Johnson Nancy JoAnn 4

What Happened

• Nancy JoAnn Johnson, Senior Vice President of Sales and Commercial Operations at BillionToOne (BLLN), sold a total of 14,199 shares in open-market transactions on July 16, 2026 (reported as sales, code S). The four tranches were:
  • 2,133 shares at a weighted average $126.98 — proceeds $270,853
  • 5,559 shares at a weighted average $127.89 — proceeds $710,918
  • 5,601 shares at a weighted average $128.96 — proceeds $722,278
  • 906 shares at a weighted average $129.78 — proceeds $117,580
• Total proceeds across all transactions: approximately $1,821,629. These were sales (not purchases), which are often routine but are useful data points for investors.

Key Details

• Transaction date: 2026-07-16; Form filed: 2026-07-20 (timely — filed within the two business-day window).
• Prices: reported as weighted averages. Footnotes show component price ranges:
  • 2,133-share tranche: $126.33–$127.30 (F2)
  • 5,559-share tranche: $127.445–$128.430 (F3)
  • 5,601-share tranche: $128.475–$129.340 (F4)
  • 906-share tranche: $129.580–$130.010 (F5)
• Transactions effected pursuant to a Rule 10b5-1 trading plan adopted March 6, 2026 (F1).
• Shares owned after transaction: not reported in the information provided in this summary.
• Transaction type: Open-market sales (code S).

Context

• These sales were made under a pre-established 10b5-1 plan, which typically schedules trades in advance and can indicate routine disposition rather than an immediate view on company prospects. This filing does not necessarily imply inside knowledge or a change in outlook.
• For retail investors: purchases tend to carry stronger signals of insider confidence than scheduled sales. No late filing was indicated; the report was submitted within the required timeframe.