The original certificate(s) must be submitted with the Legal Transfer if you hold shares in stock certificate form. Middlesex Water Company ("Middlesex" or the "Company") is offering 211,201 shares of its common stock, no par value ("Middlesex Common.Check if MSEX Stock has a Buy or Sell Evaluation. MSEX Stock Price (NASDAQ), Forecast, Predictions, Stock Analysis and Middlesex Water Company News. Step 2: Sign up for your brokerage account. Now that you've chosen your brokerage, the next step is to fill out some personal details so you can buy MSEX today.