CENX

Century Aluminum Co

Insider trading activity for Century Aluminum Co, straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 12 months

-$625.3M

net selling

Bought(0 · 0 insiders): $0
Sold(13 · 9 insiders): $625.3M

Transaction history

The 69 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Jun 15	Glasser Errol	Director	AGRANT	2,172	—	—	+1.8%	Open the original filing on SEC.gov
Jun 15	Michelmore Andrew G	Director	FTAX	652	$54.55	$35.6K	-0.7%	Open the original filing on SEC.gov
Jun 15	Michelmore Andrew G	Director	AGRANT	2,172	—	—	+2.4%	Open the original filing on SEC.gov
Jun 15	Olivier Tamla A	Director	AGRANT	2,172	—	—	+7.3%	Open the original filing on SEC.gov
Jun 15	Bush Jennifer Mary	Director	AGRANT	2,172	—	—	+4.6%	Open the original filing on SEC.gov
Jun 15	Berntzen Jarl	Director	AGRANT	2,172	—	—	+1.0%	Open the original filing on SEC.gov
Mar 25	Trpkovski Peter A	EVP, CFO	SSELL	16,739	$50.51	$845.5K	-20.7%	Open the original filing on SEC.gov
Mar 16	Gary Jesse E	President and CEO	SSELL◷	150,000	$55.47	$8.3M	-51.3%	Open the original filing on SEC.gov
Mar 12	Calloway Kenneth L	SVP, Human Resources	SSELL	18,000	$58.00	$1M	-42.0%	Open the original filing on SEC.gov
Mar 11	Hoffman Robert F	SVP, IT and CAO	SSELL	10,529	$56.51	$595K	-15.7%	Open the original filing on SEC.gov
Mar 4	Glencore International…	10% Owner	SSELL	6.3M	$51.75	$326.8M	-34.1%	Open the original filing on SEC.gov
Mar 4	Hoffman Robert F	SVP, IT and CAO	SSELL	10,000	$56.33	$563.3K	-13.0%	Open the original filing on SEC.gov
Mar 3	Aboud Matt	SVP, Strategy &…	SSELL	2,971	$52.67	$156.5K	-4.4%	Open the original filing on SEC.gov
Mar 2	Aboud Matt	SVP, Strategy &…	SSELL	12,126	$52.50	$636.6K	-15.2%	Open the original filing on SEC.gov
Feb 27	Hafberg Agust F	SVP & Chief Commercial…	SSELL	22,884	$51.24	$1.2M	-33.7%	Open the original filing on SEC.gov
Feb 25	Gudlaugsson Gunnar	EVP - Global Operations	SSELL	43,000	$54.10	$2.3M	-24.0%	Open the original filing on SEC.gov
Feb 23	DeZee John	EVP, GC and Secretary	SSELL	66,000	$50.72	$3.3M	-40.3%	Open the original filing on SEC.gov
Feb 9	Trpkovski Peter A	EVP, CFO	FTAX	4,240	$54.36	$230.5K	-5.0%	Open the original filing on SEC.gov
Jan 23	Gary Jesse E	President and CEO	SSELL◷	150,000	$48.19	$7.2M	-33.9%	Open the original filing on SEC.gov
Jan 12	Gary Jesse E	President and CEO	GGIFT◷	314,611	—	—	+245.8%	Open the original filing on SEC.gov
Jan 12	Gary Jesse E	President and CEO	GGIFT◷	314,611	—	—	-53.2%	Open the original filing on SEC.gov
Jan 1	Gary Jesse E	President and CEO	AGRANT	57,443	—	—	+10.8%	Open the original filing on SEC.gov
