X0306 4 2017-12-15 0 0001294133 Inogen Inc INGN 0001596078 Huggenberger Raymond 326 BOLLAY DRIVE GOLETA CA 93117 1 0 0 0 Common Stock 2017-12-15 4 M 0 1000 8.37 A 7808 D Common Stock 2017-12-15 4 M 0 3400 16.62 A 11208 D Common Stock 2017-12-15 4 M 0 6200 38.54 A 17408 D Common Stock 2017-12-15 4 M 0 3400 44.19 A 20808 D Common Stock 2017-12-15 4 S 0 3100 118.6103 D 17708 D Common Stock 2017-12-15 4 S 0 3930 119.6005 D 13778 D Common Stock 2017-12-15 4 S 0 4982 120.4334 D 8796 D Common Stock 2017-12-15 4 S 0 1988 121.2809 D 6808 D Stock Option (right to buy) 8.37 2017-12-15 4 M 0 1000 0.00 D 2023-10-09 Common Stock 1000 5037 D Stock Option (right to buy) 16.62 2017-12-15 4 M 0 3400 0.00 D 2021-03-31 Common Stock 3400 43556 D Stock Option (right to buy) 38.54 2017-12-15 4 M 0 6200 0.00 D 2022-05-15 Common Stock 6200 56600 D Stock Option (right to buy) 44.19 2017-12-15 4 M 0 3400 0.00 D 2023-05-11 Common Stock 3400 86200 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 3, 2017. Represents the weighted average share price of an aggregate total of 3,100 shares sold in the price range of $117.91 to $118.87 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 3,930 shares sold in the price range of $118.985 to $119.920 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 4,982 shares sold in the price range of $119.99 to $120.88 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 1,988 shares sold in the price range of $121.02 to $121.84 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 the reporting person's continuing service, one forty-eighth (1/48th) of the shares subject to the option shall vest each month on the same day as the vesting commencement date, such that the shares subject to the option shall become fully vested and exercisable on the fourth (4th) anniversary of the vesting commencement date. The vesting commencement date for this option is October 1, 2013. Subject to the reporting person's continuing service, 1/48th of the total shares subject to the option shall vest every month after March 1, 2014. Subject to the reporting person's continuing service, twenty-five percent (25%) of the shares subject to the option shall vest and become exercisable on the one year anniversary of the vesting commencement date, and thereafter, one forty-eighth (1/48th) of the total shares subject to the option shall vest each month on the same day as the vesting commencement date. The vesting commencement date for this option is May 1, 2015. Subject to the reporting person's continuing service, twenty-five percent (25%) of the shares subject to the option shall vest and become exercisable on the one year anniversary of the vesting commencement date, and thereafter, one forty-eighth (1/48th) of the shares subject to the option shall vest each month on the same day as the vesting commencement date, such that the shares subject to the option shall become fully vested and exercisable on the fourth (4th) anniversary of the vesting commencement date. The vesting commencement date for this option is May 1, 2016. /s/ Alison Bauerlein, as Attorney-in-Fact 2017-12-19