Joseph Michael Tanner

Preferred Sands, Inc. provides sand-based proppant solutions. It operates through the sand and coated technology segments. The sand segment focuses on mining, processing, and distributing frac sand sold under supply agreements to oil and natural gas customers in connection with hydraulic fracturing of oil and natural gas wells. The company was founded by Michael O’Neill in 1992 and is headquartered in Radnor, PA.

Petroserv Marine, Inc. is a Brazilian company that was founded in 1972. The private company is based in Macae, Brazil. The company manufactures drilling equipment and provide offshore drilling and oil production services.

Merichem Co. produces naphthenic acids and copper naphthenate. The company is divided into two subsidiaries, Merisol USA which handles all the phenolic products and Merichem Chemicals & Refinery Services, which provides caustic management, sulfur removal, naphthenic acids and other products and services to the refinery and coal processing industries. Merichem was founded in 1945 and is headquartered in Houston, TX.

Hornblower Group, Inc. is a global leader in experiences and transportation, offering water-based experiences, land-based experiences, overnight cruise experiences, and ferry and transportation services. Hornblower Group's corporate businesses are comprised of three premier experience divisions: American Queen Voyages®, its overnight cruising division; City Experiences, its land and water-based experiences as well as ferry and transportation services; and Journey Beyond, leading experiential travel group. The private company's portfolio covers 114 countries and territories, 125 cities, and serves more than 22 million guests annually. Hornblower Group is the world's leading provider of water-based experiences, with a fleet of over 200 vessels and 6,500 full-time and part-time crew members. The company was founded in 1980 and is headquartered in San Francisco, CA, with subsidiaries in the United States, Australia, and Spain. The CEO is Kevin M. Rabbitt.

The Boys & Girls Clubs of Greater Houston, Inc. operates as a youth-development organization. The company was founded by Paul Boesch, Eddy Scurlock, Bob Smith, and George Strake, Sr. in 1952 and is headquartered in Houston, TX.

Noble Corp. Plc engages in the provision offshore drilling services for oil and gas industry. It focuses on a balanced fleet of floating and jackup rigs and the deployment of drilling rigs in oil and gas basins around the world. The company was founded by Lloyd Noble and Art Olson in 1921 and is headquartered in Sugar Land, TX.

Goldman Sachs & Co. LLC (GS&Co.) is a securities brokerage firm headquartered in New York City. Founded in 1927, the firm is a subsidiary of The Goldman Sachs Group, Inc. (NYSE: GS). GS&Co. provides services to help hedge funds manage risk, monitor portfolios, maintain liquidity and build their businesses. They offer clients access to global equity and derivatives markets, as well as foreign exchange, commodities, European Lefts, rates and credit across the Americas, Europe and Asia. The firm proactively monitors capital markets, searching for pockets of liquidity and news that may require changes to those strategies. Integration with the Goldman Sachs network gives clients access to the firm's sectored block trades and their insights into price discovery. Their electronic trading program provides clients with tools to manage their trades from pre-trade analytics to post-trade analysis.

Tudor, Pickering, Holt & Co. LLC provides investment banking services. The company was founded in 2007 and is headquartered in Houston, TX.

The San Diego Blood Bank provides blood and blood related laboratory services. Its services include blood collection, component preparation, platelet­pheresis, plasmapheresis, leukapheresis, washed blood, frozen blood, autologous storage, designated donation services and a reference laboratory­. The company was founded by Thomas O'Connell and Frederick G. Hollander in 1950 and is headquartered in San Diego, CA.

Rohm & Haas Co. develops and manufactures specialty chemicals, paints, adhesives, and materials. The company was founded by Otto Röhm and Otto Haas on September 1, 1909 and is headquartered in Philadelphia, PA.

Part of INEOS AG, INEOS Oligomers is a company that produces low viscosity Polyalpha Olefins. The company is based in League City, TX.

Nalco Co. engages in the provision of chemistry programs and services. It serves upstream and midstream oil and gas industry, and refineries and petrochemical operations. Its services includes energy exploration and production; oil and as midstream; and refining, fuel additives, and petrochemical. The company was founded in 1928 and is headquartered in Sugar Land, TX.