While mondragon is a great example of a "scaled" cooperative. There are other (somewhat smaller, but still meaningful) examples. Take Cooperative Home Care Associates (http://www.chcany.org) around 1500 homecare workers in NYC, or the Arizmendi bakeries https://www.arizmendi.coop/ that have 5 bakeries and other businesses all growing and providing living wage jobs in the Bay Area.

We chose to use a holding company model for our cooperative https://www.staffing.coop so that we could have many startups and conversions underneath one holding company worker cooperative.