# EDGAR Filing Document

**Accession Number:** 0000949157
**File Stem:** 0001628280-25-042823
**Filing Date:** 2025-9
**Character Count:** 38539
**Document Hash:** 1885368a0704f2dd0724e40b9f397a25
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-25-042823.hdr.sgml**: 20250925

**ACCESSION NUMBER**: 0001628280-25-042823

**CONFORMED SUBMISSION TYPE**: SD

**PUBLIC DOCUMENT COUNT**: 14

**FILED AS OF DATE**: 20250925

**DATE AS OF CHANGE**: 20250925

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CENTURY ALUMINUM CO
- **CENTRAL INDEX KEY:** 0000949157
- **STANDARD INDUSTRIAL CLASSIFICATION:** PRIMARY PRODUCTION OF ALUMINUM [3334]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 133070826
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SD
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34474
- **FILM NUMBER:** 251344307

**BUSINESS ADDRESS:**
- **STREET 1:** 1 SOUTH WACKER DRIVE
- **STREET 2:** SUITE 1000
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 3126963101

**MAIL ADDRESS:**
- **STREET 1:** 1 SOUTH WACKER DRIVE
- **STREET 2:** SUITE 1000
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM SD**

**SPECIALIZED DISCLOSURE REPORT**

![centuryheaderlogoa49.jpg](cenx-20241231_g1.jpg)

**Century Aluminum Company**

**(Exact name of the registrant as specified in its charter)**

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-34474** | **13-3070826** |
| (State or other jurisdiction of incorporation or organization) | (Commission File<br>Number) | (IRS Employer Identification No.) |
| **One South Wacker Drive** | | **60606** |
| **Suite 1000** | | (Zip Code) |
| **Chicago, Illinois** | | |
| (Address of principal executive offices) | | |

---

**Peter Trpkovski**

**(312) 696-3112**

(Name and telephone number, including area code,

of the person to contact in connection with this report.)

Check the appropriate box to indicate the rule pursuant to which this Form is being submitted, and provide the period to which the information in this Form applies:

☐ Rule 13p-1 under the Securities Exchange Act (17 CFR 240.13p-1) for the reporting period from January 1 to December 31, __________.

☒☐ Rule 13q-1 under the Securities Exchange Act (17 CFR 240.13q-1) for the fiscal year ended December 31, 2024.

------

**Section 1. Conflict Minerals Disclosure**

**Item 1.01 - Conflict Minerals Disclosure and Report**

Not applicable

**Item 1.02 - Exhibit**

Not applicable

**Section 2. Resource Extraction Issuer Disclosure**

**Item 2.01 - Resource Extraction Issuer Disclosure and Report**

*Disclosure of Payments by Resource Extraction Issuers*

The specified payment disclosure required by this Form is included as Exhibit 2.01 to this Specialized Disclosure Report on Form SD.

**Section 3. Exhibits**

**Item 3.01 - Exhibits**

The following exhibits are filed as part of this Form SD.

---

| | |
|:---|:---|
| **Exhibit No.** | **Description** |
| <u>[99.1](cenx-20241231.htm)</u> | <u>[Resource Extraction Payment Report as required by Item 2.01 of this Form.](cenx-20241231.htm)</u> |

---

------

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the duly authorized undersigned.

---

| | | |
|:---|:---|:---|
| | **Century Aluminum Company** | |
| By: | /s/ PETER TRPKOVSKI | September 26, 2025 |
|  | Name: Peter Trpkovski | (Date) |
|  | Title: Executive Vice President, Chief Financial Officer and Treasurer |  |

---

## Exhibit 2.01

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```

## Exhibit 2.01

```

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</xs:schema>
</XBRL>

```

## Exhibit 99.1

**Exhibit 2.01**

**Century Aluminum Company**

**Resource Extraction Payment Report**

**for the fiscal year ended December 31, 2024**

**Currency of Report: United States Dollar (USD)**

**Government-level disclosure**

The table below sets forth our payments made to the Government of Jamaica for the fiscal year ended December 31, 2024, by type of payment. The Government of Jamaica is the only government that received payments.

---

| | |
|:---|:---|
| **For the year ended December 31, 2024** | **For the year ended December 31, 2024** |
| **(USD in millions)** | **(USD in millions)** |
| | **Government of Jamaica** |
| Taxes | $— |
| Royalties | 2.3 |
| Fees |  |
| Production Entitlements |  |
| Bonuses |  |
| Dividends |  |
| Infrastructure Improvements |  |
| Community and Social Responsibility |  |
| Total | $2.3 |

---

**Project-level disclosure**

The table below sets forth the details of our payments made to the Government of Jamaica for the fiscal year ended December 31, 2024, by type of payment, presented at the entity level. All payments relate to the open pit mining of bauxite.

---

| | | |
|:---|:---|:---|
| **For the year ended December 31, 2024** | **For the year ended December 31, 2024** | **For the year ended December 31, 2024** |
| **(USD in millions)** | **(USD in millions)** | **(USD in millions)** |
| | **Jamalco**<sup>(1)</sup> | **Total** |
| Taxes | $— | $— |
| Royalties<sup>(2)</sup> | 2.3 | 2.3 |
| Fees |  |  |
| Production Entitlements |  |  |
| Bonuses |  |  |
| Dividends |  |  |
| Infrastructure Improvements |  |  |
| Community and Social Responsibility |  |  |
| Total | $2.3 | $2.3 |

---

(1)This disclosure has been done at an entity level as this is the lowest level of disaggregation used for payments. Jamalco is our only entity that makes payments to the Government of Jamaica

(2)Royalty payments owed to the Government of Jamaica are calculated based on the alumina produced at the refinery.

------

**Payment details disclosure**

The table below provides the details of payments made to the Government of Jamaica for the fiscal year ended December 31, 2024. All payments relate to our one reportable business segment.

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **For the year ended December 31, 2024** | **For the year ended December 31, 2024** | **For the year ended December 31, 2024** | **For the year ended December 31, 2024** | **For the year ended December 31, 2024** | **For the year ended December 31, 2024** | **For the year ended December 31, 2024** | **For the year ended December 31, 2024** | **For the year ended December 31, 2024** |
| **(USD in millions)** | **(USD in millions)** | **(USD in millions)** | **(USD in millions)** | **(USD in millions)** | **(USD in millions)** | **(USD in millions)** | **(USD in millions)** | **(USD in millions)** |
| | **Country** | **Government** | **Subnational Jurisdiction/Project**<sup>(1)</sup> | **Resource** | **Segment** | **Extraction Method** | **Payment Type** | **Payment Amount** |
| 1 | Jamaica | Government of Jamaica | n/a | Bauxite | Aluminum | Open Pit | Royalties | $0.3 |
| 2 | Jamaica | Government of Jamaica | n/a | Bauxite | Aluminum | Open Pit | Royalties | 1.0 |
| 3 | Jamaica | Government of Jamaica | n/a | Bauxite | Aluminum | Open Pit | Royalties | 0.3 |
| 4 | Jamaica | Government of Jamaica | n/a | Bauxite | Aluminum | Open Pit | Royalties | 0.4 |
| 5 | Jamaica | Government of Jamaica | n/a | Bauxite | Aluminum | Open Pit | Royalties | 0.3 |
|  | **Total** |  |  |  |  |  |  | $**2.3** |

---

(1)Royalty payments owed to the Government of Jamaica are calculated based on the alumina produced at the refinery. This disclosure has been done at an entity level as this is the lowest level of disaggregation used for payments. Jamalco is our only entity that makes payments to the Government of Jamaica.

<br>