Alice Schwartz, 97, is the U.S.' oldest billionaire who earned her fortune in healthcare, according to Forbes' live net worth tracker.
Ms. Schwartz, who has a real-time net worth of $1.7 billion, started Bio-Rad Laboratories with her husband in 1952.
She and her husband launched the company in California with $720 in savings. Bio-Rad now sells 10,000 life science research and clinical diagnostics products, and its 2022 revenue was $2.8 billion.
Ms. Schwartz stepped down from the company's board in 2012, appointing her son as its chairman and CEO.