SMLP Summit Midstream declares $0.575 dividend Jul. 26, 2018 5:18 PM ET|About: Summit Midstr... (SMLP) Summit Midstream (NYSE:SMLP) declares $0.575/share quarterly dividend, in line with previous. Forward yield 13.41% Payable Aug. 14; for shareholders of record Aug. 7; ex-div Aug. 6.