SSD Concerts called the claims made against them online "malicious", but said they were taking them "seriously".
Northumbria Police told the BBC that no reports had been submitted to them.
However officers did arrest and caution a man for hacking into the company's social media account earlier this week.
The largely anonymous allegations, which also include the use of "offensive" language, staff being made to feel "uncomfortable" and "underpaying" workers, were shared via the business reviews section of the jobs website Glassdoor.
