Is Astar private or public?

Can you please clarify whether Astar is a privately or publicly owned entity? It's important to understand the ownership structure and the implications it may have on the project's decision-making process, transparency, and potential for growth. Are there any specific reasons why Astar chose to operate as a private or public entity, and what benefits does this choice bring to its stakeholders? Additionally, is there any information about future plans to change the ownership structure or introduce new stakeholders into the mix?