Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock^F3,F4	Mar 6, 2019	C	12,356,718	—	A	12,356,718	I	See footnote
Class A Common Stock^F3,F5	Mar 6, 2019	C	285,728	—	A	285,728	I	See footnote
Class A Common Stock^F1	holding	—	—		—	8,778,306	I	See footnote
Class A Common Stock^F2	holding	—	—		—	1,261,465	I	See footnote

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Class B Common Stock^F7,F6,F8	—	Mar 6, 2019	C	19,785,638	D	—	—	Class A Common Stock	19,785,638	12,142,265	I

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 the first 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 persons. This first Form 4 should be read in conjunction with the second Form 4 filed by the Designated Filer, Insight Holdings Group, LLC on the date hereof. Exhibit List ------------ Exhibit 99.1 - Explanation of Responses Exhibit 99.2 - Joint Filers' Signatures Exhibit 99.3 - Joint Filer Information