Shan Riku Sakakibara

Companies

• BillionToOne (United States)Chief Product Officer Nov 5, 2025 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• BillionToOne (United States) BLLN196,500 shares²$20.0M at $101.59Sep 10, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Sep 10, 2026Gift 3,500 shares of BillionToOne (United States)²
• Jul 31, 2026Sold 4,000 shares at $140.21 of BillionToOne (United States)³
• Jul 9, 2026Sold 1,354 shares at $125.00 of BillionToOne (United States)⁴
• Jul 9, 2026Sold 1,355 shares at $125.00 of BillionToOne (United States)⁴
• Jul 9, 2026Sold 1,117 shares at $125.00 of BillionToOne (United States)⁴
• Jul 9, 2026Sold 174 shares at $125.00 of BillionToOne (United States)⁴
• Jul 9, 2026Sold 4,000 shares at $125.00 of BillionToOne (United States)⁴
• Jul 9, 2026Exercised options 1,354 shares at $30.78 of BillionToOne (United States)⁴
• Jul 9, 2026Exercised options 1,355 shares at $30.78 of BillionToOne (United States)⁴
• Jul 9, 2026Exercised options 1,117 shares at $30.78 of BillionToOne (United States)⁴
• Jul 9, 2026Exercised options 174 shares at $8.65 of BillionToOne (United States)⁴
• Jun 24, 2026Sold 4,000 shares at $110.00 of BillionToOne (United States)⁵
• Jun 24, 2026Sold 4,000 shares at $110.00 of BillionToOne (United States)⁵
• Jun 24, 2026Exercised options 4,000 shares at $8.65 of BillionToOne (United States)⁵
• Jun 8, 2026Sold 4,000 shares at $100.00 of BillionToOne (United States)⁶
• Jun 8, 2026Sold 4,000 shares at $96.45 of BillionToOne (United States)⁶
• Nov 7, 2025Other 220,000 shares of BillionToOne (United States)⁷
• Nov 7, 2025Other 220,000 shares of BillionToOne (United States)⁷