Constellation Software Inc. (Constellation) is a Canada-based company, engaged in acquiring, managing and building vertical market software (VMS) businesses. The Company operates through two segments: public sector and private sector. The public sector segment, which includes business units focused primarily on Government and Government-related customers. Its public sector segment includes Volaris, Harris and TSS Operating Groups. The private sector segment, which includes business units focused primarily on commercial customers. Its private sector segment includes Jonas, Perseus and Vela Operating Groups. The Company is engaged in the development, installation and customization of software relating to the markets, which include asset management, municipal systems, public transit operators, lease management, window manufacturers, winery management, food services and metal service centers, among others. It is also engaged in the provision of professional services and support.