X0306 4 2020-02-18 0 0001517413 Fastly, Inc. FSLY 0001769554 Bixby Joshua C/O FASTLY, INC. 475 BRANNAN STREET, SUITE 300 SAN FRANCISCO CA 94107 1 1 0 0 President and CEO Class A Common Stock 2020-02-18 4 A 0 174443 0.00 A 280851 D Class A Common Stock 2020-02-18 4 A 0 17023 0.00 A 297874 D Class A Common Stock 2020-02-18 4 A 0 50403 0.00 A 348277 D The shares are represented by restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock upon settlement. The RSUs will vest as to 12.5% of the total RSUs on August 15, 2020, and thereafter vest in 14 equal quarterly installments (November, February, May, and August), in each case subject to the Reporting Person's continued service with the Company through each applicable vesting date. The shares are represented by RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock upon settlement. The RSUs will vest as to 50% of the total RSUs on August 15, 2020, and thereafter as to 25% of the RSUs on November 15, 2020 and February 15, 2021, in each case subject to the Reporting Person's continued service with the Company through each applicable vesting date. /s/ Seth Gottlieb, Attorney-in-Fact 2020-02-20