The men were convicted in a mass terrorism trial, a case that activists have decried and that UN human rights experts had expressed concerns over.
The mass sentencing was "the largest single incident" since the government began stripping opponents of their citizenship rights in 2012, a rights group said.
Hakeem Al Araibi, 25, who fled Bahrain in 2014 and received refugee status in Australia, was arrested in November at a Bangkok airport while on a honeymoon trip following an Interpol notice issued at Bahrain's request.
Thailand is between a rock and a hard place trying to pick who it is more willing to upset; Bahrain and the GCC or Australia, human rights organisations, and football's governing bodies.
Opposition to Bahrain's monarchy has set up shop in Iraq and criticism within Iraq of Bahrain's crackdown on dissidents hasn't gone down well in Manama. The perceived interference in Bahraini affairs could set Iraq on a collision course with the GCC.
Bahrain's appeals court sentences Sheikh Ali Salman, who headed the now-outlawed Al Wefaq movement, over charges of spying for rival Gulf state Qatar, a verdict Amnesty International calls "a travesty of justice."
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