SCHEDULE 13D/A

ArcelorMittal

Ordinary Shares · CUSIP: 03938L104

Event date: 2026-03-05

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• LUMEN INVESTMENTS S.A R.L.Reported CIK 0001566817

  Shares: 275,840,595.00 · Class: 36.2%

• Lakshmi N. Mittal

  Shares: 340,152,563.00 · Class: 44.7%

• Usha Mittal

  Shares: 339,524,443.00 · Class: 44.6%

• Grandel Pte. Ltd.

  Shares: 339,498,943.00 · Class: 44.6%

• Nuavam Investments S.a r.l.

  Shares: 63,658,348.00 · Class: 8.4%

• HSBC Trustee (C.I.) Limited, as trustee of the Platinum Trust

  Shares: 339,498,943.00 · Class: 44.6%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.