> There’s even been consolidation among owners of chains. A large number of food options in and around American malls trace back to one private equity firm named for the main character in Ayn Rand’s novel The Fountainhead.

I don’t know why the author avoids naming the firm here, but it’s Roark Capital Group.

https://en.wikipedia.org/wiki/Roark_Capital_Group

> The firm claims that its name is not meant to connote any particular political philosophy but instead signify the firm's admiration for the iconoclastic qualities of independence and self-assurance embodied by the central figure in The Fountainhead.

Well spotted