Private equity firms Abry Partners and Castik Capital, completed the acquisition of Reward Gateway, a global HR technology and employee engagement company, from Great Hill Partners, a private equity firm. Financial terms were not disclosed. “We are grateful for Great Hill’s support and guidance, and excited to work with new partners who also understand and appreciate our core values, and who will support our vision for product innovation and growth, both organic and through acquisitions," Doug Butler, Reward Gateway CEO.