Inogen acknowledged data from its previous research firm were inaccurate on its latest investor call. A short seller recently called out Inogen for what it claimed was an overstatement of its market potential and economic projections, and has asked the company to clarify its estimates.

The short seller that took on St. Jude Medical two years ago on cardiac-device cybersecurity now is targeting Inogen, maker of portable oxygen concentrators. Muddy Waters says the research firm that projected Inogen’s market penetration is way off and the company’s leadership is far too optimistic.

Oxygen device manufacturer Inogen is recovering from a data breach. The company disclosed in a financial filing that hackers accessed private data from approximately 30,000 customers.

Recent executive-level company changes and promotions in the biopharma, medical device and diagnostics industries.