X0306 4 2014-02-20 0 0001294133 Inogen Inc INGM 0001433352 ARBORETUM VENTURES II LP 303 DETROIT STREET, SUITE 301 ANN ARBOR MI 48104 0 0 1 0 0001592724 Arboretum Ventures 1, LLC 303 DETROIT STREET, SUITE 301 ANN ARBOR MI 48104 0 0 1 0 0001592721 Arboretum Investment Manager, LLC 303 DETROIT STREET, SUITE 301 ANN ARBOR MI 48104 0 0 1 0 0001592723 Arboretum Investment Manager IIa, LLC 303 DETROIT STREET, SUITE 301 ANN ARBOR MI 48104 0 0 1 0 0001592760 Arboretum Ventures 1-A, LLC 303 DETROIT STREET, SUITE 301 ANN ARBOR MI 48104 0 0 1 0 0001433353 ARBORETUM VENTURES 11A LP 303 DETROIT STREET, SUITE 301 ANN ARBOR MI 48104 0 0 1 0 0001592722 Arboretum Investment Manager II, LLC 303 DETROIT STREET, SUITE 301 ANN ARBOR MI 48104 0 0 1 0 0001592732 Garfinkle Jan L. 303 DETROIT STREET, SUITE 301 ANN ARBOR MI 48104 0 0 1 0 Common Stock 2014-02-20 4 C 0 112640 A 123072 I See Footnote Common Stock 2014-02-20 4 C 0 144174 A 267246 I See Footnote Common Stock 2014-02-20 4 C 0 33612 A 300858 I See Footnote Common Stock 2014-02-20 4 C 0 75091 A 82045 I See Footnote Common Stock 2014-02-20 4 C 0 96114 A 178159 I See Footnote Common Stock 2014-02-20 4 C 0 22408 A 200567 I See Footnote Common Stock 2014-02-20 4 C 0 43456 A 43456 I See Footnote Common Stock 2014-02-20 4 C 0 975846 A 1019302 I See Footnote Common Stock 2014-02-20 4 C 0 345168 A 1364470 I See Footnote Common Stock 2014-02-20 4 C 0 10181 A 10181 I See Footnote Common Stock 2014-02-20 4 C 0 228636 A 238817 I See Footnote Common Stock 2014-02-20 4 C 0 80871 A 319688 I See Footnote Series D Preferred Stock 2014-02-20 4 C 0 59931 0 D Common Stock 112640 0 I See Footnote Series E Preferred Stock 2014-02-20 4 C 0 53548 0 D Common Stock 144174 0 I See Footnote Series F Preferred Stock 2014-02-20 4 C 0 33612 0 D Common Stock 33612 0 I See Footnote Series D Preferred Stock 2014-02-20 4 C 0 39953 0 D Common Stock 75091 0 I See Footnote Series E Preferred Stock 2014-02-20 4 C 0 35698 0 D Common Stock 96114 0 I See Footnote Series F Preferred Stock 2014-02-20 4 C 0 22408 0 D Common Stock 22408 0 I See Footnote Series D Preferred Stock 2014-02-20 4 C 0 23121 0 D Common Stock 43456 0 I See Footnote Series F Preferred Stock 2014-02-20 4 C 0 975846 0 D Common Stock 975846 0 I See Footnote Series G Preferred Stock 2014-02-20 4 C 0 345168 0 D Common Stock 345168 0 I See Footnote Series D Preferred Stock 2014-02-20 4 C 0 5417 0 D Common Stock 10181 0 I See Footnote Series F Preferred Stock 2014-02-20 4 C 0 228636 0 D Common Stock 228636 0 I See Footnote Series G Preferred Stock 2014-02-20 4 C 0 80871 0 D Common Stock 80871 0 I See Footnote Each share of (i) Series D Preferred Stock automatically converted into 1.879505664 shares of Common Stock, (ii) Series E Preferred Stock automatically converted into 2.692436975 shares of Common Stock, (iii) Series F Preferred Stock automatically converted into 1 share of Common Stock, and (iv) Series G Preferred Stock automatically converted into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. The shares have no expiration date. 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. Jan Garfinkle and Timothy Petersen are the sole shareholders of INC and share the power to vote or dispose of these shares and therefore may be deemed to have voting and investment power with respect to such shares; however, they disclaim beneficial ownership of the shares except to the extent of their pecuniary interests therein. Timothy Petersen is a director of the Issuer and, accordingly, files separate Section 16 reports. 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. Jan Garfinkle and Timothy Petersen are the sole shareholders of INC and share the power to vote or dispose of these shares and therefore may be deemed to have voting and investment power with respect to such shares; however, they disclaim beneficial ownership of the shares except to the extent of their pecuniary interests therein. Timothy Petersen is a director of the Issuer and, accordingly, files separate Section 16 reports. 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. Jan Garfinkle and Timothy Petersen are the managing members of AIM II and share the power to vote or dispose of these shares and therefore may be deemed to have voting and investment power with respect to such shares; however, they disclaim beneficial ownership of the shares except to the extent of their pecuniary interests therein. Timothy Petersen is a director of the Issuer and, accordingly, files separate Section 16 reports. 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. Jan Garfinkle and Timothy Petersen are the managing members of AIM II and share the power to vote or dispose of these shares and therefore may be deemed to have voting and investment power with respect to such shares; however, they disclaim beneficial ownership of the shares except to the extent of their pecuniary interests therein. Timothy Petersen is a director of the Issuer and, accordingly, files separate Section 16 reports. ARBORETUM VENTURES 1, LLC By: Arboretum Investment Manager, LLC Its: Manager By: Arboretum Ventures, Inc. Its: Manager By: Jan L. Garfinkle, President 2014-02-21 ARBORETUM VENTURES II, L.P. By: Arboretum Investment Manager II, LLC Its: General Partner By: Jan L. Garfinkle, Managing Director 2014-02-21 ARBORETUM INVESTMENT MANAGER, LLC By: Arboretum Ventures, Inc. Its: Manager By: Jan L. Garfinkle, President 2014-02-21 ARBORETUM INVESTMENT MANAGER IIA, LLC By: Arboretum Investment Manager II, LLC Its: Manager By: Jan L. Garfinkle, Managing Director 2014-02-21 ARBORETUM VENTURE 1-A, LLC By: Arboretum Investment Manager, LLC Its: Manager By: Arboretum Ventures, Inc. Its: Manager By: Jan L. Garfinkle, President 2014-02-21 ARBORETUM VENTURES IIA, L.P. By: Arboretum Investment Manager IIa, LLC Its: General Partner By: Arboretum Investment Manager II, LLC Its: Manager By: Jan L. Garfinkle, Managing Director 2014-02-21 ARBORETUM INVESTMENT MANAGER II, LLC By: Jan L. Garfinkle, Managing Director 2014-02-21 ARBORETUM VENTURES, INC. By: Jan L. Garfinkle, President JAN L. GARFINKLE 2014-02-21 JAN L. GARFINKLE By: Jan L. Garfinkle, President 2014-02-21