Jan 1	Gudlaugsson Gunnar	EVP - Global Operations	AGRANT	15,624	—	—	+9.5%	Open the original filing on SEC.gov
Jan 1	Hafberg Agust F	SVP & Chief Commercial…	AGRANT	5,238	—	—	+8.3%	Open the original filing on SEC.gov
Jan 1	Trpkovski Peter A	EVP, CFO and Treasurer	AGRANT	13,488	—	—	+18.8%	Open the original filing on SEC.gov
Jan 1	Hoffman Robert F	SVP, IT and CAO	AGRANT	5,122	—	—	+7.1%	Open the original filing on SEC.gov
Jan 1	DeZee John	EVP, GC and Secretary	AGRANT	9,821	—	—	+6.4%	Open the original filing on SEC.gov
Jan 1	Calloway Kenneth L	SVP, Human Resources	AGRANT	5,238	—	—	+13.9%	Open the original filing on SEC.gov
Jan 1	Aboud Matt	SVP, Strategy &…	AGRANT	5,529	—	—	+7.4%	Open the original filing on SEC.gov
Dec 31, 2025	Gary Jesse E	President and CEO	FTAX	67,711	$39.18	$2.7M	-11.3%	Open the original filing on SEC.gov
Dec 31, 2025	Gary Jesse E	President and CEO	FTAX	203,131	$39.18	$8M	-25.2%	Open the original filing on SEC.gov
Dec 31, 2025	Gary Jesse E	President and CEO	AGRANT	439,090	—	—	+119.9%	Open the original filing on SEC.gov
Dec 31, 2025	Gudlaugsson Gunnar	EVP - Global Operations	FTAX	20,943	$39.18	$820.5K	-11.3%	Open the original filing on SEC.gov
Dec 31, 2025	Gudlaugsson Gunnar	EVP - Global Operations	FTAX	41,886	$39.18	$1.6M	-18.5%	Open the original filing on SEC.gov
Dec 31, 2025	Gudlaugsson Gunnar	EVP - Global Operations	AGRANT	82,794	—	—	+57.6%	Open the original filing on SEC.gov
Dec 31, 2025	Hafberg Agust F	SVP & Chief Commercial…	FTAX	7,811	$39.18	$306K	-11.1%	Open the original filing on SEC.gov
Dec 31, 2025	Hafberg Agust F	SVP & Chief Commercial…	FTAX	15,622	$39.18	$612.1K	-18.1%	Open the original filing on SEC.gov
Dec 31, 2025	Hafberg Agust F	SVP & Chief Commercial…	AGRANT	30,878	—	—	+55.9%	Open the original filing on SEC.gov
Dec 31, 2025	Trpkovski Peter A	EVP, CFO and Treasurer	FTAX	4,045	$39.18	$158.5K	-5.3%	Open the original filing on SEC.gov
Dec 31, 2025	Trpkovski Peter A	EVP, CFO and Treasurer	FTAX	8,090	$39.18	$317K	-9.7%	Open the original filing on SEC.gov
Dec 31, 2025	Trpkovski Peter A	EVP, CFO and Treasurer	AGRANT	18,260	—	—	+27.9%	Open the original filing on SEC.gov
Dec 31, 2025	Hoffman Robert F	SVP, IT and CAO	FTAX	6,228	$39.18	$244K	-8.0%	Open the original filing on SEC.gov
Dec 31, 2025	Hoffman Robert F	SVP, IT and CAO	FTAX	12,455	$39.18	$488K	-13.7%	Open the original filing on SEC.gov
Dec 31, 2025	Hoffman Robert F	SVP, IT and CAO	AGRANT	31,650	—	—	+53.6%	Open the original filing on SEC.gov
Dec 31, 2025	DeZee John	EVP, GC and Secretary	FTAX	11,971	$39.18	$469K	-7.2%	Open the original filing on SEC.gov
