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Marketplace had a decent episode that covered it:

https://www.marketplace.org/shows/marketplace/there-are-6000...

Mondragon [0] is often seen as the most successful large scale cooperative. Don't know if that was exactly what you were asking for though.

[0] https://en.wikipedia.org/wiki/Mondragon_Corporation

Mondragón id also not free from problems pinned on the neoliberal school of management, such as bankruptcies that shut down whole factories leaving workers out to dry.

https://www.theguardian.com/social-enterprise-network/2013/n...

Also John Lewis & Partners in the UK with 38,000 staff.

https://en.wikipedia.org/wiki/John_Lewis_%26_Partners

it's usually called a cooperative (and a lot of farms operate this way).

That's a producer coop, a worker coop is what your thinking of part of KFC is a producer coop BTW