• BillionToOne Chairman and CEO Oguzhan Atay reported option exercises for 26,250 Class A common shares at USD 2.8 on July 6, 2026.
• He sold 26,250 Class A common shares on July 6, 2026 at weighted-average prices ranging from USD 118.49 to USD 124.61.
• His direct holding of Class A common stock fell to zero following the transactions.
• Separately, sales were reported in shares held by his spouse, leaving 175,000 Class A common shares indirectly owned.

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