Three former nonequity shareholders at Ogletree Deakins Nash Smoak & Stewart have joined a $300 million collective action that accuses the labor and employment specialty law firm of operating as a male-dominated hierarchy that puts women at a disadvantage with respect to pay and promotions.

Bulking up a proposed class and collective action initially filed in January in San Francisco, an amended complaint filed May 11 names three new women—all former nonequity shareholders in either Denver or Dallas—who opted into a proposed collective action under the Equal Pay Act. The women join lead plaintiff Dawn Knepper, a former nonequity shareholder in Ogletree Deakins’ Orange County, California, office. Knepper moved in February to Buchalter as a partner.