To assist California class action defense attorneys predict the cases against which they will have to defend, we provide weekly, unofficial summaries of the legal categories for new class action lawsuits filed in California state and federal courts in the Los Angeles, San Francisco, San Jose, Sacramento, San Diego, San Mateo, Oakland/Alameda and Orange County areas. We include only those categories that include 10% or more of the class action filings during the preceding week. This report covers the time period of December 7 – December 13, 2007, during which time only 39 new class action lawsuits were filed. We have repeatedly noted that labor law class action cases generally top this list, often by a wide margin. This past week saw yet another decline in the total number of employment-related class action lawsuit filings, but nonetheless more labor law class action lawsuits were filed than any other category. Specifically, only a dozen new class actions alleging employment law claims were filed this past week, representing 31% of the total number of new class action filings. Class actions alleging violations of federal securities laws came in second with 8 new filings (21%), followed by class actions alleging violations of California’s unfair competition law (UCL), which include false advertising claims, and antitrust class actions, which tied for third with 6 new class action filings (representing 15% each of the total new class action cases). No other category passed the 10% threshold.