The money-flow chart (open the interactive one above).
The theme quarter by quarter
Each supplier's quarterly revenue scaled by the share of it this chain takes (its attributed share of the trailing twelve months), summed; 4 companies in the latest quarter, +0.4% against a year earlier.
Companies
TSLA Tesla $147.3B · Automotive Revenues + Automotive sales
SQM Chemical & Mining of Chile $4.6B · total revenue