CENX US Equity

CENTURY ALUMINUM CO

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Materials · Primary Production of Aluminum · CIK 949157 · FYE 1231

$42.66

-1.30 (-2.96%)

USD · as of 2026-07-29 · marketstack

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Institutional ownership· 13F filers holding CENX · 2026-Q1 methodology → sources →

381 holders

% of shares outstanding held

101.6%

Shares held (13F)

100,518,273

Reporting holders

381

Institutional 13F holdings sum to 101.6% of shares outstanding. Readings above 100% reflect securities-lending double counting: shares on loan to short sellers are reported long by both the lending institution and the one that bought them. FINRA short interest of 8,181,214 shares (settlement 2026-04-30) accounts for the excess.

Top holders

largest 100 of 381 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	Glencore plc	29,690,70229.7M	$1.7B	30.00%	TRIM -18%
2	BlackRock, Inc.	9,010,3799.0M	$529M	9.10%	TRIM -5%
3	STATE STREET CORP	4,667,5404.7M	$274M	4.72%	ADD 9%
4	VANGUARD PORTFOLIO MANAGEMENT LLC	4,241,5574.2M	$249M	4.29%	NEW†
5	Sourcerock Group LLC	2,687,2492.7M	$158M	2.72%	TRIM -26%
6	FMR LLC	2,660,0542.7M	$156M	2.69%	ADD 30454%
7	VANGUARD CAPITAL MANAGEMENT LLC	2,586,1072.6M	$152M	2.61%	NEW†
8	DIMENSIONAL FUND ADVISORS LP	2,190,9222.2M	$129M	2.21%	TRIM -21%
9	Invesco Ltd.	2,076,5282.1M	$122M	2.10%	ADD 230%
10	MILLENNIUM MANAGEMENT LLC	1,987,6252.0M	$117M	2.01%	ADD 40%
11	Assenagon Asset Management S.A.	1,830,3241.8M	$107M	1.85%	ADD 110%
12	MORGAN STANLEY	1,585,2301.6M	$93M	1.60%	—
13	Encompass Capital Advisors LLC	1,551,3621.6M	$91M	1.57%	ADD 210%
14	GEODE CAPITAL MANAGEMENT, LLC	1,540,2121.5M	$90M	1.56%	ADD 17%
15	D. E. Shaw & Co., Inc.	1,433,3691.4M	$84M	1.45%	ADD 20%
16	JANE STREET GROUP, LLC	1,320,9421.3M	$78M	1.33%	ADD 3082%
17	CITADEL ADVISORS LLC	1,320,8671.3M	$78M	1.33%	ADD 89%
18	Impala Asset Management LLC	975,000975,000	$57M	0.99%	ADD 14%
19	Fisher Asset Management, LLC	851,301851,301	$50M	0.86%	—
20	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	800,131800,131	$47M	0.81%	TRIM -46%
21	Bridgewater Associates, LP	732,517732,517	$43M	0.74%	ADD 170%
22	VOLORIDGE INVESTMENT MANAGEMENT, LLC	720,735720,735	$42M	0.73%	TRIM -23%
23	BANK OF AMERICA CORP /DE/	608,794608,794	$36M	0.62%	ADD 98%
24	Allspring Global Investments Holdings, LLC	562,030562,030	$36M	0.57%	ADD 23%
25	DEUTSCHE BANK AG\	598,025598,025	$35M	0.60%	ADD 452%
26	Qube Research & Technologies Ltd	589,928589,928	$35M	0.60%	TRIM -19%
27	UBS Group AG	586,766586,766	$34M	0.59%	TRIM -47%
28	Mountaineer Partners Management, LLC	583,997583,997	$34M	0.59%	TRIM -4%
29	Point72 Asset Management, L.P.	569,451569,451	$33M	0.58%	ADD 230%
30	NORTHERN TRUST CORP	548,744548,744	$32M	0.55%	ADD 5%
31	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	544,511544,511	$32M	0.55%	—
32	Bornite Capital Management LP	542,000542,000	$32M	0.55%	ADD 117%
33	Kinetic Partners Management, LP	531,700531,700	$31M	0.54%	NEW
34	Merewether Investment Management, LP	514,800514,800	$30M	0.52%	NEW
35	Jefferies Financial Group Inc.	484,193484,193	$28M	0.49%	ADD 354%
36	JPMORGAN CHASE & CO	516,623516,623	$28M	0.52%	ADD 141%
37	Rokos Capital Management LLP	436,688436,688	$26M	0.44%	NEW
38	Squarepoint Ops LLC	410,093410,093	$24M	0.41%	ADD 1002%
39	GOLDMAN SACHS GROUP INC	379,148379,148	$22M	0.38%	TRIM -43%
40	WELLINGTON MANAGEMENT GROUP LLP	378,447378,447	$22M	0.38%	ADD 91%
41	VANGUARD FIDUCIARY TRUST CO	378,295378,295	$22M	0.38%	NEW
42	Westend Capital Management, LLC	378,073378,073	$22M	0.38%	—
43	Bank of New York Mellon Corp	335,864335,864	$20M	0.34%	—
