MarketPeel
Insider Trading Intelligence
KC

Kenneth L. Calloway

CENX
SVP, HUMAN RESOURCES · CENTURY ALUMINUM CO · CIK 0002014963
FILING MIX · LIFETIME40%/60%
BUYS
4
SELLS
6
TOTAL VALUE
$1.94M
COMPANIES
1
ACTIVE SINCE
Dec 2024
HOLDINGS NOW
24,902
AVG SELL PX
$40.31
TRADE KIND
SHOWING 10 / 10
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
2 backtested trades · 8 horizons · 5 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Kenneth L. Calloway, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d2+50.00%-6.22%-0.61%-5.61%-5.61%
14d2+50.00%-3.90%-1.16%-2.74%-2.74%
30d2+0.00%+20.15%+1.58%+18.57%+18.57%
60d2+50.00%+1.49%+5.22%-3.74%-3.74%
90d2+0.00%+14.09%+6.29%+7.80%+7.80%
180d2(1 pending)+0.00%+100.72%-0.34%+101.07%+101.07%
1y2(2 pending)
2y2(2 pending)
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
CENX · 24,902 shares · as of Mar 12, 2026
011,71423,42835,14246,85620252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2024
2025
2025
2025
2025
2026
FLOW · 4 buys / 6 sellsCOVERAGE · 6 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
CENX
CENTURY ALUMINUM CO
SALE
SVP, Human Resources
18,000$58.00$1.04M24,902Mar 12, 2026Mar 13, 2026View →
CENX
CENTURY ALUMINUM CO
PURCHASEGRANT
Stock grant
5,23842,902Jan 1, 2026Jan 5, 2026View →
CENX
CENTURY ALUMINUM CO
PURCHASEGRANT
Stock grant
18,15046,856Dec 31, 2025Jan 5, 2026View →
CENX
CENTURY ALUMINUM CO
SALE
SVP, Human Resources
5,469$39.18$214.3K41,387Dec 31, 2025Jan 5, 2026View →
CENX
CENTURY ALUMINUM CO
SALE
SVP, Human Resources
3,723$39.18$145.9K37,664Dec 31, 2025Jan 5, 2026View →
CENX
CENTURY ALUMINUM CO
SALE
SVP, Human Resources
16,450$27.50$452.4K28,706Sep 19, 2025Sep 23, 2025View →
CENX
CENTURY ALUMINUM CO
PURCHASEGRANT
Stock grant
7,78745,156Jan 1, 2025Jan 3, 2025View →
CENX
CENTURY ALUMINUM CO
PURCHASEGRANT
Stock grant
7,26741,774Dec 31, 2024Jan 3, 2025View →
CENX
CENTURY ALUMINUM CO
SALE
SVP, Human Resources
3,280$18.22$59.8K38,494Dec 31, 2024Jan 3, 2025View →
CENX
CENTURY ALUMINUM CO
SALE
SVP, Human Resources
1,125$18.22$20.5K37,369Dec 31, 2024Jan 3, 2025View →
Other insiders · CENX
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About this filer
CIK 0002014963
ROLE
SVP, Human Resources
PRIMARY
CENX
COMPANIES
1
ACTIVE SINCE
Dec 2024
MARKETPEEL · /INSIDER/0002014963DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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