If you were hoping to hear the winner of Amazon's second headquarters Thursday, try next time.

Amazon CEO Jeff Bezos said the decision for the winner of the company's second headquarters will not be announced Thursday during his interview at the Economic Club Washington D.C.

"The answer is very simple," Bezos told David Rubenstein, the president of the Economic Club of Washington D.C. and the cofounder of the Carlyle Group. "We will answer the decision before the end of the year."

Bezos reiterated that his team at Amazon is "working hard" to choose the final winner of HQ2, but declined to share further information on the process. The company previously announced 20 finalists, including Washington D.C., northern Virginia, and Montgomery Country, Maryland.

"We will get there," he said.

Bezos also shared more details about his new $2 billion philanthropic fund announced Thursday. The fund, designed to help homeless families and create new preschools, will soon start "hiring an executive team" to operate the preschools, which will be run by Bezos himself, he said.

The size of the fund could potentially grow in the future, he added, stressing the initiative is still at "Day One." As the fund matures, and the team learns more about the business, Bezos said it would expand, as most of his other businesses have done in the past.