Rheo Minerals.  Not anything new. For the first few years of the company it was known as Hectatone Inc., but the change from Western Lithium to Lithium Americas concurrently resulted in a name change of Hectatone Inc. to Rheo Minerals Inc.

This LAC subsidiary subject sometimes comes up when someone claims there is "No revenue" from LAC, since the oil field drilling additive product and animal food adsorbent additive products marketed out of Rheo Minerals is often discounted.  It doesn't generate a great deal of revenue, but it is a different application of lithium and the lithium used in their products is outsourced and not from either Cauchari-Olaroz or from the proposed Thacker Pass Lithium mine.

The company has been around since 2013, but sales and income have always been minor in comparison to the expected income for LAC in the future from Cauchari-Olaroz and/or Thacker Pass.

https://www.bizapedia.com/nv/rheominerals-inc.html

A little history on the company and on its name change back in 2016:

"In 2016, Hectatone’s parent company, Western Lithium USA Corp., merged with the Canadian company, Lithium Americas Corp. Its wholly owned subsidiaries also changed names. Western Lithium Corp. became Lithium Nevada Corp. and Hectatone Inc. re-launched its brand, changing its name to RheoMinerals Inc."

https://elkodaily.com/mining/rheominerals-finding-ways-to-innovate-collaborate/article_a61685e8-e53d-5ee5-be84-d468ea541122.html

One application of a product made by RheoMinerals Inc. may eventually find use at the proposed Thacker Pass Lithium Mine.  See this quote from the Elko Daily Free Press article back in 2017 and linked above:

"Geosynthetic organophilic clay liners are used for the impoundment of industrial waste water. If the impoundment is to be built in porous soils, geosynthetic liners made of organophilic clays can be used to grab the organic molecules out of the water but let the clean water pass through into the soil.

Organophilic clay products are also used in soil remediation with contaminated soils to stabilize the hydrocarbons to prevent leaching into nearby clean soil. The soil containing the stabilized hydrocarbons can be disposed in landfills."

Here is the link to the web page for Rheo Minerals Inc. :

https://rheominerals.com/

Alexi Zawadzki was quoted in a 5 December 2019 article in the Elko Daily Free Press regarding the source of clay used by Rheo Minerals Inc. for their products:

"Lithium Nevada earlier hoped to mine clay at the Thacker Pass site for RheoMinerals in Fernley that produces specialty clay minerals and is a subsidiary of Lithium Americas, but that didn’t happen.