I've always wondered how the commission splits work with the big commercial brokerages such as Colliers,CB Richard Ellis,etc... These guys seem to work in teams and work with large international companies helping them buy and sell their properties. On a team, you see a "VP", an "office specialist", a "land specialist", etc... these big international commercial brokerages seem to pay for all signs, advertising, etc.. and their clients seem to have been their clients for a long time, but you see a bunch of smart young college grads as their agents.
Someone once told me that you get a 50/50 split, but that's all I know...not sure how that works if the client has been with the brokerage for a long time.

Anyone know how this all works?

Varies by brokerage.A friend used to make 50k a year salary and they took 70 percent of his commission so he eventually went on his own.The good part is most commercial brokerages train really well and provide leads.

My company splits the commissions all evenly. However many various agents/brokers are involved (or even think they are involved), it gets split further. Keeps everyone happy. No one complains that someone gets "more".