Inogen, Inc. announced that On September 1, 2023, Kristin Caltrider, Executive Vice President, Finance, Chief Financial Officer and Treasurer, notified Inogen, Inc. (the Company) of her intention to step down as an officer of the Company effective upon the date a new Executive Vice President, Chief Financial Officer and Treasurer commences employment, which will occur on September 11, 2023. Ms. Caltriders decision was not related to any disagreements with the Company or its management on any matters relating to the Companys operations, policies, or practices. Ms. Caltrider has agreed to remain in a non-executive employee role to assist with the transition of her duties through September 29, 2023.

Effective as of September 11, 2023, the Companys board of directors (the Board) appointed Michael K. Sergesketter to serve as the Companys interim Executive Vice President, Chief Financial Officer and Treasurer. Mr. Michael K. Sergesketter, previously served as the Companys interim Executive Vice President, Chief Financial Officer and Treasurer from December 2021 until May 2022. Mr.Sergesketter served as the Vice President and Chief Financial Officer at Kimball Electronics, Inc., an electronics manufacturing company, from October 2014 to July 2021.

Prior to the spin-off of Kimball Electronics, Mr. Sergesketter served as the Vice President and Chief Financial Officer for Kimball Electronics Group, Inc., an electronics manufacturing company, from July 1996 to October 2014. Prior to Kimball Electronics Group, Mr. Sergesketter served as Vice President of Audit and Management Services at Kimball International, Inc. from January 1991 to June 1996. Prior to that, Mr. Sergesketter held various internal audit roles at Kimball International, Inc. from June 1981 to January 1991.

Mr. Sergesketter holds a B.S. in accounting from University of Southern Indiana.