44	Boston Partners	309,896309,896	$18M	0.31%	TRIM -48%
45	Nuveen, LLC	308,977308,977	$18M	0.31%	ADD 163%
46	BW Gestao de Investimentos Ltda.	308,758308,758	$18M	0.31%	ADD 68%
47	Engineers Gate Manager LP	297,509297,509	$17M	0.30%	ADD 501%
48	PICTON MAHONEY ASSET MANAGEMENT	295,330295,330	$17M	0.30%	NEW
49	Nicholas Investment Partners, LP	292,402292,402	$17M	0.30%	—
50	Drummond Knight Asset Management Pty Ltd	281,092281,092	$16M	0.28%	TRIM -10%
51	TUDOR INVESTMENT CORP ET AL	279,161279,161	$16M	0.28%	TRIM -24%
52	Steamboat Capital Partners, LLC	276,248276,248	$16M	0.28%	TRIM -35%
53	CANADA LIFE ASSURANCE Co	275,405275,405	$16M	0.28%	ADD 136%
54	ROYCE & ASSOCIATES LP	264,341264,341	$16M	0.27%	TRIM -16%
55	PRINCIPAL FINANCIAL GROUP INC	260,426260,426	$15M	0.26%	TRIM -35%
56	CONGRESS ASSET MANAGEMENT CO	253,435253,435	$15M	0.26%	ADD 23%
57	CDC Financial, Inc.	246,680246,680	$14M	0.25%	TRIM -28%
58	Public Sector Pension Investment Board	243,897243,897	$14M	0.25%	ADD 32%
59	AMERICAN CENTURY COMPANIES INC	232,034232,034	$14M	0.23%	TRIM -76%
60	BANK OF MONTREAL /CAN/	227,736227,736	$13M	0.23%	ADD 561%
61	Yaupon Capital Management LP	211,201211,201	$12M	0.21%	NEW
62	HRT FINANCIAL LP	195,992195,992	$12M	0.20%	ADD 167%
63	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	184,061184,061	$11M	0.19%	ADD 220%
64	ICON ADVISERS INC/CO	173,200173,200	$10M	0.17%	TRIM -28%
65	AQR CAPITAL MANAGEMENT LLC	166,233166,233	$10M	0.17%	ADD 155%
66	First Eagle Investment Management, LLC	163,087163,087	$10M	0.16%	TRIM -46%
67	CIBC WORLD MARKET INC.	160,632160,632	$9M	0.16%	NEW
68	RHUMBLINE ADVISERS	158,208158,208	$9M	0.16%	ADD 5%
69	SYSTEMATIC FINANCIAL MANAGEMENT LP	157,722157,722	$9M	0.16%	TRIM -5%
70	CSM Advisors, LLC	155,684155,684	$9M	0.16%	TRIM -31%
71	WELLS FARGO & COMPANY/MN	151,938151,938	$9M	0.15%	TRIM -26%
72	Burkehill Global Management, LP	150,000150,000	$9M	0.15%	TRIM -70%
73	Insight Wealth Strategies, LLC	146,024146,024	$9M	0.15%	TRIM -5%
74	BARCLAYS PLC	143,299143,299	$8M	0.14%	ADD 37%
75	RENAISSANCE TECHNOLOGIES LLC	139,499139,499	$8M	0.14%	ADD 18%
76	FRANKLIN RESOURCES INC	124,816124,816	$7M	0.13%	ADD 163%
77	COHEN & STEERS, INC.	118,183118,183	$7M	0.12%	TRIM -17%
78	BNP PARIBAS FINANCIAL MARKETS	113,252113,252	$7M	0.11%	ADD 14%
79	Legal & General Group Plc	112,563112,563	$7M	0.11%	TRIM -10%
80	Swiss National Bank	110,450110,450	$6M	0.11%	—
81	RAYMOND JAMES FINANCIAL INC	109,592109,592	$6M	0.11%	TRIM -16%
82	ALLIANCEBERNSTEIN L.P.	159,508159,508	$6M	0.16%	ADD 112%
83	Edgestream Partners, L.P.	105,739105,739	$6M	0.11%	TRIM -33%
84	BESSEMER GROUP INC	102,496102,496	$6M	0.10%	—
85	AMERIPRISE FINANCIAL INC	100,631100,631	$6M	0.10%	ADD 3%
86	STATE OF WISCONSIN INVESTMENT BOARD	100,242100,242	$6M	0.10%	TRIM -42%
87	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	96,31796,317	$6M	0.10%	TRIM -87%
88	Balyasny Asset Management L.P.	95,06895,068	$6M	0.10%	NEW
89	Portolan Capital Management, LLC	95,03995,039	$6M	0.10%	NEW
90	Y-Intercept (Hong Kong) Ltd	90,40090,400	$5M	0.09%	TRIM -36%
91	CAXTON ASSOCIATES LLP	88,69088,690	$5M	0.09%	TRIM -13%
92	Informed Momentum Co LLC	85,71485,714	$5M	0.09%	TRIM -9%
93	BOOTHBAY FUND MANAGEMENT, LLC	82,94582,945	$5M	0.08%	TRIM -44%
94	ENVESTNET ASSET MANAGEMENT INC	82,82282,822	$5M	0.08%	ADD 10%
95	MOORE CAPITAL MANAGEMENT, LP	82,75282,752	$5M	0.08%	NEW
96	GeoSphere Capital Management, LLC	82,00082,000	$5M	0.08%	NEW
97	SUSQUEHANNA INTERNATIONAL GROUP, LLP	78,47278,472	$5M	0.08%	TRIM -63%
98	NEUBERGER BERMAN GROUP LLC	73,15173,151	$4M	0.07%	ADD 471%
99	PRUDENTIAL FINANCIAL INC	73,07873,078	$4M	0.07%	ADD 45%
100	SEGALL BRYANT & HAMILL, LLC	72,08572,085	$4M	0.07%	TRIM -28%

