X0306 4 2021-02-03 0000024741 CORNING INC /NY GLW 0001206158 WEEKS WENDELL P ONE RIVERFRONT PLAZA CORNING NY 14831 1 1 Chairman and CEO Common Stock 2021-02-03 4 M 0 4284 0 A 4284 D Common Stock 2021-02-03 4 F 0 4284 36.34 D 0 D Common Stock 726847 I By Trust Common Stock 6372.1524 I Held By Wife - Emp. Ben. Plan Common Stock 9200 I Held By Wife - In Trust Common Stock 10502.0657 I Trustee U/employee Benefit Plan Performance Share Unit 2021-02-03 4 A 0 113115 0 A Common Stock 113115 113115 D Performance Share Unit 2021-02-03 4 A 0 124668 0 A Common Stock 124668 124668 D Performance Share Unit 2021-02-03 4 M 0 4284 0 D Common Stock 4284 120384 D Each Performance Share Unit represents a contingent right to receive one share of GLW common stock. The Reporting Person disclaims beneficial ownership of all securities held by spouse. The Reporting Person disclaims beneficial ownership of all securities held by wife. Performance Share Units were earned February 3, 2021 per Compensation Committee decision that performance criteria were satisfied for fiscal year 2020 pursuant to the May 2020 agreement. Earned units remain restricted until vesting. The earned units will vest ratably over 3 years from the grant date and convert to GLW common stock, subject to service-based vesting requirement. Performance Share Units were earned February 3, 2021 per Compensation Committee decision that performance criteria were satisfied for fiscal year 2020 pursuant to the April 2020 agreement. Earned units remain restricted until April 14, 2023, when they vest and convert to GLW common stock, subject to service-based vesting requirement. Vesting to satisfy tax requirement pursuant to the April 2020 agreement. Linda E. Jolly, Power of Attorney 2021-02-05