Content management software firm Interwoven said Wednesday it bought financial services software outfit Scrittura for $16.3 million cash in a move that adds big names like AIG International and Bear Stearns to its customer list.

Under terms of the deal, Sunnyvale, California-based Interwoven said it would also pay up to $2 million more cash if privately held Scrittura meets certain revenue and other goals by December 31.

Interwoven said the acquisition would trim third-quarter earnings by up to $0.02 per share excluding special items. In the fourth quarter, the deal is expected to be neutral to earnings or boost them slightly, the company said in its statement.

Interwoven stock closed up $0.20 at $7.51 on the Nasdaq.

New York-based Scrittura provides document automation technology for financial trading that is not done on exchanges, such as the over-the-counter trading of derivatives.

Comprehensive Product

Interwoven said the purchase allows it to offer a comprehensive product for helping automate OTC derivatives trading. As a result, the company gets greater exposure to the OTC derivatives market that the Bank for International Settlements estimates at $220 trillion.

What’s more, the takeover adds some attractive clients to Interwoven’s customer base, including Wachovia Bank and the Royal Bank of Scotland. The company, which calls itself an enterprise content management provider, now boasts having 19 of the top 25 financial services outlets on the Financial Times 500 list.

On July 21, Interwoven posted second-quarter profits of $2.5 million, excluding special items, on 4 percent higher revenue of $41 million vs. profit of $723,000 in the year-ago quarter.

Private equity backers in Scrittura included LV Equity Partners, Walden Capital Partners, Penny Lane Partners, Hudson Venture Partners, and Middlebury Venture Partners.