Alphatec Holdings is trading 7.98% up at $11.77 versus the October 26 regular-session close of $10.90; no cause for the after-hours rise has been confirmed.

  • Shares closed down 1.89% in the October 26 regular session.
  • Third-quarter results are scheduled for October 29, after the market close; the upcoming report does not establish the cause of the move.
  • Supplied market indices were positive, but no clear market-driven explanation is confirmed.