As a resource to California class action defense attorneys, 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 relevant timeframe. Because of the holidays, this report covers the time period from December 18 – 30, 2009, during which time 59 new class action cases were filed in these California state and federal courts. Generally, labor law class actions top this list by a wide margin, as they frequently account for more than half of the total number of new class action lawsuits filed. During this reporting period, there were 29 new class actions alleging employment-related claims, representing only 49% of the total number of new class actions filed). The only other category to break the 10% threshold involved class actions alleging violations of California’s Unfair Competition Law (UCL), which includes false advertising claims, with 16 new class action lawsuits (27% of the new class actions filed during the reporting period).