It details a forecast and trends for Metallurgical Grade Silicon Market & trends through 2032...
It is interesting that both PYR and HPQ are referenced given the lack of commerical produciton thus far. With that being said, however, this is a forward looking forecast - so why not include companies that are in the process / brink of introducing a paradigm shift in this particular market.
https://www.factmr.com/report/1568/metallurgical-grade-silicon-market