A view of the High Court of Justice in Cairo, Egypt (Reuters)
The ruling was issued after the country's top Muslim legal authority consented to the punishment. In July, the court referred preliminary death sentences against the defendants to the grand mufti, whose opinion is legally required in death penalty cases but is not binding.
The prosecution charged the defendants with leading Al-Qaeda-aligned Al-Mourabitoun group along with Ashmawy and financing a terrorist organisation with arms, ammunition, and explosives.
Kishk, who was arrested in Libya and extradited to Egypt, was considered the right-hand man of Ashmawy, who was also captured in the eastern Libyan city of Derna in late 2018.
Ashmawy, described as the country's most dangerous terrorist, was handed over to Egypt by forces loyal to Commander Khalifa Haftar in May 2019.
Ashmawy was handed two death sentences after being convicted of orchestrating several deadly high-profile attacks against security forces. He was executed by hanging in March 2020.
Monday's verdict is not final and can be appealed.