Microsoft is experiencing a new record opening on Wall Street with the arrival of the co-founder and former number one of OpenAI, Sam Altman. The company rose 1.6% in early trading and is now trading around 1% after the latest twist in the world of artificial intelligence.

Microsoft announced the hiring of Sam Altman, co-founder and former number one of OpenAI, who was dismissed last Friday. Shortly after, former Twitch boss Emmett Shear was announced as OpenAI’s interim number one.

Sam Altman and Greg Brockman, both co-founders of OpenAI, will join Microsoft to lead a new artificial intelligence research team alongside other colleagues. The CEO, Satya Nadella, wrote on X that “The mission continues” and that he is confident in the roadmap they have established for their product. Microsoft has invested several billion dollars in computing technologies needed for OpenAI and has integrated this technology into its own products like Bing search engine.

Emmett Shear told X that his decision was made “in a matter of hours” as it was an opportunity he couldn’t pass up because he believes OpenAI is one of the most important companies in existence today. He plans to launch an independent investigation within 30 days to shed light on Sam Altman’s firing and the upheaval within the start-up. This announcement comes after a tumultuous weekend when OpenAI’s board of directors fired Sam Altman following a deliberative review process which concluded that he was not always blunt in his communications impeding his ability to fulfill his responsibilities