Hi rkeeb and Cal,

The below is from the latest announcement of LAC, which shows LAC owns 12.9%(14.6% on a fully dilluted basis) of Arena Minerals. 

The investment is part of a C$10 million non-brokered private placement of subscription receipts of Arena Minerals (the “Offering”). The proceeds of the Offering will be applied by Arena Minerals to the acquisition of the Sal de la Puna lithium brine project in Salta, Argentina, exploration and development expenditures on the Company's lithium assets and for general corporate purposes. Lithium Americas currently does not hold any securities of Arena Minerals. On closing, assuming completion of the full $10 million offering by Arena Minerals, the Company will own approximately 12.9% (14.6% on a fully diluted basis) of the issued and outstanding shares of Arena Minerals.

As to Ganfeng, they purchased 18.7% of the shares of Arena in January this year, and exercised the warrant and purchased more shares in June, so totally they have 35% of Arena now.  

FYI