Just two days before its initial public offering, Facebook has increased the number of shares it will offer by 25%. The social networking giant will now offer 421 million shares to investors, 83.8 million shares more than it had originally planned to make available. Facebook is looking to price its stock between $34 and $38 per share, potentially allowing the company to raise more than $16 billion, making it the largest technology IPO and third-largest of all time behind Visa and GM. Fortune notes that the share increase will not affect Facebook’s valuation, however, as the extra shares are being reallocated out of the company’s existing share count. Facebook will be listed on the NASDAQ under ticker symbol FB.