Forbes Koch Industries over $100 billion in 2013 Koch Industries Koch Industries Koch Industries Koch Industries $115 billion Koch Industries Koch Industries Forbes $115 billion $115 billion $115 billion $115 billion $115 billion Koch Industries $115 billion $115 billion $115 billion Koch Industries $115 billion $115 billion $115 billion $115 billion $115 billion $115 billion ranked by Forbes Forbes Koch Brothers Forbes Koch Industries $115 billion company Koch Industries $115 billion Koch Industries Koch Industries ranks $115 billion Forbes Forbes $115 billion Forbes $115 billion Forbes