Lincolnshire Management | 1,681 followers on LinkedIn. Over 33 years of successful middle-market private equity investing | Lincolnshire Management Inc., founded in 1986, is a private equity firm focused on investing in and acquiring growing middle market companies across an array of specific industries. The firm has invested in a wide variety of industries through more than 100 acquisitions over the last 35 years. Lincolnshire has invested over 1.5 billion across platform investments and add on acquisitions.