Lyndal Stephens Greth

Lyndal Stephens Greth (born 1975) is a Texas-based energy billionaire with an estimated net worth of ~$27.4B. SEC filings link her to Diamondback Energy, Inc. (ticker: FANG) and several related entities and trusts, including Autry Stephens Management Trust and Stephens Family Trust entities. Her SEC insider filing history includes Forms 3 and 4 and Schedule 13D filings tied to Diamondback Energy. Wikidata SEC EDGAR

Business & SEC Activity

SEC EDGAR records associate Greth with Diamondback Energy, Inc. (FANG) and entities including Autry Stephens Management Trust, Endeavor Manager, LLC, Stephens Family Trust, and Stephens Family Trust #2. Her recent filings include Form 3 (an initial statement of beneficial ownership), multiple Form 4 filings (reports of changes in insider ownership), and Schedule 13D/13D-A filings (used to report significant ownership stakes and related changes). Recent insider-related filings are dated 2024-09-13 (Form 3 and SC 13D), 2024-09-24 (Form 4 and SC 13D/A), and Form 4 filings on 2025-12-02, 2026-02-05, and 2026-03-05. SEC EDGAR

Philanthropy

ProPublica 990 data lists the Stephens Greth Family Foundation Inc (Midland, TX) with $0 reported for assets, revenue, expenses, and grants paid in the available record. It also lists the Everett W Erdoesy And Gretha M Erdoesy Foundation (Sarasota, FL) for tax year 2024 with total assets of $1,307,831, total revenue of $56,436, total expenses of $173,138, and $0 grants paid. Across the listed foundations, total grants paid are $0 and total foundation assets are $1,307,831. ProPublica 990