The bankrupt Upper Crust pizza chain was sliced up at auction Wednesday, as a private equity firm with ties to ousted founder Jordan Tobins won leases for four restaurants, while an attorney who filed a class-action lawsuit against Tobins and the company for allegedly exploiting workers purchased the Harvard Square location.

Shannon Liss-Riordan, who sued Upper Crust in 2010 on behalf of immigrant employees who claim the business took advantage of workers and seized back wages from them, said she plans to give employees ownership shares in the restaurant. She partnered with another investor, Haluk Ozek, who owns Monella Boutique in Harvard Square, to buy the Cambridge lease and equipment and they are considering naming the restaurant “The Just Crust.”