Founder and chairman, Icahn Enterprises; activist investor since the 1970s
He defined modern shareholder activism and his open letters are primary documents, but he has published no book.
5 biographies about them · 113 letters
Only one dedicated biography exists, now thirty years old; the takeover histories cover him better than any recent book.
carlicahn.com/letters runs to ten paginated pages holding 118 open letters, statements and presentations from October 2013 (the first Tim Cook letter on Apple) to December 2023 (Illumina), each with its own permalink. Icahn's older and continuing letters to boards are also filed as exhibits to Schedule 13D and 13D/A amendments on SEC EDGAR under the filer 'Icahn Carl C' (CIK 0000921669) and under Icahn Enterprises L.P. (CIK 0000813762) - typically as EX-99 letters attached to Item 4 amendments - and reach back to the 1980s.