X0306 4 2019-08-16 0001310114 SERVICESOURCE INTERNATIONAL, INC. SREV 0001493191 MOORE GARY B C/O SERVICESOURCE INTERNATIONAL, INC. 707 17TH STREET, 25TH FLOOR DENVER CO 80202 1 1 0 0 CEO Common Stock 2019-08-16 4 P 0 21610 .82 A 818241 D Common Stock 2019-08-19 4 P 0 95390 .87 A 913631 D The price reported in Column 4 is the weighted average price which has been rounded to the nearest cent. The shares were purchased in multiple transactions at prices ranging from $0.7963 to $0.835, inclusive. The Reporting Person undertakes to provide to 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. The price reported in Column 4 is the weighted average price which has been rounded to the nearest cent. The shares were purchased in multiple transactions at prices ranging from $0.85 to $0.875, inclusive. The Reporting Person undertakes to provide to 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. /s/ Patricia A. Elias, by power of attorney 2019-08-19