Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock^F1,F2	Sep 28, 2018	C	359,267	—	A	359,267	D
Common Stock^F1,F3,F2	Sep 28, 2018	C	458,425	—	A	842,454	D
Common Stock^F2	Sep 28, 2018	P	337,724	$15.00	A	1,180,178	D

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Series B-1 Tranche A Convertible Preferred Stock^F2,F1	—	Sep 28, 2018	C	7,446,904	D	—	—	Common Stock	359,267	0	D
Series B-1 Tranche B Convertible Preferred Stock^F2,F1	—	Sep 28, 2018	C	9,502,249	D	—	—	Common Stock	458,425	0	D

Explanation of responses

F1Each share of Series B-1 Tranche A Convertible Preferred Stock and Series B-1 Tranche B Convertible Preferred Stock (collectively, the "Preferred Stock") automatically converted into Common Stock on a 20.728-for-one basis upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.
F2The reportable shares are held of record by Sofinnova Venture Partners IX, L.P. ("SVP IX"). Sofinnova Management IX, L.L.C. ("SM IX") is the general partner of SVP IX. The individual managing members of SM IX are Michael Powell, James Healy and Anand Mehra, and they may be deemed to share voting and dispositive power over the shares held by SVP IX. Such persons and entities disclaim beneficial ownership over the shares held by SVP IX except to the extent of any pecuniary interest therein.
F3This number includes an aggregate of 24,762 shares of Common Stock received upon the conversion of the Issuer's Preferred Stock as payment of the accrued dividends through September 27, 2018. No dividends will accrue after September 27, 2018.