Zynga today disclosed in an SEC filing that it is planning to raise up to $1 billion in an initial public offering that could value the company at around $7 billion. It will offer 100 million Class A shares at between $8.50 and $10 per share, representing a 14.3% float of outstanding shares.

There also is an underwriter “over-allotment” of 15 million shares, which could slightly increase both the amount raised and the valuation. The valuation also would be increased by including certain options and restricted stock grants, although that would lower the float percentage (sorry to be so confusing).

Zynga will trade on the Nasdaq under ticker symbol ZNGA, with Morgan Stanley and Goldman Sachs serving as co-lead underwriter.

Company founder and CEO Mark Pincus is not selling any shares in the offering, nor is Zynga’s largest venture capital investor, Kleiner Perkins Caufield & Byers. Other VCs, however, are planning to unload between 7% and 8% of their holdings is underwriters exercise their over-allotment. These include Institutional Venture Partners, Union Square Ventures, Avalon Ventures and Foundry Group.

The company plans to kick off its official road-show on Monday, but a version of its electronic road-show is now online. You can watch it here.

Sign up for my daily email newsletter on deals and deal-makers: GetTermSheet.com