Post Oak Energy Capital

Tiburon Oil & Gas was formed to pursue upstream development and is currently focused on "Lease and Drill" in the Utica Shale Basin.

Ichthys Energy is an upstream oil and gas firm that focuses on aggregating and prudently developing its operated Permian Basin inventory.

Midway Energy Partners is an oil and gas operating company focused on the development of oil and gas properties.

Layne Water Midstream (“LWM”) is a full cycle water midstream business providing upstream oil and gas companies with water sourcing, disposal and recycling infrastructure and services in the Delaware and Midland Basins. Anchored by exclusive long-term contracts with key customers, landowners, the State of Texas General Land Office and the State of Texas University Lands organization, LWM operates significant source water, water transportation and produced water management infrastructure and is committed to further growth to support its upstream customers in the Delaware and Midland Basins.

Prime Downhole Manufacturing, LLC is an engineering company based in Houston, Texas, specializing in precision machining and fabrication for the oil, gas, and aerospace industries. Established in 2015, the company manufactures a range of products, including Torstar breakout machines, bucking units, bearings, PDC bits, and reamers. Additionally, Prime Downhole Manufacturing provides machine maintenance and calibration programs, offering both in-house and field repair services. By delivering contract machining and project management solutions, the company supports upstream oil and gas operations, helping clients address challenges and enhance their returns.

Saxet is an oil and gas company based in Houston, Texas, specializing in the acquisition and management of mineral and royalty interests across the United States. Comprised of experienced professionals from the exploration and production sector, Saxet leverages its extensive industry knowledge to identify and pursue strategic opportunities for growth. The company focuses on acquiring both working interests and mineral interests, generating exploration projects in multiple oil and gas basins. Through its targeted acquisitions, Saxet aims to enhance its portfolio while delivering exceptional service to its partners and stakeholders. This strategic approach positions Saxet for long-term growth in the energy sector.

Layne Water Midstream (“LWM”) is a full cycle water midstream business providing upstream oil and gas companies with water sourcing, disposal and recycling infrastructure and services in the Delaware and Midland Basins. Anchored by exclusive long-term contracts with key customers, landowners, the State of Texas General Land Office and the State of Texas University Lands organization, LWM operates significant source water, water transportation and produced water management infrastructure and is committed to further growth to support its upstream customers in the Delaware and Midland Basins.

Sierra Resources is a private oil and gas exploration and production company based in Houston, Texas. The company has significant experience in operating various onshore basins and has recently shifted its focus towards acquiring and developing unconventional oil and gas assets. Notably, Sierra Resources is actively engaged in the Eagle Ford Shale, where it aims to enhance its portfolio of reserves.

Nadel and Gussman is a fourth-generation family-owned oil and gas production and exploration company based in Tulsa, Oklahoma, with a history spanning over 70 years. Founded by Isadore Nadel in 1919, the company initially began with shallow oil investments and grew significantly after Herb Gussman, Nadel's son-in-law, joined in 1935. Under the leadership of Gussman and later executives Stephen Heyman and Jim Adelson, the company expanded its operations across various basins in the United States. Nadel and Gussman focuses on environmentally safe exploration and production methods, primarily targeting the Mid-continent, ArkLaTex, and Permian basin regions. The company emphasizes both operated and non-operated opportunities that utilize advanced horizontal drilling and completion technologies. Additionally, Nadel and Gussman has a corporate venture capital arm that further diversifies its business interests.

Moriah Henry Partners LLC is a Midland-based exploration and production company focused on the acquisition and development of oil and gas properties in the Midland Basin of West Texas. The Company is a collaboration among Post Oak Energy Capital, Henry Energy, LP and Moriah Energy Investments, LLC.

Oryx Midstream Services, LLC is a midstream company based in Midland, Texas, that specializes in the development, acquisition, ownership, and operation of midstream assets in the Permian Basin. Established in 2013, the company provides a range of services, including crude oil gathering, handling, and transportation, as well as natural gas gathering, compression, treating, and processing. Oryx also facilitates the transportation of natural gas liquids. The company aims to be a strategic partner for oil and gas producers in the United States, offering tailored solutions to meet their business needs. By connecting its gathering and transportation systems to key market hubs, Oryx delivers efficient and cost-effective services, enhancing its clients' access to domestic refineries and the U.S. export market. With a team of experienced professionals, Oryx Midstream Services is dedicated to supporting the energy industry in the region.

Tri-C Resources is an exploration and production company focused on the acquisition and development of oil and gas assets. It also specializes in the drilling, completion, and production of oil and gas wells. Tri-C Resources was founded in 1985 and is based in Houston, Texas.

Mavros Minerals is an oil and gas company focused on mineral energy assets. The company's focus lies in the acquisition of mineral and royalty interests and acting as local operators to source, analyze and execute on acquisition opportunities.

Mavros Minerals is an oil and gas company focused on mineral energy assets. The company's focus lies in the acquisition of mineral and royalty interests and acting as local operators to source, analyze and execute on acquisition opportunities.

Crown Oil Partners is an oil and gas company acquiring and managing various types of oil and natural gas properties. The company was founded in 2016 and is headquartered in Midland, TX.

