Jesse E. Gary - 16 Mar 2026 Form 4 Insider Report for CENTURY ALUMINUM CO (CENX)

Reporting relationship: President and CEO, Director
Issuer ticker: CENX
Reported as of: 16 Mar 2026
Net transaction value: -$8,320,500
SEC form: 4
Accepted by SEC: 17 Mar 2026, 17:35:40 UTC
Prior SEC filing: 23 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Paul Sharobeem, attorney-in-fact for Jesse E. Gary

Key filing fact

Jesse E. Gary filed Form 4 for CENTURY ALUMINUM CO (CENX) on 17 Mar 2026.

Key facts

This page summarizes Jesse E. Gary's Form 4 filing for CENTURY ALUMINUM CO (CENX).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 17 Mar 2026, 17:35.

Change

Previous filing in this sequence was filed on 23 Jan 2026.
Current net transaction value: -$8,320,500.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001568817 Primary reporting owner

Gary Jesse E

Relationship: President and CEO, Director
Address: C/O CENTURY ALUMINUM COMPANY, 1 S. WACKER DRIVE, SUITE 1000, CHICAGO
Signature: /s/ Paul Sharobeem, attorney-in-fact for Jesse E. Gary
Signature date: 17 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CENX transaction

Common Stock

Sale

Transaction value: $8,320,500
Shares: -150,000
Change %: -51%
Price: $55.47
Shares after: 142,580
Date: 16 Mar 2026
Ownership: By Trust
Footnotes: F1, F2, F3

CENX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 277,227
Date: 16 Mar 2026
Ownership: Direct
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 4 footnotes

Footnote F1

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 20, 2025 (the 'Trading Plan'). There are no additional shares available for sale under the Trading Plan and, as such, the Trading Plan is now complete.

Footnote F2

The price reported above reflects the weighted average sale price for the shares which were sold in multiple transactions at prices ranging from $54.08 to $56.80, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the specific number of shares and prices at which the transactions were effected.

Footnote F3

Shares held in a self-settled, revocable trust for which the Reporting Person serves as trustee.

Footnote F4

Includes unvested RSUs granted to the Reporting Person under the Issuer's Long-Term Incentive Plans.