David R. Marchese

Haddington Ventures LLC (Haddington Ventures) is a private equity firm founded in 1998 by James Chris Jones and John A. Strom. The firm is headquartered in Houston, Texas.

Reliant Energy Ventures, Inc. is a venture capital firm headquartered in Houston, Texas

Jacobs Engineering Group, Inc. engages in the provision of a diverse range of technical, professional, and construction services to industrial, commercial, and governmental clients. The firm operates through Critical Mission Solutions, and People & Places Solutions segments. The Critical Mission Solutions provides a full spectrum of cyber, data analytics, systems and software application integration and consulting services. The People & Places Solutions provides end-to-end solutions for clients' complex challenges like whether climate change, energy transition, connected mobility, integrated water management, smart cities or vaccine manufacturing. The company was founded by Joseph J. Jacobs in 1947 and is headquartered in Dallas, TX.

Apex Compressed Air Energy Storage LLC develops, constructs, owns and, operates compressed air energy storage plants. Its power generation facility uses electric motor-driven compressors to inject air into an underground storage cavern and later releases the compressed air to turn turbines and generate electricity back onto the grid. The company was founded in 2011 and is headquartered in Houston, TX.

Eschelon Energy Partners (Eschelon Energy Partners) is a private equity firm founded in 2004 by Tom Glanville. The firm is headquarters in Houston, Texas.

CAES Development Co. LLC develops compressed air energy storage facilities. The company converts excess electricity generated at night by base load coal and nuclear power plants into more profitable and flexible daytime energy. The firm was founded in 1998 and is headquartered in Houston, TX.

Endicott Biofuels II LLC develops cleaner fuel alternatives. The company was founded by Christopher J. Frantz in 2007 and is headquartered in Houston, TX.

Caliche Development Partners LLC provides underground hydrocarbon liquids storage services. The company was founded by Dave Marchese and David Branch and is headquartered in Houston, TX.

Part of Energy Transfer LP, Coastal Caverns, Inc. is a company that provides storage for hydrocarbons and natural gas liquids. The company is based in Houston, TX. Coastal Caverns was acquired by Energy Spectrum Capital from Caliche Development Partners, LLC on March 31, 2022.