| Name | Title | Contact Details |
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WDC Exploration & Wells is a Montclair, CA-based company in the Energy & Utilities sector.
Geophysical Development Corporation is a Houston, TX-based company in the Energy and Utilities sector.
Production Enhancement Group, Inc., a Houston-based energy services company incorporated in Alberta, Canada, rades on the TSX under the symbol WIS.
Dorchester Minerals, L.P. is a Dallas based owner of producing and non-producing crude oil and natural gas mineral, royalty, overriding royalty, net profits, and leasehold interests and its common units trade on the NASDAQ Global Select Market under the symbol DMLP.