Transactions Table

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Explanation of Responses:

Id	Content
F1	Shares are held by Lightspeed Venture Partners IX, L.P ("Lightspeed IX"). Lightspeed General Partner IX, L.P. ("LGP IX"), is the general partner of Lightspeed IX. Lightspeed Ultimate General Partner IX, Ltd. ("LUGP IX") is the general partner of LGP IX. Barry Eggers, Ravi Mhatre, and Peter Nieh are the directors of LUGP IX and share voting and dispositive power with respect to the shares held by Lightspeed IX. Messrs. Eggers, Mhatre, and Nieh disclaim beneficial ownership of the shares held by Lightspeed IX except to the extent of their respective pecuniary interests therein.
F2	Shares are held by Lightspeed Venture Partners Select, L.P. ("Lightspeed Select"). Lightspeed General Partner Select, L.P. ("LGP Select") is the general partner of Lightspeed Select. Lightspeed Ultimate General Partner Select, Ltd. ("LUGP Select") is the general partner of LGP Select. Barry Eggers, Jeremy Liew, Ravi Mhatre and Peter Nieh are the directors of LUGP Select and share voting and dispositive power with respect to the shares held by Lightspeed Select. LGP Select, LUGP Select and Messrs. Eggers, Liew, Mhatre and Nieh disclaim beneficial ownership of the shares held by Lightspeed Select, except to the extent of their respective pecuniary interests therein.
F3	Shares are held by Lightspeed Venture Partners Select III, L.P. ("Lightspeed Select III"). Lightspeed Ultimate General Partner Select III, Ltd ("LUGP Select III") is the general partner of Lightspeed Select III. Barry Eggers, Jeremy Liew, Ravi Mhatre, and Peter Nieh are the directors of LUGP Select III and share voting and dispositive power with respect to the shares held by Lightspeed Select III. LUGP Select III and Messrs. Eggers, Liew, Mhatre and Nieh disclaim beneficial ownership of the shares held by Lightspeed Select III, except to the extent of their respective pecuniary interests therein.
F4	Each share of Class B Common Stock was converted into one share of Class A Common Stock immediately prior to the completion of the Issuer's initial public offering of Class A Common Stock.
F5	Each share of Series A Preferred Stock, Series B Preferred Stock, Series B-1 Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and Series E Preferred Stock was first converted into one share of Class B Common Stock followed by a subsequent conversion into Class A Common Stock prior to the completion of the Issuer's initial public offering of Class A Common Stock.