John Gannon Derfus Mineral Rights

• MineralHolders.com strives to provide a comprehensive database of mineral holders and their interests across the state of Texas.
  
  Our data is currently based on the 2026 mineral roll, and we provide coverage of roughly 99% of the producing properties in the state. We cover 215 counties, which is roughly 99% of the producing counties in Texas.

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Interesting Statistics

• 99% Coverage of all Texas Producing Properties
• 959K Mineral Owners in our Database
• 180K Total Appraised Properties
• $187B Total Value of Appraised Properties
• $7.8K Average Royalty Interest Value

MineralHolders.com obtains all relevant mineral royalty information and appraisal values from the respective county appraisal district. While we are constantly updating and improving our datasets and product, we do not guarantee that the results and coverage provided are 100% complete and up to date. Before making any financial decision based upon information found on our website, please consult an expert to verify any findings from MineralHolders.com. MineralHolders.com is constantly growing in royalty ownership data and coverage. Please notify MineralHolders.com immediately if any inaccuracies are discovered.