144 0002074428 XXXXXXXX LIVE 0001517413 FASTLY, INC. 001-38897 475 Brannan Street, Suite 300 San Francisco CA 94107 8444327859 CHARLES L COMPTON III Director Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

7059 175627.92 151800000 04/17/2026 NASDAQ Common 04/15/2026 Restricted Stock Units Issuer N 7059 04/15/2026 N/A N 10b5-1 Sales for CHARLES L COMPTON III

475 Brannan Street, Suite 300 San Francisco CA 94107

Common 04/16/2026 11042 276050.00 CHARLES L COMPTON III

475 Brannan Street, Suite 300 San Francisco CA 94107

Common 04/15/2026 11432 270824.08 10b5-1 Sales for CHARLES L COMPTON III

475 Brannan Street, Suite 300 San Francisco CA 94107

Common 03/11/2026 49350 1233750.00 10b5-1 Sales for CHARLES L COMPTON III

475 Brannan Street, Suite 300 San Francisco CA 94107

Common 03/05/2026 36694 759066.76 10b5-1 Sales for CHARLES L COMPTON III

475 Brannan Street, Suite 300 San Francisco CA 94107

Common 03/04/2026 13982 285371.22 CHARLES L COMPTON III

475 Brannan Street, Suite 300 San Francisco CA 94107

Common 03/04/2026 59224 1247257.44 CHARLES L COMPTON III

475 Brannan Street, Suite 300 San Francisco CA 94107

Common 03/03/2026 13244 268853.20 10b5-1 Sales for CHARLES L COMPTON III

475 Brannan Street, Suite 300 San Francisco CA 94107

Common 02/19/2026 14797 279404.35 CHARLES L COMPTON III

475 Brannan Street, Suite 300 San Francisco CA 94107

Common 02/18/2026 12916 226417.48 10b5-1 Sales for CHARLES L COMPTON III

475 Brannan Street, Suite 300 San Francisco CA 94107

Common 01/20/2026 4638 40861.04 04/17/2026 08/27/2025 /s/ CHARLES L COMPTON III