MediaWorks received at least two complaints of alleged sexual assault as part of its investigation into worker misconduct, the Herald understands.
A source at the company also claimed dozens of complaints of harassment, bullying and inappropriate behaviour had emerged within a single part of the organisation during the inquiry.
MediaWorks will today release the findings of a QC-led inquiry into workplace behaviour at the company - three days later than originally expected. It's been reported the board had "asked for more time to process the findings and recommendations" of that report.
MediaWorks announced in March it had launched an internal investigation after allegations of sexual harassment within the business emerged on social media.
An external inquiry, run by Maria Dew QC, was announced less than a week later, running in parallel to the company's internal investigation.
Dew was to review any evidence and probe allegations of sexual and racial discrimination, sexual harassment, bullying and any misuse of drugs or alcohol at the organisation, which owns radio stations and also ran TV3 before its sale last year.
The Dew inquiry, which looked into allegations spanning back three years, also examined how the company handled and investigated complaints from staff members, the Herald understands.
MediaWorks had not referred the sexual assault allegations to the police, the source said.
Police declined to comment when asked last month about any complaints they may have received relating to MediaWorks.