Insider Cluster (1 insider) ·Filed Mar 4, 2026

CENX

CENTURY ALUMINUM CO
BEARISH
Impact 5/10
Horizondays Processed6mo ago
Insider cluster: 2 insiders, $327.4M total
Actionable Insight ▼ Bearish

Monitor for additional insider sales — such a high volume of coordinated selling, especially at the C-suite level, may signal weakening confidence ahead of earnings or macro challenges in the aluminum sector.

DirectionBearish
Confidencehigh
Horizondays
Final — all horizons settled through T+60d
CENX ▲ +26.39% at T+60d
SHORT call ✗ call lost -26.39% · α vs SPY -16.30% · entry $53.43 → $67.53
Entry anchored
Mar 3, 03:59 PM ET
via exchange tick
T+1d
+0.88%
call -0.88% · α -1.45%
$53.90
settled 7mo ago
T+5d
+8.68%
call -8.68% · α -10.02%
$58.07
settled 7mo ago
T+20d
+18.87%
call -18.87% · α -23.28%
$63.51
settled 6mo ago
T+60d
+26.39%
call -26.39% · α -16.30%
$67.53
settled 4mo ago

Price Chart

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Executive Summary

SVP and Chief Administrative Officer Robert F. Hoffman sold $595K of CENX shares in an open-market transaction. This is part of a broader pattern of insider selling, with $334.4M in total insider sales over the past 30 days, now including this recent trade.

Key Financial Metrics

Direction
selling
Total Value
$595.0K
Insiders
1

Key Facts

  • Robert F. Hoffman, SVP and CAO of CENX, sold 10,529 shares at $56.51 per share
  • Total transaction value: $594,993.79 in open-market sale
  • This sale is part of a larger cluster of insider selling totaling $334.4M over the past 30 days
  • All recent transactions in the cluster are open-market sales (code 'S')
  • The total insider selling volume represents approximately 5.9% of the company's $5.7B market cap

Financial Impact

$595K single transaction; $334.4M in total insider selling over 30 days (5.9% of market cap)

insider ownershipmarket sentimentshareholder confidence

Risk Factors

  • Sustained insider selling could erode investor confidence
  • Potential for downward price pressure if selling continues
  • Mismatch between insider behavior and public messaging about company prospects

Market Snapshot

Exchange
Nasdaq

Investment Themes

Materials & Mining

Documents Analyzed

This report is based on 1 SEC document filed with EDGAR.

DocumentAccession Number
CONTEXT: Insider Cluster Data (1 trades, 7d window)cluster-CENX-1773436131890
8 reports for CENX
Performance horizon
67% Hit rate 2 of 3 directional calls best @ T+20▲ +5.34%Feb 25, 2026
Filters
Rows
Reports for CENX — sortable, filterable
TypeNow
Jul 27, 2026
9w ago
Press Release
BEARISH ★ 7/10
$43.96 $44.20▼ −0.55%▲ +2.84%$35.62 (+18.97%)
Jun 19, 2026
15w ago
Institutional Cluster
BULLISH ★ 6/10
$49.53 $41.50▼ −16.21%▼ −16.06%$35.62 (−28.08%)
Jun 11, 2026
16w ago
Institutional Cluster
MIXED ★ 4/10
$60.94 $45.11▼ −25.98%▼ −27.87%$35.62 (−41.55%)
Apr 29, 2026
22w ago
Press Release
NEUTRAL ★ 2/10
$58.98 $65.72▲ +11.43%▲ +5.97%$35.62 (−39.61%)
Apr 24, 2026
23w ago
DEFA14A
NEUTRAL ★ 2/10
$60.74 $60.46▼ −0.46%▼ −4.49%$35.62 (−41.36%)
Mar 4, 2026
30w ago
Insider Cluster
BEARISH ★ 5/10
$53.43 $63.51▼ −18.87%▼ −23.28%$35.62 (+33.33%)
Feb 25, 2026
31w ago
Insider Cluster
BEARISH ★ 9/10
$53.02 $50.19▲ +5.34%▲ +0.10%$35.62 (+32.82%)
Feb 23, 2026
31w ago
Insider Cluster
NEUTRAL ★ 4/10
$51.84 $46.48▼ −10.34%▼ −6.39%$35.62 (−31.29%)
Showing 8 of 8

US Market Status

Market Closed — Opens Mon (37h 46m)

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Report published Mar 13, 2026