Lyndal Stephens Greth inherited the Endeavor Energy fortune and oversaw the family's transition into a major Diamondback Energy shareholding after the $26 billion merger closed in 2024. [1][2]
From Endeavor Energy to Diamondback
Greth is the daughter of Endeavor Energy founder Autry Stephens. Forbes says she joined Endeavor's board in 2013 and became chair after her father's death in August 2024, during the final weeks before the company's agreed sale to Diamondback Energy. [1]
Diamondback announced that it closed the Endeavor merger on September 10, 2024. The transaction converted the family's private oil-and-gas business into cash plus a very large public-company equity position, changing the form of the wealth without erasing its roots in Endeavor. [2][1]
A large public equity position after the sale
A Diamondback filing connected with the transaction identifies Greth within the selling group and reports a large block of Diamondback shares held through affiliated entities. Because the shares are held across related entities with shared beneficial ownership, the filing does not by itself establish Greth's personal economic share. [2]
Sources for background
Sources reviewed Sep 8, 2026.
- Lyndal Stephens Greth & family · Forbes · Mar 10, 2026
- Diamondback Energy, Inc. Closes Merger with Endeavor Energy Resources, L.P. · Diamondback Energy · Sep 10, 2024
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