What does"at those that did"mean in the following sentence?Does"those"mean"companies"?
Most private companies, meanwhile, ignored their obligation to provide pensions for their workers. At those that did, allegations of mismanagement and fraud abounded.

Question

Answer

Yes - you're right. The use of "at" is a little unusual, which may have made it harder for you to have been sure of the meaning. "among" would have been better, in my view.