Notice to ASX/LSE Shareholdings of persons discharging managerial responsibility (PDMR) / Key Management Personnel (KMP) 6 December 2023 As part of its dual listed company structure, Rio Tinto notifies dealings in Rio Tinto plc and Rio Tinto Limited securities by PDMRs / KMPs to both the Australian Securities Exchange (ASX) and the London Stock Exchange (LSE). Bonus Deferral Awards (“BDA”) granted under the Rio Tinto 2018 Equity Incentive Plan 50% of the annual bonuses of the participating executives are delivered as BDA in the form of deferred ordinary shares of Rio Tinto plc or Rio Tinto Limited (“shares”), as applicable. The BDA vests in December of the third year after the end of the performance year to which the annual bonus relates. On 1 December 2023, the following PDMR / KMP received their vested BDA in the form of shares, of which sufficient were sold to pay applicable withholding tax and other deductions. Security Name of PDMR / KMP Conditional Awards Granted Number of shares vested* Number of shares sold Price per share sold Number of shares retained Rio Tinto plc Shares Baatar, Bold 6,583 8,158 3,735 GBP 55.565765 4,423 Rio Tinto plc Shares Barrios, Alfredo 7,497 9,291 1,824 GBP 55.565765 7,467 Rio Tinto plc Shares Cunningham, Peter 1,402 1,737 796 GBP 55.565765 941 Rio Tinto Limited shares Kaufman, Sinead 1,408 1,677 793 AUD 124.6944 884 Rio Tinto plc shares Stausholm, Jakob 9,680 11,996 3,868 GBP 55.565765 8,128 Rio Tinto plc shares Trott, Simon 6,392 7,921 1,852 GBP 55.565765 6,069 *The number of awards vested includes additional shares calculated to reflect dividends declared during the vesting period on the original shares granted. LEI: 213800YOEO5OQ72G2R82 Classification: 3.1. Information disclosed under article 19 of the Market Abuse Regulation. EXHIBIT 99.10

Notice to ASX/LSE 2 / 2 Contacts Please direct all enquiries to media.enquiries@riotinto.com Media Relations, United Kingdom Matthew Klar M +44 7796 630 637 David Outhwaite M +44 7787 597 493 Media Relations, Australia Matt Chambers M +61 433 525 739 Jesse Riseborough M +61 436 653 412 Alyesha Anderson M +61 434 868 118 Michelle Lee M +61 458 609 322 Media Relations, Americas Simon Letendre M +1 514 796 4973 Malika Cherry M +1 418 592 7293 Vanessa Damha M +1 514 715 2152 Investor Relations, United Kingdom Menno Sanderse M +44 7825 195 178 David Ovington M +44 7920 010 978 Laura Brooks M +44 7826 942 797 Investor Relations, Australia Tom Gallop M +61 439 353 948 Amar Jambaa M +61 472 865 948 Rio Tinto plc 6 St James’s Square London SW1Y 4AD United Kingdom T +44 20 7781 2000 Registered in England No. 719885 Rio Tinto Limited Level 43, 120 Collins Street Melbourne 3000 Australia T +61 3 9283 3333 Registered in Australia ABN 96 004 458 404 This announcement is authorised for release to the market by Andy Hodges, Rio Tinto’s Group Company Secretary. riotinto.com