Possible Clues:

• 'Monsters, Inc.' studio
• Company whose movies, not counting sequels, are all included in this puzzle [Circled Squares: 2009]
• Its mascot is a small desk lamp
• "Up" studio
• The producer of 18-, 23-, 49-, and 56-Across...or, when you say it out loud, what each answer does to one of the characters from the original movie?
• "Brave" studio
• 'Brave' studio
• Film studio behind 'Toy Story' and 'Up'
• Entertainment giant with a 1995 I.P.O.
• Film studio spearheaded by 57-Across