Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2	Jan 29, 2018	C	2,584	—	A	1,418,005	I	By Presidio Partners 2007, L.P.
Common Stock^F1,F2	Jan 29, 2018	C	66	—	A	36,358	I	By Presidio Partners 2007 (Parallel), L.P.
Common Stock^F1,F2	Jan 29, 2018	C	849,794	—	A	2,267,799	I	By Presidio Partners 2007, L.P.
Common Stock^F1,F3	Jan 29, 2018	C	21,789	—	A	58,147	I	By Presidio Partners 2007 (Parallel), L.P.
Common Stock^F1,F3	Jan 29, 2018	C	127,269	—	A	2,395,068	I	By Presidio Partners 2007, L.P.
Common Stock^F1,F3	Jan 29, 2018	C	3,263	—	A	61,410	I	By Presidio Partners 2007 (Parallel), L.P.

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	D/I
Series A Preferred Stock^F1	—	Jan 29, 2018	C	6,971	D	—	—	Common Stock	2,584	I
Series A Preferred Stock^F1	—	Jan 29, 2018	C	179	D	—	—	Common Stock	66	I
Series B Preferred Stock^F3,F1	—	Jan 29, 2018	C	2,292,320	D	—	—	Common Stock	849,794	I
Series B Preferred Stock^F3,F1	—	Jan 29, 2018	C	58,777	D	—	—	Common Stock	21,789	I
Series C Preferred Stock^F3,F1	—	Jan 29, 2018	C	343,310	D	—	—	Common Stock	127,269	I
Series C Preferred Stock^F3,F1	—	Jan 29, 2018	C	21,789	D	—	—	Common Stock	3,263	I

Explanation of responses

F1Effective immediately prior to the closing of the Issuer's initial public offering of its common stock, each share of the Series A Preferred Stock, Series B Preferred Stock and Series C Preferred Stock automatically converted into 0.3707 shares of the Issuer's common stock.
F2Securities directly held by Presidio Partners 2007, L.P. ("Presidio Partners"). Presidio Partners 2007 GP, L.P. ("Presidio GP") is the sole general partner of Presidio Partners. David Collier, M.D., James Watson and Faysal Sohail are the general partners of Presidio GP, and may be deemed to have voting control and investment power over the securities held by Presidio Partners, but disclaim beneficial ownership of the securities held by Presidio Partners, except to the extent of their pecuniary interest therein.
F3Securities directly held by Presidio Partners 2007 (Parallel), L.P. ("Presidio Parallel"). Presidio GP is the sole general partner of Presidio Parallel. David Collier, M.D., James Watson and Faysal Sohail are the general partners of Presidio Parallel, and may be deemed to have voting control and investment power over the securities held by Presidio Parallel, but disclaim beneficial ownership of the securities held by Presidio Parallel, except to the extent of their pecuniary interest therein.