MP vs SOLS Comparison

MP Materials Corp is the producer of rare earth materials in the Western Hemisphere. The company owns and operates the Mountain Pass Rare Earth Mine and Processing Facility, the only rare earth mining and processing site of scale in North America. The company is also developing a rare earth metal, alloy, and magnet manufacturing facility in Fort Worth, Texas. The company's operations are organized into two reportable segments: Materials and Magnetics.

Solstice Advanced Materials is a diversified specialty chemicals company created in late 2025 after being spun off from Honeywell. It sells chemicals and materials to a wide range of end markets. Its largest product category is refrigerants used in heating, ventilation and air conditioning systems, and autos, where Solstice sells low global warming potential refrigerants. The company also sells materials used for building and construction, semiconductor production, healthcare packaging, and defense. Additionally, Solstice runs the only US uranium conversion business currently in operation.