Is a SIP only suitable for large or listed companies?

No.  The SIP is popular with listed companies, but we advise on and administer many for private companies of all sizes, across all sectors. There is no minimum company size – you can start small and grow the scheme as the business expands.

A SIP can be particularly valuable to a private company, because as well as incentivising all employees it can help create a market for shares when people leave.