Atay Oguzhan 4

What Happened
Atay Oguzhan, BillionToOne's Chairman and CEO, exercised 26,250 stock options at $2.80 per share (total exercise cost $73,500) and sold a total of 65,000 shares in multiple open-market transactions on July 6, 2026. The open-market sales were transacted at prices roughly in the $118.05–$124.74 range (reported as various weighted averages) and generated approximately $4.80 million in proceeds. Most activity was sales (routine monetization) rather than a fresh purchase.

Key Details

• Transaction date: July 6, 2026; Form 4 filed July 8, 2026 (filed within the normal 2-business-day window).
• Options exercised: 26,250 shares at $2.80 (fully vested/exercisable per filing). Total exercise cost shown $73,500.
• Shares sold: 65,000 shares across many trades; reported proceeds ≈ $4,802,880. Sale prices reported as weighted averages with detailed price ranges in filing footnotes (approx. $118.05–$124.74).
• Footnotes: Sales were effected under a Rule 10b5‑1 trading plan adopted March 6, 2026 (F1). Several weighted‑average price footnotes (F2–F15) note the exact per‑trade price ranges; F10 indicates some shares are held by the reporting person’s spouse; F16 notes options are fully vested.
• Shares owned after transaction: not specified in the data provided in your summary.

Context

• Derivative explanation: the "M" code indicates option exercise/conversion. Here Oguzhan exercised options and the resulting shares were sold the same day under the trading plan (typical for cashless/monetization transactions).
• A prearranged 10b5‑1 plan reduces timing concerns but does not indicate the insider’s current view of the company; it documents that trades followed a preset plan.
• This filing reflects significant liquidity taken by the CEO but is routine when done under a documented trading plan; do not infer company fundamentals solely from this sale.