ArcelorMittal
MT- Exchange
- NYSE
- Industry
- Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens)
- SEC CIK
- 0001243429
No open-market purchases or sales by ArcelorMittal insiders were filed in the last 90 days; 318 institutions reported holding it in 13F filings for Q2 2026, worth $2.25B in total; no superinvestor holds it.
Holders of 5% or more of MT
Holders whose latest Schedule 13D or 13G filing reports 5% or more of ArcelorMittal, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Lumen Investments S.A R.L. | 13D/A | 44.70%340.2M shares | – | Mar 19, 20261 filing | Mar 19, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
1 Schedule 13D or 13G filing on ArcelorMittal, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 19, 20264:34 PM ET | Lumen Investments S.A R.L.and 5 others | 13D/A | 44.70%340.2M shares | – | Mar 5, 2026 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell ArcelorMittal shares.
No Form 144 notices for ArcelorMittal are on file.