Peter A Trpkovski

Insider

First SEC filing: July 3, 2023 · Latest: July 3, 2023

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 9 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

9 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 21, 2025	CENX	A	12,455	—	—	65,491 Direct	+23.48%	Acquired	(price as of 2026-08-19)
Feb. 7, 2025	CENX	F	4,501	$18.69	$84,124	53,036 Direct	-7.82%	Disposed	143.8% (price as of 2026-08-19)
Jan. 1, 2025	CENX	A	6,046	—	—	57,537 Direct	+11.74%	Acquired	(price as of 2026-08-19)
Dec. 31, 2024	CENX	F	703	$18.22	$12,809	51,491 Direct	-1.35%	Disposed	150.1% (price as of 2026-08-19)
Dec. 31, 2024	CENX	F	2,049	$18.22	$37,333	52,194 Direct	-3.78%	Disposed	150.1% (price as of 2026-08-19)
Dec. 31, 2024	CENX	A	4,624	—	—	54,243 Direct	+9.32%	Acquired	(price as of 2026-08-19)
Feb. 9, 2024	CENX	F	3,211	$10.42	$33,459	49,619 Direct	-6.08%	Disposed	337.2% (price as of 2026-08-19)
Jan. 1, 2024	CENX	A	11,841	—	—	52,830 Direct	+28.89%	Acquired	(price as of 2026-08-19)
Dec. 31, 2023	CENX	F	1,009	$12.14	$12,249	40,989 Direct	-2.40%	Disposed	275.3% (price as of 2026-08-19)
Dec. 28, 2023	CENX	S	13,908	$12.32	$171,347	41,998 Direct	-24.88%	Disposed	269.8% (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.

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

Date	Ticker	Security	Shares	Ownership
July 3, 2023	CENX	Common Stock	—	Direct