Johnson Nancy JoAnn 4

What Happened
Nancy JoAnn Johnson, Senior Vice President of Sales and Commercial Operations at BillionToOne (BLLN), sold a total of 14,000 shares in open‑market transactions on June 8–9, 2026 for aggregate proceeds of approximately $1,402,539. The sales were executed in multiple lots: 2,918 shares at a weighted avg $99.09 ($289,135); 300 shares at $100.05 ($30,015); 200 shares at $100.98 ($20,197); 4,666 shares at $99.27 ($463,204); 2,700 shares at $101.38 ($273,714); 1,816 shares at $102.34 ($185,843); and 1,400 shares at $100.31 (~$140,431). These were sales (not purchases).

Key Details

• Transaction dates: June 8–9, 2026; Form 4 filed June 10, 2026 (no late filing indicated in the provided data).
• Total shares sold: 14,000; total proceeds: ~$1,402,539.
• Reported prices are weighted averages; per-footnote price ranges for each lot:
  • 2,918 shares: $98.90–$99.69
  • 300 shares: $99.96–$100.22
  • 200 shares: $100.98–$100.99
  • 4,666 shares: $98.90–$99.87
  • 2,700 shares: $100.99–$101.71
  • 1,816 shares: $101.99–$102.57
  • 1,400 shares: $99.99–$100.72
• Trades were executed pursuant to a Rule 10b5‑1 trading plan adopted March 6, 2026 (pre‑arranged plan).
• Shares owned after the transactions: not specified in the information provided.

Context
These sales were made under a 10b5‑1 plan, which generally indicates pre‑planned, routine dispositions and does not by itself imply a change in the insider’s view of the company. For retail investors, purchases typically carry more weight as a bullish signal; routine sales under an established plan are common for liquidity or diversification.