Cboe Global Markets, Inc.
US ˙ BATS ˙ US12503M1080

SecurityCBOE / Cboe Global Markets, Inc.
InstitutionWestpac Banking Corp
Latest Disclosed Ownership443 shares
Latest Disclosed Value $ 124,514
Westpac Banking Corp ownership in CBOE / Cboe Global Markets, Inc.

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 443 shares of Cboe Global Markets, Inc. (US:CBOE) valued at $124,514 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 443 shares of Cboe Global Markets, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $126,299 USD.

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 CBOE GLOBAL MKTS COM 12503M108 443 0 0.00 125 11.71 0.0043
2026-02-10 2025-12-31 13F CBOE GLOBAL MKTS COM 12503M108 443 0 0.00 111 2.78 0.0070
2025-11-14 2025-09-30 13F/A-1 CBOE GLOBAL MARKETS INC USD COM 12503M108 443 227 105.09 109 116.00 0.0067
2025-11-12 2025-09-30 13F CBOE GLOBAL MARKETS INC USD COM 12503M108 443 227 109 0.0027
2025-08-11 2025-06-30 13F CBOE GLOBAL MKTS COM 12503M108 216 0 0.00 50 4.17 0.0034
2025-05-13 2025-03-31 13F CBOE GLOBAL MKTS COM 12503M108 216 0 0.00 49 14.29 0.0036
2025-02-12 2024-12-31 13F CBOE GLOBAL MKTS COM 12503M108 216 0 0.00 42 -4.55 0.0028
2024-11-08 2024-09-30 13F CBOE GLOBAL MKTS COM 12503M108 216 0 0.00 44 22.22 0.0030
2024-08-14 2024-06-30 13F/A-1 CBOE GLOBAL MKTS COM 12503M108 216 0 0.00 37 -7.69 0.0029
2024-08-13 2024-06-30 13F CBOE GLOBAL MKTS COM 12503M108 170 -46 37 0.0013
2024-05-09 2024-03-31 13F CBOE GLOBAL MKTS COM 12503M108 216 0 0.00 40 2.63 0.0030
2024-02-08 2023-12-31 13F CBOE GLOBAL MKTS COM 12503M108 216 0 0.00 39 15.15 0.0032
2023-11-13 2023-09-30 13F CBOE GLOBAL MKTS COM 12503M108 216 0 0.00 34 13.79 0.0025
2023-08-10 2023-06-30 13F CBOE GLOBAL MKTS COM 12503M108 216 -7,953 -97.36 30 -97.35 0.0021
2023-05-04 2023-03-31 13F CBOE GLOBAL MKTS COM 12503M108 8,169 0 0.00 1,097 7.03 0.0147
2023-02-06 2022-12-31 13F CBOE GLOBAL MKTS COM 12503M108 8,169 76 0.94 1,025 7.90 0.0152
2022-11-08 2022-09-30 13F CBOE GLOBAL MKTS COM 12503M108 8,093 0 0.00 950 3.60 0.0145
2022-08-10 2022-06-30 13F CBOE GLOBAL MKTS COM 12503M108 8,093 0 0.00 916 -1.08 0.0119
2022-05-11 2022-03-31 13F CBOE GLOBAL MKTS COM 12503M108 8,093 -88 -1.08 926 -13.13 0.0106
2022-02-08 2021-12-31 13F CBOE GLOBAL MKTS COM 12503M108 8,181 228 2.87 1,067 8.22 0.0111
2021-10-27 2021-09-30 13F CBOE GLOBAL MKTS COM 12503M108 7,953 0 0.00 985 4.12 0.0105
2021-08-11 2021-06-30 13F CBOE GLOBAL MKTS COM 12503M108 7,953 -3,238 -28.93 947 -14.31 0.0095
2021-05-13 2021-03-31 13F CBOE GLOBAL MKTS COM 12503M108 11,191 -2,318 -17.16 1,104 -12.17 0.0122
2021-02-11 2020-12-31 13F CBOE GLOBAL MKTS COM 12503M108 13,509 4,068 43.09 1,258 51.81 0.0143
2020-11-10 2020-09-30 13F CBOE GLOBAL MARKETS COM 12503M108 9,441 1,488 18.71 828 11.74 0.0112
2020-08-12 2020-06-30 13F CBOE GLOBAL MARKETS COM 12503M108 7,953 0 0.00 742 4.51 0.0111
