Elon Musk’s AI company, xAI, now has a new chief financial officer: Former Morgan Stanley banker Anthony Armstrong, the Financial Times reported, citing anonymous sources.

Armstrong, who previously advised Musk during the Twitter deal, will oversee the finances of both xAI and X, which were merged in April, the report said. The former banker has been working with xAI for several weeks and was only recently appointed as CFO, the FT added.

xAI has been without a CFO since its previous finance head, Mike Liberatore, left the company in July, and Armstrong’s appointment follows a slate of high-profile executive departures at both xAI and X.

xAI’s general counsel, Robert Keele, left the company in August after a little more than a year on the job. Raghu Rao, a senior lawyer, also departed around the same time, and Igor Babuschkin, one of xAI’s co-founders, in August said he was leaving the company to launch his own VC firm dedicated to AI safety research. Linda Yaccarino, former CEO of X, also resigned in July.

Armstrong will take over from X’s current CFO, Mahmoud Reza Banki, who is leaving the company, the FT reported.

xAI did not immediately return a request for comment.