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 May 7 – 13, 2010, during which time 51 new class actions were filed in these California state and federal courts. While labor law class actions generally top the list by a wide margin — often accounting for more than half of the new class action filings in any particular week — this past week only 22 new labor law class actions were filed, representing only 43% of the total number of new class actions filed. Three other categories managed to break the 10% threshold: class actions alleging violations of California’s Unfair Competition Law (UCL), which includes false advertising claims, with 9 new filings (representing 18% of the total number of new class actions filed); class actions against Toyota arising out of alleged product defects, with 7 new filings (14% of the total number of new class actions filed); and class actions alleging violations of federal securities laws, with 5 new filings (10% of the total number of new class actions filed).