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David B. Singer is a corporate director and venture investor who serves as a Director of Infleqtion, Inc. (INFQ), having joined the company’s board in 2024.[[2]](https://ir.infleqtion.com/governance)[[4]](https://www.secform4.com/insider-holders/2007825.html) As part of an investor group led by Maverick Capital, funds associated with Singer reported significant beneficial ownership in Infleqtion and executed substantial open‑market share sales in May 2026, reflecting his role as a major insider and financial steward of the company’s post‑listing capital structure.[[4]](https://www.secform4.com/insider-holders/2007825.html)[[6]](https://www.stocktitan.net/sec-filings/INFQ/)
Singer is a Managing Partner at Maverick Capital Ventures, where he leads private investments globally, and has long focused on healthcare, biotech, and technology-driven businesses.[[1]](https://www.allamericanspeakers.com/celebritytalentbios/David+B.+Singer/421681)[[3]](https://www.marketscreener.com/insider/DAVID-SINGER-A02NDU/) Earlier in his career, he co‑founded Affymetrix, Inc. and Corcept Therapeutics Inc., and served as President and CEO of Affymetrix, CEO of GeneSoft Pharmaceuticals (later Oscient Pharmaceuticals), and CFO of Heartport, in addition to prior roles at Baxter International and Goldman Sachs.[[1]](https://www.allamericanspeakers.com/celebritytalentbios/David+B.+Singer/421681)[[3]](https://www.marketscreener.com/insider/DAVID-SINGER-A02NDU/) He has held numerous public and private board positions, including at Castlight Health, Pacific Biosciences of California, Seer, and multiple medical technology and health IT companies, and previously served as a Health Commissioner for the City and County of San Francisco.[[1]](https://www.allamericanspeakers.com/celebritytalentbios/David+B.+Singer/421681)[[3]](https://www.marketscreener.com/insider/DAVID-SINGER-A02NDU/) Singer holds a B.A. from Yale University and an M.B.A. from Stanford University.[[1]](https://www.allamericanspeakers.com/celebritytalentbios/David+B.+Singer/421681)[[3]](https://www.marketscreener.com/insider/DAVID-SINGER-A02NDU/)
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