"I am indebted to the game for the variety of opportunities and experiences that have been provided to my family and I, and we leave with many great memories and life long friendships.
"My sincere thanks to all the stakeholders across the game, particularly the fans who are the lifeblood of rugby league. Their unwavering passion for the game is wonderful.
"I remain in awe of the players skill and bravery to play this game week in and week out & I thank all of them, both past and present for their friendship and support.
"My thanks also to the staff and Executive team at the NRL. It has been an absolute honour to lead this team of talented, resilient and hard working professionals."
Andrew Abdo has been appointed as acting CEO while the search begins for a new CEO.
ARLC Chairman Mr Peter V'landys, who has been the face of the NRL during the coronavirus crisis thanks Greenberg for his work in the role.
"The role of Chief Executive of the NRL is one of the most challenging and difficult roles in Australian sport, with a diversity of passionate stakeholders," V'landys said. "ARLC thanks Todd for his contribution to the game over the last 7 years and as Chief Executive for the last four years".
Greenberg's role has been on a knifes edge over the past few weeks after copping much of the blame for the NRL's current predicament.
Financially, the NRL is a precarious position despite billion dollar TV deals, while the front office has been accused of wasting money.
Similarly, his relationship with clubs has been increasingly strained, with the Warriors vocal in criticism as the team works out what life in Sydney will look like for the New Zealand club.
Former NRL great and Fox League analyst Braith Anasta took aim over the weekend saying Greenberg had been silenced and Greenberg "will be there no longer".
"We can't believe where the NRL finds itself," Anasta said. "That' why we get to start fresh, Peter V'landys is the right leader to run this business. His relationship with broadcasters is important because the broadcast rights are up in 2022, so there's a lot going on behind the scenes. I think he's doing everything possible to make sure this game of ours is run like a business and we can have some assets moving forward and never find ourselves in position again. It's a real wake up call for the game.