Business Insight & People News
Primary Production of Aluminum
Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.
Revenue and net income below are for fiscal period FY2025, the period label carried by this company’s own annual XBRL filings to the SEC. Fiscal years do not line up between companies — one company’s FY2026 can cover much the same months as another’s FY2025 — so compare the periods, not just the numbers.
Headcount comes from Yahoo Finance, not from a filing. The date beside it is the day we retrieved the figure — it is not the date the company counted its staff, and Yahoo does not publish that date. Unlike the SEC filings behind the other figures on this page, this one carries no open licence, so we publish the number and nothing else from that source.
Everyone below has filed at least one insider report against this company.
Value is that share count priced at the same closing price used everywhere else on this site. A row priced from only some of a person’s securities says so — we do not quietly present a partial sum as a complete one.
The role comes from the relationship boxes a person ticks on their own insider filings — officer, director, ten per cent owner — not from anything we infer. Somebody who is both an officer and a director appears once, in the combined group, so the row count still matches the figure at the top of this page. Where no filing states a role we say so instead of guessing one.
| Insider | Reported role | Shares | Value | Last action |
|---|---|---|---|---|
| Officers 8 | ||||
| Gunnar Gudlaugsson | EVP | 136,393 | $6.38M | S Open-market sale Feb 25, 2026 position reported |
| Gerald C Bialek | CFO | 100,620 | $4.71M | A Grant or award Jan 1, 2025 position reported |
| John DeZee | General Counsel | 97,647 | $4.57M | S Open-market sale Feb 23, 2026 position reported |
| Matt Aboud | SVP | 64,843 | $3.03M | S Open-market sale Mar 3, 2026 position reported |
| Peter A Trpkovski | CFO | 64,125 | $3.00M | S Open-market sale Mar 25, 2026 position reported |
| Robert F Hoffman | Chief Accounting Officer | 56,658 | $2.65M | S Open-market sale Mar 11, 2026 position reported |
| Agust F Hafberg | SVP | 45,059 | $2.11M | S Open-market sale Feb 27, 2026 position reported |
| Kenneth L Calloway | SVP | 24,902 | $1.16M | S Open-market sale Mar 12, 2026 position reported |
| Officers who also sit on the board 2 | ||||
| Jesse E Gary | CEO | 419,807 | $19.64M | S Open-market sale Mar 16, 2026 position reported |
| Jennifer Mary Bush | President | 46,872 | $2.19M | A Grant or award Jun 15, 2026 position reported |
| Directors 4 | ||||
| Jarl Berntzen | Board Member | 208,951 | $9.77M | A Grant or award Jun 15, 2026 position reported |
| Errol Glasser | Board Member | 118,697 | $5.55M | A Grant or award Jun 15, 2026 position reported |
| Andrew G Michelmore | Board Member | 89,089 | $4.17M | F Shares withheld for taxes Jun 15, 2026 position reported |
| Tamla A Olivier | Board Member | 29,673 | $1.39M | A Grant or award Jun 15, 2026 position reported |
The rest — awards, shares withheld to pay tax, option exercises, gifts and so on — follow from an employment contract or a transfer arranged off-market, not from a decision to buy or sell, so counting them would turn this into a pay table.
A price of 0.00 is a real reported figure on gifts (G) and share awards (A) — not a gap in our data.
| Date | Insider | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|
| Jun 15, 2026 | Jarl Berntzen | A Grant or award | 2,172 | $0.00 | $0 | SEC filing ↗ |
| Jun 15, 2026 | Errol Glasser | A Grant or award | 2,172 | $0.00 | $0 | SEC filing ↗ |
| Jun 15, 2026 | Andrew G Michelmore | F Shares withheld for taxes | 652 | $54.55 | $35.6K | SEC filing ↗ |
| Jun 15, 2026 | Andrew G Michelmore | A Grant or award | 2,172 | $0.00 | $0 | SEC filing ↗ |
| Jun 15, 2026 | Jennifer Mary Bush | A Grant or award | 2,172 | $0.00 | $0 | SEC filing ↗ |
| Jun 15, 2026 | Tamla A Olivier | A Grant or award | 2,172 | $0.00 | $0 | SEC filing ↗ |
| Mar 25, 2026 | Peter A Trpkovski | S Open-market sale | 16,739 | $50.51 | $845.5K | SEC filing ↗ |
| Mar 16, 2026 | Jesse E Gary | S Open-market sale | 150,000 | $55.47 | $8.32M | SEC filing ↗ |
| Mar 12, 2026 | Kenneth L Calloway | S Open-market sale | 18,000 | $58.00 | $1.04M | SEC filing ↗ |
| Mar 11, 2026 | Robert F Hoffman | S Open-market sale | 10,529 | $56.51 | $595.0K | SEC filing ↗ |
| Mar 4, 2026 | Robert F Hoffman | S Open-market sale | 10,000 | $56.33 | $563.3K | SEC filing ↗ |
| Mar 3, 2026 | Matt Aboud | S Open-market sale | 2,971 | $52.67 | $156.5K | SEC filing ↗ |
| Mar 2, 2026 | Matt Aboud | S Open-market sale | 12,126 | $52.50 | $636.6K | SEC filing ↗ |
