Groupon, a group buying site, is reportedly working on raised up to $1 billion in new funding after rebuffing a $6 billion buy-out offer from Google.

According to VC Experts a the filing with exact amount raised should be available next week.

The understanding is that the new funds will be used to built its existing business and for overseas expansion.

Similarly, Google had tried to buy Yelp. Yelp walked away from the deal and ended up raising $25 million.