Fifteen employees have been put on leave in Portugal, France and the United States since news broke about the probe, which is currently limited to Portugal, said Drahi.
Pressed by analysts on the call to lay out the role and extent of Pereira's involvement within the Altice group, Drahi said Pereira, whom he hired in 2003, had not held any stake in any Altice entity since 2005.
Altice International, the entity that owns telecoms firm PT Portugal, is owned by Drahi's personal holding Next.
The other two entities are Altice USA and Altice France, home to France's second biggest telecoms firm SFR.
The debt has come under further pressure since Pereira's July detention, with longer-term debt issued by Altice France trading around 80 cents to the euro while those of Altice France Holding trade around 40 cents to the euro.
Persons:
Patrick Drahi, Violeta Santos Moura, Drahi, Armando Pereira, Pereira, Altice, Mathieu Rosemain, Yoruk Bahceli, Ingrid Melander, Silvia Aloisi, Conor Humphries
Organizations:
French, REUTERS, Altice, PT Portugal, Altice International, Thomson
Locations:
Paris, France, Portugal, United States, Altice France