To assist class action defense attorneys anticipate the types of cases against which they will have to defend in California, 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. This report covers the time period from July 23 – 29, 2010, during which time 47 new class actions were filed in these California state and federal courts. Labor law class actions returned to familiar territory, accounting for more than half of all class actions filed during this reporting period with 27 new class actions (representing 57% of the total number of new class actions filed). In distant second, the only other category to break the 10% threshold involved California’s Unfair Competition Law (UCL), which includes false advertising with 5 new filings (representing 11% of the total number of new class actions filed).