Roger Penske is on the borderline of what Forbes magazine says is needed to make it to its annual list of the 400 richest individuals in the United States.
Near the bottom of the Forbes 400 last year was Jerry Jones, an Arkansas oil and gas man who owns the Dallas Cowboys. His estimated value: $700 million. Entertainer Oprah Winfrey was in the same ballpark at $725 million, according to Forbes. Penske is right there.
'He is always one of our contenders, one of the people we look at pretty heavily, but he's never made it,' said Peter Newcomb, Forbes senior editor.
Because so much of Penske's holdings are held privately or diluted by other partners, an accurate portrait of his wealth is tough to create - but we'll give it a shot.
Our best estimate: Between $625 million and $715 million. Here's our math:
Detroit Diesel Corp. holdings: $122 million.
Owns 121,750 shares individually and 57 percent of 11.24 million shares owned by Penske Corp. Has options for 88,750 more. Detroit Diesel closed at $18.50 on Jan. 7.
Holdings in International Speedway Corp.: $158.6 million.
Owns 25,042 shares individually, 57 percent of 4.575 million shares owned by Penske Corp. ISC shares closed at $49.88 on Jan. 7.
Stake in UnitedAuto Group Inc.: $10.12 million.
Owns approximately 1.394 million shares through Penske Corp.'s ownership stake in Penske Capital Partners. UAG shares closed at $9.19 on Jan. 7.
Penske Automotive Group: $170 million to $230 million.
Value is a range assessed by a valuation analyst of a major accounting firm in Detroit based on Penske's 57 percent stake in Penske Corp., which owns the group.
Penske Truck Leasing Co.: $167 million to $192 million.
Penske Corp. holds 21 percent, GE Capital Corp. the rest. The stated range is the valuation analyst's assessment of Roger Penske's share.
Also included is Penske's ownership of Delphi Automotive Systems Corp. and General Electric stock.
Real estate, various salaries and other personal holdings.