X0306 4/A 2022-02-03 2022-02-04 0 0001370946 Owens Corning OC 0001738909 Sandri Marcio A ONE OWENS CORNING PARKWAY TOLEDO OH 43659 0 1 0 0 President, Composites $.01 Par Value Common 2022-02-03 4 A 0 8295 0.00 A 46419.213 D The Form 4 filed on 2/4/22 correctly reported the tax withholding obligations on deferred receipt of performance share units, but did not accurately report shares awarded in connection with the deferred receipt of performance share units for the performance cycle ended December 31, 2021. /s/Jeffrey S. Wilke, Attorney-in-Fact 2022-02-18