Poetsch is VW chairman and Mueller is VW Group CEO
Poetsch reaffirmed at Porsche SE’s annual meeting on Tuesday that the company considers the allegations unfounded.
A Porsche SE spokesman said: “We have nothing to hide,” adding that there were no indications to suggest prosecutors were planning to search the company’s offices.
Poetsch, Mueller and former Porsche SE CEO Martin Winterkorn are under investigation following a criminal complaint lodged in the summer 2016 by German securities regulator BaFin.
Two other top Porsche SE executives, Manfred Doess and Philipp von Hagen, are excluded from the investigation since neither serve on the VW Group board.
Major automakers including General Motors, Daimler and Fiat Chrysler Automobiles have been hit by allegations recently that their diesel vehicles had illegal software to circumvent clean air regulations limiting nitrogen oxide emissions.
Last Tuesday, Daimler shares came under heavy pressure after the company confirmed investigators had searched various offices across Germany in connection with an investigation.