CME Group Inc.
BG ˙ BUL ˙ US12572Q1058
SecurityBG:MX4A / CME Group Inc.
InstitutionLeft Brain Wealth Management, LLC
Latest Disclosed Ownership11,484 shares
Latest Disclosed Value $ 3,391,799
Left Brain Wealth Management, LLC reports 0.80% increase in ownership of MX4A / CME Group Inc.

On April 30, 2026 - Left Brain Wealth Management, LLC filed a 13F-HR form disclosing ownership of 11,484 shares of CME Group Inc. (BG:MX4A) valued at $3,391,799 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 11,393 shares of CME Group Inc.. This represents a change in shares of 0.80% 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)
2026-04-30 2026-03-31 13F CME GROUP COM 12572Q105 11,484 91 0.80 3,392 9.00 1.3322
2026-02-05 2025-12-31 13F CME GROUP COM 12572Q105 11,393 13 0.11 3,111 1.20 1.0762
2025-11-12 2025-09-30 13F CME GROUP COM 12572Q105 11,380 -153 -1.33 3,075 -3.27 0.9650
2025-08-12 2025-06-30 13F CME GROUP COM 12572Q105 11,533 11,533 3,179 1.1201
2025-02-10 2024-12-31 13F CHICAGO MERCANTILE HLDGS COM 12572Q105 0 -2,859 -100.00 0 -100.00
2024-11-12 2024-09-30 13F CHICAGO MERCANTILE HLDGS COM 12572Q105 2,859 -170 -5.61 631 5.88 0.2934
2024-08-06 2024-06-30 13F CHICAGO MERCANTILE HLDGS COM 12572Q105 3,029 -95 -3.04 596 -11.46 0.2781
2024-05-09 2024-03-31 13F CHICAGO MERCANTILE HLDGS COM 12572Q105 3,124 -45 -1.42 673 0.75 0.3257
2024-02-14 2023-12-31 13F CHICAGO MERCANTILE HLDGS COM 12572Q105 3,169 20 0.64 667 5.87 0.3859
2023-11-13 2023-09-30 13F CHICAGO MERCANTILE HLDGS COM 12572Q105 3,149 67 2.17 630 10.33 0.3923
2023-08-04 2023-06-30 13F CHICAGO MERCANTILE HLDGS COM 12572Q105 3,082 135 4.58 571 4.39 0.3484
2023-05-11 2023-03-31 13F CHICAGO MERCANTILE HLDGS COM 12572Q105 2,947 2,947 547 0.3723
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.