X0508 4 2023-10-31 0001305253 Eiger BioPharmaceuticals, Inc. EIGR 0000884413 KAYNE RICHARD A 1900 AVENUE OF THE STARS, #1000 LOS ANGELES CA 90067 true false Common Stock 2023-10-31 4 P 0 11987 0.2625 A 5108973 I See footnote. Common Stock 2023-10-31 4 P 0 12345 0.2615 A 5121318 I See footnote. Common Stock 2023-10-31 4 P 0 130509 0.2414 A 5251827 I See footnote. Common Stock 2023-11-01 4 P 0 100000 0.2797 A 5351827 I See footnote. Common Stock 2023-11-02 4 P 0 23398 0.2977 A 5375225 I See footnote. Mr. Kayne shares control of Propel Bio Partners LLC, a Delaware limited liability company ("Propel General Partner"). Mr. Kayne and Propel General Partner act as the general partner of, or otherwise provide discretionary advisory services to, one or more private investment funds, and such investment funds acquired the referenced shares of Common Stock. Mr. Kayne is the trustee and beneficiary of the Richard Kayne and Suzanne Kayne Living Trust dtd 01/14/1999, a California trust (the "Family Trust"), and the Family Trust acquired the referenced shares of Common Stock. Mr. Kayne expressly disclaims beneficial ownership of the shares of Common Stock reported herein except to the extent of any pecuniary interest. /s/ Richard A. Kayne 2023-11-02