Almost all the other winners can be seen in relation with a transit. Lilith in Virgo and NN in Libra. Exception is Jeffrey Tambor with Cancer Sun but natal Jupiter in Leo.
Best Performance by an Actor in a Motion Picture — Comedy or Musical WINNER: Michael Keaton (Virgo Sun, Jupiter Aries, Pluto Leo)- Birdman
Best Performance by an Actress in a Supporting Role in a Series, Miniseries or Motion Picture Made for Television WINNER: Joanne Froggatt (Virgo Sun, Leo Merc & NN) - Downton Abbey
Best Performance by an Actor in a Supporting Role in a Series, Miniseries or Motion Picture Made for Television WINNER: Matt Bomer (Libra Sun & NN) - The Normal Heart
Best Performance by an Actor in a Television Series — Comedy or Musical WINNER: Jeffrey Tambor (Cancer Sun, Jupiter in Leo) — Transparent
1) Best Performance by an Actress in a Motion Picture — Drama
WINNER: Julianne Moore ( Sag Sun ) - Still Alice
Jennifer Aniston - Cake
Felicity Jones - The Theory Of Everything
Rosamund Pike - Gone Girl
Reese Witherspoon - Wild
Julianne Moore, Libran 5th house, Neptune/Sc/H/5, AC~=Moon/Gem/H/12
2) Best Performance by an Actress in a Motion Picture — Comedy or Musical
WINNER: Amy Adams (Leo Sun) - Big Eyes
Emily Blunt - Into The Woods
Helen Mirren - The Hundred-Foot Journey
Julianne Moore - Maps to the Stars
Quvenzhane Wallis - Annie
3) Best Performance by an Actress in a Supporting Role in a Motion Picture
WINNER: Patricia Arquette (Aries Sun) - Boyhood
Jessica Chastain - A Most Violent Year
Keira Knightley - The Imitation Game
Emma Stone - Birdman
Meryl Streep - Into The Woods