Dec 31, 2025	DeZee John	EVP, GC and Secretary	FTAX	21,163	$39.18	$829.2K	-11.3%	Open the original filing on SEC.gov
Dec 31, 2025	DeZee John	EVP, GC and Secretary	AGRANT	54,042	—	—	+40.7%	Open the original filing on SEC.gov
Dec 31, 2025	Calloway Kenneth L	SVP, Human Resources	FTAX	3,723	$39.18	$145.9K	-9.0%	Open the original filing on SEC.gov
Dec 31, 2025	Calloway Kenneth L	SVP, Human Resources	FTAX	5,469	$39.18	$214.3K	-11.7%	Open the original filing on SEC.gov
Dec 31, 2025	Calloway Kenneth L	SVP, Human Resources	AGRANT	18,150	—	—	+63.2%	Open the original filing on SEC.gov
Dec 31, 2025	Aboud Matt	SVP, Strategy &…	FTAX	8,243	$39.18	$323K	-10.0%	Open the original filing on SEC.gov
Dec 31, 2025	Aboud Matt	SVP, Strategy &…	FTAX	16,485	$39.18	$645.9K	-16.6%	Open the original filing on SEC.gov
Dec 31, 2025	Aboud Matt	SVP, Strategy &…	AGRANT	36,550	—	—	+58.4%	Open the original filing on SEC.gov
Nov 10, 2025	Glencore International…	10% Owner	CCONV◆	49,485.91	—	—	—	Open the original filing on SEC.gov
Nov 10, 2025	Glencore International…	10% Owner	CCONV	4.9M	—	—	+39.4%	Open the original filing on SEC.gov
Nov 10, 2025	Glencore International…	10% Owner	SSELL	9M	$30.25	$272.3M	-32.7%	Open the original filing on SEC.gov
Sep 30, 2025	Glencore International…	10% Owner	CCONV◆	28.48	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Glencore International…	10% Owner	CCONV	2,848	—	—	+<0.1%	Open the original filing on SEC.gov
Sep 26, 2025	Hafberg Agust F	SVP & Chief Commercial…	SSELL	9,493	$27.91	$264.9K	-14.7%	Open the original filing on SEC.gov
Sep 19, 2025	Calloway Kenneth L	SVP, Human Resources	SSELL	16,450	$27.50	$452.4K	-36.4%	Open the original filing on SEC.gov
Aug 12, 2025	Aboud Matt	SVP, Strategy &…	SSELL	12,027	$23.27	$279.9K	-16.1%	Open the original filing on SEC.gov
Jun 30, 2025	Glencore International…	10% Owner	CCONV◆	164.77	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Glencore International…	10% Owner	CCONV	16,477	—	—	+0.1%	Open the original filing on SEC.gov
Jun 16, 2025	Glasser Errol	Director	AGRANT	7,778	—	—	+7.0%	Open the original filing on SEC.gov
Jun 16, 2025	Olivier Tamla A	Director	AGRANT	7,778	—	—	+35.5%	Open the original filing on SEC.gov
Jun 16, 2025	Michelmore Andrew G	Director	FTAX	2,333	$17.36	$40.5K	-2.5%	Open the original filing on SEC.gov
Jun 16, 2025	Michelmore Andrew G	Director	AGRANT	7,778	—	—	+9.3%	Open the original filing on SEC.gov
Jun 16, 2025	Bush Jennifer Mary	Director	AGRANT	7,778	—	—	+19.9%	Open the original filing on SEC.gov
Jun 16, 2025	Berntzen Jarl	Director	AGRANT	7,778	—	—	+3.9%	Open the original filing on SEC.gov

