I know and understand S Corps.  That's primarily what I use for my clients. 

The Partnerships I have in some cases own interests in other Partnerships.

The is the first time i've had an S Corp owning a Partnership and I just instinctively became worried about  the SE taxes.  

So you're saying it doesn't matter that most of the income comes from partnerships on their K-1, Box 14, Code A?

all the partnership self-employed income shown on the K-1 passes into the S Corp and then is just treated as ordinary income with no SE implications?