# Brandon Sim

> Brandon K. Sim is president and chief executive officer of Astrana Health. A Harvard graduate in statistics, physics, and computer science and engineering, he worked as a quantitative researcher at Citadel Securities before joining the company in 2019. His career spans startup cofounding, astronomical data-analysis publications, software engineering, and operations leadership.

- **Role:** President and Chief Executive Officer at Astrana Health
- **Organizations:** Astrana Health, Citadel Securities, Theratech, Cardio Diagnostics, Clinigence Holdings
- **Education:** B.A. in Statistics and Physics, magna cum laude with high honors, Harvard University, M.S. in Computer Science and Engineering, Harvard University, High school, Diamond Bar High School
- **Known for:** 2011 U.S. Presidential Scholar, Six-time American Invitational Mathematics Exam qualifier, as reported by his school in 2011, Harvard graduate, magna cum laude with high honors

## Career timeline

- **2011** — Named a U.S. Presidential Scholar; entered Harvard that fall.
- **2012-2014** — Served as Theratech CTO, according to the February 2021 company filing; the current corporate biography also identifies him as a cofounder.
- **2015** — Coauthored FATS: Feature Analysis for Time Series.
- **2015-2019** — Quantitative researcher at Citadel Securities.
- **2016** — Coauthored an Astronomical Journal paper on ensemble outlier detection.
- **2019-06** — Joined ApolloMed as project manager.
- **2019-09** — Promoted to interim CTO.
- **2020-02** — Named CTO and vice president of engineering.
- **2020-05** — Named interim co-chief operating officer alongside Eric Chin.
- **2021-02** — Appointed chief operating officer while retaining technology responsibilities.
- **2021-11** — Appointed co-chief executive officer, effective November 2.
- **2024-01** — Appointed president and CEO, effective January 19.
- **2024-03** — Rang Nasdaq closing bell on March 4.
- **2026-06** — Won EY Entrepreneur Of The Year Greater Los Angeles award.

## Achievements

- 2011 U.S. Presidential Scholar
- Six-time American Invitational Mathematics Exam qualifier, as reported by his school in 2011
- Harvard graduate, magna cum laude with high honors
- Coauthor of FATS: Feature Analysis for Time Series (2015)
- Coauthor of a 2016 Astronomical Journal paper on ensemble outlier detection
- 2026 EY Entrepreneur Of The Year Greater Los Angeles award winner
- Listed in the Los Angeles Business Journal LA500 for three years as of May 2026

## Latest updates

- **2026-07** — Announced appointments of Daniel Rothman and Vishal Gupta to strengthen enterprise leadership and operations.
- **2026-06** — Named an EY Entrepreneur Of The Year Greater Los Angeles award winner on June 11.
- **2026-05** — Featured in the Los Angeles Business Journal LA500 for a third year.
- **2026-03** — Astrana reported 2025 revenue of $3,181.8 million, up 56% year over year.

## Links

- Website: https://www.astranahealth.com/member/brandon-sim/
- LinkedIn: https://www.linkedin.com/in/brandonsim
- Twitter/X: https://x.com/brandonksim

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Profile page: https://yespress.io/brandon-sim
Published by YesPress — https://yespress.io
Last updated: 2026-10-22