Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock^F4,F1,F3	Aug 28, 2018	S	3,631	$55.24	D	331,034	I	See Footnotes
Class A Common Stock^F4,F2,F3	Aug 28, 2018	S	2,628	$55.24	D	239,576	I	See Footnotes
Class A Common Stock^F5,F1,F3	Aug 28, 2018	S	31,334	$56.11	D	299,700	I	See Footnotes
Class A Common Stock^F5,F2,F3	Aug 28, 2018	S	22,676	$56.11	D	216,900	I	See Footnotes
Class A Common Stock^F6,F1,F3	Aug 28, 2018	S	149	$56.65	D	299,551	I	See Footnotes
Class A Common Stock^F6,F2,F3	Aug 28, 2018	S	108	$56.65	D	216,792	I	See Footnotes
Class A Common Stock^F7,F1,F3	Aug 29, 2018	S	7,658	$56.22	D	291,893	I	See Footnotes
Class A Common Stock^F7,F2,F3	Aug 29, 2018	S	5,543	$56.22	D	211,249	I	See Footnotes
Class A Common Stock^F8,F1,F3	Aug 29, 2018	S	16,562	$56.67	D	275,331	I	See Footnotes
Class A Common Stock^F8,F2,F3	Aug 29, 2018	S	11,987	$56.67	D	199,262	I	See Footnotes

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1See Exhibit 99.1
F2See Exhibit 99.1
F3See Exhibit 99.1
F4See Exhibit 99.1
F5See Exhibit 99.1
F6See Exhibit 99.1
F7See Exhibit 99.1
F8See Exhibit 99.1

Remarks

This Form 4 is one of two Forms 4 filed relating to the same event. The Form 4 has been split into two filings because there are more than 10 reporting persons in total, and the SEC's EDGAR filing system limits a single Form 4 to a maximum of 10 reporting person. Each Form 4 is filed by Designated Filer, Insight Holdings Group, LLC. Exhibit List: Exhibit 99.1 - Explanation of Responses Exhibit 99.2 - Joint Filers' Names and Addresses Exhibit 99.3 - Joint Filers' Signatures