At the moment, you can only open one account per company and sub accounts do not exist.
If you'd like to open a new account for a separate company, follow this link.
What is a sub account?
Sub accounts are accounts within your main Holvi account. They can be used for separating funds – e.g. for taxes, savings or other purposes.
Sometimes companies need these for taxation purposes or other reasons. They're also nice to have, so we'll develop this feature as soon as possible.