Two leading activists from the Occupy movement, Lee Wing-tat and Eason Chung, have filed appeals against their convictions linked to the huge pro-democracy protests in 2014
The Department of Justice said it was informed about their decisions on Tuesday and Thursday respectively.
This means all eight defendants sentenced in the case have lodged an appeal.
Lee and Chung, as well as a co-founder of the movement, Reverend Chu Yiu-ming, received suspended jail terms for their public nuisance convictions, while student leader Tommy Cheung was given community service.
Two other co-founders Benny Tai and Chan Kin-man, legislator Shiu Ka-chun and League of Social Democrats activist Raphael Wong were jailed for between eight and 16 months.
The government earlier said it would not appeal against the sentences, which were handed down last month, because there was not enough of a legal basis to suggest they were wrong in principle or clearly not harsh enough.
A ninth defendant, lawmaker Tanya Chan, is expected to be sentenced on June 10. She had asked for an adjournment so she could have surgery on a brain tumour.