My sentence is:
ATC experienced rapid growth between 1880 to 1911. In 1890, their five main competitors joined their consortium and by 1910, the American Tobacco Company had absorbed 250 companies, producing 80% of the tobacco products in the United States of America and had grown its equity from $25 million to $316 million.
I am conflicted on how to refer to USA (Bold part)
in the United States of America
in United States of America
Also, sneaky second question if you guys don't mind :)
Do you think my sentence is too long?