Mondragon Corporation
From the article:    At Mondragon, there are agreed-upon wage ratios
    between executive work and field or factory work
    which earns a minimum wage. These ratios range
    from 3:1 to 9:1 in different cooperatives and
    average 5:1. That is, the general manager of an
    average Mondragon cooperative earns no more than
    5 times as much as the theoretical minimum wage
    paid in their cooperative. For most workers, this
    ratio is smaller because there are few Mondragon
    worker-owners that earn minimum wages, because
    most jobs are somewhat specialized and are
    classified at higher wage levels. The wage ratio
    of a cooperative is decided periodically by its
    worker-owners through a democratic vote.

Afaik this is the biggest worker coop in existence. Does anyone know of any sizable examples of this ownership-model in tech?edit: added "worker" to "coop" (as I'm not interested in non-worker coops)