2020-05-14 2020-03-31 13F CBOE GLOBAL MARKETS COM 12503M108 7,953 0 0.00 710 -25.68 0.0122
2020-02-11 2019-12-31 13F CBOE GLOBAL MARKETS COM 12503M108 7,953 -105,469 -92.99 954 -92.68 0.0123
2019-11-13 2019-09-30 13F CBOE GLOBAL MARKETS COM 12503M108 113,422 -27,891 -19.74 13,033 -11.00 0.1812
2019-08-01 2019-06-30 13F CBOE GLOBAL MARKETS COM 12503M108 141,313 13,350 10.43 14,644 19.91 0.2236
2019-05-14 2019-03-31 13F CBOE GLOBAL MARKETS COM 12503M108 127,963 -26,500 -17.16 12,213 -19.18 0.2016
2019-02-07 2018-12-31 13F CBOE GLOBAL MARKETS COM 12503M108 154,463 24,210 18.59 15,111 20.90 0.2575
2018-11-13 2018-09-30 13F CBOE GLOBAL MARKETS COM 12503M108 130,253 10,700 8.95 12,499 0.47 0.2143
2018-07-18 2018-06-30 13F CBOE GLOBAL MARKETS COM 12503M108 119,553 67,500 129.68 12,442 109.48 0.2391
2018-05-01 2018-03-31 13F CBOE GLOBAL MARKETS COM 12503M108 52,053 44,100 554.51 5,939 499.90 0.1186
2018-01-18 2017-12-31 13F CBOE GLOBAL MARKETS COM 12503M108 7,953 0 0.00 991 15.79 0.0225
2017-10-30 2017-09-30 13F CBOE HLDGS COM 12503M108 7,953 -192 -2.36 856 14.92 0.0188
2017-08-09 2017-06-30 13F CBOE HLDGS COM 12503M108 8,145 -1,190,557 -99.32 744 -99.23 0.0164
2017-05-18 2017-03-31 13F/A-1 CBOE HLDGS COM 12503M108 1,198,702 3,330 0.28 97,179 10.02 0.7788
2017-05-11 2017-03-31 13F CBOE HLDGS COM 12503M108 1,092,893 97,179
2017-02-09 2016-12-31 13F CBOE HLDGS COM 12503M108 1,195,372 -158,189 -11.69 88,326 0.62 0.8330
2016-11-10 2016-09-30 13F CBOE HLDGS COM 12503M108 1,353,561 -183,363 -11.93 87,778 -14.27 0.9482
2016-08-10 2016-06-30 13F CBOE HLDGS COM 12503M108 1,536,924 11,960 0.78 102,390 2.77 1.1209
2016-05-13 2016-03-31 13F CBOE HLDGS COM 12503M108 1,524,964 -380,771 -19.98 99,626 -19.45 1.0830
2016-02-11 2015-12-31 13F CBOE HLDGS COM 12503M108 1,905,735 1,888,135 10,728.04 123,682 10,381.53 1.3682
2015-11-16 2015-09-30 13F/A-1 CBOE HLDGS COM 12503M108 17,600 -16,200 -47.93 1,181 -38.99 0.0130
2015-11-12 2015-09-30 13F CBOE HLDGS COM 12503M108 17,600 1,181
2015-08-12 2015-06-30 13F CBOE HLDGS COM 12503M108 33,800 -3,400 -9.14 1,934 -9.41 0.0189
2015-05-12 2015-03-31 13F CBOE HLDGS COM 12503M108 37,200 0 0.00 2,135 -9.50 0.0186
2015-02-11 2014-12-31 13F CBOE HLDGS COM 12503M108 37,200 0 0.00 2,359 18.48 0.0224
2014-11-12 2014-09-30 13F CBOE HLDGS COM 12503M108 37,200 0 0.00 1,991 8.80 0.0194
2014-08-11 2014-06-30 13F CBOE HLDGS COM 12503M108 37,200 -8,600 -18.78 1,831 -29.40 0.0176
2014-05-12 2014-03-31 13F CBOE HLDGS COM 12503M108 45,800 0 0.00 2,592 8.95 0.0276
2014-02-13 2013-12-31 13F CBOE HLDGS COM 12503M108 45,800 -96,900 -67.90 2,380 -63.14 0.0272
2013-11-12 2013-09-30 13F CBOE HLDGS COM 12503M108 142,700 21,000 17.26 6,454 43.58 0.0807
2013-08-14 2013-06-30 13F CBOE HLDGS COM 12503M108 121,700 121,700 4,496 0.0687
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.