Jeff A. Derbyshire

Willoughby Capital Holdings LLC (Willoughby Capital Holdings) is a private equity and venture capital firm founded in 2009 by Daniel Och. The firm is headquartered in New York with an office in Greenwich, CT.

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

Plains Exploration & Production Co. was an independent energy company, which was engaged in the activities of acquiring, developing, exploring and producing oil and gas properties. It was owned oil and gas properties in onshore and offshore areas of California, the Gulf Coast Region, including Haynesville Shale, Eagle Ford Shale and South and East Texas, the Mid-Continent Region and the Rocky Mountains. The company was founded on September 28, 1990 and was headquartered in Houston, TX.

Founded in 1974, Simmons & Company International is an independent investment bank headquartered in Houston, Texas. The firm is a subsidiary of Piper Jaffray & Co. and their ultimate parent is Piper Jaffray Cos. (NYSE: PJC). Simmons & Co. specializes in the entire spectrum of the energy sector. They also provide services related to M&As and divestitures, public offerings, institutional research and sales and trading.

Founded in 2004, TD Securities (USA) LLC is a broker/dealer located in New York City with additional offices in Toronto, Montreal, Calgary, Vancouver, London, Singapore, Tokyo and Sydney. The firm is a subsidiary of Toronto Dominion Holdings (USA), Inc. and their ultimate parent is Toronto-Dominion Bank (NYSE: TD). TD Securities (USA) provides a wide range of capital market products and services to corporate, government and institutional clients in five areas of finance including: investment banking, debt capital markets, institutional equities, foreign exchange and money markets. Their services include the underwriting and distribution of new debt and equity issues, providing advice on strategic acquisitions and divestitures and executing daily trading and investment needs. The equity group provides research coverage of media and communications, technology, financial services, oil and gas, mining and metals, industrial products, forest products, technology, utilities and power, real estate, biotechnology, consumer products and merchandising and quantitative analysis strategy. The fixed-income group provides a full range of underwriting sales and trading products for Canadian, U.S. and European debt issuers and investors.

Summit Partners LP (Summit Partners) is a private equity firm founded in 1984 by Gregory Avis, Roe Stamps and Stephen Woodsum. The firm is headquartered in Boston, Massachusetts.