For the coming Lending Club IPO a recent SEC filing reveals details on the valuation of the company.

LendingClub Corporation is offering 50,000,000 shares of its common stock and the selling stockholders are offering 7,700,000 shares of common stock. We will not receive any proceeds from the sale of shares by the selling stockholders. This is our initial public offering and no public market currently exists for our shares of common stock. We anticipate that the initial public offering price will be between $10.00 and $12.00 per share.

After the IPO there will be 361,111,491 shares of common stock outstanding at Lending Club so at 12 US$ per share this will result in a 4.33 US$ billion valuation. Read more details on Lend Academy.