What was the name given to the richest leaders of industry in the lte 1800s?

The richest leaders of industry in the late 1800s were commonly referred to as "captains of industry" or "robber barons." These terms highlighted their significant wealth and influence, with "captains of industry" suggesting they contributed positively to the economy, while "robber barons" implied unethical practices in their pursuit of wealth. Prominent figures included John D. Rockefeller, Andrew Carnegie, and J.P. Morgan.