exhibit 10. 19 exhibit 10. 19 amendment no. 3 to the shareholders ’ agreement this amendment no. 3 ( this amendment ) to the shareholders ’ agreement dated 21 november 2016, between saudi aramco and rowan, as amended on 18 december 2017 and 28 june 2018 ( the agreement ) is made and entered into on 13 august 2020 among : ( 1 ) rowan rex limited, a limited company duly organized and existing under the laws of the british overseas territory of the cayman islands ( rowan ) ; rowan rex limited ( 2 ) mukamala oil field services limited ( as successor to saudi aramco development company ( saudi aramco ) ), a limited liability company incorporated and registered in the kingdom of saudi arabia, holding commercial registration certificate number # # # - # # # - # # # # dated 20 / 09 / 1439h, with a registered capital of sar 1, 729, 307, 480 and having its principal office at dhahran, kingdom of saudi arabia ( mukamala ) ; and mukamala oil field services limited ( 3 ) saudi aramco rowan offshore drilling company, a limited liability company organised under the laws and regulations of the kingdom of saudi arabia, holding commercial registration certificate number 2051064243 dated 20 / 08 / 1438h, with a registered capital of sar 187, 500, 000 and having its principal office at al - khobar, kingdom of saudi arabia ( the company ) ; saudi aramco rowan offshore drilling company ( each a party and together the parties ). whereas : ( a ) saudi aramco and rowan, as the shareholders, entered into the agreement, dated 21 november 2016, which was later amended on 18 december 2017 and 28 june 2018 ; saudi aramco and rowan, as the shareholders, entered into the agreement, dated 21 november 2016, which was later amended on 18 december 2017 and 28 june 2018 ; ( b ) the company acceded to the agreement on 25 may 2017 ; the company acceded to the agreement on 25 may 2017 ; ( c ) saudi aramco transferred its shareholder instruments to mukamala on 28 june 2018 and each of saudi aramco, rowan, mukamala and the company executed a novation agreement on such date in connection therewith ; saudi aramco transferred its shareholder instruments to mukamala on 28 june 2018 and each of saudi aramco, rowan, mukamala and the company executed a novation agreement on such date