Private-equity firm Thomas H. Lee Partners (THL) is said to be considering to buying the US operations of Yahoo, unlike other bidders that are looking at either a minority stake or being part of a consortium along with the internet company’s partners in Asia, according to sources familiar with the matter.

Yahoo’s US business is reportedly worth around $5bn to $6bn.

The Boston-based equity firm already owns assets of Dunkin’ Brands Group, Clear Channel Communications, Univision, among others.

Meanwhile, Microsoft is reportedly helping Silver Lake to buy a minority stake in Yahoo, while Blackstone Group, Bain Capital and Hellman & Friedman are trying to team up with China’s Alibaba Group and Japan’s Softbank Corp.

Sunnyvale, California based-Yahoo has been exploring strategic options after firing its CEO Carol Bartz.

THL spokeswoman Robin Weinberg has declined to comment on this matter.