NXG Cushing Midstream Energy Fund is a closed-ended balanced mutual fund launched by Swank Capital, LLC. The fund is managed by Swank Energy Income Advisors L.P. It invests in the public equity and fixed income markets across the globe with a focus in United States. The fund typically invests in MLPs, Other Natural Resource Companies, and global commodities. It primarily invests in the securities of MLPs, other equity securities, debt securities, and securities of non-U.S. issuers employing a fundamental analysis. NXG Cushing Midstream Energy Fund was formed on May 23, 2007 and is domiciled in Dallas.

NXG NextGen Infrastructure Income Fund is a closed ended equity mutual fund launched and managed by Cushing MLP Asset Management, LP. The fund invests in stocks of companies across the energy supply chain spectrum, including upstream, midstream and downstream energy companies, as well as oil and gas services and logistics companies, energy-intensive chemical, metal and industrial and manufacturing companies and engineering and construction companies. NXG NextGen Infrastructure Income Fund was formed in 2012 and is domiciled in the United States.