X Corp (formerly Twitter): X belongs to SpaceX through SpaceXAI, the former xAI. Musk bought Twitter in 2022, xAI absorbed X in March 2025, SpaceX acquired xAI in February 2026, and SpaceX listed on Nasdaq in June 2026. X's 2025 ad revenue was about $1.8B.
From Twitter to X
Twitter started at Odeo in 2006 as a way to share short status updates. It listed on the NYSE in 2013 and reported $5.08B in revenue for 2021, its last full year as a public company. Elon Musk closed a roughly $44B buyout in October 2022, cut staff deeply, and renamed the service X in 2023.
Ownership Today
In March 2025, xAI acquired X in an all-stock deal that valued X at $33B net of debt. In February 2026, SpaceX acquired xAI, which took the SpaceXAI name in July. SpaceX began trading on Nasdaq as SPCX on June 12, 2026. Linda Yaccarino, CEO from June 2023, resigned in July 2025, and no separate CEO has been named since.
What SpaceX's Filing Shows
SpaceX's S-1 reports X with Grok in an AI segment. That segment had $3.2B of revenue and a $6.4B operating loss in 2025. X and Grok had 550 million combined monthly users in March 2026. Press analysis of the filing put X's 2025 ad revenue at about $1.8B, up around 7% on 2024 but roughly 59% below 2021.
How X Makes Money
Advertising is still X's largest revenue source. Subscriptions are growing: X and Grok subscription revenue rose by $365M in 2025, and data licensing by $88M. X Money, which has Visa as a partner, is the newest line.
Outlook
The key questions are whether advertisers keep coming back, whether subscriptions and payments keep growing, and how X supports SpaceX's costly push into Grok. EU regulatory action and competition from Threads, Bluesky and TikTok are the main pressures.