Non-Controlling Interests (Tables)

9 Months Ended

Sep. 30, 2020

Noncontrolling Interest [Abstract]

Summary of the ownership interest in noncontrolling interest

The following table summarizes the ownership interest in Tradeweb Markets LLC:

	September 30, 2020			September 30, 2019
	LLC Interests	Ownership %		LLC Interests	Ownership %
Number of LLC Interests held by Tradeweb Markets Inc.	187,918,774	82.6	%	142,942,945	64.3	%
Number of LLC Interests held by non-controlling interests	39,513,246	17.4	%	79,289,005	35.7	%
Total LLC Interests outstanding	227,432,020	100.0	%	222,231,950	100.0	%

Summary of the impact on equity due to changes in the Company’s ownership interest in noncontrolling interest

The following table summarizes the impact on equity due to changes in the Corporation’s ownership interest in Tradeweb Markets LLC (in thousands):

Net Income Attributable to Tradeweb Markets Inc. and Transfers (to) from the Non-Controlling Interests	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Net income attributable to Tradeweb Markets Inc.	$	36,812	$	29,612	$	111,236	$	42,440
Transfers (to) from non-controlling interests:
Change in non-controlling interests as a result of ownership changes	(1,478)		73		423,339		(1,607,456)
Net transfers (to) from non-controlling interests	(1,478)		73		423,339		(1,607,456)
Change from net income attributable to Tradeweb Markets Inc. and transfers (to) from non-controlling interests	$	35,334	$	29,685	$	534,575	$	(1,565,016)