Ko Jimmy, 53, was a veteran of the 88 Generation Students Group - a Burmese pro-democracy movement known for their activism against the country's military junta in the 1988 student uprisings.
He, alongside his wife, fellow activist Nilar Thein, were considered some of the pioneers of the pro-democracy movement.
When monks led protests against the regime in 2007, Ko Jimmy and his wife mobilised activists and protesters from the 1988 demonstrations to participate.
He served multiple stints in prison for his activism, before being released in 2012.
He was arrested in October last year after being accused of hiding weapons and ammunition at an apartment in Yangon and being an "adviser" to the National Unity Government.
Phyo Zeya Thaw, 41, was a former hip-hop star turned NLD lawmaker.
His band Acid released Myanmar's first ever hip-hop album, with his lyrics carrying thinly-veiled attacks on the military drawing the ire of the junta.
He gradually became a close ally of pro-democracy icon Aung San Suu Kyi, and often accompanied her on her international meetings with world leaders.
He was arrested in November for alleged anti-terror offences.
Phyo Zeya Thaw was a close ally of Aung San Suu Kyi
Both Phyo Zeya Thaw and Ko Jimmy lost their appeals against their sentences in June.
Less is known about the two other activists - Hla Myo Aung and Aung Thura Zaw. They were sentenced to death for killing a woman who was an alleged informer for the junta.