The world's largest Co-Op?

What does "Co-Op" means in this context? Because if it was under ordinary Co-Op, I am pretty sure there are a few Co-Op larger than Mondragon.

> "In 2021, the network brought in more than eleven billion euros in revenue"

€11B, or roughly $11B USD in revenue. There are quite a few large Co-Op in Japan unknown to the West, which is similar or an order of magnitude larger. But outside of that, even the well known ones from New Zealand such as Fonterra, I guess everyone should at least have heard of the butter brand Anchor, comes in at 20.57 billion NZD revenue, or ~$12.5B USD.

So what makes Mondragon the largest Co-Op in the world? By Profits? By Headcounts? or By Asset?