Amkor Technology is trading at $78.89 (20.8% up) in after-hours trading after Fitch Ratings affirmed its Long-Term Issuer Default Rating at BB+ and revised its outlook to Stable.

  • Fitch cited the company's Arizona expansion plans as a key driver for accelerated revenue growth, which is expected to offset near-term free cash flow pressure.
  • The sharp upward move follows the stock's previous close of $65.33 on July 23, 2026.
  • The ratings agency's revision reflects confidence in the company's long-term strategic positioning within the semiconductor packaging industry.