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

Glencore plc

40.0M

40.1M

36.0M

29.7M

$1.7B

BlackRock, Inc.

10.5M

9.9M

10.2M

10.1M

9.5M

9.0M

$529M

STATE STREET CORP

3.3M

3.2M

3.7M

4.2M

4.3M

4.7M

$274M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

4.2M

$249M

Sourcerock Group LLC

294K

200K

1.4M

2.6M

3.6M

2.7M

$158M

FMR LLC

2.7M

$156M

VANGUARD CAPITAL MANAGEMENT LLC

—

2.6M

$152M

DIMENSIONAL FUND ADVISORS LP

2.9M

2.8M

3.1M

2.8M

2.2M

$129M

Invesco Ltd.

1.9M

936K

537K

850K

629K

2.1M

$122M

MILLENNIUM MANAGEMENT LLC

458K

34K

513K

443K

1.4M

2.0M

$117M

Assenagon Asset Management S.A.

390K

298K

201K

408K

873K

1.8M

$107M

MORGAN STANLEY

1.0M

1.1M

848K

1.4M

1.6M

$93M

Encompass Capital Advisors LLC

—

750K

105K

811K

500K

1.6M

$91M

GEODE CAPITAL MANAGEMENT, LLC

1.3M

1.5M

$90M

D. E. Shaw & Co., Inc.

135K

28K

269K

202K

1.2M

1.4M

$84M

Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	381	100,518,273	101.6%	$5.9B
2025-Q4

Short interest has its own tab now — open SI →

Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.

