Segment and Geographic Information

12 Months Ended

Dec. 31, 2017

13. Segment and Geographic Information

The Company operates an electronic multi-party platform for the trading of fixed-income securities and provides related data, analytics, compliance tools and post-trade services. The Company’s operations constitute a single business segment because of the highly integrated nature of these product and services, of the financial markets in which the Company competes and of the Company’s worldwide business activities. The Company believes that results by geographic region or client sector are not necessarily meaningful in understanding its business.

For the years ended December 31, 2017, 2016 and 2015, the U.K. was the only individual foreign country in which the Company had a subsidiary that accounted for 10% or more of the total revenues or total long-lived assets. Revenues and long-lived assets are attributed to geographic area based on the location of the particular subsidiary. Long-lived assets are defined as furniture, equipment, leasehold improvements and capitalized software. Information regarding revenue for the three years ended December 31, 2017, 2016 and 2015 and long-lived assets as of December 31, 2017 and 2016 follows:

	Year Ended December 31,
	2017		2016		2015
	(In thousands)
Revenues
United States	$	336,867	$	314,343	$	262,558
United Kingdom		59,151		54,015		39,338
Other		1,453		1,561		1,202
Total	$	397,471	$	369,919	$	303,098

	As of December 31,
	2017		2016
	(In thousands)
Long-lived assets, as defined
United States	$	27,990	$	23,370
United Kingdom		10,532		7,713
Other		26		21
Total	$	38,548	$	31,104