| Feb 27, 2026 | Agust F Hafberg | S Open-market sale | 22,884 | $51.24 | $1.17M | SEC filing ↗ |
| Feb 25, 2026 | Gunnar Gudlaugsson | S Open-market sale | 43,000 | $54.10 | $2.33M | SEC filing ↗ |
| Feb 23, 2026 | John DeZee | S Open-market sale | 66,000 | $50.72 | $3.35M | SEC filing ↗ |
| Feb 9, 2026 | Peter A Trpkovski | F Shares withheld for taxes | 4,240 | $54.36 | $230.5K | SEC filing ↗ |
| Jan 23, 2026 | Jesse E Gary | S Open-market sale | 150,000 | $48.19 | $7.23M | SEC filing ↗ |
| Jan 12, 2026 | Jesse E Gary | G Bona fide gift | 314,611 | $0.00 | $0 | SEC filing ↗ |
| Jan 12, 2026 | Jesse E Gary | G Bona fide gift | 314,611 | $0.00 | $0 | SEC filing ↗ |
| Jan 1, 2026 | Agust F Hafberg | A Grant or award | 5,238 | $0.00 | $0 | SEC filing ↗ |
| Jan 1, 2026 | Kenneth L Calloway | A Grant or award | 5,238 | $0.00 | $0 | SEC filing ↗ |
| Jan 1, 2026 | Peter A Trpkovski | A Grant or award | 13,488 | $0.00 | $0 | SEC filing ↗ |
| Jan 1, 2026 | Matt Aboud | A Grant or award | 5,529 | $0.00 | $0 | SEC filing ↗ |
| Jan 1, 2026 | Robert F Hoffman | A Grant or award | 5,122 | $0.00 | $0 | SEC filing ↗ |
From SEC Form 4 filings. Every row links to the filing it came from. How we calculate this.
The report an officer, director or large shareholder must file after trading their own company’s stock.
Funds, trusts and other companies file the same ownership forms that executives do. Everything below is taken from those filings, with the position exactly as the filing states it.
Do not add these figures together. 3 of the positions below were reported on filings shared by several filers at once.
On a joint filing every named filer is listed against the whole position, so the same block of stock appears under each name. Those rows are marked joint.
| Owner | Reported role | Shares | Filed |
|---|---|---|---|
| Glencore AG | TenPercentOwner | 12,184,755 joint | |
| GLENCORE INTERNATIONAL AG | Director,TenPercentOwner | 12,184,755 joint | |
| Glencore plc | Director,TenPercentOwner | 12,184,755 joint |
See the full ownership map — every entity that files as an owner of a US public company.
31 legal entities named in the subsidiary exhibit filed with this company’s most recent 10-K. . Filing on SEC.gov.
This is not the full list. SEC rules only require a company to name its significant subsidiaries.
Smaller entities are left out of the exhibit entirely. A short list here means a short exhibit — it does not mean the company owns nothing else. Nothing on this page is inferred: every name below is copied from the filing.
| Subsidiary | Organised in |
|---|---|
| Century Aluminium Congo, S.A. | — |
| Century Aluminum Development LLC | — |
| Century Aluminum Holdings, LLC | — |
| Century Aluminum Jamaica Holdings, Inc. | — |
| Century Aluminum of Kentucky General Partnership | Century Aluminum of Kentucky, GP |
| Century Aluminum of Kentucky LLC | — |
| Century Aluminum of South Carolina, Inc. | — |
| Century Aluminum of West Virginia, Inc. | — |
| Century Aluminum Sebree LLC | — |
| Century Aluminum Trading Company | — |
| Century Aluminum Vlissingen B.V. | — |
| Century California LLC | — |
| Century Kentucky, Inc. | — |
| Century Louisiana, Inc. | — |
| Century Marketer LLC | — |
| Century Netherlands I Limited | — |
| Century Netherlands II Limited | — |
| Company Name | Name Under Business is Conducted |
| General Alumina Holdings Limited | — |
| General Alumina Jamaica Inc. | — |
| General Alumina Jamaica Limited | — |
| Hancock Aluminum LLC | — |
| Metalsco, LLC | — |
| Mt. Holly Commerce Park, LLC | — |
| Norðurál ehf. | — |
| Norðurál Grundartangi ehf. | — |
| Nordural Holdings C.V. | — |
| Nordural U.S. LLC | — |
| NSA General Partnership | NSA GP |
| Skyliner, LLC | — |
| Virgin Islands Alumina Corporation LLC | — |
A subsidiary is a separate legal entity this company controls; it is not the same thing as a brand, a division or an office. These entities do not file with the SEC in their own right, so there is no separate page to open for them.
Think a number here is wrong? Open the linked filing and compare — how to report it.
Every figure on this page comes from filings to the U.S. SEC via EDGAR. Nothing here is estimated, and nothing is taken from press coverage or company websites.
Share count: cover page of the latest filing (dei:EntityCommonStockSharesOutstanding), taken from
CENTURY ALUMINUM CO’s own filings and multiplied by our closing price.
Full method.
the share count the company itself prints on the cover of its most recent filing, as of the date it signed that filing.
We do not take a market cap from a data vendor, and we do not estimate one: the figure is a share count from CENTURY ALUMINUM CO’s own SEC filings multiplied by the closing price we hold for the same stock.