Haddington Ventures LLC, a Delaware limited liability company, is a Houston-based private equity firm that is registered as an investment adviser with the U.S. Securities and Exchange Commission. Haddington specializes in control-oriented investments in the midstream energy and infrastructure space. Haddington has raised and invested four funds since its formation in 1998 with aggregate commitments of $680 million plus $853 million of co-invest and third party capital.