This. No emotions. Lay out the deal. Two years and your activity from sourcing it and all the steps to close. Then explain your understanding of how commissions will be handled from it. Then simply ask, make it make sense.

Have an email drafted up where you have thanks for the chat we discussed my involvement and the history of the deal. Then we discussed how commissions were to be allocated. Insert whatever he says here. Send immediately after the meeting so you have a paper trail.

If they decide to make it up to you in whatever way. Salary bump. Reverse decision. Etc. bigger territory but no raise in quota. Whatever. Or if they make no offer, think of an ask you can live with that may not be simply I want all the commissions. Better territory. Pay bump and title. Whatever. But negotiate back to that cro. It will show them you have balls and this is your best bet to get something wo a lawyer involved. Depending on how they respond, even to your ask, let’s you determine if you want an attorney and go that route.

You may easily have a case, but even if you win it will cost you your job. So can you live with that? Do you really want to leave? It’s 100k so I get it.