Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. AGC Aerospace & Defense is the unifying brand for a private equity firm - Acorn Growth Companies. Acorn, which is based out of Oklahoma City, invests in or acquires smaller companies within the aerospace and defense sector. Since inception, Acorn has acquired five businesses and started three. All the companies were aligned under the AGC Aerospace and Defense umbrella in 2009. The companies support DoD directly or as subcontractors to OEMs or Tier 1 defense contractors.