X0306 4 2016-09-09 0 0001418819 Iridium Communications Inc. IRDM 0001178032 DESCH MATTHEW J C/O IRIDIUM COMMUNICATIONS INC. 1750 TYSONS BOULEVARD, SUITE 1400 MCLEAN VA 22102 1 1 0 0 Chief Executive Officer Common Stock 2016-09-09 4 P 0 15000 6.98 A 554040 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.94 to $6.99, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in footnote (1) to this form Form 4. /s/Brian Leaf, Attorney-in-Fact 2016-09-12