Sellas Life Sciences is trading 4.37% down now at $12.90 after no clear company-specific catalyst emerged in available September 11, 2026 coverage.

  • The latest identified announcement, published September 2, concerned planned preclinical SLS009 pancreatic-cancer data presentations at the 2026 AACR Conference.
  • That announcement was not a same-day event directly explaining the decline.
  • The broader market is rising; a delayed or undisclosed catalyst remains possible.