X0609 4 2026-08-31 0 0001517413 Fastly, Inc. FSLY 0001769490 Bergman Artur false C/O FASTLY, INC. 475 BRANNAN STREET, SUITE 300 SAN FRANCISCO CA 94107 1 1 0 0 Chief Technology Officer 0 Class A Common Stock 2026-08-31 4 S 0 6225 23 D 1913825 D Class A Common Stock 1658564 I See Footnote. Class A Common Stock 840005 I See Footnote Class A Common Stock 109686 I See Footnote Class A Common Stock 156521 I See Footnote Class A Common Stock 588671 I See Footnote Class A Common Stock 254808 I See Footnote Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units. The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary. The shares are held by The Artur Bergman Remainder Trust One DTD 5/2/2019, of which the reporting person is the investment advisor. The shares are held by The Artur Bergman Remainder Trust Three DTD 5/2/2019, of which the reporting person is the investment advisor. The shares are held by The PAB 2021 Remainder Trust, of which the reporting person is the investment advisor. The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 4, of which the reporting person is trustee. The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 5, of which the reporting person is trustee. /s/ Tara Seracka, Attorney-in-Fact 2026-09-02