Google Inc. filed plans today to sell another 5.3 million shares hoping to raise more than $2 billion to finance its expansion plans and smooth its addition to the S&P 500 Index, The Wall Street Journal reported.

In a statement, Google said the surprise offering will "partially meet the anticipated needs of index funds" to purchase Google shares when the Internet giant is added to the S

&P 500 on Friday. Google's stock has been in high demand ahead of its inclusion in the index.

Google said it will use proceeds from the sale for "general corporate purposes," including potential acquisitions. But the company added in a filing with the Securities & Exchange Commission that it had "no current agreements or commitments with respect to any material acquisitions."

Google shares fell in after hours trading, slipping $12.38, or 3%, to $382.60. The stock had ended the Nasdaq Stock Market session up 4.7%, or $17.78, at $394.98.