Dennis Riordan

Kelso & Co LP (Kelso) is a private equity firm is founded in 1971 by Louis Kelso. The firm is headquartered in New York, US.

Part of Industry Super Holdings Pty Ltd., Buckeye GP LLC operates refined petroleum products pipeline systems. The company is based in Wayne, PA.

National Audubon Society, Inc. conserves and restores natural ecosystems. The firm preserves species of birds, other animals, and their natural habitats. Its projects include saving habitat in the everglades, arctic wildlife refuge, long island sound, and mississippi river basin. The company was founded in 1905 by George Bird Grinnell and is headquartered in New York City, NY.

Part of Kelso & Cos., Inc., Kelso Breathe Investor LP operates as a private equity fund. The company is based in New York, NY.

Zenith Energy US LP owns and operates barrels of renewable fuels, crude oil, petroleum products, chemicals, and vegetable oil storage. It focuses on building a sustainable, independent liquid storage terminals business that delivers safe and reliable solutions. The company was founded by Jeffrey R. Armstrong and is headquartered in Houston, TX.

Physicians Endoscopy LLC owns and manages freestanding ambulatory surgery centers. It offers design and development services for ASCs, management services related to finance, professional guidance, clinical operations, human resources, and marketing. The firm provides professional management, billing and collections, design and development, and physician recruiting. The company was founded in July 1998 and is headquartered in Jamison, PA.

Part of Global Ship Lease, Inc., Poseidon Containers Holdings LLC provides marine cargo services. The company is based in Kifisia, Greece. Poseidon Containers Holdings was acquired by Global Ship Lease, Inc. on November 15, 2018 for $24.17 million.

Progressive Medical LLC provides medical supplies and services to insurance carriers. The company was founded by David Bianconi in 1986 and is headquartered in Westerville, OH.

Tallgrass Energy Holdings LLC engages in business services industry. The company is headquartered in Overland Park, KS.

Ajax Resources LLC provides oil and gas drilling services. The company was founded in June 2015 and is headquartered in Huston, TX.

P2 Holdco LLC engages in providing medical supplies and services to insurance carriers. The company is headquartered in Memphis, TN.

Tallgrass Development LP provides natural gas transportation and storage services. The firm also operates natural gas processing plants in Wyoming; and a carbon dioxide and sulfur treating facility in West Frenchie Draw, Wyoming. The company is headquartered in Leawood, KS.

Tallgrass Equity LLC distributes petroleum products through pipelines. The company is headquartered in Leawood, KS.

TEGP Management LLC is an investment holding private company. The company is based in Leawood, KS. The CEO of the company is Matthew P. Sheehy.

Part of Tallgrass Energy LP, Tallgrass MLP GP LLC provides investment services. The company is based in Overland Park, KS. David G. Dehaemers has been the CEO of the company since 2013.

Endo Pharmaceuticals, Inc. manufactures and distributes pharmaceutical products. The company provides research and development of generic pharmaceutical products for controlling pain. Its product includes Lidoderm, Percocet, Percodan, Frova, DepoDur, and Zydone. The company is headquartered in Malvern, PA.

Hunt Marcellus LLC engages in the acquisition and development of natural gas assets. The firm is a joint venture between Kelso and the Hunt Oil Company formed specifically to acquire and develop natural gas assets in the Marcellus shale. The company was founded in 2010 and is headquartered in Dallas, TX.

Oceana Therapeutics, Inc. manufactures pharmaceuticals and medical devices. It develops and commercializes therapeutics with a focus on colorectal, gastroenterology, and urological diseases. The firm provides Deflux that is used for the treatment of Vesicoureteral reflux, urological conditions and Solesta which is used for the treatment of fecal incontinence. The company was founded in 2008 and is headquartered in Edison, NJ.

Rasmuson Foundation engages in the support of non-profit organizations and individuals to improve life. The company was founded by Jenny Olson Rasmuson in May 1955 and is headquartered in Anchorage, AK.