# David Kestenbaum

> David Kestenbaum is the San Antonio-based co-founder and CFO of Cauldron Ferm, an Australian-American biomanufacturing company pursuing lower-cost, continuous precision fermentation. A finance-trained operator and investor, he spent more than a decade at Anheuser-Busch InBev and its venture arm ZX Ventures, where he helped build e-commerce operations and later managed a roughly $350 million venture portfolio. He now applies that experience to Cauldron's capital-intensive scale-up and to early-stage investing in Texas.

- **Role:** Co-founder and CFO at Cauldron Ferm
- **Organizations:** Cauldron Ferm, VentureSTX, Alamo Angels, ZX Ventures, Anheuser-Busch InBev, Disruption Labs, PLANETARIANS, Appito, BioBrew, Cerveza Siempre
- **Education:** MBA, Washington University in St. Louis - Olin Business School, BBA in Finance, The University of Texas at Austin - McCombs School of Business
- **Known for:** Managed a roughly $350 million venture portfolio at ZX Ventures that Main Sequence describes as delivering top-quartile returns., Helped develop ZX Ventures' venture studio model and contributed to the team that built an e-commerce business exceeding $1 billion for AB InBev., Co-founded Cauldron Ferm, which has demonstrated continuous fermentation with synthetic-biology strains at 10,000-liter scale.

## Career timeline

- **2011-2015** — Held commercial effectiveness, trade promotion and key-account strategy roles at Anheuser-Busch InBev.
- **2015-2019** — Led e-retail and e-commerce strategy roles for AB InBev and ZX Ventures across global and Middle Americas markets.
- **2017** — Founded Cerveza Siempre in Mexico.
- **2019-2022** — Served as a global vice president and then general partner at ZX Ventures, leading a roughly $350 million venture portfolio and the venture studio practice.
- **2022** — Co-founded Cauldron Ferm with Michele Stansfield and became its CFO.
- **2023-2024** — Served on the advisory board of Disruption Labs.
- **2024-2025** — Served on the board of Alamo Angels.
- **2026** — Named as a founding partner of VentureSTX and taught an Alamo Angels masterclass on disciplined angel investing.

## Achievements

- Managed a roughly $350 million venture portfolio at ZX Ventures that Main Sequence describes as delivering top-quartile returns.
- Helped develop ZX Ventures' venture studio model and contributed to the team that built an e-commerce business exceeding $1 billion for AB InBev.
- Co-founded Cauldron Ferm, which has demonstrated continuous fermentation with synthetic-biology strains at 10,000-liter scale.
- Helped Cauldron reach a $13.25 million Series A2 round in 2026, bringing company-reported total funding to $26 million.
- Included in the Bioeconomy 500 for 2025 as an outstanding leader in bioeconomy development and deployment.

## Latest updates

- **2026-04** — Led an Alamo Angels masterclass in San Antonio on portfolio construction, follow-on investing, write-offs and patience in early-stage investing.
- **2026-03** — Cauldron announced a $13.25 million Series A2 round led by Main Sequence Ventures and recognition on Fast Company's 2026 Most Innovative Companies list.
- **2026-02** — Appeared at the iFAB Biomanufacturing Summit on panels about precision-fermented food ingredients and regional biomanufacturing ecosystems.
- **2025-06** — Cauldron was selected as a 2025 Technology Pioneer by the World Economic Forum.

## Links

- Website: https://www.cauldronferm.com
- LinkedIn: https://www.linkedin.com/in/david-kestenbaum-6a430640

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Profile page: https://yespress.io/david-kestenbaum
Published by YesPress — https://yespress.io
Last updated: 2026-09-28