BillionToOne CTO David Tsao sells $1.97 million in stock

On September 9, 2026, BillionToOne Inc.'s CTO and Director David Tsao sold approximately $1.97 million worth of shares, following the exercise of stock options. The sale occurred as the stock had gained 54% over the past six months, though it traded 34% below its 52-week high of $150.44. According to InvestingPro, the stock seemed overvalued compared to its Fair Value.

Tsao sold 10,000 shares of Class A Common Stock, with prices fluctuating between $97.54 and $100.00, totaling $1,975,400 in sales. On the same day, he bought back 10,000 shares by exercising options at $2.80 per share, spending $56,000. Both actions were carried out under a Rule 10b5-1 trading plan Tsao set up on June 5, 2026.

Following these transactions, Tsao still owns 1,000 shares of Class A Common Stock and has 560,000 derivative securities (stock options). Investors can find more details on BillionToOne's valuation and executive activity in the InvestingPro Pro Research Report. In other news, BillionToOne's second-quarter earnings exceeded analysts' expectations, with earnings per share reaching $0.15, a significant jump from the expected $0.03.

Revenue for the quarter rose by 64% to $109.4 million. Despite strong results, the stock price dropped in after-hours trading due to investor worries about the company's future prospects and growth potential. Canaccord Genuity started coverage on BillionToOne with a "buy" rating and a price target of $120.00, praising the company's smNGS and QCT technologies in their UNITY and Northstar diagnostic portfolios.