The rise of billionaire Len Blavatnik, one of Wall Street's greatest dealmakers

Last month, Business Insider published a list of the richest people on earth. Ukraine-born American investor Leonard Blavatnik came in at No. 42 with a net worth of $16.7 billion.

The self-made billionaire's wealth has ballooned in recent years thanks to his privately held industrial group, Access Industries, which has major global investments in chemicals, real estate, and entertainment.

Blavatnik is perhaps best known for his legendary investment in chemical company LyondellBasell, but since buying Warner Music Group in 2011, he's become a force in Hollywood, too.

Here's a look at how Blavatnik became one of the world's most vaunted dealmakers.