
Brad Lightcap, OpenAI's former COO and Altman confidante, leaves. He built the go-to-market team from 50 to 700; the company is trying to justify its $852 billion valuation and gear up for an IPO.
Brad Lightcap, a senior OpenAI executive and close adviser to CEO Sam Altman, said Tuesday he is leaving the artificial intelligence company to "start something new." His departure adds to a string of leadership exits as OpenAI works to justify its $852 billion valuation and prepare for an expected initial public offering.
Lightcap joined OpenAI in 2018 and served as chief operating officer for four years before shifting to a special-projects role in April. At that time, chief revenue officer Denise Dresser took over most of his duties. In a post on X, Lightcap wrote that he feels "incredibly fortunate" to have spent nearly a decade at the company. "Mission success feels within sight," he said. "It has been the honor of my life to help bring us to this point."
His departure follows several other high-profile exits. Fidji Simo, OpenAI's product and business chief, stepped down last month to focus on her health after a severe exacerbation of a chronic illness. Three more executives left in April: Bill Peebles, who led the defunct short-form video app Sora; Kevin Weil, vice president of OpenAI for Science; and Srinivas Narayanan, tech chief of B2B Applications.
Lightcap has been one of Altman's most trusted deputies since the two worked together at Y Combinator, the startup incubator Altman ran before founding OpenAI. Over an 18-month stretch through mid-2025, Lightcap built OpenAI's go-to-market team from roughly 50 people to more than 700, including sales representatives and staff focused on customer success, developer relations and strategic partnerships. That push accelerated after the launch of GPT-4 and ChatGPT Enterprise in 2023, as OpenAI tried to take its consumer success into the enterprise and compete with Anthropic. Clients started coming from every direction, Lightcap told CNBC about a year ago.
"Among the most rewarding parts of this journey for me has been watching each of these teams mature under brilliant leaders," Lightcap wrote on Tuesday. "I am excited for the next decade in the hands of this incredibly capable team."
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