Jarl Berntzen

Insider

First SEC filing: June 17, 2026 · Latest: June 17, 2026

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.

Insider at

CENX buying Oct. 30, 2018

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 24 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

24 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 15, 2026	CENX	A	2,172	—	—	211,123 Direct	+1.04%	Acquired	(price as of 2026-08-21)
June 16, 2025	CENX	A	7,778	—	—	208,951 Direct	+3.87%	Acquired	(price as of 2026-08-21)
June 3, 2024	CENX	A	7,070	—	—	201,173 Direct	+3.64%	Acquired	(price as of 2026-08-21)
June 5, 2023	CENX	A	14,825	—	—	194,103 Direct	+8.27%	Acquired	(price as of 2026-08-21)
June 14, 2022	CENX	A	9,358	—	—	179,278 Direct	+5.51%	Acquired	(price as of 2026-08-21)
June 15, 2021	CENX	A	7,737	—	—	169,920 Direct	+4.77%	Acquired	(price as of 2026-08-21)
June 9, 2020	CENX	A	26,851	—	—	162,183 Direct	+19.84%	Acquired	(price as of 2026-08-21)
June 4, 2019	CENX	A	19,053	—	—	135,332 Direct	+16.39%	Acquired	(price as of 2026-08-21)
Oct. 30, 2018	CENX	P	10,000	$7.80	$78,000	116,279 Direct	+9.41%	Acquired	476.4% (price as of 2026-08-21)
June 19, 2018	CENX	A	8,371	—	—	106,279 Direct	+8.55%	Acquired	(price as of 2026-08-21)
June 20, 2017	CENX	A	9,342	—	—	97,908 Direct	+10.55%	Acquired	(price as of 2026-08-21)
June 28, 2016	CENX	A	19,775	—	—	88,566 Direct	+28.75%	Acquired	(price as of 2026-08-21)
Sept. 2, 2015	CENX	A	19,037	—	—	68,791 Direct	+38.26%	Acquired	(price as of 2026-08-21)
Sept. 2, 2015	CENX	A	18,792	—	—	68,546 Direct	+37.77%	Acquired	(price as of 2026-08-21)
Sept. 9, 2014	CENX	A	3,495	—	—	49,754 Direct	+7.56%	Acquired	(price as of 2026-08-21)
Sept. 24, 2013	CENX	A	9,004	—	—	46,259 Direct	+24.17%	Acquired	(price as of 2026-08-21)
Sept. 19, 2012	CENX	A	11,078	—	—	37,255 Direct	+42.32%	Acquired	(price as of 2026-08-21)
June 8, 2011	CENX	A	4,565	—	—	26,177 Direct	+21.12%	Acquired	(price as of 2026-08-21)
June 9, 2010	CENX	A	6,732	—	—	21,612 Direct	+45.24%	Acquired	(price as of 2026-08-21)
May 28, 2009	CENX	A	13,833	—	—	14,880 Direct	+1321.20%	Acquired	(price as of 2026-08-21)
June 25, 2008	CENX	A	1,047	—	—	1,047 Direct	—	Acquired	(price as of 2026-08-21)
May 24, 2007	CENX	A	3,000	—	—	3,000 Direct	—	Acquired	(price as of 2026-08-21)
June 12, 2006	CENX	A	3,000	—	—	3,000 Direct	—	Acquired	(price as of 2026-08-21)
June 12, 2006	CENX	A	3,000	—	—	3,000 Direct	—	Acquired	(price as of 2026-08-21)
March 8, 2006	CENX	A	10,000	—	—	10,000 Direct	—	Acquired	(price as of 2026-08-21)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
May 24, 2007	CENX	Stock Option [F1]	Common Stock (3,000)	$55.06	May 24, 2017	3,000	Acquired
June 12, 2006	CENX	Stock Option	Common Stock (3,000)	$37.31	June 12, 2016	3,000	Acquired
June 12, 2006	CENX	Stock Option	Common Stock (3,000)	$35.90	June 12, 2016	3,000	Acquired
March 8, 2006	CENX	Stock Option (right to buy)	Common Stock (10,000)	$34.78	March 8, 2016	10,000	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).