xAI CFO Anthony Armstrong Resigns Amid Senior Exits

Anthony Armstrong, appointed xAI chief financial officer in October, has left the company amid a broader wave of senior departures. Armstrong came to xAI from Morgan Stanley and advised Elon Musk during the acquisition of X; he reported to Bret Johnsen and was responsible for finance operations covering both xAI and X.

Armstrong’s role spanned finance for a paired set of businesses: the AI venture xAI and the social media company X. The Financial Times previously described him as steering X’s finances back toward stability after advertiser losses tied to eased content moderation. Bret Johnsen serves as finance chief for the combined entity following the xAI–SpaceX merger structure cited in reporting.

Sources indicate the departure was identified by The Information and amplified by Economic Times. Armstrong’s background includes Morgan Stanley banking experience and advising on the X acquisition. Separately, SpaceX is actively preparing a large IPO process: plans surfaced for a potential $75 billion capital raise that could value the company as high as $1.75 trillion, including earmarked retail allocations and an investor event hosting 1,500 retail participants in June.

For AI and data teams inside or partnering with xAI/X, a CFO exit matters operationally and strategically. Finance leadership directly affects runway planning, hiring budgets, vendor contracts, and capital allocation for compute, data acquisition, and R&D. The timing coincides with SpaceX’s ambitious IPO planning, which ties corporate finance teams across the group; disruption in that leadership chain could influence IPO execution, retail allocation plans, and near-term capital decisions that ripple into product roadmaps and resourcing.

appointment of a successor and whether Bret Johnsen expands his remit; any changes to budget guidance or hiring freezes; formal comment from xAI/SpaceX on the exit; and updates to SpaceX’s IPO timeline and retail allocation plans.