Houston American Energy Corporation
Houston American Energy Corp (NYSE MKT: HUSA) is an oil and gas exploration and production company focused on properties in the U.S. onshore Gulf Coast Region.

Ring Energy, Inc.
Ring Energy, Inc. (NYSE MKT: REI) is a Texas-based oil and gas exploration, development and production company with current operations in Texas and Kansas.

Geophysical Technology, Inc.
Hunt Oil Company
Hunter Stuart Energy Advisors, Inc.
Marbob Energy Corporation
Monkey Island LNG
NuEnergy Operating
Prairie Rose Resources, LLC
Renovo Oil Company, LLC
Texas Standard Oil LLC
TOPCO Offshore, llc.
TOPCO Offshore, llc.
Upstream Energy Capital, LLC
Vess Oil Corporation
Yankee Creek Oil Company