Robert F Hoffman

Insider

First SEC filing: June 9, 2021 · Latest: June 9, 2021

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.
Initial holdings The stakes this person held when they first started reporting.

Insider at

CENX selling March 20, 2025

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 20 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

20 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 20, 2025	CENX	S	5,000	$20.24	$101,200	59,083 Direct	-7.80%	Disposed	125.1% (price as of 2026-08-19)
March 14, 2025	CENX	S	2,500	$19.99	$49,975	64,083 Direct	-3.75%	Disposed	127.9% (price as of 2026-08-19)
Jan. 1, 2025	CENX	A	8,257	—	—	66,583 Direct	+14.16%	Acquired	(price as of 2026-08-19)
Dec. 31, 2024	CENX	F	1,852	$18.22	$33,743	58,326 Direct	-3.08%	Disposed	150.1% (price as of 2026-08-19)
Dec. 31, 2024	CENX	F	5,401	$18.22	$98,406	60,178 Direct	-8.24%	Disposed	150.1% (price as of 2026-08-19)
Dec. 31, 2024	CENX	A	13,723	—	—	65,579 Direct	+26.46%	Acquired	(price as of 2026-08-19)
Jan. 1, 2024	CENX	A	14,472	—	—	51,856 Direct	+38.71%	Acquired	(price as of 2026-08-19)
Dec. 31, 2023	CENX	F	2,519	$12.14	$30,581	37,384 Direct	-6.31%	Disposed	275.3% (price as of 2026-08-19)
Dec. 31, 2023	CENX	F	1,075	$12.14	$13,050	39,903 Direct	-2.62%	Disposed	275.3% (price as of 2026-08-19)
Dec. 31, 2023	CENX	A	2,425	—	—	40,978 Direct	+6.29%	Acquired	(price as of 2026-08-19)
Dec. 21, 2023	CENX	S	9,000	$12.08	$108,720	38,553 Direct	-18.93%	Disposed	277.2% (price as of 2026-08-19)
Dec. 20, 2023	CENX	S	3,000	$12.00	$36,000	47,553 Direct	-5.93%	Disposed	279.7% (price as of 2026-08-19)
Jan. 1, 2023	CENX	A	15,825	—	—	50,553 Direct	+45.57%	Acquired	(price as of 2026-08-19)
Dec. 30, 2022	CENX	F	3,745	$8.18	$30,634	34,728 Direct	-9.73%	Disposed	457.0% (price as of 2026-08-19)
Dec. 30, 2022	CENX	F	4,846	$8.18	$39,640	38,473 Direct	-11.19%	Disposed	457.0% (price as of 2026-08-19)
Dec. 30, 2022	CENX	A	10,939	—	—	43,319 Direct	+33.78%	Acquired	(price as of 2026-08-19)
March 4, 2022	CENX	S	3,480	$29.19	$101,581	32,380 Direct	-9.70%	Disposed	56.1% (price as of 2026-08-19)
Jan. 1, 2022	CENX	A	4,706	—	—	35,860 Direct	+15.11%	Acquired	(price as of 2026-08-19)
Dec. 31, 2021	CENX	F	7,077	$16.56	$117,195	31,154 Direct	-18.51%	Disposed	175.1% (price as of 2026-08-19)
Dec. 31, 2021	CENX	A	15,976	—	—	38,231 Direct	+71.79%	Acquired	(price as of 2026-08-19)
Dec. 31, 2021	CENX	F	3,290	$16.56	$54,482	22,255 Direct	-12.88%	Disposed	175.1% (price as of 2026-08-19)
April 16, 2014	CENX	F	355	$13.85	$4,917	8,814 Direct	-3.87%	Disposed	229.0% (price as of 2026-08-19)
March 24, 2014	CENX	A	2,451	—	—	9,192 Direct	+36.36%	Acquired	(price as of 2026-08-19)
March 24, 2014	CENX	A	2,428	—	—	9,169 Direct	+36.02%	Acquired	(price as of 2026-08-19)
March 22, 2014	CENX	F	283	$12.49	$3,535	6,741 Direct	-4.03%	Disposed	264.8% (price as of 2026-08-19)

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.

Initial ownership (Form 3) 12 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
June 9, 2021	CENX	Common Stock	—	Direct
June 9, 2021	CENX	Common Stock	—	Indirect
April 2, 2014	CENX	Common Stock	—	Direct
April 2, 2014	CENX	Common Stock	—	Indirect
April 2, 2014	CENX	Employee Stock Option (Right to Buy)→ Common Stock (1,333)	1,333	Direct
April 2, 2014	CENX	Employee Stock Option (Right to Buy)→ Common Stock (2,000)	2,000	Direct
April 2, 2014	CENX	Employee Stock Option (Right to Buy)→ Common Stock (2,958)	2,958	Direct
April 1, 2014	CENX	Common Stock	—	Direct
April 1, 2014	CENX	Common Stock	—	Indirect
April 1, 2014	CENX	Employee Stock Option (Right to Buy)→ Common Stock (1,333)	1,333	Direct
April 1, 2014	CENX	Employee Stock Option (Right to Buy)→ Common Stock (2,000)	2,000	Direct
April 1, 2014	CENX	Employee Stock Option (Right to Buy)→ Common Stock (2,958)	2,958	Direct