BillionToOne (BLLN) SVP John R. ten Bosch Sells 1,416 Shares

What Happened John R. ten Bosch, Senior Vice President of Laboratory Operations at BillionToOne (BLLN), sold 1,416 shares on September 9, 2026. The shares were sold at $97.54 per share for total proceeds of $138,117. The transaction is reported as a sale (transaction code S) and was effected as an open-market or private sale.

Key Details

• Transaction date and price: 2026-09-09 — 1,416 shares at $97.54 each.
• Total proceeds: $138,117.
• Shares owned after transaction: Not specified in the provided filing.
• Footnote: Transaction was executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 2, 2026.
• Filing date: Form 4 filed 2026-09-11 (appears timely under the two-business-day Form 4 rule).
• Transaction code: S (Sale).

Context Sales under a 10b5-1 plan are prearranged trades and are generally viewed as routine, reducing the weight of such sales as a signal of insider sentiment. The filing does not indicate the reporting person is a 10% owner. This report documents a straightforward disposition of shares rather than an option exercise, gift, or award.