 NEW YORK--BUSINESS WIRE--Halper Sadeh LLP, a global investor rights law firm, is investigating whether HollyFrontier Corporation NYSE: HFC and Holly Energy Partners, L.P.s acquisition of Sinclair Oil Corporation and Sinclair Transportation Company is fair to HollyFrontier shareholders. As part of the transaction, HollyFrontier will form a new parent company, named HF Sinclair Corporation HF Sinclair, which will replace HollyFrontier as the public company trading on the NYSE. At the c 