X0508 4 2023-12-15 0001732845 WestRock Co WRK 0001464827 O'Neal John L 1000 ABERNATHY ROAD NE SUITE 125 ATLANTA GA 30328 0 1 0 0 President, Global Paper 0 Common Stock 2023-12-15 4 F 0 2083 42.54 D 56435 D Reflects shares withheld upon accelerated vesting of outstanding time-based restricted stock units ("RSUs"). RSUs were accelerated from February 2024 to December 15, 2023 in order to mitigate impacts that could arise under Sections 280G and 4999 of the Internal Revenue Code of 1986, as amended. The Reporting Person has signed a letter agreement providing that such accelerated RSUs are subject to certain repayment conditions. Includes dividend equivalents exempt from Section 16 that were credited since the filing of the Reporting Person's most recent Form 4. Steph W. Bignon (attorney-in-fact pursuant to power of attorney previously filed with the SEC) 2023-12-19