Niagara Mohawk Power Corp. (NMPWP: Grey Market) | Scheduled Ex-Dividend Fri, Aug 24, 2018 11:38 - Niagara Mohawk Power Corp. ( NMPWP : Grey Market) - Scheduled Ex-Dividend - Niagara Mohawk Power Corp. has announced a dividend ex-date for (NMPWP: Grey Market). Niagara Mohawk Power Corp. is scheduled to disburse a Cash Dividend dividend of $0.85 on Fri, Sep 14, 2018 to shareholders of NMPWP. You may find a complete list of dividends at otcmarkets.com .