OpenAI president Greg Brockman has taken day-to-day operational control of the company's four main business arms — ChatGPT, Codex, enterprise, and infrastructure — after seven senior executives departed since April 2026. Sam Altman remains CEO and the company's public face, but the org-chart reshuffles across the past several months have routed nearly every operating decision through Brockman. The concentration of power arrives as OpenAI prepares for an IPO and continues to lose enterprise share to Anthropic.
The list of exits is long and top-heavy. Bill Peebles, who ran Sora, is out. Kevin Weil, the former Instagram head of product who ran OpenAI's science arm as VP, is gone. Fidji Simo, brought in as head of product and briefly the AGI chief, went on health leave and never returned. Kate Rouch, chief marketing officer, left. Srinivas Narayanan, the B2B CTO, left. Brad Lightcap, the former COO and head of special projects, left. Denise Dresser, the chief revenue officer whose role matters acutely for a company approaching an IPO, is the most recent departure.
Simo's exit did the most to reshape the org. She had been running the AI-facing product organization, and her portfolio has largely flowed to Brockman. He now sits atop the consumer product surface (ChatGPT), the developer surface (Codex), the enterprise book of business, and the physical infrastructure buildout — a span of control unusual even by frontier-lab standards.
Key facts
- 01Greg Brockman now oversees all four arms of OpenAI: ChatGPT, Codex, the enterprise business, and infrastructure buildout.
- 02Seven senior executives have exited OpenAI since April 2026, including Fidji Simo, Brad Lightcap, and Sora lead Bill Peebles.
- 03Chief Revenue Officer Denise Dresser departed as OpenAI prepares for a historic IPO.
- 04Brockman cofounded OpenAI in 2015 after leaving Stripe, where he had been CTO.
- 05The consolidation comes as OpenAI cedes enterprise ground to Anthropic.
Brockman's trajectory to this point runs through the November 2023 board coup. He dropped out of MIT to join Stripe as its early CTO, left in 2015 to cofound OpenAI alongside Altman and Ilya Sutskever, and spent most of the next eight years as a big-picture cofounder rather than a day-to-day operator. When the board fired Altman in 2023, Brockman resigned within hours, telling Altman, in the reporting of The Verge's Hayden Field, "Okay, if Sam goes, I go."
“Greg Brockman was ride or die.”— Hayden Field, Senior AI reporter
That decision — made before the roughly 700 employees signed the letter demanding Altman's reinstatement, and before the brief plan to relocate the two of them to Microsoft — bought Brockman a level of trust from Altman that no other executive at OpenAI has matched since. Mira Murati, who was briefly named interim CEO during the coup, left the company in 2024. Sutskever left as well. Of the original four figures who ran OpenAI through the ChatGPT era, Altman and Brockman are the two who remain.
The Microsoft interlude — the roughly five-minute window in which Altman and Brockman were reported to be starting a new AI division at Microsoft before returning to OpenAI — has since become tech-industry folklore.
“The five minutes that they were going to start a new division of Microsoft were some of the most hilarious five minutes in tech history.”— Hayden Field, Senior AI reporter
The practical stakes of the consolidation are large. OpenAI is racing to grow revenue fast enough to justify a public offering while spending unprecedented sums on compute, and it is doing so against Anthropic, which has been steadily winning enterprise mandates that OpenAI once had locked up. Losing a chief revenue officer at this stage of an IPO track is a live problem. Concentrating consumer, enterprise, developer, and infrastructure decisions under one lieutenant is a bet that a single trusted operator can move faster than a distributed executive bench.
It is also a bet with concentration risk. Product strategy for ChatGPT, which OpenAI has positioned as a would-be replacement for Google Search and a candidate to succeed the iPhone as the dominant consumer computing surface, now runs through the same executive as the Codex developer strategy and the enterprise sales motion. Any misjudgment upstream — pricing, model routing, API positioning — hits all four surfaces at once. There is no obvious internal check apart from Altman.
The counterweight case is that OpenAI's product surface has become too sprawling to coordinate across multiple senior GMs with overlapping mandates, which is roughly the pattern that produced the exits of Simo, Weil, and Lightcap in the first place. A single operational leader reporting to Altman is at least legible. Whether Brockman is the right operator for a company that needs to defend enterprise share from Anthropic while shipping a consumer product durable enough to survive an IPO is the open question.
The signal for the AI market is that OpenAI's next 12 months will be executed by essentially two people. Investors weighing the IPO, enterprise buyers deciding between OpenAI and Anthropic, and developers picking between the ChatGPT and Codex platforms are all effectively evaluating a two-person leadership team, not a bench. That is a workable structure for a startup and a fragile one for a company preparing to trade publicly. The next senior departure — or the absence of one — will say more about OpenAI's trajectory than any product launch.
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