Shares of the enterprise artificial intelligence company C3 AI fell 14% in extended trading on Wednesday after it announced fiscal first-quarter results and the appointment of Stephen Ehikian as its new CEO.

C3 AI reported $70.3 million in revenue for the quarter, down from $87.2 million during the same period last year. The company’s GAAP net loss widened to an 86-cent loss from a 50-cent loss a year ago.

Ehikian is a long-time tech executive who built two companies that were both acquired by Salesforce, C3 AI said. C3 AI said Ehikian assumed the new role on Sept. 1.

C3 AI kicked off a search for a new chief executive in July after its former CEO, Thomas Siebel revealed that he was diagnosed with an autoimmune disease earlier this year that resulted in “significant visual impairment.”

“C3 AI is one of the most important companies in the AI landscape and enterprise software, with a platform and applications that are unmatched,” Ehikian said. “I am confident that we will be able to capture an increasing share of the immense market opportunity in Enterprise AI.”

The company has had a rocky few months since Siebel’s diagnosis.

Shares plunged in August after C3 AI announced disappointing preliminary financial results and a restructuring of its global sales and services organization.

Siebel said in an August statement that sales results during the quarter were “completely unacceptable.” He attributed the performance to the “disruptive effect” of the reorganization, as well as his ongoing health issues.