Private equity firms Blackstone Group LP, Stonepeak Partners LP and EQT Partners AB, as well as affiliates of Brookfield Asset Management Inc., have all moved to the next bidding round for railroad operator Genesee & Wyoming Inc., Bloomberg News reported, citing people with knowledge of the matter.

Genesee & Wyoming reportedly is looking for an offer of $110 per share or more, which would put the company's equity valuation at approximately $6.2 billion, based on data compiled by Bloomberg.

The people told the news outlet that some of the suitors may join forces, while others are seeking potential co-investors, including sovereign wealth funds and pension funds.

Blackstone, Stonepeak, EQT and Brookfield representatives did not comment on the matter, and Genesee & Wyoming representatives did not respond to requests for comment, according to Bloomberg.