Activists & large holders· Schedule 13D/G beneficial owners · CENX

Activists — 13D, active intent

GLENCORE INTERNATIONAL AG29.99%▼ -6.61ppSCHEDULE 13D/A · Amd 30 · event 2026-03-04SEC →

29,690,702 shares · 3 reporting persons

“The Reporting Persons remain confident in the management team and outlook of the Company, maintain a position in the Company and intend to continue to hold Common Stock for investment purposes. On March 4, 2026, the Reporting Persons monetized a portion of their investment via a sale of 6,315,245 shares in a block trade pursuant to Rule 144 and subject to customary conditions (the "Subject Sale"). The Reporting Persons may purchase or sell additional shares of Common Stock and other securities o”

Large holders — 13G, passive (top 2 by % of class)

Holder	% of class	Type	As of
BlackRock, Inc.	9.5%	QII	2026-06-30	SEC →
VANGUARD GROUP INC	0%	QII	2026-03-13	SEC →

Institutional ownership· 13F filers holding CENX · 2026-Q1 methodology → sources →

381 holders

% of shares outstanding held

101.6%

Shares held (13F)

100,518,273

Reporting holders

381

Top holders

largest 100 of 381 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	Glencore plc	29,690,70229.7M	$1.7B	30.00%	TRIM -18%
2	BlackRock, Inc.	9,010,3799.0M	$529M	9.10%	TRIM -5%
3	STATE STREET CORP	4,667,5404.7M	$274M	4.72%	ADD 9%
4	VANGUARD PORTFOLIO MANAGEMENT LLC	4,241,5574.2M	$249M	4.29%	NEW†
5	Sourcerock Group LLC	2,687,2492.7M	$158M	2.72%	TRIM -26%
6	FMR LLC	2,660,0542.7M	$156M	2.69%	ADD 30454%
7	VANGUARD CAPITAL MANAGEMENT LLC	2,586,1072.6M	$152M	2.61%	NEW†
8	DIMENSIONAL FUND ADVISORS LP	2,190,9222.2M	$129M	2.21%	TRIM -21%
9	Invesco Ltd.	2,076,5282.1M	$122M	2.10%	ADD 230%
10	MILLENNIUM MANAGEMENT LLC	1,987,6252.0M	$117M	2.01%	ADD 40%
11	Assenagon Asset Management S.A.	1,830,3241.8M	$107M	1.85%	ADD 110%
12	MORGAN STANLEY	1,585,2301.6M	$93M	1.60%	—
13	Encompass Capital Advisors LLC	1,551,3621.6M	$91M	1.57%	ADD 210%
14	GEODE CAPITAL MANAGEMENT, LLC	1,540,2121.5M	$90M	1.56%	ADD 17%
15	D. E. Shaw & Co., Inc.	1,433,3691.4M	$84M	1.45%	ADD 20%
16	JANE STREET GROUP, LLC	1,320,9421.3M	$78M	1.33%	ADD 3082%
17	CITADEL ADVISORS LLC	1,320,8671.3M	$78M	1.33%	ADD 89%
18	Impala Asset Management LLC	975,000975,000	$57M	0.99%	ADD 14%
19	Fisher Asset Management, LLC	851,301851,301	$50M	0.86%	—
20	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	800,131800,131	$47M	0.81%	TRIM -46%
21	Bridgewater Associates, LP	732,517732,517	$43M	0.74%	ADD 170%
22	VOLORIDGE INVESTMENT MANAGEMENT, LLC	720,735720,735	$42M	0.73%	TRIM -23%
23	BANK OF AMERICA CORP /DE/	608,794608,794	$36M	0.62%	ADD 98%
24	Allspring Global Investments Holdings, LLC	562,030562,030	$36M	0.57%	ADD 23%
25	DEUTSCHE BANK AG\	598,025598,025	$35M	0.60%	ADD 452%
26	Qube Research & Technologies Ltd	589,928589,928	$35M	0.60%	TRIM -19%
27	UBS Group AG	586,766586,766	$34M	0.59%	TRIM -47%
28	Mountaineer Partners Management, LLC	583,997583,997	$34M	0.59%	TRIM -4%
29	Point72 Asset Management, L.P.	569,451569,451	$33M	0.58%	ADD 230%
30	NORTHERN TRUST CORP	548,744548,744	$32M	0.55%	ADD 5%
31	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	544,511544,511	$32M	0.55%	—
32	Bornite Capital Management LP	542,000542,000	$32M	0.55%	ADD 117%
33	Kinetic Partners Management, LP	531,700531,700	$31M	0.54%	NEW
34	Merewether Investment Management, LP	514,800514,800	$30M	0.52%	NEW
35	Jefferies Financial Group Inc.	484,193484,193	$28M	0.49%	ADD 354%
36	JPMORGAN CHASE & CO	516,623516,623	$28M	0.52%	ADD 141%
37	Rokos Capital Management LLP	436,688436,688	$26M	0.44%	NEW
38	Squarepoint Ops LLC	410,093410,093	$24M	0.41%	ADD 1002%
39	GOLDMAN SACHS GROUP INC	379,148379,148	$22M	0.38%	TRIM -43%
40	WELLINGTON MANAGEMENT GROUP LLP	378,447378,447	$22M	0.38%	ADD 91%
41	VANGUARD FIDUCIARY TRUST CO	378,295378,295	$22M	0.38%	NEW