Moriah Henry Partners LLC is a Midland-based exploration and production company focused on the acquisition and development of oil and gas properties in the Midland Basin of West Texas. The Company is a collaboration among Post Oak Energy Capital, Henry Energy, LP and Moriah Energy Investments, LLC.

Upcurve Energy LLC is an oil and gas company based in Houston, Texas, specializing in the exploitation of mature unconventional plays. Founded in 2015, the company focuses on acquiring acreage and existing wells, optimizing production through techniques such as recompletions and infill development. Upcurve Energy has extensive experience in key regions, including the Eagle Ford, Haynesville, Bakken, and Marcellus shale formations. The company pursues acquisitions of producing wells and acreage through cash purchases and drill and recompletion farm-ins, leveraging its expertise in horizontal completions and development in prolific shale areas to enhance production efficiency.

Rimrock Resource Operating is an oil and energy company focused on the development, acquisition, and exploration of the oil and gas industry. The company provides services including oil transportation, well site management, water transportation, crude oil marketing, contract pumping, service and repair, roustabout, and other small services. Rimrock Resource Operating was formed in 2015 in Tulsa, OK.

PetroEdge Energy IV, LLC is an oil and gas exploration company based in Houston, Texas, incorporated in 2014. The company specializes in the acquisition and development of natural gas and crude oil properties, with a particular emphasis on the Eagle Ford Shale in South Texas. PetroEdge Energy is committed to maintaining safe and environmentally responsible production practices while pursuing an aggressive acquisition and development strategy. Its focus includes building a robust inventory of opportunities in the Cretaceous Shelf Margin, allowing the company to enhance operational performance and recoverable reserves.

Double Eagle Energy Holdings (together with its affiliates and subsidiaries, “Double Eagle,”) principal business is crude oil and natural gas exploration, development and production through horizontal and vertical operations in the Midland Basin of West Texas. The company also focuses on acquiring oil and gas leases, working interest, mineral rights, and royalty interests throughout the Permian Basin. Double Eagle is one of the largest, if not the largest, organic acquirers of acreage in the Permian Basin in West Texas, and has historically been active across the United States in South Texas (Eagle Ford), the Mid-Continent (Mississippian, SCOOP, Penn Shales) and the Rockies (DJ Basin, Powder River Basin). Since forming Double Eagle in 2008, the Company has executed on over 10,000 individual lease transactions, totaling more than 1 million acres and more than $4.5 billion in transaction value. The company is headquartered in Fort Worth, Texas, with an additional office in Midland, Texas.

Oryx Midstream Services, LLC is a midstream company based in Midland, Texas, that specializes in the development, acquisition, ownership, and operation of midstream assets in the Permian Basin. Established in 2013, the company provides a range of services, including crude oil gathering, handling, and transportation, as well as natural gas gathering, compression, treating, and processing. Oryx also facilitates the transportation of natural gas liquids. The company aims to be a strategic partner for oil and gas producers in the United States, offering tailored solutions to meet their business needs. By connecting its gathering and transportation systems to key market hubs, Oryx delivers efficient and cost-effective services, enhancing its clients' access to domestic refineries and the U.S. export market. With a team of experienced professionals, Oryx Midstream Services is dedicated to supporting the energy industry in the region.

CPX Piceance is a natural resource development company based in Houston, Texas, established in 2014. The company specializes in the exploration and operation of oil and gas assets, with a strong focus on long-lived resources in the Piceance Basin, Denver-Julesburg Basin, and East Texas. CPX Piceance maintains a substantial portfolio of non-operated oil and gas interests and aims to enhance the value of its energy assets through strategic development and acquisition of prospective acreage at favorable valuations. The company is dedicated to improving natural resource development within the energy sector.

Crown Oil Partners is an oil and gas company acquiring and managing various types of oil and natural gas properties. The company was founded in 2016 and is headquartered in Midland, TX.

PetroEdge Energy IV, LLC is an oil and gas exploration company based in Houston, Texas, incorporated in 2014. The company specializes in the acquisition and development of natural gas and crude oil properties, with a particular emphasis on the Eagle Ford Shale in South Texas. PetroEdge Energy is committed to maintaining safe and environmentally responsible production practices while pursuing an aggressive acquisition and development strategy. Its focus includes building a robust inventory of opportunities in the Cretaceous Shelf Margin, allowing the company to enhance operational performance and recoverable reserves.

Maverick Brothers Energy produces and explores oil and natural gas properties. The company focused on the horizontal development of oil and natural gas properties located in western Oklahoma. Maverick Brothers will use proceeds from the investment to accelerate the development of its existing leasehold and to acquire additional oil and gas assets. It was founded in 1998 and is based in Enid, OK.

Refinery Specialties is an oilfield service company that formulates, manufactures, and provides technical service for the use of process and production treating chemicals for the oilfield, industrial, and water industries, including production, pipeline, refinery, and gas plants. The company strives to provide cost-effective treating programs with comprehensive monthly monitoring and reporting to identify problem areas, ensure correct chemical dosage and justify the cost of the chemical program.

