There is one very interesting example at a fairly large scale, the John Lewis Partnership which runs very successful major department store and food store chains in the UK. This is a real partnership, owned by the permanent staff (no public shareholders), with a written constitution which sets out how the management operates and how the employee-partners participate and share the profits.

A FAQ about the organization with copy of its constitution is online:

http://www.johnlewispartnership.co.uk/Display.aspx?MasterId=...