Inogen Inc — Director's Dealing 2015

May 21, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Inogen Inc (INGN)
CIK: 0001294133
Period of Report: 2015-05-18

Reporting Person: Petersen Timothy (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-18	Common Stock	S	8140	$37.3465	Disposed	104072	Indirect
2015-05-18	Common Stock	S	5427	$37.3465	Disposed	69376	Indirect
2015-05-18	Common Stock	S	36808	$37.3465	Disposed	474654	Indirect
2015-05-18	Common Stock	S	8612	$37.3465	Disposed	111494	Indirect
2015-05-19	Common Stock	S	7826	$37.1416	Disposed	96246	Indirect
2015-05-19	Common Stock	S	5218	$37.1416	Disposed	64158	Indirect
2015-05-19	Common Stock	S	35389	$37.1416	Disposed	439265	Indirect
2015-05-19	Common Stock	S	8280	$37.1416	Disposed	103214	Indirect

Footnotes

F1: Price reflected is the weighted-average sale price for shares sold. The range of the sale prices for the transaction was $37.000 and $38.47 per share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer, or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F2: These shares are held by Arboretum Ventures 1, LLC ("Ventures 1"). Arboretum Investment Manager, LLC ("AIM") serves as the managing member of Ventures 1. Arboretum Ventures, Inc. ("INC") serves as the Manager of AIM. Timothy Petersen is a shareholder of INC and may be deemed to have voting and investment power with respect to such shares. The reporting person disclaims beneficial ownership of the shares reported herein, except to the extent of his pecuniary interest therein.

F3: These shares are held by Arboretum Ventures 1-A, LLC ("Ventures 1-A"). AIM serves as the managing member of Ventures 1-A. INC serves as the Manager of AIM. Timothy Petersen is a shareholder of INC and may be deemed to have voting and investment power with respect to such shares. The reporting person disclaims beneficial ownership of the shares reported herein, except to the extent of his pecuniary interest therein.

F4: These shares are held by Arboretum Ventures II, L.P ("Ventures II"). Arboretum Investment Manager II, LLC ("AIM II") serves as the general partner of Ventures II. Timothy Petersen is a managing member of AIM II and may be deemed to have voting and investment power with respect to such shares. The reporting person disclaims beneficial ownership of the shares reported herein, except to the extent of his pecuniary interest therein.

F5: These shares are held by Arboretum Ventures IIa, L.P ("Ventures IIa). AIM II serves as the sole manager of Arboretum Investment Manager IIa, LLC ("AIM IIa"), which serves as the general partner of Ventures IIa. Timothy Petersen is a managing member of AIM II and may be deemed to have voting and investment power with respect to such shares. The reporting person disclaims beneficial ownership of the shares reported herein, except to the extent of his pecuniary interest therein.

F6: Price reflected is the weighted-average sale price for shares sold. The range of the sale prices for the transaction was $37.000 and $37.61 per share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer, or security holder of the Issuer, full information regarding the number of shares sold at each separate price.