The latest, filed on February 20th in Wisconsin, is "Ladik v Wal-Mart Stores." As Bloomberg reports, it represents five female Wisconsin plaintiffs with the lead one being Sandra Ladik. The suit is a regional umbrella one covering not only WI but also Illinois, Indiana, and Michigan. Employed by Wal-Mart from 1992 to 2006, Ladik contends she was paid less than the male employee she trained. She had been head of the maintenance department.
So far the regional suits haven't been faring too well. The date this one was filed the one in Tennessee was tossed because the judge ruled it had been filed too late but said nothing about the merits of the case. The one filed in Dallas had been dismissed in late 2012.
However, all the plaintiffs need is for one suit to get to trial. That will re-energize all the women who claim they had been shortchanged on the basis of gender in wages and promotions. In some ways, these regional suits are analogous to the 14 class action suits filed against law schools by alumni claiming the schools issued misleading information about job placement. Many of the suits have been dismissed, with the exception of those in California. If those get to a courtroom or settlement, the plaintiffs in the other suits might reconfigure their arguments and try again.