BillionToOne Co-Founder Sells $1 Million Worth of Shares
David Tsao, co-founder and CTO of BillionToOne (NASDAQ: BLLN), sold 10,000 shares of Class A Common Stock on August 25, 2026. The transaction was conducted under a Rule 10b5-1 trading plan established in March 2026, indicating it was pre-scheduled and not discretionary. Tsao exercised stock options with an exercise price of $2.80 before selling the shares at a weighted average price of $100 per share. The sale reduced his direct equity stake to 1,000 shares but left him holding 580,000 remaining stock options, maintaining strong alignment with company performance. The transaction occurred after BillionToOne's stock had declined from its recent high and followed the release of second-quarter earnings that disappointed investors. BillionToOne operates in precision diagnostics using proprietary molecular counting technology to detect DNA molecules accurately. As of August 26, 2026, shares closed at $96.22 with a market cap of $4.4 billion.
Tickers: $BLLN
Topics: insider trading SEC Form 4 stock options