Independent investment bank Perella Weinberg Partners and Citigroup will share in as much as $85 million in fees for advising on the deal, according to Jeffrey Nassof, director of consulting firm Freeman & Co.
Northrop will pay Perella Weinberg an estimated $30 million to $40 million, according to Nassof.
Citigroup will make an estimated $35 million to $45 million for advising Orbital, which generates $4.5 billion in revenue thanks to lucrative contracts with NASA and the Army.
The deal is expected to close in the first half of 2018 and will create a company on pace for a combined $30 billion in sales in 2017.