ArcelorMittal
MTNYSEMaterials · Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens) · SEC filings ↗ · Compare ⊕
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SEC XBRL · annualNo structured XBRL financials available (common for pre-2009 filers, foreign issuers, or companies that never reported as a US public company).
5%+ owners
SEC Schedule 13D / 13G · last 3 yrs- Lumen Investments S.A R.L.Activist (13D)Mar 19, 2026
Holders who disclosed a 5%+ stake. 13D signals intent to influence or control; 13G is a passive holding. Latest filing per holder — open it for the exact stake.
Short interest
FINRA · bi-monthly| Settlement | Shares short | Days to cover | Δ vs prior |
|---|---|---|---|
| May 15, 2026 | 3.5M | 1.9 | +28.9% |
| Apr 30, 2026 | 2.7M | 1.7 | +11.4% |
| Apr 15, 2026 | 2.5M | 1.5 | -17.0% |
| Mar 31, 2026 | 3.0M | 1.5 | -3.8% |
| Mar 13, 2026 | 3.1M | 1.4 | +8.4% |
Shares sold short as reported to FINRA. Days-to-cover = short shares ÷ average daily volume — higher means more potential squeeze pressure.
Recent SEC filings
All filings ↗- SDMay 28, 2026
- 6-KMay 27, 2026
- 6-KMay 19, 2026
- 6-KFORM 6-KMay 19, 2026
- 6-KMay 14, 2026
- 424B5May 13, 2026
- 6-KFORM 6-KMay 13, 2026
- 6-KFORM 6-KMay 13, 2026
- FWPMay 12, 2026
- 424B5May 12, 2026
- 6-KCURRENT REPORT OF FOREIGN ISSUERMay 12, 2026
- 6-KMay 6, 2026
- 6-KApr 30, 2026
- 6-KApr 23, 2026
- 6-KApr 3, 2026