I dont know, Im a bit confused. I know Loren runs Shop.com but running it doesnt mean owning it ... I also know she has a make up line but it isn't that mass so Im not sure where the money comes from. Maybe from the husband?
I believe they both own their businesses, she's also know for Market America which promotes products across America. For example she introduced Kimora Lee Simmons when she was launching a new clothing line and there was probably 10k people in the audience. All business owners looking for new products to sell. Seems to be v lucrative. They've also done product lines with various celebs La La (Motives), Eva Longoria.
They have the jewellery line (that we always see the Kardashians wearing) and I've got to say some pieces are stunning and totally covetable. Can't remember the name, lorensjewels.com or something