13D Filing: OrbiMed Advisors and Arsanis Inc (ASNS)

Exhibit

Description

1.

Joint Filing Agreement among OrbiMed Advisors LLC, OrbiMed Capital GP IV LLC and Samuel D. Isaly.

2.

Form of Lock-Up Agreement (incorporated by reference to Exhibit C of Exhibit 1.1 to Amendment No. 1 to the Issuer’s Registration Statement on Form S-1/A (SEC 333-221050), filed with the SEC on November 6, 2017).

3.

Second Amended and Restated Investors’ Rights Agreement by and among the Issuer and each of the persons listed on Schedule A thereto, dated April 12, 2016 and amended on November 3, 2017 (incorporated by reference to Exhibit 10.1 to Amendment No. 1 to the Issuer’s Form S-1/A (SEC File No. 333-221050), filed with the SEC on November 6, 2017).