144 0001178032 XXXXXXXX LIVE 0001418819 Iridium Communications Inc. 001-33963 1750 TYSONS BOULEVARD Suite 1400 MCLEAN VA 22102 301-571-6200 Matthew J. Desch Affiliate Common J.P. Morgan Securities LLC

390 Madison Avenue 6th Floor New York NY 10017

25000 1600000 125924403 06/07/2023 Nasdaq Common 11/10/2022 Transfer Matt Desch who acquired the shares via Compensation on 09/29/09 N 15327 11/10/2022 NA Common 08/31/2021 Transfer Matt Desch who acquired the shares via Compensation on 03/01/16 N 9000 08/31/2021 NA Common 11/10/2022 Transfer Matt Desch who acquired the shares via Compensation on 08/06/16 N 673 11/10/2022 NA Y The shares filed today will be sold by The Matt and Ann Desch Foundation, Matthew J. Desch as Director 06/07/2023 02/24/2023 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for The Matt and Ann Desch Foundation