The magician pulled a rabbit out of his hat.

Who is "his" in this prior sentence?
The magician
Chuck Norris can beat any man in a fight, unless he is tied up and blindfolded.

Who is "he" in this prior sentence?
Chuck Norris
Western Digital may disappoint their shareholders this season since they have slowed down production in their Thailand factories due to flooding.

Who is "they" in this prior sentence?
Western Digital