X0306 4 2017-12-01 0 0001294133 Inogen Inc INGN 0001596385 Lukatch Heath C/O INOGEN, INC. 326 BOLLAY DRIVE GOLETA CA 93117 1 0 0 0 Common Stock 2017-12-01 4 M 0 2500 43.21 A 2500 D Common Stock 2017-12-01 4 S 0 2000 126.1793 D 500 D Common Stock 2017-12-01 4 S 0 500 127.28 D 0 D Stock Option (right to buy) 43.21 2017-12-01 4 M 0 2500 0.00 D 2022-10-13 Common Stock 2500 12165 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 1, 2017. Represents the weighted average share price of an aggregate total of 2,000 shares sold in the price range of $125.78 to $126.72 by the reporting person. The reporting person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. Represents the weighted average share price of an aggregate total of 500 shares sold in the price range of $126.88 to $127.68 by the reporting person. The reporting person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price Subject to reporting person's continuing to be a Service Provider (as defined in the 2014 Equity Incentive Plan), 1/12th of the total shares subject to the option vested monthly, beginning with the first month anniversary after the vesting commencement date, but vested fully on the date of the 2016 Annual Meeting of the Issuer's stockholders held after the vesting commencement date. The vesting commencement date for this option was October 14, 2015. /s/Alison Bauerlein, as Attorney-in-Fact 2017-12-04