Carnegie Steel Company.

The Carnegie Steel Company was the final conglomeration of several steelworks, bridge companies and coke works under Andrew Carnegie. Beginning with the firm of Carnegie, Kloman and Company, Andrew Carnegie created several more steelworks and other companies eventually becoming the largest producer of steel in the world, while also becoming the richest man in the world. In 1901, Carnegie sold his interests in his company to financier J.P. Morgan, leading to the development of the United States Steel Corporation, which later became USX Corporation. After retiring from business, Carnegie set his ambition towards philanthropic activities. Among his efforts were the thousands of libraries created throughout Europe and North America. Altogether, Carnegie gave away over $350 million.

From the description of Carnegie Steel Company photographs 1850-1900 (1900) [picture]. (Historical Society of W Pennsylvania). WorldCat record id: 50291740

From the description of Carnegie Steel Company records 1853-1912 (1869-1912). (Historical Society of W Pennsylvania). WorldCat record id: 49422216