No, the pronoun "they" is a personal pronoun.A personal pronoun is a word that takes the place of a noun for a specific person or thing.They are: I, you, we, he, she, it, me, us, him, her, they, them.A possessive pronoun is a word that takes the place of a noun that belongs to someone or something.They are: mine, yours, his, hers, its, ours, theirs.Example uses:The sisters made dinner. They wanted to surprise the family.The personal pronoun "they" takes the place of the plural noun "sisters".The sisters bought a car. It was theirs to share.The possessive pronoun "theirs" takes the place of the noun "car" belonging to the sisters.Note: Another form of pronoun that shows possession is a possessive adjective.A possessive adjective is placed before a noun to take the place of a possessive noun.They are: my, your, his, her, our, their, its.Example: The sisters take good care of theircar.