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ISSUER PROFILE · CIK 0000949157 · CUSIP 156431108

CENTURY ALUMINUM COCENX

4 13D/G filings 1 distinct filers 62 insider transactions (365d)

Post-Filing Returns · across 1 activist filings on this issuer

Median 30d
avg —
Median 60d
avg —
Median 90d
avg —
Median 180d
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Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
4
1 SCHEDULE · 3 SC
Distinct filers
1
single filer
Insiders (365d)
62
21 buys · 16 sales
Latest short DTC
4.43
as of 2026-05-29

Institutional Consensus · 2025-12-31

Held by elite portfolio managers
1 holder · $7.71M
Point72 Asset Mgmt

13D/G Filings Timeline · 4 total

FiledFormFilerStakeSharesIntent
2025-11-12 SCHEDULE GLENCORE INTERNATIONAL AG 36.60% 36,005,947 view →
2024-01-05 SC GLENCORE INTERNATIONAL AG view →
2020-09-30 SC GLENCORE INTERNATIONAL AG view →
2020-08-20 SC GLENCORE INTERNATIONAL AG view →

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-03-25 Trpkovski Peter A officer Sale 16,739 $50.51 $845K
2026-03-16 Gary Jesse E director, officer Sale 150,000 $55.47 $8.32M
2026-03-12 Calloway Kenneth L officer Sale 18,000 $58.00 $1.04M
2026-03-11 Hoffman Robert F officer Sale 10,529 $56.51 $595K
2026-03-04 Hoffman Robert F officer Sale 10,000 $56.33 $563K
2026-03-04 GLENCORE INTERNATIONAL AG 10%+ Sale 6,315,245 $51.75 $326.81M
2026-03-03 Aboud Matt officer Sale 2,971 $52.67 $156K
2026-03-02 Aboud Matt officer Sale 12,126 $52.50 $637K
2026-02-27 Hafberg Agust F officer Sale 22,884 $51.24 $1.17M
2026-02-25 Gudlaugsson Gunnar officer Sale 43,000 $54.10 $2.33M
2026-02-23 DeZee John officer Sale 66,000 $50.72 $3.35M
2026-02-09 Trpkovski Peter A officer F 4,240 $54.36 $230K
2026-01-23 Gary Jesse E director, officer Sale 150,000 $48.19 $7.23M
2026-01-12 Gary Jesse E director, officer Gift 314,611
2026-01-01 Aboud Matt officer Award 5,529
2026-01-01 Calloway Kenneth L officer Award 5,238
2026-01-01 DeZee John officer Award 9,821
2026-01-01 Hoffman Robert F officer Award 5,122
2026-01-01 Trpkovski Peter A officer Award 13,488
2026-01-01 Hafberg Agust F officer Award 5,238
2026-01-01 Gudlaugsson Gunnar officer Award 15,624
2026-01-01 Gary Jesse E director, officer Award 57,443
2025-12-31 Gary Jesse E director, officer Award 439,090
2025-12-31 Gudlaugsson Gunnar officer Award 82,794
2025-12-31 Hafberg Agust F officer Award 30,878
Showing 25 of 62

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-05-29 8,044,208 4.43 -1.7%
2026-05-15 8,184,268 4.85 +0.0%
2026-04-30 8,181,214 6.93 +0.9%
2026-04-15 8,111,770 4.24 +7.2%
2026-03-31 7,567,705 2.84 -3.2%
2026-03-13 7,815,330 3.14 -2.9%
2026-02-27 8,050,474 3.17 +0.5%
2026-02-13 8,014,287 3.37 -4.3%
2026-01-30 8,370,550 3.78 -0.6%
2026-01-15 8,420,925 3.71 +10.6%
2025-12-31 7,613,184 4.48 +0.6%
2025-12-15 7,571,512 4.25 +2.5%

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