BillionToOne Co-Founder Sells Shares Worth $1 Million
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 executed 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 over 580,000 unexercised stock options, maintaining strong alignment with company performance. BillionToOne's Class A Common Stock closed at $96.22 on August 26, down from a recent high of $150.44 in early August following the Q2 earnings report. The transaction does not necessarily signal negative sentiment toward the stock and is consistent with pre-established trading rules designed to avoid insider trading concerns.
Topics: executive activity SEC filing stock sale