Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2	Apr 14, 2015	C	831,531	—	A	831,531	I	See Footnote
Common Stock^F1,F2	Apr 14, 2015	C	2,145,351	—	A	2,976,882	I	See Footnote
Common Stock^F3,F2	Apr 14, 2015	C	466,357	—	A	3,443,239	I	See Footnote
Common Stock^F4,F2	Apr 14, 2015	C	365,957	—	A	3,809,196	I	See Footnote
Common Stock^F2	Apr 14, 2015	P	810,000	$5.00	A	4,619,196	I	See Footnote

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	D/I
Series A Convertible Preferred Stock^F1,F2	—	Apr 14, 2015	C	831,531	D	—	—	Common Stock	831,531	I
Series B Convertible Preferred Stock^F1,F2	—	Apr 14, 2015	C	2,145,351	D	—	—	Common Stock	2,145,351	I
Convertible Promissory Note^F3,F2	—	Apr 14, 2015	C	466,357	D	—	—	Common Stock	466,357	I
Convertible Promissory Note^F4,F2	—	Apr 14, 2015	C	365,957	D	—	—	Common Stock	365,957	I

Explanation of responses

F1Upon the closing of the Issuer's initial public offering, each share of Series A Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into Common Stock on a one for one basis without payment or further consideration, and has no expiration date.
F2The shares are held by InterWest Partners IX, L.P. ("IW9"). InterWest Management Partners IX, LLC ("IMP9"), the general partner of IW9, has sole voting and investment control over the shares held by IW9. Philip T. Gianos, W. Stephen Holmes, Gilbert H. Kliman and Arnold Oronsky are the managing directors of IMP9. Bruce A. Cleveland, Nina Kjellson, Khaled A. Nasr and Douglas A. Pepper are the venture members of IMP9. Each of the managing directors and venture members share voting and investment control with respect to the share held by IW9 and disclaims beneficial ownership of the shares reported herein, except to the extent of his respective pecuniary interest therein.
F3The Convertible Promissory Note is convertible into the number of shares of the Issuer's Common Stock equal to the quotient obtained by dividing the entire principal amount and 184 days of accrued interest on the Convertible Promissory Note by 80% of the initial public offering price of $5.00 per share of the Issuer's Common Stock, automatically upon the closing of the Issuer's initial public offering, and has no expiration date.
F4The Convertible Promissory Note is convertible into the number of shares of the Issuer's Common Stock equal to the quotient obtained by dividing the entire principal amount and 41 days of accrued interest on the Convertible Promissory Note by 80% of the initial public offering price of $5.00 per share of the Issuer's Common Stock, automatically upon the closing of the Issuer's initial public offering, and has no expiration date.

Remarks

Exhibit List Exhibit 99 - Form 4 Joint Filer Information