X0306 4 2016-12-09 0 0001370946 Owens Corning OC 0001228309 THAMAN MICHAEL H ONE OWENS CORNING PARKWAY TOLEDO OH 43659 1 1 0 0 Chairman, President and CEO $.01 Par Value Common 2016-12-05 4 G 0 43615 0.00 D 693650.67 D $.01 Par Value Common 2016-12-09 4 M 0 104310 13.89 A 797960.67 D $.01 Par Value Common 2016-12-09 4 S 0 104310 55.87 D 693650.67 D $.01 Par Value Common 2016-12-12 4 M 0 90913 13.89 A 784563.67 D $.01 Par Value Common 2016-12-12 4 S 0 90913 55.14 D 693650.67 D $.01 Par Value Common 2016-12-13 4 M 0 31177 13.89 A 724827.67 D $.01 Par Value Common 2016-12-13 4 S 0 31177 55.30 D 693650.67 D Option (right to purchase) 13.89 2016-12-09 4 M 0 104310 0.00 D 2013-02-04 2019-02-04 $.01 Par Value Common 104310 122090 D Option (right to purchase) 13.89 2016-12-12 4 M 0 90913 0.00 D 2013-02-04 2019-02-04 $.01 Par Value Common 90913 31177 D Option (right to purchase) 13.89 2016-12-13 4 M 0 31177 0.00 D 2013-02-04 2019-02-04 $.01 Par Value Common 31177 0 D The $55.87 price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $55.49-$56.11, inclusive. The Reporting Person undertakes to provide to Owens Corning, any security holder of Owens Corning, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The $55.14 price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $54.82-$55.68, inclusive. The Reporting Person undertakes to provide to Owens Corning, any security holder of Owens Corning, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The $55.30 price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $55.03-$55.64, inclusive. The Reporting Person undertakes to provide to Owens Corning, any security holder of Owens Corning, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. /s/ Raj B. Dave, Attorney-in-fact 2016-12-13