X0306 4 2020-08-11 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 2020-08-11 4 S 0 28620 29.76 D 290258 D The price reported in Column 4 is a weighted average price. These shares were sold in several transactions at prices ranging from $29.75 to $29.85, 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 sold at each separate price within the range set forth in this footnote to this Form 4. /s/Brian Leaf, Attorney-in-Fact 2020-08-13