Company profile
Century Aluminum Co Insider Trading
CENXEvery SEC Form 4 insider trading filing for Century Aluminum Co (CENX) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- Nasdaq
- Sector
- Primary Production of Aluminum
- CIK
- 0000949157
- Filings
- 87
- Insiders
- 17
- Last filing
- 2026-06-15
Activity summary
No insider transactions in the last 30 days. The most recent was on June 15, 2026, when Michelmore Andrew G sold 652 shares. 87 filings from 17 insiders are on record below.
Three year balance
Buy and sell value by quarter, Q3 23 to Q2 26. Century Aluminum Co insiders were net sellers in every quarter shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $353.3M.
90 day insight
Over the last 90 days, Century Aluminum Co insiders bought $0 (5 transactions) and sold $36K (1 transaction).
- Most active insider: Michelmore Andrew G with 2 transactions totaling $36K.
- Largest single sale: $36K by Michelmore Andrew G on Jun 15, 2026.
Activity skews bullish — buys outpace sales.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 15, 2026 | Michelmore Andrew G | CENX | Tax Withholding | 652 | $54.55 | $36K |
| Jun 15, 2026 | Glasser Errol | CENX | Award | 2,172 | — | — |
| Jun 15, 2026 | Bush Jennifer Mary | CENX | Award | 2,172 | — | — |
| Jun 15, 2026 | Michelmore Andrew G | CENX | Award | 2,172 | — | — |
| Jun 15, 2026 | Olivier Tamla A | CENX | Award | 2,172 | — | — |
45 more transactions hidden
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-H "X-Api-Key: $KEY"Top insiders
By total value filed.
Institutional Ownership
Top 13F-HR holders of Century Aluminum Co as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →