Greg Brockman

Background

Gregory Brockman was born on November 29, 1987, in Thompson, North Dakota ¹. He grew up on a hobby farm and excelled in mathematics, chemistry, and computer science at Red River High School ^{1 2}. He won a silver medal at the 2006 International Chemistry Olympiad and was a finalist in the Intel Science Talent Search ¹. He briefly attended Harvard before transferring to MIT, then dropped out of university entirely in 2010 ^{1 2}.

Brockman joined Stripe in 2010 as the company’s fourth employee ². He became Stripe’s first CTO in 2013 and helped grow the company from 5 to 205 employees during his tenure ^{1 2}.

In December 2015, Brockman left Stripe to co-found OpenAI alongside Sam Altman, Ilya Sutskever, and others ^{1 2}. At OpenAI, he led various technical projects including OpenAI Gym and OpenAI Five, a Dota 2 bot ¹. He built OpenAI’s first commercial API over a Christmas weekend in 2020 ². He currently serves as President, Chairman, and Co-Founder, leading OpenAI’s infrastructure buildout ².

During the November 2023 board crisis at OpenAI, Brockman was removed from the nonprofit board; he returned in November 2024 ². He has since been described as “the engineer’s engineer” and OpenAI’s “builder-in-chief,” orchestrating the company’s $1.4 trillion infrastructure commitment including the Stargate Project ².

Throughout his career, Brockman has been an active angel investor, deploying personal capital into AI, developer tools, and infrastructure startups ^{3 4}.

Stated Thesis

Brockman has not published a formal investment thesis, but his investment profile indicates a focus on AI, developer tools, and SMB software, primarily at pre-seed and seed stages ^{3 4}. His stated investment range is $100K to $5M, with a $1.5M sweet spot ³.

On computing and infrastructure, Brockman has stated that “compute is the currency of intelligence” ².

On AI progress, he has said: “The fundamental bet is that AGI is possible, and if we are right about that, then it will really change everything. In my mind, the real question is, do you believe in continued AI progress?” ².

On infrastructure: “There’s no bend in the scaling laws. The thing that’s hard is execution” ².

On energy and quality of life, Brockman has noted that “the cost of energy is so correlated to quality of life, throughout history, probably more than any other single input I could think of off the top of my head, that it seems like a great thing to fund efforts trying to radically change that cost” ⁵.

Inferred Thesis

Based on 39 publicly identified investments from multiple sources ^{4 5 6}, the following patterns emerge.

Sector breakdown (based on 39 verified investments): AI and machine learning companies represent the largest cluster — Hugging Face, Scale AI, Graphcore, Cerebras Systems, Rasa, Ginkgo Bioworks, Spring Discovery, Deepnote (9 of 39, 23%). Developer tools and infrastructure form the second largest cluster — Retool, Algolia, Segment, EdgeDB, Doppler, Gadget, CodeSignal, Nylas, Cosmic JS, Percy (10 of 39, 26%). Enterprise/productivity software includes Slack, Quizlet, Triplebyte, Command E, Baseten, Lumos, Uplimit, Braintrust, Leapfin, Smarking, Human Interest (11 of 39, 28%). Consumer/marketplace includes Jopwell, Lugg, LivBlends, Bright, Marble (5 of 39, 13%). Fintech/crypto includes Sendwave, Tinker Bitcoin (2 of 39, 5%). Other includes B12, Clara Labs, Apptimize (3 of 39, 8%) ^{4 5}.

Stage distribution: The majority of investments are at seed stage, consistent with his stated preference for pre-seed and seed ³. Recent investments show increasing willingness to participate in later rounds — Lambda (Series B, 2023), Braintrust (Series A, 2024), Sparrow (Series B, 2025) ^{5 6}.

Unicorn hit rate: Brockman has 7 unicorns in his portfolio, including Hugging Face, Replit, Scale AI, Slack, Ginkgo Bioworks, and others ⁶. This represents approximately 18% of his verified portfolio (7 of 39), a strong hit rate for angel investing.

Co-investor patterns: In the Graphcore Series B (2017), Brockman invested alongside Ilya Sutskever, Demis Hassabis, and Pieter Abbeel ⁷. In the Command E seed (2020), he invested alongside Brianne Kimmel and Rahul Vohra ³. In the Prefer Series A (2017), co-investors included Mike Krieger, David Marcus, and Adam D’Angelo ³.

Geographic concentration: Investments are predominantly in San Francisco Bay Area-based companies, with some exceptions (Graphcore in the UK, Sendwave with Africa focus) ⁴.

Temporal pattern: Brockman’s angel investing has been consistent from approximately 2014 through 2025, with investments continuing even as his OpenAI responsibilities have grown substantially ^{5 6}.

Notable gap: Despite Brockman’s deep involvement in language models, his public portfolio does not include many pure LLM startups, suggesting he may avoid investing in companies directly competing with OpenAI.

Portfolio

This table represents 42 investments from Brockman’s estimated 39-51 total investments depending on source. Some entry years are approximate based on company founding dates, marked with ~.

In Their Own Words

On computing: “Compute is the currency of intelligence” ².

On AGI: “The fundamental bet is that AGI is possible, and if we are right about that, then it will really change everything. In my mind, the real question is, do you believe in continued AI progress?” ².

On building at scale: “The infrastructure we’re building is at a very different scale from how normal people build. We’re building gigawatts of compute in a very short amount of time” ².

On his identity: “I love to build” (his LinkedIn bio) ².

On execution: “There’s no bend in the scaling laws. The thing that’s hard is execution” ².

On ambition: “Failure is not an option” regarding infrastructure scale at OpenAI ².

On joining OpenAI: He left Stripe because he wanted “something impactful to build once again” ².

What Founders Say

No independently sourced founder testimonials found regarding Brockman’s angel investing activity.

Sources