Those taken into custody include over 40 bank employees and 45 businesspeople. Two top executives of the construction firm were also among those arrested, Anadolu Agency wrote.
"Our board members were called to give a statement at the Financial Crimes Department on Monday morning," Dumankaya confirmed in a statement.
Detainees are suspected of funding what Turkish prosecutors call a "terror organization" headed by the US-based Muslim cleric. Those arrested reportedly gave $17.5 million to Gulen’s group from 2004 to 2015.
They have been also charged with spreading terrorist propaganda.
Authorities claimed that Gulen is behind the so-called Fethullah Terrorist Organization, and is hatching a plan to oust Erdogan. Gulen, exiled from Turkey in 1999, has repeatedly denied the existence of the group.
Gulen was Erdogan’s ally for many years until 2013, when a high-profile corruption scandal occurred.
Since that time, Erdogan has waged war against Gulen and his supporters. Over 2,300 people have been put in custody in connection to the movement since 2014.