C3.ai Inc. (NYSE: AI) announced that Thomas M. Siebel resumed his role as chief executive officer on May 8, 2026, while Stephen Ehikian continues as president of the enterprise AI software company.

The company reported preliminary fourth quarter revenue of $51.6 million, falling within its guidance range of $48.0 to $52.0 million. C3 AI posted a GAAP loss from operations of $121.2 million for the quarter, while its non-GAAP loss from operations of $54.4 million came in better than the guidance range of $56.0 to $64.0 million.

For the full fiscal year ended April 30, 2026, C3 AI reported revenue of $250.3 million, within guidance of $246.7 to $250.7 million. The company's GAAP loss from operations was $498.5 million, while the non-GAAP loss from operations of $217.8 million exceeded guidance expectations of $219.5 to $227.5 million.

Siebel said his health issues from 2025 are largely resolved and his vision is improving. "I am energized to be back in the CEO role and to lead C3 AI through this next chapter," he stated.

During the fourth quarter, C3 AI signed 28 agreements, including nine new Initial Production Deployments and seven IPD conversions. The company implemented a restructuring plan designed to deliver approximately $135 million in annualized non-GAAP cost savings.

C3 AI ended the year with $575.4 million in cash, cash equivalents, and investments. The company expects non-employee expense reductions to be substantially realized starting in the second half of fiscal year 2027.

The preliminary results are unaudited estimates subject to completion of financial closing procedures. Final results will be provided on June 3, 2026.