NEW YORK (AP) — Amazon founder and CEO Jeff Bezos says he will start a $2 billion charitable fund to help homeless families and open new preschools in low-income neighborhoods.

Bezos, whose stake in Amazon is worth about $160 billion, says the he’ll call it the Bezos Day One Fund. An Amazon.com Inc. spokeswoman said the $2 billion will all come from Bezos.

Bezos made the announcement Thursday in a tweet and a post on his Instagram account.