This year, Reddit's r/WallStreetBets message board became a force on Wall Street through the meme stock frenzy as individual investors used the forum to co-ordinate their buying and drive up the prices of several stocks, such as games retailer GameStop.
Reddit's founders have said that the "anything goes" ethos was never their intention when creating the website and that its role as a haven for free speech arose by accident.
In recent years, the company has been bent on policing its forums more actively and building an advertising business in preparation for a move to the public markets.
Reddit has had a long and tortuous path to Wall Street. It was founded in 2005, a year after Facebook, and was bought by Condé Nast a year later for US$10 million.
It was later spun out again as a separate company and went through a string of chief executives before co-founder Steve Huffman returned to run Reddit and prepare it for a listing.
Written by: Richard Waters
© Financial Times