BillionToOne (BLLN) CEO Atay Oguzhan Sells 15,539 Shares After Exercising Options

What Happened

• Atay Oguzhan, Chairman and CEO of BillionToOne, exercised options to acquire 15,539 shares at $2.80 per share (cost $43,509) and then sold those 15,539 shares in an open‑market transaction on Aug 5, 2026. The shares were sold at a weighted average price of $150.03 per share for total gross proceeds of approximately $2,331,352. The filing shows both the option exercise (code M) and the open‑market sale (code S).

Key Details

• Transaction date: 2026-08-05; Form 4 filed 2026-08-07 (timely).
• Exercise price: $2.80 per share; exercise cost reported $43,509.
• Sale price: weighted average $150.03; range reported $150.00–$150.26 per share; total sale proceeds ≈ $2,331,352.
• Shares involved: 15,539 acquired via exercise and 15,539 sold.
• Footnotes: (F1) trades were effected under a Rule 10b5‑1 plan adopted Mar 6, 2026; (F2) sale price is a weighted average with a disclosed range; (F3) options were fully vested and exercisable.
• Shares owned after the transaction: not specified in the provided filing details.

Context

• This was an option exercise immediately followed by an open‑market sale (commonly a cashless or same‑day disposition), so the insider converted options into stock and sold them rather than holding newly acquired shares.
• The trade was executed under a prearranged 10b5‑1 plan, which typically schedules sales in advance and is intended to avoid perceived opportunistic timing by insiders.