GT Biopharma is trading at $5.11, up 15.69% in pre-market from its November 6 close of $4.42; no clear company-specific announcement explaining the November 9 move appeared in the available news search. - The latest company release found was its October 26 announcement of a presentation at the SITC 2026 meeting. - No verified November 9 catalyst or reported pre-market volume was found; the move’s reason remains unclear.