What role, if any, did the British East India Company play in the American Civil War?

Not sure why you would think that the British East India Company would play ANY role in the American Civil War. It was a chartered English trading company that was allowed not only monopolistic trade but political control in its trade areas, which did not in any coincide with the United States of America in 1860.

The East India Company lost its political power in 1857 after the Indian revolt of 1857 and ceased being a legal entity in 1874.

whale

They bought cotton from the South--what made it through the blockades.

Cotton production boomed incredibly during the American Civil War between 1861-1865 because Britain relied solely on India for cotton rather that both India and America. Also during this time the port was modernized and Mumbai expanded northward on more reclaimed land.

I'm not answering the question, I'm commenting on the term you use, "American Civil War." That term is totally incorrect. The actual and proper name for the war of 1861-1865 is the War for Southern Independence.

None whatsoever! It was abolished in 1858.

they supported the south, tried to run northern blockades ,why? cotton my friend!