X0407 4 2023-05-22 0001724979 Rain Oncology Inc. RAIN 0001465837 Boxer Capital, LLC 12860 EL CAMINO REAL SUITE 300 SAN DIEGO CA 92130 true See remarks. 0001465836 Boxer Asset Management Inc. 12860 EL CAMINO REAL SUITE 300 SAN DIEGO CA 92130 true See remarks 0001015747 LEWIS JOSEPH C/O CAY HOUSE EP TAYLOR DRIVE N7776, LYFORD CAY NEW PROVIDENCE BAHAMAS true See remarks. 0001465914 Davis Aaron I. 12860 EL CAMINO REAL, SUITE 300 SAN DIEGO CA 92130 true false Common Stock 2023-05-22 4 S 0 995000 1.25 D 1152212 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.18 to $1.30, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. These securities are owned directly by Boxer Capital, LLC ("Boxer Capital"), which may be deemed to be a member of a "group" for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, consisting of (i) Boxer Capital, (ii) Boxer Asset Management Inc. ("Boxer Management"), (iii) Aaron I. Davis, (iv) MVA Investors, LLC, and (v) Joe Lewis (collectively, the "Boxer Group"). Each member of the Boxer Group other than Boxer Capital disclaims beneficial ownership of these securities to the extent it or he does not have a pecuniary interest therein These securities are owned indirectly by Boxer Management and Joe Lewis, by virtue of their ownership of Boxer Capital. Aaron Davis, the CEO of Boxer Capital, LLC, is a director of Rain Oncology Inc. /s/ Aaron I. Davis, Chief Executive Officer, Boxer Capital, LLC 2023-05-24 /s/ Paul Higgs, Director, Boxer Asset Management Inc. 2023-05-24 /s/ Joseph C. Lewis 2023-05-24 /s/ Aaron I. Davis 2023-05-24