ATCO - MARA among financial gainers ATCO leads losers December, 16 2020 01:25 PM Atlas Corp. Gainers: Marathon Patent Group (MARA) +20%. HF Enterprises (HFEN) +16%. C3.ai (AI) +12%.Losers: Atlas (ATCO) -9%. Impac Mortgage Holdings (IMH) -7%. Donnelley Financial Solutions (DFIN) -6%. Harvest Capital Credit (HCAP) -6%. For further details see: MARA among financial gainers, ATCO leads losers