X0508 4 2025-11-17 0 0001406666 CALIX, INC (CALX) 0001483757 Russo Carl C/O CALIX, INC. 3155 OLSEN DRIVE, SUITE 450 SAN JOSE CA 95117 1 0 1 0 0 Common Stock 2025-11-17 4 M 0 10000 12.63 A 3963070 D Common Stock 1694188 I See Footnote Common Stock 13782 I See Footnote Stock Option (right to buy) 12.63 2025-11-17 4 M 0 10000 0 D 2030-05-22 Common Stock 10000 590000 D Shares held by The Crescentico Trust, Carl Russo, Trustee. Shares held by Equanimous Investments. The managing members of Equanimous Investments are Carl Russo and Tim Pasquinelli. These individuals may be deemed to have shared voting and investment power over the shares held by Equanimous Investments. Each of these individuals disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein. 100% of the shares subject to the option were fully vested and exercisable on May 22, 2024. /s/ Tom Gemetti as Attorney-in-Fact for Carl Russo 2025-11-18