At least 438 suspects were remanded into custody over their links to Fetullah Terrorist Organization (FETO), the group behind the 2016 coup bid in Turkey.
Earlier, the court had issued arrests warrants for 928 suspects.
In the past eight months, 847 suspects were the arrested in six separate operations.
Of them, 145 suspects were released under the remorse law and 241 under judicial review measures.
Moreover, 23 suspects were released due to their health condition.
Security forces are on the lookout for 81 more suspects.
FETO and its U.S.-based leader Fetullah Gulen orchestrated the defeated coup on July 15, 2016, which left 251 people martyred and nearly 2,200 injured.
Ankara also accuses FETO of being behind a long-running campaign to overthrow the state through the infiltration of Turkish institutions, particularly the military, police, and judiciary.
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