# Jonathan Birnbaum

> Jonathan Birnbaum is the founder and CEO of OpenYield, a New York-based fixed income marketplace that brings an equity-like, fully automated trading experience to bonds. A former US credit trading COO at Morgan Stanley and fixed income execution lead at Bridgewater Associates, he later helped build consumer investing platforms as general manager of SoFi Invest and founding COO of Domain Money. He founded OpenYield in 2023 to make bonds cheap and easy to trade for retail investors, backed by a 2026 Series A of more than $6 million from investors including LeveL Markets, Draper Associates, Canapi Ventures and Clocktower Ventures.

- **Role:** Founder & CEO at OpenYield
- **Organizations:** OpenYield, Domain Money, SoFi, Bridgewater Associates, Morgan Stanley
- **Nationality:** American
- **Education:** B.S. in Electrical Engineering and Computer Science (Computer Science and Finance), Massachusetts Institute of Technology (MIT), MBA, Columbia Business School
- **Known for:** Founded OpenYield, a FINRA-registered broker-dealer and SEC-registered alternative trading system (ATS) for bonds, Launched OpenYield's fully automated, all-to-all bond marketplace with 100% firm quotes and no minimums, Closed over $6 million in Series A funding in 2026

## Career timeline

- **2008** — Started career as a trader on Morgan Stanley's emerging markets credit desk during the financial crisis
- **2010s** — Became COO of US credit trading and VP at Morgan Stanley, focused on capital allocation and front-office tools
- **2016** — Completed MBA at Columbia Business School
- **2010s-2020s** — Led fixed income execution at Bridgewater Associates
- **2020s** — General manager of SoFi Invest, building consumer investing products
- **2020s** — Founding COO of Domain Money
- **2023** — Founded OpenYield to modernize the retail bond market
- **2024** — OpenYield Trading LLC printed its first trade on March 28, 2024, launching the platform
- **2026** — Closed $6M+ Series A led by LeveL Markets with Draper Associates, Canapi Ventures and Clocktower Ventures

## Achievements

- Founded OpenYield, a FINRA-registered broker-dealer and SEC-registered alternative trading system (ATS) for bonds
- Launched OpenYield's fully automated, all-to-all bond marketplace with 100% firm quotes and no minimums
- Closed over $6 million in Series A funding in 2026
- Secured LeveL Markets as a strategic investor and distribution partner integrating OpenYield into an equities platform
- Built consumer investing platforms as GM of SoFi Invest and founding COO of Domain Money
- Held senior trading and operating roles at Morgan Stanley and Bridgewater Associates

## Latest updates

- **2026-06** — OpenYield closed a Series A of more than $6 million and landed LeveL Markets as a strategic investor and distribution partner, integrating OpenYield's bond liquidity into an equities trading platform.
- **2024-03** — OpenYield launched its platform, printing its first trade on March 28, 2024.

## Links

- Website: https://openyld.com
- LinkedIn: http://www.linkedin.com/in/jonbirn

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Profile page: https://yespress.io/jonathan-birnbaum
Published by YesPress — https://yespress.io
Last updated: 2026-07-16