List of Hydrogen Stocks

I generally want hydrogen related businesses to be a significant part of revenue in order to make the list…. SFC does do fuel cells, but as far as I can tell, hydrogen fuel cells are only a small part of its business. Save for Hexagon… they do make hydrogen fuel tanks and pipelines, but it seems to be a tiny part of their business. If I’m wrong about that, please let me know and let me know where you found the info.