Complex sentence: He also announced the formation of a super PAC pledging $150 million to push for corporate tax reform, in particular of inversions, which occur when corporations leave the U.S. to take advantage of lower tax rates elsewhere.
Split into simpler sentences: He also announced the formation of a super PAC pledging $150 million to push for corporate tax reform. Icahn will target inversions, which occur when corporations leave the U.S. to take advantage of lower tax rates elsewhere.