Applied Optoelectronics is trading 4.06% down in after-hours trading at $119.75 after no clear company-specific catalyst was identified for August 21, 2026.

  • Latest listed releases were its August 6 second-quarter results and August 7 equity grants.
  • No newer announcement appears on its investor-relations page.
  • The Nasdaq Composite rose 1.82% and the S&P 500 gained 0.36%, unlike the decline.