MBN Corporation is a closed-ended equity mutual fund launched by Middlefield Fund Management Limited. The fund is managed by Middlefield Capital Corporation and Groppe, Long & Littell. It invests in the public equity markets of Canada. The fund invests in stocks of companies operating across energy related sectors with a focus on oil sands sector. It benchmarks the performance of its portfolio against the S&P/TSX Composite Index. The fund was formerly known as OilSands Canada Corporation. It was formerly known as Middlefield Tactical Energy Corporation. MBN Corporation was formed on June 1, 2007 and is domiciled in Canada.