Inogen (INGN) Reports Q4 Loss, Misses Revenue Estimates Posted byZacks Equity Research February 25, 2022 Leave a comment on Inogen (INGN) Reports Q4 Loss, Misses Revenue Estimates Inogen (INGN) delivered earnings and revenue surprises of -36.49% and 0.04%, respectively, for the quarter ended December 2021. Do the numbers hold clues to what lies ahead for the stock?