 NEW YORK, March 17, 2021 PRNewswire -- Vericel Corp. NASD:VCEL will replace QEP Resources Inc. NYSE:QEP in the SP SmallCap 600 effective prior to the opening of trading on Monday, March 22. SP 500 constituent Diamondback Energy Inc. NASD:FANG has acquired QEP Resources in a transaction that closed today. 