AGRANT—

Glasser Errol · DirectorJun 15

2,172 sh · +1.8% own

FTAX$35.6K

Michelmore Andrew G · DirectorJun 15

652 sh @ $54.55 · -0.7% own

AGRANT—

Michelmore Andrew G · DirectorJun 15

2,172 sh · +2.4% own

AGRANT—

Olivier Tamla A · DirectorJun 15

2,172 sh · +7.3% own

AGRANT—

Bush Jennifer Mary · DirectorJun 15

2,172 sh · +4.6% own

AGRANT—

Berntzen Jarl · DirectorJun 15

2,172 sh · +1.0% own

SSELL$845.5K

Trpkovski Peter A · EVP, CFOMar 25

16,739 sh @ $50.51 · -20.7% own

SSELL◷$8.3M

Gary Jesse E · President and CEOMar 16

150,000 sh @ $55.47 · -51.3% own

SSELL$1M

Calloway Kenneth L · SVP, Human Resourc…Mar 12

18,000 sh @ $58.00 · -42.0% own

SSELL$595K

Hoffman Robert F · SVP, IT and CAOMar 11

10,529 sh @ $56.51 · -15.7% own

SSELL$326.8M

Glencore International… · 10% OwnerMar 4

6.3M sh @ $51.75 · -34.1% own

SSELL$563.3K

Hoffman Robert F · SVP, IT and CAOMar 4

10,000 sh @ $56.33 · -13.0% own

SSELL$156.5K

Aboud Matt · SVP, Strategy &…Mar 3

2,971 sh @ $52.67 · -4.4% own

SSELL$636.6K

Aboud Matt · SVP, Strategy &…Mar 2

12,126 sh @ $52.50 · -15.2% own

SSELL$1.2M

Hafberg Agust F · SVP & Chief…Feb 27

22,884 sh @ $51.24 · -33.7% own

SSELL$2.3M

Gudlaugsson Gunnar · EVP - Global…Feb 25

43,000 sh @ $54.10 · -24.0% own

SSELL$3.3M

DeZee John · EVP, GC and…Feb 23

66,000 sh @ $50.72 · -40.3% own

FTAX$230.5K

Trpkovski Peter A · EVP, CFOFeb 9

4,240 sh @ $54.36 · -5.0% own

SSELL◷$7.2M

Gary Jesse E · President and CEOJan 23

150,000 sh @ $48.19 · -33.9% own

GGIFT◷—

Gary Jesse E · President and CEOJan 12

314,611 sh · +245.8% own

GGIFT◷—

Gary Jesse E · President and CEOJan 12

314,611 sh · -53.2% own

AGRANT—

Gary Jesse E · President and CEOJan 1

57,443 sh · +10.8% own

AGRANT—

Gudlaugsson Gunnar · EVP - Global…Jan 1

15,624 sh · +9.5% own

AGRANT—

Hafberg Agust F · SVP & Chief…Jan 1

5,238 sh · +8.3% own

AGRANT—

Trpkovski Peter A · EVP, CFO and…Jan 1

13,488 sh · +18.8% own

AGRANT—

Hoffman Robert F · SVP, IT and CAOJan 1

5,122 sh · +7.1% own

AGRANT—

DeZee John · EVP, GC and…Jan 1

9,821 sh · +6.4% own

AGRANT—

Calloway Kenneth L · SVP, Human Resourc…Jan 1

5,238 sh · +13.9% own

AGRANT—

Aboud Matt · SVP, Strategy &…Jan 1

5,529 sh · +7.4% own

FTAX$2.7M

Gary Jesse E · President and CEODec 31, 2025

67,711 sh @ $39.18 · -11.3% own

FTAX$8M

Gary Jesse E · President and CEODec 31, 2025

203,131 sh @ $39.18 · -25.2% own

AGRANT—

Gary Jesse E · President and CEODec 31, 2025

439,090 sh · +119.9% own

FTAX$820.5K

Gudlaugsson Gunnar · EVP - Global…Dec 31, 2025

20,943 sh @ $39.18 · -11.3% own

FTAX$1.6M

Gudlaugsson Gunnar · EVP - Global…Dec 31, 2025

41,886 sh @ $39.18 · -18.5% own

AGRANT—

Gudlaugsson Gunnar · EVP - Global…Dec 31, 2025

82,794 sh · +57.6% own

FTAX$306K

Hafberg Agust F · SVP & Chief…Dec 31, 2025

7,811 sh @ $39.18 · -11.1% own

FTAX$612.1K

Hafberg Agust F · SVP & Chief…Dec 31, 2025

15,622 sh @ $39.18 · -18.1% own

AGRANT—

Hafberg Agust F · SVP & Chief…Dec 31, 2025

30,878 sh · +55.9% own

