Inogen Added to Russell 2000(R) and 3000(R) Indexes

GOLETA, Calif., March 31, 2014 (GLOBE NEWSWIRE) -- Inogen, Inc. (Nasdaq:INGN), a medical technology company offering innovative portable oxygen concentrators used to deliver supplemental long-term oxygen therapy to patients suffering from chronic respiratory conditions, announced today the company was added to the Russell 2000® and Russell 3000® Indexes following the reconstitution of Russell Investment Group's family of US indexes after market close on March 31, 2014.

The Russell 2000® Index measures the performance of the small-cap segment of the U.S. equity market and is a subset of the Russell 3000®, representing approximately 10 percent of the total market capitalization of that index. Membership in the Russell 2000® Index includes automatic inclusion in the appropriate growth and style indexes.

About the Russell Indexes

Russell indices are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. Russell Investments determines membership for each index based on objective market capitalization rankings and style attributes. Approximately $5.2 trillion in assets are currently benchmarked to the Russell family of indexes.

About Inogen

Inogen is innovation in oxygen therapy. We are a medical technology company that develops, manufactures and markets innovative portable oxygen concentrators used to deliver supplemental long-term oxygen therapy to patients suffering from chronic respiratory conditions. For more information, please visit www.inogen.com.

CONTACT: Investor Relations Contact:
         ir@inogen.net
         805-562-0500 ext 7

         Media Contact:
         Byron Myers
         805-562-0503

Released March 31, 2014