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INVESTMENTS (Tables) | 3 Months Ended
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Mar. 31, 2023
INVESTMENTS |
Schedule of investments | As of March 31, 2023 and December 31, 2022, the Company’s investments were comprised of the following (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
​ |  | 2023 |  | 2022
Equity method investments: | ​ | ​ | ​ | ​ | ​ | ​
Investment in 7Ridge Investments 3 LP | ​ | $ | 231.9 | ​ | $ | 215.4
Total equity method investments | ​ | ​ | 231.9 | ​ | ​ | 215.4
​ | ​ | ​ | ​ | ​ | ​ | ​
Other equity investments: | ​ | ​ | ​ | ​ | ​ | ​
Investment in Eris Innovations Holdings, LLC | ​ | ​ | 20.0 | ​ | ​ | 20.0
Investment in CSD Br | ​ | ​ | 5.9 | ​ | ​ | 5.9
Investment in Coin Metrics Inc. | ​ | ​ | 5.0 | ​ | ​ | 5.0
Investment in Cboe Vest Financial Group, Inc. | ​ | ​ | 2.9 | ​ | ​ | 2.9
Investment in Effective Investing Limited | ​ | ​ | 1.8 | ​ | ​ | 1.8
Investment in OCC | ​ | ​ | 0.3 | ​ | ​ | 0.3
Other equity investments | ​ |  | 1.9 | ​ |  | 1.9
Total other equity investments | ​ | ​ | 37.8 | ​ | ​ | 37.8
​ | ​ | ​ | ​ | ​ | ​ | ​
Total investments | ​ | $ | 269.7 | ​ | $ | 253.2
​

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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