Latest turnover: 36,931,000
Three-year compound growth rate (%): 32.83
Latest EBITDA: £2,647,888
Williams & Co, as they are otherwise known as, is a trade wholesaler, who only works with professional plumbers and merchants.
The website suggests that they are the only trade supplier in the South of England.
Founded over 35 years ago, the company only employs people who have had a substantial amount of experience in the trade.