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Andrew Carnegie was born on November 25, 1835, in Dunfermline, Scotland. He was one of the wealthiest Businessmen in the 19th Century. He used to build railroads. Andrew Carnegie was one of the first Businessmen to gain fortune during industrialization. He made his fortune in the steal industry. By 1899, the Carnegie steel company made more steel than Britain. He attempted to control as much of the steel producers through horizontal integration.
Sources:Notes "Big Business and Labor"Page2 https://www.biography.com/people/andrew-carnegie-9238756

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Charles Tyson Yerkes was born on June 25, 1837 in Philadelphia, Pennsylvania and died in December 29, 1905 at the age of 68 in New York City.  He was an American financier, and played a major role in developing mass-transit systems in Chicago and in London.
sources: http://www.chicago-l.org/figures/yerkes/

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John D Spreckels was born on August 16, 1853 in Charleston, SC and died on June 7, 1926, in San Diego, CA. He was a founder on a transportation and real estate empire in San Diego. He had a hotel named "Hotel Del Coronado" He created his very own "Electric Railway Company"
sources:https://en.wikipedia.org/wiki/John_D._Spreckels

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John D Rockefeller was born on July 8,1839 and died on May 23, 1937. He was the founder of Standard Oil Company, and became one of the wealthiest men and major philanthropist.  John D Rockefeller built his Standard Oil Company in Ohio. BY 1880, his company controlled 90% of the industry. He bought out competitors and was able to raise prices far above normal levels. Critics began to call businessmen like Rockefeller "Robber Barons." They were taking advantage of their tough situation.
Sources: notes "Big Business and Labor" pg 2,
http://www.history.com/topics/john-d-rockefeller

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J.P. Morgan was born on April 17, 1837 in Hartford, Connecticut and died on March 31, 1913 in Rome, Italy. He was one of the most powerful bankers during his time, he financed railroads. J.P Morgan would make $49 billion. J.P Morgan's U.S. steel company bought Carnegie steel in 1901, making it the world's largest business
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