X0306 4 2020-09-02 0 0001517413 Fastly, Inc. FSLY 0001354177 DHALIWAL SUNIL 800 MENLO AVENUE SUITE 220 MENLO PARK CA 94025 1 0 0 0 Class A Common Stock 2020-09-02 4 S 0 100307 90.80 D 386572 D Class A Common Stock 2020-09-03 4 S 0 6946 85.04 D 379626 D Class A Common Stock 2020-09-03 4 S 0 33054 83.06 D 346572 D Class A Common Stock 2020-09-04 4 S 0 30000 80.14 D 316572 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $85.00 to $85.12. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.00 to $83.36. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $80.00 to $80.39. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges. /s/ Seth Gottlieb, Attorney-in-Fact 2020-09-04