# Arvid Lunnemark

> Arvid Lunnemark is a Swedish mathematician, software engineer and founder who co-created Anysphere and its AI code editor Cursor after meeting his three co-founders at MIT. An International Mathematical Olympiad gold medallist and International Olympiad in Informatics silver medallist, he helped turn a fascination with language models into an editor designed around speed, iteration and human judgment. In 2025 he left his operating role at Cursor to launch Integrous Research, a San Francisco company focused on systems for safer AI.

- **Role:** Founder and CEO at Integrous Research
- **Organizations:** Integrous Research, Anysphere, Cursor, Massachusetts Institute of Technology, Stripe, Jane Street
- **Nationality:** Swedish
- **Education:** Bachelor's degree; mathematics, Massachusetts Institute of Technology, Upper-secondary education, Malmö Borgarskola
- **Known for:** Gold medal, 2018 International Mathematical Olympiad; 27th overall with 32 points., Bronze medal, 2017 International Mathematical Olympiad., Silver medal, 2017 International Olympiad in Informatics; 46th of 304 contestants.

## Career timeline

- **2016** — Won a silver medal with Sweden's team at the European Union Science Olympiad in Tartu.
- **2017** — Won bronze at the International Mathematical Olympiad and silver at the International Olympiad in Informatics; also competed for Sweden in European physics competitions.
- **2018** — Won gold at the International Mathematical Olympiad, placing 27th overall with 32 points, and began studying at MIT.
- **2019-2021** — Completed software engineering and quantitative-trading internships, including roles at Stripe and Jane Street.
- **2020** — Taught a public MIT Educational Studies Program class on Sperner's lemma and fair division.
- **2022** — Graduated from MIT and co-founded Anysphere with Michael Truell, Aman Sanger and Sualeh Asif; co-authored research defining metadata-private messaging.
- **2023** — Anysphere launched Cursor; Lunnemark published his case for 'prompt design' and released the JSX-based Priompt library.
- **2024** — Appeared with the Cursor founding team on the Lex Fridman Podcast and discussed editor design, speed and next-action prediction.
- **2025** — Left his operating role at Cursor and launched Integrous Research to work on systems for safer AI.
- **2026** — Forbes reported SpaceX's $60 billion acquisition of Cursor and estimated Lunnemark's net worth at $2.6 billion as of September 10.

## Achievements

- Gold medal, 2018 International Mathematical Olympiad; 27th overall with 32 points.
- Bronze medal, 2017 International Mathematical Olympiad.
- Silver medal, 2017 International Olympiad in Informatics; 46th of 304 contestants.
- Co-founded Anysphere and helped create the Cursor AI code editor.
- Created Priompt, an open-source JSX-based prompt-design library.
- Co-authored a formal security definition for metadata-private messaging.

## Latest updates

- **2026-09** — Forbes listed Lunnemark's real-time net worth at $2.6 billion and his residence as San Francisco.
- **2026-08** — Forbes reported that SpaceX acquired Cursor for $60 billion and that each co-founder received SpaceX shares worth an estimated $2.4 billion at closing.
- **2025-10** — Lunnemark left his operating role at Cursor to focus on Integrous Research and safer AI systems.

## Links

- Website: https://arvid.xyz/
- LinkedIn: https://www.linkedin.com/in/arvid-lunnemark
- Twitter/X: https://x.com/ArVID220u
- GitHub: https://github.com/arvid220u
- YouTube: https://www.youtube.com/watch?v=oFfVt3S51T4

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Profile page: https://yespress.io/arvid-lunnemark
Published by YesPress — https://yespress.io
Last updated: 2026-09-26