024-08-14 2024-06-30 13F/A-1 CME GROUP COM 12572Q105 4,897 1,787 57.46 963 43.80 0.0764
2024-08-13 2024-06-30 13F CME GROUP COM 12572Q105 2,889 -221 963 0.0331
2024-05-09 2024-03-31 13F CME GROUP COM 12572Q105 3,110 758 32.23 670 35.15 0.0510
2024-02-08 2023-12-31 13F CME GROUP COM 12572Q105 2,352 584 33.03 495 40.23 0.0408
2023-11-13 2023-09-30 13F CME GROUP COM 12572Q105 1,768 130 7.94 354 16.50 0.0265
2023-08-10 2023-06-30 13F CME GROUP COM 12572Q105 1,638 -97,546 -98.35 304 -98.40 0.0214
2023-05-04 2023-03-31 13F CME GROUP COM 12572Q105 99,184 15,308 18.25 18,996 34.68 0.2554
2023-02-06 2022-12-31 13F CME GROUP COM 12572Q105 83,876 2,313 2.84 14,105 -2.37 0.2085
2022-11-08 2022-09-30 13F CME GROUP COM 12572Q105 81,563 -72,221 -46.96 14,447 -54.11 0.2202
2022-08-10 2022-06-30 13F CME GROUP COM 12572Q105 153,784 11,934 8.41 31,480 -6.70 0.4101
2022-05-11 2022-03-31 13F CME GROUP COM 12572Q105 141,850 -7,851 -5.24 33,740 5.22 0.3871
2022-02-08 2021-12-31 13F CME GROUP COM 12572Q105 149,701 57,239 61.91 32,066 79.33 0.3322
2021-10-27 2021-09-30 13F CME GROUP COM 12572Q105 92,462 -24,215 -20.75 17,880 -27.94 0.1911
2021-08-11 2021-06-30 13F CME GROUP COM 12572Q105 116,677 81,224 229.10 24,815 242.73 0.2492
2021-05-13 2021-03-31 13F CME GROUP COM 12572Q105 35,453 2,829 8.67 7,241 21.91 0.0799
2021-02-11 2020-12-31 13F CME GROUP COM 12572Q105 32,624 21 0.06 5,939 8.89 0.0674
2020-11-10 2020-09-30 13F CME GROUP COM 12572Q105 32,603 3,436 11.78 5,455 15.06 0.0739
2020-08-12 2020-06-30 13F CME GROUP COM 12572Q105 29,167 -65,396 -69.16 4,741 -71.01 0.0707
2020-05-14 2020-03-31 13F CME GROUP COM 12572Q105 94,563 -78,194 -45.26 16,351 -52.85 0.2817
2020-02-11 2019-12-31 13F CME GROUP COM 12572Q105 172,757 34,165 24.65 34,676 18.39 0.4463
2019-11-13 2019-09-30 13F CME GROUP COM 12572Q105 138,592 26,756 23.92 29,290 34.93 0.4073
2019-08-01 2019-06-30 13F CME GROUP COM 12572Q105 111,836 -19,387 -14.77 21,708 0.52 0.3315
2019-05-14 2019-03-31 13F CME GROUP COM CL A 12572Q105 131,223 51,225 64.03 21,597 43.50 0.3565
2019-02-07 2018-12-31 13F CME GROUP COM CL A 12572Q105 79,998 -53,155 -39.92 15,049 -33.60 0.2565
2018-11-13 2018-09-30 13F CME GROUP COM CL A 12572Q105 133,153 25,500 23.69 22,664 28.43 0.3886
2018-07-18 2018-06-30 13F CME GROUP COM CL A 12572Q105 107,653 33,485 45.15 17,646 47.11 0.3391
2018-05-01 2018-03-31 13F CME GROUP COM CL A 12572Q105 74,168 52,200 237.62 11,996 273.91 0.2396
2018-01-18 2017-12-31 13F CME GROUP COM CL A 12572Q105 21,968 0 0.00 3,208 7.65 0.0729
2017-10-30 2017-09-30 13F CME GROUP COM CL A 12572Q105 21,968 -13,560 -38.17 2,981 -33.02 0.0656
2017-08-09 2017-06-30 13F CME GROUP COM 12572Q105 35,528 -786,427 -95.68 4,450 -95.44 0.0980
2017-05-18 2017-03-31 13F/A-1 CME GROUP COM 12572Q105 821,955 1,666 0.20 97,648 3.11 0.7826
2017-05-11 2017-03-31 13F CME GROUP COM 12572Q105 775,051 98,669
2017-02-09 2016-12-31 13F CME GROUP COM 12572Q105 820,289 -136,127 -14.23 94,702 -5.26 0.8931
2016-11-10 2016-09-30 13F CME GROUP COM 12572Q105 956,416 -137,691 -12.58 99,965 -6.20 1.0798
2016-08-10 2016-06-30 13F CME GROUP COM 12572Q105 1,094,107 -5,714 -0.52 106,566 0.88 1.1666
2016-05-13 2016-03-31 13F CME GROUP COM 12572Q105 1,099,821 -33,124 -2.92 105,638 2.92 1.1484
2016-02-11 2015-12-31 13F CME GROUP COM 12572Q105 1,132,945 1,098,171 3,158.02 102,645 3,083.75 1.1355
2015-11-16 2015-09-30 13F/A-1 CME GROUP COM 12572Q105 34,774 11,298 48.13 3,225 47.62 0.0355
2015-11-12 2015-09-30 13F CME GROUP COM 12572Q105 34,774 3,225
2015-08-12 2015-06-30 13F CME GROUP COM 12572Q105 23,476 -15,509 -39.78 2,185 -44.16 0.0214
2015-05-12 2015-03-31 13F CME GROUP COM 12572Q105 38,985 18,445 89.80 3,911 114.89 0.0340
2015-02-11 2014-12-31 13F CME GROUP COM 12572Q105 20,540 -800 -3.75 1,821 6.68 0.0173
2014-11-12 2014-09-30 13F CME GROUP COM 12572Q105 21,340 0 0.00 1,706 12.68 0.0166
2014-08-11 2014-06-30 13F CME GROUP COM 12572Q105 21,340 -114 -0.53 1,514 -4.60 0.0146
2014-05-12 2014-03-31 13F CME GROUP COM 12572Q105 21,454 1,595 8.03 1,588 1.86 0.0169
2014-02-13 2013-12-31 13F CME GROUP COM 12572Q105 19,859 -700 -3.40 1,558 2.64 0.0178
2013-11-12 2013-09-30 13F CME GROUP COM 12572Q105 20,559 -4,107 -16.65 1,519 -9.91 0.0190
2013-08-14 2013-06-30 13F CME GROUP COM 12572Q105 24,666 24,666 1,685 0.0258
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.