Living with the Enemy
(2005)

Phillip Lauder is unaware of the Cobalt assassination conspiracy in fact Houston Edwards is behind all the deaths (like F.B.I Agent Cheryl Cummings) including the kidnap and murder of Phillip's previous wife because she linked all the deaths back to him. All so Cobalt could keep thriving for the benefit of all the employees and stock holders (yes this is a similar plot line to Anti-Trust).

Houston's hit-men arrange to torch Phillip & Allison along with their bodyguard (plus one of said hit-men who'd been fatally shot by Phillip) in a fire but Allison & Phillip break free and manage to escape just as surviving assassin ignites the fumes with a muzzle flare from his gun. On seeing both still alive having brought the police with them Houston shoots himself.

Thanks Sarriesleepers!