Paul Giamatti and Andrew Garfield lead the early 2027 Best Supporting Actor market at 27.5% and 26.5% implied probability, respectively, reflecting strong industry positioning for their upcoming projects. Giamatti benefits from consistent Academy favor and a likely A24 vehicle, while Garfield’s recent New York Film Festival buzz around “Artificial” has narrowed the gap. Sam Rockwell, Robert Pattinson, and Edward Norton trail at lower odds, underscoring a wide-open field where guild precursors, festival reviews, and late-year releases will determine momentum. Traders view the race as fluid, with no dominant frontrunner yet amid overlapping historical precedents for supporting performances.