Spencer Rascoff and team Zillow ringing the opening bell on Nasdaq in July 2011.

Zillow is looking to fill its coffers with even more cash, a move that comes just 14 months after the Seattle online real estate conducted an initial public offering that raised more than $75 million. This time Zillow is selling 3.175 million shares of Class A common stock, with certain existing shareholders (including co-founders Rich Barton and Lloyd Frink) planning to sell an additional 325,000 shares.

Trulia, Zillow’s San Francisco rival, filed for its own initial public offering recently, one that could raise up to $75 million.

Zillow raised more than $75 million through its IPO, pricing the shares at an offering price of $20. The stock has performed well on Wall Street, one of the best performing new tech issues in recent years. The stock is now trading at more than $42 per share, with a market value of $1.2 billion. (Shares were up more than two percent today in regular trading, but are falling in after-hours trading).

At the end of the second quarter, Zillow had about $70 million in cash, cash equivalents and short-term investments on the books. The company is profitable, posting net income of $1.3 million during the second quarter.

According to the filing, Zillow could use the funds for sales and marketing activities and other general corporate purposes, as well as possible acquisitions or investments in new technologies. Zillow, as we’ve reported in the past, has been highly acquisitive, with the purchases of three companies in the past two years. It also has expanded its headquarters in Seattle, and moved into larger digs in southern California with room for as many as 100 employees.

The offering will be conducted by Citigroup and Goldman Sachs, with Allen & Company, Pacific Crest Securities, ThinkEquity and Canaccord Genuity also participating as co-managers. The offering price has not yet been set.

More on the offering in this SEC filing.

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