The CEO of Spanish drugmaker Grifols said Thursday that there is room to improve the company's communication and governance, but that a negative report by Gotham City Research questioning its accounting was "absolutely wrong."

Thomas Glanzmann told a conference call with investors that the bearish fund was only seeking financial gain and acting out of self-interest, and that, in order to suggest irregularities, it used information that had already been reviewed and approved by regulators and an auditor.

(Reporting by Joan Faus; writing by Andrei Khalip; editing by Aislinn Laing; Spanish editing by Javi West Larrañaga)