FTAX$158.5K

Trpkovski Peter A · EVP, CFO and…Dec 31, 2025

4,045 sh @ $39.18 · -5.3% own

FTAX$317K

Trpkovski Peter A · EVP, CFO and…Dec 31, 2025

8,090 sh @ $39.18 · -9.7% own

AGRANT—

Trpkovski Peter A · EVP, CFO and…Dec 31, 2025

18,260 sh · +27.9% own

FTAX$244K

Hoffman Robert F · SVP, IT and CAODec 31, 2025

6,228 sh @ $39.18 · -8.0% own

FTAX$488K

Hoffman Robert F · SVP, IT and CAODec 31, 2025

12,455 sh @ $39.18 · -13.7% own

AGRANT—

Hoffman Robert F · SVP, IT and CAODec 31, 2025

31,650 sh · +53.6% own

FTAX$469K

DeZee John · EVP, GC and…Dec 31, 2025

11,971 sh @ $39.18 · -7.2% own

FTAX$829.2K

DeZee John · EVP, GC and…Dec 31, 2025

21,163 sh @ $39.18 · -11.3% own

AGRANT—

DeZee John · EVP, GC and…Dec 31, 2025

54,042 sh · +40.7% own

FTAX$145.9K

Calloway Kenneth L · SVP, Human Resourc…Dec 31, 2025

3,723 sh @ $39.18 · -9.0% own

FTAX$214.3K

Calloway Kenneth L · SVP, Human Resourc…Dec 31, 2025

5,469 sh @ $39.18 · -11.7% own

AGRANT—

Calloway Kenneth L · SVP, Human Resourc…Dec 31, 2025

18,150 sh · +63.2% own

FTAX$323K

Aboud Matt · SVP, Strategy &…Dec 31, 2025

8,243 sh @ $39.18 · -10.0% own

FTAX$645.9K

Aboud Matt · SVP, Strategy &…Dec 31, 2025

16,485 sh @ $39.18 · -16.6% own

AGRANT—

Aboud Matt · SVP, Strategy &…Dec 31, 2025

36,550 sh · +58.4% own

CCONV◆—

Glencore International… · 10% OwnerNov 10, 2025

49,485.91 sh

CCONV—

Glencore International… · 10% OwnerNov 10, 2025

4.9M sh · +39.4% own

SSELL$272.3M

Glencore International… · 10% OwnerNov 10, 2025

9M sh @ $30.25 · -32.7% own

CCONV◆—

Glencore International… · 10% OwnerSep 30, 2025

28.48 sh

CCONV—

Glencore International… · 10% OwnerSep 30, 2025

2,848 sh · +<0.1% own

SSELL$264.9K

Hafberg Agust F · SVP & Chief…Sep 26, 2025

9,493 sh @ $27.91 · -14.7% own

SSELL$452.4K

Calloway Kenneth L · SVP, Human Resourc…Sep 19, 2025

16,450 sh @ $27.50 · -36.4% own

SSELL$279.9K

Aboud Matt · SVP, Strategy &…Aug 12, 2025

12,027 sh @ $23.27 · -16.1% own

CCONV◆—

Glencore International… · 10% OwnerJun 30, 2025

164.77 sh

CCONV—

Glencore International… · 10% OwnerJun 30, 2025

16,477 sh · +0.1% own

AGRANT—

Glasser Errol · DirectorJun 16, 2025

7,778 sh · +7.0% own

AGRANT—

Olivier Tamla A · DirectorJun 16, 2025

7,778 sh · +35.5% own

FTAX$40.5K

Michelmore Andrew G · DirectorJun 16, 2025

2,333 sh @ $17.36 · -2.5% own

AGRANT—

Michelmore Andrew G · DirectorJun 16, 2025

7,778 sh · +9.3% own

AGRANT—

Bush Jennifer Mary · DirectorJun 16, 2025

7,778 sh · +19.9% own

AGRANT—

Berntzen Jarl · DirectorJun 16, 2025

7,778 sh · +3.9% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

1 of 35 filings we hold was filed after the two-business-day deadline. The furthest past the deadline was 5 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Jan 12	Jan 22	Gary Jesse EPresident and CEO	5days	$7.2M	Filing ↗

Gary Jesse EPresident and CEO

5days

Traded Jan 12 · filed Jan 22Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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