David Harbour leads trader sentiment for the 2026 Emmy in Outstanding Supporting Actor in a Limited or Anthology Series or Movie at 72.3% implied probability, driven by “DTF St. Louis” earning 13 nominations overall and strong critical praise for his nuanced turn as Floyd, an ASL interpreter in a dark suburban comedy. Harbour’s strategic submission of a standout episode differentiates him from co-stars Jason Bateman and Richard Jenkins, mitigating vote-splitting risks in a category where the HBO series dominates the slate. Charles Melton sits second at 23.9% thanks to his empathetic performance in the returning “Beef,” which secured key nods and positive reception, though the show trails “DTF St. Louis” in overall momentum. With the Sept. 14 ceremony approaching, recent guild and critics’ signals reinforce Harbour’s frontrunner status while leaving room for late shifts.