X0609 4 2026-05-20 0001418819 Iridium Communications Inc. IRDM 0001376179 Canfield Thomas C false C/O IRIDIUM COMMUNICATIONS INC. 1676 INTERNATIONAL DRIVE, SUITE 1100 MCLEAN VA 22102 1 0 0 0 0 Common Stock 2026-05-20 4 D 0 135.7 0 D 233655.1 D Common Stock 36682 I By Thomas C. Canfield 2017 GRAT Reflects the forfeiture of certain restricted stock units that were granted to the reporting person on January 6, 2026 pursuant to the issuer's director compensation plan in lieu of annual cash committee member fees for service as a member of the issuer's Nominating and Corporate Governance Committee (the "Committee"), which forfeiture resulted from the reporting person's cessation of service on the Committee. Each restricted stock unit represented a contingent right to receive one share of common stock of the issuer. These shares are owned by a grantor retained annuity trust ("GRAT"). The reporting person is the trustee and sole annuitant of the GRAT. /s/ Peter L. Trentman, Attorney-in-Fact 2026-05-26