Abstract: Realta Fusion is a startup spun out from the University of Wisconsin - Madison aiming to decarbonize industrial heat and power with axisymmetric magnetic mirror fusion power plants. Realta Fusion actively sponsors magnetic mirror research on the Wisconsin HTS Axisymmetric Mirror (WHAM), which had its first plasma in July 2024, and is working to develop a tandem mirror fusion pilot plant, Hammir. In this presentation, we will discuss Realta Fusion's mirror development roadmap, early experimental results from WHAM with comparisons to simulations using Realta Fusion's RealTwin modeling framework, and a number of aspects of the Hammir tandem mirror pilot plant design.