 HOUSTON, April 7, 2021 PRNewswire -- Summit Midstream Partners, LP NYSE: SMLP the Partnership announced today that it has amended its offer to exchange the Exchange Offer its 9.50 Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units Liquidation Preference 1,000 the Series A Preferred Units tendered in the Exchange Offer for up to 2,400,000 newly issued common units representing limited partner interests in the Partnership the Common Units. The Partnership has extended the expiration date of the Exchange Offer to 11:59 p.m. 