# Century Aluminum Co. COM

Century Aluminum Co. COM is a security (CUSIP 156431108) tracked across SEC portfolio filings. 421 institutional managers reported $5.4B on Form 13F as of 2026-06-30; 29 registered fund positions totaling $163.7M via N-PORT as of 2026-05-31.

## Summary

- Issuer: Century Aluminum Co.
- Class: COM
- CUSIP: 156431108
- Asset category: EC
- 13F holders: 421
- 13F value: $5.4B
- 13F period: 2026-06-30
- N-PORT fund positions: 29
- N-PORT value: $163.7M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 421 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| Glencore plc | BAAR, V8 | $1.4B | 29,690,702 |
| BlackRock, Inc. | New York, NY | $528.8M | 9,010,379 |
| STATE STREET CORP | BOSTON, MA | $273.9M | 4,667,540 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $271.9M | 6,939,794 |
| [Sourcerock Group LLC](https://search.stillhousedata.com/firm/307575) | DENVER, CO | $157.7M | 2,687,249 |
| FMR LLC | BOSTON, MA | $156.1M | 2,660,054 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $128.6M | 2,190,922 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $116.7M | 1,987,625 |
| UBS Group AG | Zurich, V8 | $102.0M | 586,766 |
| [CITADEL ADVISORS LLC](https://search.stillhousedata.com/firm/148826) | MIAMI, FL | $99.2M | 1,320,867 |
| MORGAN STANLEY | NEW YORK, NY | $93.0M | 1,585,230 |
| JANE STREET GROUP, LLC | NEW YORK, NY | $92.7M | 1,320,942 |
| [Encompass Capital Advisors LLC](https://search.stillhousedata.com/firm/160113) | New York, NY | $91.0M | 1,551,362 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $90.4M | 1,540,212 |
| D. E. Shaw & Co., Inc. | New York, NY | $86.7M | 1,433,369 |

## Top fund holders (N-PORT)

_Showing 15 of 29 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $34.9M | 4.28% |
| [VANGUARD STRATEGIC EQUITY FUND](https://search.stillhousedata.com/fund/S000002593) | VANGUARD HORIZON FUNDS | $31.6M | 31.21% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $20.4M | 27.33% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $19.3M | 11.00% |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $12.9M | 5.92% |
| ROYCE SMALL-CAP TRUST, INC. | ROYCE SMALL-CAP TRUST, INC. | $8.3M | 37.14% |
| [Fidelity Advisor Stock Selector Mid Cap Fund](https://search.stillhousedata.com/fund/S000005114) | Fidelity Advisor Series I | $6.8M | 26.94% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $5.1M | 10.50% |
| [NORTH SQUARE SMALL CAP VALUE FUND](https://search.stillhousedata.com/fund/S000091143) | Valued Advisers Trust | $3.9M | 188.08% |
| [Small Cap Core Portfolio](https://search.stillhousedata.com/fund/S000051867) | Bernstein Fund Inc | $3.4M | 47.78% |
| [Cohen & Steers Real Assets Fund, Inc.](https://search.stillhousedata.com/fund/S000035709) | Cohen & Steers Real Assets Fund, Inc. | $3.1M | 17.12% |
| [VANGUARD MARKET NEUTRAL FUND](https://search.stillhousedata.com/fund/S000019457) | VANGUARD MONTGOMERY FUNDS | $2.0M | 45.66% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $2.0M | 0.33% |
| [VANGUARD U.S. MOMENTUM FACTOR ETF](https://search.stillhousedata.com/fund/S000061302) | VANGUARD WELLINGTON FUND | $1.9M | 10.38% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $1.6M | 0.54% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/156431108.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

---

Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.