You might find it actually still belongs to Northrop Grumman
Turn the clock back through the various corporate mergers to 1994. Ownership of LTV was 49% Northrop 51% Carlyle Group. 1994 Northrop bought out Carlyle. Northrop then merged with Grumman.
The question then becomes one of exactly what NG sold to Carlyle Group in 2000 to form Vought Industries Inc, that via various other restructurings is Triumph Aerostructures today. Wiki says "the remainder" of NG whatever that means. But Vought Industries Inc and Triumph are involved in aerostructures only.
Just because a company uses a name doesn't necessarily mean it owns it. Salutary tale from the past.
Rolls Royce Motors, (car company) in 1998. Owned by Vickers from 1971 when the original RR had gone bust over the RB211 engine and was split up. Vickers wanted to sell. The most likely candidate was BMW with whom there was a trading relationship as the engine supplier. But VW outbid them. Then the fun began.
VW quickly found out that the vital RR trademarks, logos, etc didn't belong to RR Motors or Vickers. They were only licensed to use them by the owners. The owners were RR Holdings, the aero engine company formed in 1971 out of the old bust RR. It already had a relationship with BMW which it didn't want to upset. Vickers though did own the radiator grill shape and Spirit of Ecstacy.
Long story short, RR Aero engine did deal with BMW over trademarks etc and a BMW subsidiary now designs and builds RR badged cars in a brand new factory. VW got the factory etc at Crewe from Vickers and an agreement to build RR badged cars for 5 years. It now builds cars at Crewe using the Bentley badge. VW and BMW did a deal over the radiator and Spirit of Ecstacy.
Moral of the tale, the intellectual property rights, like trademarks, are separate from the company itself and don't always lie where you think they might. And the lawyers make money all round!