42	Westend Capital Management, LLC	378,073378,073	$22M	0.38%	—
43	Bank of New York Mellon Corp	335,864335,864	$20M	0.34%	—
44	Boston Partners	309,896309,896	$18M	0.31%	TRIM -48%
45	Nuveen, LLC	308,977308,977	$18M	0.31%	ADD 163%
46	BW Gestao de Investimentos Ltda.	308,758308,758	$18M	0.31%	ADD 68%
47	Engineers Gate Manager LP	297,509297,509	$17M	0.30%	ADD 501%
48	PICTON MAHONEY ASSET MANAGEMENT	295,330295,330	$17M	0.30%	NEW
49	Nicholas Investment Partners, LP	292,402292,402	$17M	0.30%	—
50	Drummond Knight Asset Management Pty Ltd	281,092281,092	$16M	0.28%	TRIM -10%
51	TUDOR INVESTMENT CORP ET AL	279,161279,161	$16M	0.28%	TRIM -24%
52	Steamboat Capital Partners, LLC	276,248276,248	$16M	0.28%	TRIM -35%
53	CANADA LIFE ASSURANCE Co	275,405275,405	$16M	0.28%	ADD 136%
54	ROYCE & ASSOCIATES LP	264,341264,341	$16M	0.27%	TRIM -16%
55	PRINCIPAL FINANCIAL GROUP INC	260,426260,426	$15M	0.26%	TRIM -35%
56	CONGRESS ASSET MANAGEMENT CO	253,435253,435	$15M	0.26%	ADD 23%
57	CDC Financial, Inc.	246,680246,680	$14M	0.25%	TRIM -28%
58	Public Sector Pension Investment Board	243,897243,897	$14M	0.25%	ADD 32%
59	AMERICAN CENTURY COMPANIES INC	232,034232,034	$14M	0.23%	TRIM -76%
60	BANK OF MONTREAL /CAN/	227,736227,736	$13M	0.23%	ADD 561%
61	Yaupon Capital Management LP	211,201211,201	$12M	0.21%	NEW
62	HRT FINANCIAL LP	195,992195,992	$12M	0.20%	ADD 167%
63	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	184,061184,061	$11M	0.19%	ADD 220%
64	ICON ADVISERS INC/CO	173,200173,200	$10M	0.17%	TRIM -28%
65	AQR CAPITAL MANAGEMENT LLC	166,233166,233	$10M	0.17%	ADD 155%
66	First Eagle Investment Management, LLC	163,087163,087	$10M	0.16%	TRIM -46%
67	CIBC WORLD MARKET INC.	160,632160,632	$9M	0.16%	NEW
68	RHUMBLINE ADVISERS	158,208158,208	$9M	0.16%	ADD 5%
69	SYSTEMATIC FINANCIAL MANAGEMENT LP	157,722157,722	$9M	0.16%	TRIM -5%
70	CSM Advisors, LLC	155,684155,684	$9M	0.16%	TRIM -31%
71	WELLS FARGO & COMPANY/MN	151,938151,938	$9M	0.15%	TRIM -26%
72	Burkehill Global Management, LP	150,000150,000	$9M	0.15%	TRIM -70%
73	Insight Wealth Strategies, LLC	146,024146,024	$9M	0.15%	TRIM -5%
74	BARCLAYS PLC	143,299143,299	$8M	0.14%	ADD 37%
75	RENAISSANCE TECHNOLOGIES LLC	139,499139,499	$8M	0.14%	ADD 18%
76	FRANKLIN RESOURCES INC	124,816124,816	$7M	0.13%	ADD 163%
77	COHEN & STEERS, INC.	118,183118,183	$7M	0.12%	TRIM -17%
78	BNP PARIBAS FINANCIAL MARKETS	113,252113,252	$7M	0.11%	ADD 14%
79	Legal & General Group Plc	112,563112,563	$7M	0.11%	TRIM -10%
80	Swiss National Bank	110,450110,450	$6M	0.11%	—
81	RAYMOND JAMES FINANCIAL INC	109,592109,592	$6M	0.11%	TRIM -16%
82	ALLIANCEBERNSTEIN L.P.	159,508159,508	$6M	0.16%	ADD 112%
83	Edgestream Partners, L.P.	105,739105,739	$6M	0.11%	TRIM -33%
84	BESSEMER GROUP INC	102,496102,496	$6M	0.10%	—
85	AMERIPRISE FINANCIAL INC	100,631100,631	$6M	0.10%	ADD 3%
86	STATE OF WISCONSIN INVESTMENT BOARD	100,242100,242	$6M	0.10%	TRIM -42%
87	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	96,31796,317	$6M	0.10%	TRIM -87%
88	Balyasny Asset Management L.P.	95,06895,068	$6M	0.10%	NEW
89	Portolan Capital Management, LLC	95,03995,039	$6M	0.10%	NEW
90	Y-Intercept (Hong Kong) Ltd	90,40090,400	$5M	0.09%	TRIM -36%
91	CAXTON ASSOCIATES LLP	88,69088,690	$5M	0.09%	TRIM -13%
92	Informed Momentum Co LLC	85,71485,714	$5M	0.09%	TRIM -9%
93	BOOTHBAY FUND MANAGEMENT, LLC	82,94582,945	$5M	0.08%	TRIM -44%
94	ENVESTNET ASSET MANAGEMENT INC	82,82282,822	$5M	0.08%	ADD 10%
95	MOORE CAPITAL MANAGEMENT, LP	82,75282,752	$5M	0.08%	NEW
96	GeoSphere Capital Management, LLC	82,00082,000	$5M	0.08%	NEW
97	SUSQUEHANNA INTERNATIONAL GROUP, LLP	78,47278,472	$5M	0.08%	TRIM -63%
98	NEUBERGER BERMAN GROUP LLC	73,15173,151	$4M	0.07%	ADD 471%
99	PRUDENTIAL FINANCIAL INC	73,07873,078	$4M	0.07%	ADD 45%
100	SEGALL BRYANT & HAMILL, LLC	72,08572,085	$4M	0.07%	TRIM -28%

