X0306 4/A 2021-05-25 2021-05-27 0001579241 Allegion plc ALLE 0001589039 Eckersley Timothy P C/O SCHLAGE LOCK COMPANY LLC 11819 N. PENNSYLVANIA STREET CARMEL IN 46032 1 Sr. VP-Allegion International Ordinary Shares 2021-05-25 4 M 0 3496 57.85 A 37534.907 D Ordinary Shares 2021-05-25 4 S 0 3496 139.99 D 34038.907 D Ordinary Shares 2021-05-25 4 M 0 1896 54.125 A 35934.907 D Ordinary Shares 2021-05-25 4 S 0 1896 139.49 D 34038.907 D Stock Option (Right to Buy) 57.85 2021-05-25 4 M 0 3496 0 D 2025-02-20 Ordinary Shares 3496 3496 D Stock Option (Right to Buy) 54.125 2021-05-25 4 M 0 1896 0 D 2024-03-11 Ordinary Shares 1896 0 D This transaction was executed in multiple sales all at $139.99 per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or any security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected regarding this footnote. This transaction was executed in multiple sales all at $139.49 per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or any security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected regarding this footnote. A stock option that vested in equal annual installments on February 20, 2016, February 20, 2017 and February 20, 2018, and is exercisable. A stock option that vested in equal annual installments on March 11, 2015, March 11, 2016 and March 11, 2017, and is exercisable. This Form 4/A amends and restates the original Form 4 filed on May 27, 2021 which inadvertently omitted, due to administrative error, the exercise of stock options granted on February 20, 2015. /s/ Hatsuki Miyata, Attorney-In-Fact 2021-06-02