York began his working days as a financial analyst for Guggenheim Partners at their New York City offices.

The investigation was based around Milken allegedly providing investment advice through Guggenheim Partners.

In 2000, he helped found Guggenheim Partners, LLC.

In February 2013, Fortune Magazine which is owned by Time Warner did an investigation into the Guggenheim Partners.

Later in the article they said that since the Guggenheim Partners managed so many billions in assets, that they are almost like a private equity firm.

Alan D. Schwartz is executive chairman of Guggenheim Partners, an investment banking firm based in Chicago and New York.

While Magic Johnson is considered the leader of the ownership group, the controlling owner is Mark Walter, chief executive officer for Guggenheim Partners.

In May 2009 Guggenheim Partners acquired Transparent Value.

However, one family investment company, Guggenheim Partners, today manages over $100 billion in assets.

In addition to his personal investments, he was an investor with the Guggenheim Partners.