Group 1 Automotive Inc has filed for a mixed shelf offering with Group 1 Realty, Inc. acting as guarantor. The offering may include debt securities, common and preferred stock, warrants, rights, depositary shares, and units. The size of the offering has not been disclosed. The securities may be offered in various transactions, potentially guaranteed by subsidiaries, and sold through underwriters, dealers, agents, or directly to purchasers. The terms will be determined by market conditions.