Editing Steven Rattner (section)

==Private equity career==
In March 2000, Rattner and three Lazard partners, including [[Joshua Steiner]], left the firm and founded the [[Quadrangle Group]]. They initially focused on investing a $1 billion media-focused [[private equity fund]].<ref>[https://www.nytimes.com/2000/03/01/business/4-top-lazard-freres-bankers-are-quitting-to-open-firm.html Patrick McGeehan, "4 Top Lazard Freres Bankers Are Quitting to Open Firm"] {{Webarchive|url=https://web.archive.org/web/20180815155954/https://www.nytimes.com/2000/03/01/business/4-top-lazard-freres-bankers-are-quitting-to-open-firm.html |date=August 15, 2018 }}, ''The New York Times'', March 1, 2001.</ref> Early investors in Quadrangle included Sulzberger, and [[Mort Zuckerman]]. Headquartered in the [[Seagram Building]], Quadrangle grew to manage more than $6 billion across several business lines, including [[private equity]], [[distressed securities]], and [[hedge fund]]s. The firm also hosted an annual gathering for media executives called Foursquare, where speakers included [[Rupert Murdoch]] and [[Mark Zuckerberg]]. In 2008, the firm's asset management division was selected to invest the personal and philanthropic assets of New York Mayor [[Michael Bloomberg]], Rattner's close friend.<ref name="NYT0108">[https://www.nytimes.com/2008/01/16/nyregion/16conflict.html "Bloomberg Chooses a Friend to Manage His Fortune"], [[Andrew Ross Sorkin]] {{Webarchive|url=https://web.archive.org/web/20161220103854/http://www.nytimes.com/2008/01/16/nyregion/16conflict.html |date=December 20, 2016 }},  ''The New York Times'', January 16, 2008;  Retrieved 2-23-09.</ref>

Throughout his business career, Rattner has served on several corporate boards, including [[Cablevision]], [[IAC/InterActiveCorp]], and [[Protection One]].