Here's the list of the 100 largest privately held companies in the Cincinnati region
The Enquirer

For 38 years, The Enquirer has published a list of the largest privately held companies based in the Cincinnati region. Together, they have combined revenues of $43.9 billion and just under 119,000 employees.
Here is the 2021 Deloitte Cincinnati 100 list, ranked in order by 2020 revenues.
Deloitte Cincinnati 100:Stalwarts and newcomers to the list
Deloitte Cincinnati 100:Outlook's bright according to Cincinnati’s top private companies