Billionaire Profile

Global Rank

#77

Image: Public domain | via Wikimedia Commons

Lyndal Stephens Greth & family

CEO, Diamondback Energy

Real-Time Net Worth

$27.4B

As of December 2025

Age

Source

Oil & gas

Industry

energy

Citizenship

Biography

Lyndal Stephens Greth, a prominent figure in the U.S. oil and gas sector, currently chairs the board of Diamondback Energy, which acquired Endeavor Energy Resources in 2024. Her net worth is estimated at $27.4 billion as of December 2025. Greth's wealth stems from her family's involvement in the oil and gas industry, particularly through Endeavor Energy Resources, founded by her father, Autry Stephens. After her father's passing in August 2024, she assumed leadership, overseeing the company's sale to Diamondback Energy. Her career highlights include a law degree and key roles in the strategic development of Endeavor Energy, cementing her position as a major player in the energy sector.

Wealth Over Time

Portfolio Holdings

Diamondback Energy

In-Depth Profile

Early Life

Lyndal Stephens Greth was born on October 12, 1974, in Midland, Texas. She is the daughter of Autry Stephens, the founder of Endeavor Energy Resources. Her upbringing in a family deeply rooted in the oil industry provided her with an early understanding of the business.

Rise to Success

Greth initially pursued a career in law, earning a Juris Doctor degree from Baylor Law School and a Bachelor's degree from Southern Methodist University. She later joined Endeavor Energy Resources, contributing her legal and strategic expertise to the company. Greth became a member of the Board of Managers in 2013, working closely with her father on company strategy.

Key Business Strategies

A pivotal moment in Greth's career was her leadership following her father's death in August 2024. She oversaw the sale of Endeavor Energy Resources to Diamondback Energy for approximately $26 billion in stock and cash. At the time of the sale, Endeavor was one of the largest privately-owned oil producers in the country, producing around 327,000 barrels of oil equivalent per day. The company had rights to drill on more than 500,000 acres in Texas.

Philanthropy

While specific philanthropy amounts are unavailable, the family is actively involved in charitable initiatives.

Career Milestones

1979

Endeavor Energy Resources Founded

Her father, Autry Stephens, founded Endeavor Energy Resources.

2013

Board of Managers

Became a member of the Board of Managers for Endeavor Energy Resources.

2024

Chairman of the Board

Assumed the role of Chairwoman of Endeavor Energy Resources after the death of her father. Oversaw the sale of Endeavor to Diamondback Energy.

Philanthropy & Social Impact

General Philanthropy

Undisclosed

The family is involved in charitable initiatives.