X0306 4 2022-03-03 0 0001418819 Iridium Communications Inc. IRDM 0001229996 FITZPATRICK THOMAS C/O IRIDIUM COMMUNICATIONS INC. 1750 TYSONS BOULEVARD, SUITE 1400 MCLEAN VA 22102 1 1 0 0 Chief Financial Officer Common Stock 2022-03-03 4 A 0 6136 0.00 A 155454 D Common Stock 2022-03-03 4 F 0 2767 39.21 D 152687 D Represents the vested portion of a performance-based restricted stock unit award based on the issuer's satisfaction of certain performance criteria. In light of the performance-based vesting conditions of the award, such award was not reportable under Section 16 until vesting was determined, which occurred on March 3, 2022. The transaction reported represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations in connection with the vesting and settlement of the restricted stock unit award reported in footnote (1) herein. /s/Brian Leaf, Attorney-in-Fact 2022-03-07