Jensen Huang, Nvidia’s former CEO, was reported to have concealed his affair with Chinese businesswoman Alice Huang from company executives.

According to Odaily, Reuters reviewed internal communications in which Huang described his interactions with Alice Huang as normal customer business and his contact with Megaspeed International as routine commercial activity when executives asked him about them in October. The executives included General Counsel Tim Teter and Chief Marketing Officer Alison Wagonfeld. People familiar with the matter said Huang had previously explained the relationship to some executives but did not acknowledge an affair.

Huang resigned as CEO on November 12 after publicly admitting he had been unfaithful to his wife and apologizing to the company, the report said. Nvidia’s independent directors have hired a law firm to conduct an independent investigation. The company’s shares have fallen more than 30% from their October 6 closing high, while its market value has declined by more than $1.8 trillion.