The Andhra Pradesh CID has arrested Gopal Krishna Raju, general manager of SRSR Holding, through which Satyam founder Ramalinga Raju's family held a stake in the IT firm.
Gopal Krishna was arrested on Thursday, police said on Friday.
SRSR Holding is owned by Ramalinga Raju's sibling, Suryanarayana, whose house was also searched by the police with regard to the Rs 7,800 crore (78 billion) accounting fraud in Satyam.
The family of B Ramalinga Raju, who resigned as Satyam chairman after the shocking disclosure of falsifying profits, had held 8.27 per cent stake in Satyam through SRSR Holdings at the end of September quarter.
But the stake had fallen to 2.34 per cent as of January 8 following the share sale by lenders, with whom all the promoter's equity had been pledged.