After recently being valued at $50 billion following a round of financing that raised $1.5 billion, Facebook is considering allowing employees sell their shares in an offering that would now value the social-networking company at $60 billion, reports Bloomberg.

An employee stock sale, which could raise as much as $1 billion, would allow large institutions to invest in the company, the story says.

A spokesman for Facebook declined to comment, the article notes.

The stock sale would provide a windfall for employees as they wait for the company to sell shares to the public, it notes.

The article points out that Facebook allowed employees to sell as much as $100 million in stock for $14.77 a share in 2009, under an agreement with Russian investment firm Digital Sky.