Derivative exercise or conversion — not an open-market buy.
Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell
View the official recordSEC Form 4 — Statement of Changes in Beneficial OwnershipAll the details
Dates, kept separate
Transaction date
Nov 10, 2025
Reporting period
Not applicable
Filed with the SEC
Nov 14, 2025
10% ownerIndirect holdingOption exercise
Context
Classification
option exercise
Code C — exercise or conversion of a derivative security
Planned / mechanical clue
None found in footnotes
Only flagged when a footnote says so; never inferred
Source receipt
Record ID
0001104659-25-111519
Filed / recorded
Nov 14, 2025, 3:59 AM UTC
Added to OQRO
Oct 6, 2026, 10:14 PM UTC
Parser
form4-xml-v2
Data quality
Verified: identifiers matched exactly
Issuer
CENTURY ALUMINUM CO
Issuer CIK
949157
Ticker
CENX
Reporting person
GLENCORE INTERNATIONAL AG
Relationship
10% owner
Security
Common Stock
Table
Non-derivative (Table I)
Transaction date
Nov 10, 2025
Transaction code
C
Shares / units
4,948,591
Acquired / disposed
Acquired (A)
Shares owned after
17,505,947
Ownership form
Indirect — See Footnote
Amendment
No
Footnotes from the filing
Represents shares of Common Stock acquired upon the automatic conversion of 49,485.91 shares of Series A Convertible Preferred Stock upon the consummation of the transaction reported in Line 1 of Table 1.
Each share of Series A Convertible Preferred Stock is convertible into 100 shares of Common Stock at the times and under the circumstances described in the Certificate of Designation for the Series A Convertible Preferred Stock. The Series A Convertible Preferred Stock was acquired on July 8, 2008 and has no expiration date.
The shares of Common Stock reported in Line 2 of Table I and the shares of Series A Convertible Preferred Stock reported in Table II are held directly by Glencore AG, a direct wholly-owned subsidiary of Glencore International AG, and may be deemed to be indirectly beneficially owned by Glencore International AG. The Common Stock reported on Line 1 of Table I is held directly by Glencore International AG. Glencore International AG is wholly-owned by Glencore plc, which may be deemed an indirect beneficial owner of the securities held by Glencore AG and Glencore International AG.