LinkedIn Corp. announced plans for the offering Monday, saying employees and early backers planned to sell 6.7 million shares to reap gains from the quick run-up in the company's stock after it went public in May. Wednesday's announcement shows that amount has risen.

The sale of LinkedIn's 1.3 million shares at the offering price would bring in $91 million. It plans to use the funds to help finance its expansion.

LinkedIn said its underwriters also have a 30-day option to buy up to 1.3 million more shares to cover over-allotments.