Iridium (IRDM) to Report Q4 Earnings: What’s in the Cards? Posted byZacks Equity Research February 15, 2022 Leave a comment on Iridium (IRDM) to Report Q4 Earnings: What’s in the Cards? While Iridium’s (IRDM) Q4 results are likely to reflect the positive impact of surging service revenues, rising operating expenses and increased lead time are likely to have dented margins.