Philip Kovacs

Appleton Learning Corp. provides academic coaching and support services. It specializes in test preparation, academic testing, report card review, summer camps, and student assessment services. The firm partners with school districts to provide staffing and educational program services. Appleton is a school solutions company that helps districts professionalize their para-educators, substitutes, and extended learning programs. The company was founded by Glenn Clayton in 2004 and is headquartered in Huntsville, AL.

Mark Two Ventures LLC (Mark Two Ventures) is a venture capital firm founded by Glenn Clayton in 2021. The firm is headquartered in Nashville, Tennessee.

Tango Tango, Inc. is an American telecommunications technology company that uses advanced networking, mobile, and cloud technologies to expand the coverage and capabilities of their customers' radio systems. The private company offers a complete communications service that integrates with any traditional land-mobile radio system, providing group and one-to-one calling, GPS tracking, emergency alerts, and text/media group messaging through their mobile push-to-talk app. The app securely integrates with existing radio systems, providing unprecedented interoperability, coverage, and features for a fraction of the cost of a traditional radio system.