CPR is an exploration and production company that focuses on the drilling and development of oil-prone shale plays. It also focuses on the development of shale oil resources via joint ventures, farm-ins, and organic leasing opportunities with existing acreage owners and operators.

Core Appalachia is a privately held, independent producer and processor of natural gas in the Devonian region in Kentucky, Virginia and West Virginia. Headquartered in Charleston, West Virginia, Core’s 5,600 conventional wells are strategically positioned throughout 1.2 million acres of the southwestern Appalachian Basin to meet the growing regional demand for natural gas.

Refinery Specialties is an oilfield service company that formulates, manufactures, and provides technical service for the use of process and production treating chemicals for the oilfield, industrial, and water industries, including production, pipeline, refinery, and gas plants. The company strives to provide cost-effective treating programs with comprehensive monthly monitoring and reporting to identify problem areas, ensure correct chemical dosage and justify the cost of the chemical program.

Richland-Stryker Generation is a power generation company that operates gas and oil-fired peaking power generation facilities. These facilities serve PJM, a regional transmission organization which coordinates the movement of electricity in all or parts of 13 Northeast and Midwestern states and the District of Columbia.

Bayou Well Services is a provider of oilfield services operating across the United States. The company specializes in pressure pumping, fluid logistics, and rental tools, offering a comprehensive range of services that includes workover, plug and abandonment, fluid management, hydraulic fracturing, well-servicing rigs, tank rentals, and fluid transfer. Through these services, Bayou Well Services supports various aspects of oil and gas production, ensuring efficient operations for its clients in the energy sector.

Crown Oil Partners is an oil and gas company acquiring and managing various types of oil and natural gas properties. The company was founded in 2016 and is headquartered in Midland, TX.

Black Oak Resources is an exploration and production company focused on oil and natural gas properties. The company pursued upstream acquisition and development opportunities in the Permain Basin and Mid-Continent areas. Black Oak Resources was formed in 2008 in Austin, TX.

Chaparral Energy, Inc. is engaged in the acquisition, exploration, development, production, and operation of oil and natural gas properties, primarily in Oklahoma, United States. The company focuses on selling crude oil, natural gas, and natural gas liquids to refineries and gas processing plants. It holds approximately 210,000 net surface acres in the Mid-Continent region, with about 122,000 net acres located in the STACK play across Canadian, Kingfisher, and Garfield counties. As of December 31, 2019, Chaparral's estimated proved oil and natural gas reserves were 96.6 million barrels of crude oil equivalent, and it had interests in 2,782 gross producing wells, including 866 that are company-operated. Founded in 1988, the company is headquartered in Oklahoma City, Oklahoma.

RAM Energy Resources is an oil and gas company dedicated to the development and acquisition of oil and natural gas properties. Established in 1987, the company operates primarily in Texas, Louisiana, and Oklahoma, where it manages existing oil and gas assets while pursuing new acquisition opportunities. RAM Energy Resources is involved in both the exploration and development of conventional and non-conventional oil and gas assets, as well as the drilling of oil and natural gas wells.

Breitburn Energy Partners is an oil and gas company that explores and develops oil and gas producing properties. The company's current assets consist primarily of producing and non producing crude oil reserves located in the Los Angeles Basin in California, the Wind River and Big Horn Basins in central Wyoming, the Sunniland Trend in Florida, the Permian Basin in West Texas and Michigan. Breitburn’s goal is to provide unitholders with stable and growing cash distributions.

National Specialty Alloys is a processor and distributor of premium stainless steel and nickel alloy bars and shapes. The company specializes in nickel alloy products and maintains a diverse inventory to meet the specific demands of its customers. By focusing on high-quality materials, National Specialty Alloys serves a variety of industries that require specialized alloy solutions.

EV Energy Partners is an oil and gas company that deals in the mining and drilling of oil & gas.

Atlas Energy is a limited liability company based in Philadelphia, Pennsylvania, specializing in the development and production of natural gas and, to a lesser extent, crude oil. The company primarily operates in the Appalachian Basin, focusing on the extraction of natural gas and natural gas liquids. In addition to its production activities, Atlas Energy sponsors and manages tax-advantaged investment partnerships, utilizing these investments to finance the exploration and development of its acreage.

LINN Energy, based in Houston, Texas, is an independent oil and natural gas company that focuses on the acquisition, exploration, and development of unconventional reserves. The company holds interests in approximately 150,000 net acres in the Anadarko Basin, specifically within the Merge, SCOOP, and STACK plays. LINN Energy aims to maximize cash flow through a growing portfolio of long-life oil and natural gas assets, and it has established itself as a significant player in the U.S. energy sector with a substantial amount of proved reserves. Through its equity interest in Roan Resources LLC, LINN Energy continues to enhance its operations and asset profile in key producing basins across the United States.

Balcones Energy is a development company designed to invest in the oilfield service and equipment sector with a particular focus on compression and artificial lift. The company's initial investment was in Precision Compression Services, which develops and produces compressor packages geared towards later life, low pressure, and/or low volume wells with an objective of lowering costs and improving well performance.