how does perry own so much of journey without working?

how does perry own so much of journey without working? sorry i don't know much about this.did he enter some kind of agreement with them where he takes a percentage even if he is not with the band? i bet if he did this something tells me it would've occured in the raised on radio era of the band.
maybe something to the affect of.....'i'm only going to record again if i get a bigger piece of the pie or a certain percentage for life' kind of deal.kind of like what axl rose did to guns n roses before they were due to go on a tour. he held the band hostage to his demands.the members needed the revenue so they caved in and signed over the rights to rose.i think this happen in '89 or '90 right before use your illusions.i'm wondering did perry do something similar?
maybe something to the affect of.....'i'm only going to record again if i get a bigger piece of the pie or a certain percentage for life' kind of deal.kind of like what axl rose did to guns n roses before they were due to go on a tour. he held the band hostage to his demands.the members needed the revenue so they caved in and signed over the rights to rose.i think this happen in '89 or '90 right before use your illusions.i'm wondering did perry do something similar?