Comcast Corp. (CMCSA)

Comcast Corp., operating profit margin, long-term trends, calculation

	Operating Profit Margin	=	100	×	Operating income1	÷	Revenue1
Dec 31, 2005		=	100	×		÷
Dec 31, 2006		=	100	×		÷
Dec 31, 2007		=	100	×		÷
Dec 31, 2008		=	100	×		÷
Dec 31, 2009		=	100	×		÷
Dec 31, 2010		=	100	×		÷
Dec 31, 2011		=	100	×		÷
Dec 31, 2012		=	100	×		÷
Dec 31, 2013		=	100	×		÷
Dec 31, 2014		=	100	×		÷
Dec 31, 2015		=	100	×		÷
Dec 31, 2016		=	100	×		÷
Dec 31, 2017		=	100	×		÷
Dec 31, 2018		=	100	×		÷

Based on: 10-K (filing date: 2006-02-22), 10-K (filing date: 2007-02-26), 10-K (filing date: 2008-02-20), 10-K (filing date: 2009-02-20), 10-K (filing date: 2010-02-23), 10-K (filing date: 2011-02-25), 10-K (filing date: 2012-02-23), 10-K (filing date: 2013-02-21), 10-K (filing date: 2014-02-12), 10-K (filing date: 2015-02-27), 10-K (filing date: 2016-02-05), 10-K (filing date: 2017-02-03), 10-K (filing date: 2018-01-31), 10-K (filing date: 2019-01-31).

¹ USD $ in millions

Comcast Corp., operating profit margin, long-term trends, comparison to competitors

	Comcast Corp.	Charter Communications Inc.
Dec 31, 2005
Dec 31, 2006
Dec 31, 2007
Dec 31, 2008
Dec 31, 2009
Dec 31, 2010
Dec 31, 2011
Dec 31, 2012
Dec 31, 2013
Dec 31, 2014
Dec 31, 2015
Dec 31, 2016
Dec 31, 2017
Dec 31, 2018

Based on: 10-K (filing date: 2006-02-22), 10-K (filing date: 2007-02-26), 10-K (filing date: 2008-02-20), 10-K (filing date: 2009-02-20), 10-K (filing date: 2010-02-23), 10-K (filing date: 2011-02-25), 10-K (filing date: 2012-02-23), 10-K (filing date: 2013-02-21), 10-K (filing date: 2014-02-12), 10-K (filing date: 2015-02-27), 10-K (filing date: 2016-02-05), 10-K (filing date: 2017-02-03), 10-K (filing date: 2018-01-31), 10-K (filing date: 2019-01-31).