Investor FAQs Show All Where is Middlesex Water Company's common stock listed? Our common stock is listed on NASDAQ under the symbol MSEX. For more detailed stock information, please visit our Stock page. How can I request additional information from Middlesex Water Company? For additional information, please visit our Contact Us page. How can I receive Email alerts from Middlesex Water Company? To sign up for Email alerts on our Events, SEC Filings, News Releases and closing stock price information click here to visit our Email Alerts page.