When my wife left her job several years ago (but post Obamacare) and needed to get insurance on the open market, her Northern California Kaiser plan was roughly the same price as her employee group plan (inclusive of employer contribution). Not too long ago my sister purchased a Kaiser Mid-Atlantic plan on the open market, which was also reasonable with nearly identical coverage to the group plans I've had.

As far I understand, Kaiser is largely an outlier regarding rough cost parity between group plans and individual plans. I'd be surprised if UHC cost the same as Kaiser for the same coverage on the open market, but if you confirm then I'll have to update my assumptions.