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. This report covers the time period from February 26 – March 4, 2010, during which time 54 new class actions were filed in these California state and federal courts. Readers know well that labor law class actions generally top this list by a wide margin, and this yet again proved true though the percentage of such class action claims was lower than usual. During this reporting period, 25 new labor law class actions were filed, representing 46% of the total number of new class actions filed. The only other categories to break the 10% threshold involved class actions alleging violations of California’s Unfair Competition Law (UCL), which includes false advertising claims, with 11 new class action lawsuits (20% of the new class actions filed during the reporting period), and class actions alleging violations of federal securities laws, with 6 new filings (11% of the total number of class action filings).