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Segment and Geographic Information | 12 Months Ended
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Dec. 31, 2025
Segment Reporting [Abstract] |
Segment and Geographic Information | 16. Segment and Geographic Information The Company’s end-to-end trading solutions comprise one reportable segment. The Company’s end-to-end trading solutions segment includes the operation of electronic platforms for the trading of fixed-income and other securities and related data, analytics, compliance tools, post-trade services and technology services. The Company derives revenue primarily in North America and Europe and manages its business activities on a consolidated basis. The Company considers its operations to constitute a single business segment due to the highly integrated nature of these products and services within the trading lifecycle, the use of a single inter-connected suite of technology solutions underlying all services, the financial markets in which the Company competes and the Company’s worldwide business activities. The accounting policies of the Company's reportable segment are the same as those described in the summary of significant accounting policies. The Company's chief operating decision maker (“CODM”) assesses performance of the Company overall and decides how to allocate resources based on net income that is reported on the consolidated statement of operations as net income. The measure of segment assets is reported on the consolidated statement of financial condition as total assets. The Company’s CODM is its Chief Executive Office r. The CODM uses net income to evaluate income generated from segment assets in deciding whether to reinvest profits into the Company’s end-to-end trading solutions or into other areas, such as for acquisitions or to pay dividends. Net income is used to monitor budget versus actual results. The significant segment expenses and net income reviewed by the CODM conform to the presentation of such items in the consolidated statements of operations. For the years ended December 31, 2025, 2024 and 2023, the U.K. was the only individual foreign country in which the Company had operations that accounted for 10.0% or more of the total revenues or total long-lived assets. Revenues and long-lived assets are attributed to a geographic area based on the location of the client trading activity and receipt of services. Long-lived assets are defined as furniture, equipment, leasehold improvements and capitalized software. Revenues for the years ended December 31, 2025, 2024 and 2023 and long-lived assets as of December 31, 2025 and 2024 were as follows:
| Year Ended December 31, |
| 2025 |  |  | 2024 |  |  | 2023 |
| (In thousands) |
Revenues |  |  |  |  |  |  |  |  |  |  |
United States | $ |  | 568,383 |  |  | $ |  | 568,595 |  |  | $ |  | 523,683 |
United Kingdom |  |  | 177,257 |  |  |  |  | 161,838 |  |  |  |  | 147,019 |
Other |  |  | 100,628 |  |  |  |  | 86,664 |  |  |  |  | 81,845 |
Total | $ |  | 846,268 |  |  | $ |  | 817,097 |  |  | $ |  | 752,547 |
| As of |
| December 31, 2025 |  |  | December 31, 2024 |
| (In thousands) |
Long-lived assets, as defined |  |  |  |  |  |  |
United States | $ |  | 99,849 |  |  | $ |  | 92,983 |
United Kingdom |  |  | 10,740 |  |  |  |  | 12,683 |
Other |  |  | 1,842 |  |  |  |  | 1,632 |
Total | $ |  | 112,431 |  |  | $ |  | 107,298 |

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- Definition The entire disclosure for reporting segments including data and tables. 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