Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F3	Aug 20, 2018	J	2,025,000	$0.00	D	2,029,251	I	By Institutional Venture Partners XIII, L.P.
Common Stock^F5	Aug 20, 2018	J	30,375	$0.00	A	30,375	I	By Institutional Venture Management XIII, LLC
Common Stock^F5	Aug 20, 2018	J	30,375	$0.00	D	0	I	By Institutional Venture Management XIII, LLC
Common Stock	Aug 20, 2018	J	5,729	$0.00	A	5,729	I	By Todd C. Chaffee
Common Stock^F7	Aug 20, 2018	J	4,584	$0.00	A	4,584	I	By Norman A. & Jill M. Fogelsong A Trust U/T/A Dated 3/22/84
Common Stock^F8	Aug 20, 2018	J	1,145	$0.00	A	1,145	I	By Fogelsong Children's Trust U/T/D 8/1/85
Common Stock^F9	Aug 20, 2018	J	5,729	$0.00	A	5,729	I	By The Harrick Min Family Trust U/D/T 11/30/05
Common Stock^F10	Aug 20, 2018	J	5,729	$0.00	A	5,729	I	By Dennis B. Phelps, Jr. Trust
Common Stock^F11	Aug 20, 2018	J	5,729	$0.00	A	5,729	I	By Miller Venture Partners
Common Stock	Aug 20, 2018	J	804	$0.00	A	804	I	By Jules A. Maltz
Common Stock^F1	holding	—	—		—	4,054,250	I	By Institutional Venture Partners XIV, L.P.

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1These shares are owned directly by Institutional Venture Partners XIV, L.P. ("IVP XIV"), of which Institutional Venture Management XIV, LLC ("IVM XIV") is the sole general partner and exercises voting and investment power over these shares. The managing directors of IVM XIV are Todd C. Chaffee, Norman A. Fogelsong, Stephen J. Harrick, Dennis B. Phelps, Jr., J. Sanford Miller and Jules A. Maltz. The reporting persons disclaim beneficial ownership of these securities, except to the extent of their respective proportionate pecuniary interest therein and this report shall not be deemed an admission that any reporting person is the beneficial owner of such securities for Section 16 or any other purpose.
F10The shares are held by the Dennis B. Phelps, Jr. Trust ("Phelps Trust"). Dennis B. Phelps, Jr. is the trustee of the Phelps Trust and disclaims beneficial ownership of these securities, except to the extent of his proportionate pecuniary interest therein.
F11The shares are held by Miller Venture Partners ("Miller Partners"). J. Sanford Miller is the general partner of Miller Partners and disclaims beneficial ownership of these securities, except to the extent of his proportionate pecuniary interest therein.
F2Represents a pro rata in kind distribution without consideration by Institutional Venture Partners XIII, L.P. ("IVP XIII") to their respective partners, including its general partner, Institutional Venture Management XIII, LLC ("IVM XIII").
F3These shares are owned directly by IVP XIII, of which IVM XIII is the sole general partner and exercises voting and investment power over these shares. The managing directors of IVM XIII are Todd C. Chaffee, Norman A. Fogelsong, Stephen J. Harrick, Dennis B. Phelps, Jr. and J. Sanford Miller. The reporting persons disclaim beneficial ownership of these securities, except to the extent of their respective proportionate pecuniary interest therein and this report shall not be deemed an admission that any reporting person is the beneficial owner of such securities for Section 16 or any other purpose.
F4Represents the receipt of shares in the pro rata in kind distribution of Common Stock of the Issuer by IVP XIII described in footnote (2).
F5The managing directors of IVM XIII are Todd C. Chaffee, Norman A. Fogelsong, Stephen J. Harrick, Dennis B. Phelps, Jr. and J. Sanford Miller. The reporting persons disclaim beneficial ownership of these securities, except to the extent of their respective proportionate pecuniary interest therein and this report shall not be deemed an admission that any reporting person is the beneficial owner of such securities for Section 16 or any other purpose.
F6Represents a pro rata in kind distribution of Common Stock of the Issuer by IVM XIII without consideration to its members.
F7The shares are held by the Norman A. & Jill M. Fogelsong A Trust U/T/A Dated 3/22/84 ("Fogelsong A Trust"). Norman A. Fogelsong is a trustee of the Fogelsong A Trust and disclaims beneficial ownership of these securities, except to the extent of his proportionate pecuniary interest therein.
F8The shares are held by the Fogelsong Children's Trust U/T/D 8/1/85 ("Fogelsong Children's Trust"). Norman A. Fogelsong is a trustee of the Fogelsong Children's Trust and disclaims beneficial ownership of these securities, except to the extent of his proportionate pecuniary interest therein.
F9The shares are held by The Harrick Min Family Trust U/D/T 11/30/05 ("Harrick Min Trust"). Stephen J. Harrick is a trustee of the Harrick Min Trust and disclaims beneficial ownership of these securities, except to the extent of his proportionate pecuniary interest therein.