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

Glencore plc

40.0M

40.1M

36.0M

29.7M

$1.7B

BlackRock, Inc.

10.5M

9.9M

10.2M

10.1M

9.5M

9.0M

$529M

STATE STREET CORP

3.3M

3.2M

3.7M

4.2M

4.3M

4.7M

$274M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

4.2M

$249M

Sourcerock Group LLC

294K

200K

1.4M

2.6M

3.6M

2.7M

$158M

FMR LLC

2.7M

$156M

VANGUARD CAPITAL MANAGEMENT LLC

—

2.6M

$152M

DIMENSIONAL FUND ADVISORS LP

2.9M

2.8M

3.1M

2.8M

2.2M

$129M

Invesco Ltd.

1.9M

936K

537K

850K

629K

2.1M

$122M

MILLENNIUM MANAGEMENT LLC

458K

34K

513K

443K

1.4M

2.0M

$117M

Assenagon Asset Management S.A.

390K

298K

201K

408K

873K

1.8M

$107M

MORGAN STANLEY

1.0M

1.1M

848K

1.4M

1.6M

$93M

Encompass Capital Advisors LLC

—

750K

105K

811K

500K

1.6M

$91M

GEODE CAPITAL MANAGEMENT, LLC

1.3M

1.5M

$90M

D. E. Shaw & Co., Inc.

135K

28K

269K

202K

1.2M

1.4M

$84M

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	381	100,518,273	101.6%	$5.9B
2025-Q4

Short interest has its own tab now — open SI →

Activists & large holders· Schedule 13D/G beneficial owners · CENX

Activists — 13D, active intent

GLENCORE INTERNATIONAL AG29.99%▼ -6.61ppSCHEDULE 13D/A · Amd 30 · event 2026-03-04SEC →

29,690,702 shares · 3 reporting persons

Large holders — 13G, passive (top 2 by % of class)

Holder	% of class	Type	As of
BlackRock, Inc.	9.5%	QII	2026-06-30	SEC →
VANGUARD GROUP INC	0%	QII	2026-03-13	SEC →

CENX US Equity☆

Institutional ownership· 13F filers holding CENX · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · CENX

Institutional ownership· 13F filers holding CENX · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · CENX

CENX US Equity