John C Fontaine

CIK 1200087 · View on SEC EDGAR ↗

Insider

First SEC filing: Sept. 7, 2010 · Latest: Sept. 7, 2010

On this page

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 selling Sept. 2, 2010

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 21 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

21 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 8, 2011	CENX	A	4,565	—	—	21,427 Direct	+27.07%	Acquired	(price as of 2026-08-21)
Sept. 2, 2010	CENX	S	6,000	$10.70	$64,200	16,862 Direct	-26.24%	Disposed	320.2% (price as of 2026-08-21)
June 9, 2010	CENX	A	6,732	—	—	22,862 Direct	+41.74%	Acquired	(price as of 2026-08-21)
May 28, 2009	CENX	A	13,833	—	—	16,130 Direct	+602.22%	Acquired	(price as of 2026-08-21)
Oct. 23, 2008	CENX	P	1,000	$11.85	$11,850	2,297 Direct	+77.10%	Acquired	279.4% (price as of 2026-08-21)
June 25, 2008	CENX	A	1,047	—	—	1,297 Direct	+418.80%	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)
Aug. 11, 2005	CENX	A	3,000	—	—	3,000 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 2, 2004	CENX	M	2,000	$11.59	$23,180	0 Direct	-100.00%	Disposed	287.9% (price as of 2026-08-21)
Sept. 2, 2004	CENX	M	1,500	$7.03	$10,545	0 Direct	-100.00%	Disposed	539.5% (price as of 2026-08-21)
Sept. 2, 2004	CENX	M	1,500	$16.72	$25,080	0 Direct	-100.00%	Disposed	168.9% (price as of 2026-08-21)
Sept. 2, 2004	CENX	M	1,500	$16.56	$24,840	0 Direct	-100.00%	Disposed	171.5% (price as of 2026-08-21)
Sept. 2, 2004	CENX	M	1,105	$15.12	$16,708	0 Direct	-100.00%	Disposed	197.4% (price as of 2026-08-21)
Sept. 2, 2004	CENX	S	2,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Sept. 2, 2004	CENX	M	2,000	$11.59	$23,180	2,000 Direct	—	Acquired	287.9% (price as of 2026-08-21)
Sept. 2, 2004	CENX	S	1,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Sept. 2, 2004	CENX	M	1,500	$7.03	$10,545	1,500 Direct	—	Acquired	539.5% (price as of 2026-08-21)
Sept. 2, 2004	CENX	S	1,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Sept. 2, 2004	CENX	M	1,500	$16.72	$25,080	1,500 Direct	—	Acquired	168.9% (price as of 2026-08-21)
Sept. 2, 2004	CENX	S	1,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Sept. 2, 2004	CENX	M	1,500	$16.56	$24,840	1,500 Direct	—	Acquired	171.5% (price as of 2026-08-21)
Sept. 2, 2004	CENX	S	1,105	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Sept. 2, 2004	CENX	M	1,105	$15.12	$16,708	1,105 Direct	—	Acquired	197.4% (price as of 2026-08-21)
Sept. 1, 2004	CENX	M	8,895	$15.12	$134,492	1,105 Direct	-88.95%	Disposed	197.4% (price as of 2026-08-21)
Sept. 1, 2004	CENX	S	8,895	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Sept. 1, 2004	CENX	M	8,895	$15.12	$134,492	8,895 Direct	—	Acquired	197.4% (price as of 2026-08-21)
July 19, 2004	CENX	A	3,000	—	—	3,000 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)	$35.90	June 12, 2016	3,000	Acquired
June 12, 2006	CENX	Stock Option	Common Stock (3,000)	$37.31	June 12, 2016	3,000	Acquired
Aug. 11, 2005	CENX	Stock Option (right to buy)	Common Stock (3,000)	$26.70	Aug. 11, 2015	3,000	Acquired
Sept. 2, 2004	CENX	Non-Employee Director Stock Option (Right to Buy)	Common Stock (2,000)	$11.59	June 5, 2010	2,000	Disposed
Sept. 2, 2004	CENX	Non-Employee Director Stock Option (Right to Buy)	Common Stock (1,500)	$7.03	June 9, 2009	1,500	Disposed
Sept. 2, 2004	CENX	Non-Employee Director Stock Option (Right to Buy)	Common Stock (1,500)	$16.72	May 5, 2008	1,500	Disposed
Sept. 2, 2004	CENX	Non-Employee Director Stock Option (Right to Buy)	Common Stock (1,500)	$16.56	May 14, 2007	1,500	Disposed
Sept. 2, 2004	CENX	Non-Employee Director Stock Option (Right to Buy)	Common Stock (1,105)	$15.12	May 28, 2006	1,105	Disposed
Sept. 1, 2004	CENX	Non-Employee Director Stock Option (Right to Buy)	Common Stock (8,895)	$15.12	May 28, 2006	8,895	Disposed
July 19, 2004	CENX	Non-Employee Director Stock Option (Right to Buy)	Common Stock (3,000)	$24.10	July 19, 2014	3,000	Acquired

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