Century Aluminum (CENX)
Century Aluminum on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as primary production of aluminum.
9.2M
Short interest
settlement 2026-09-30
5.1
Days to cover
-1.3 days vs prior
63.7%
Short share of volume
2026-10-12
803
Fails to deliver
settlement 2026-09-02
Fri 20 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-10-12.
Short interest
FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSONAs of 30 September 2026, short interest in CENX is 9,181,883 shares, down 1,001,886 shares over the last month. Over the last 48 readings it ranged from 4,231,339 shares (29 November 2024) to 10,183,769 shares (31 August 2026). At the reported average volume of 1.8M shares a day that is 5.1 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/cenx" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-30 | 9,181,883 | -5.4% | 1,813,279 | 5.06 |
| 2026-09-15 | 9,701,397 | -4.7% | 1,530,081 | 6.34 |
| 2026-08-31 | 10,183,769 | +10.9% | 1,972,812 | 5.16 |
| 2026-08-14 | 9,181,113 | -7.4% | 2,377,399 | 3.86 |
| 2026-07-31 | 9,917,565 | +1.4% | 1,732,698 | 5.72 |
| 2026-07-15 | 9,776,994 | +2.5% | 1,911,705 | 5.11 |
| 2026-06-30 | 9,533,604 | +15.5% | 3,081,591 | 3.09 |
| 2026-06-15 | 8,254,255 | +2.6% | 1,988,989 | 4.15 |
| 2026-05-29 | 8,044,208 | -1.7% | 1,814,735 | 4.43 |
| 2026-05-15 | 8,184,268 | +0.0% | 1,686,652 | 4.85 |
| 2026-04-30 | 8,181,214 | +0.9% | 1,180,443 | 6.93 |
| 2026-04-15 | 8,111,770 | +7.2% | 1,913,513 | 4.24 |
| 2026-03-31 | 7,567,705 | -3.2% | 2,665,984 | 2.84 |
| 2026-03-13 | 7,815,330 | -2.9% | 2,485,771 | 3.14 |
| 2026-02-27 | 8,050,474 | +0.5% | 2,539,603 | 3.17 |
| 2026-02-13 | 8,014,287 | -4.3% | 2,377,912 | 3.37 |
| 2026-01-30 | 8,370,550 | -0.6% | 2,215,527 | 3.78 |
| 2026-01-15 | 8,420,925 | +10.6% | 2,268,355 | 3.71 |
| 2025-12-31 | 7,613,184 | +0.6% | 1,700,809 | 4.48 |
| 2025-12-15 | 7,571,512 | +2.5% | 1,780,155 | 4.25 |
| 2025-11-28 | 7,383,912 | -5.2% | 1,972,640 | 3.74 |
| 2025-11-14 | 7,790,787 | +3.8% | 3,337,101 | 2.33 |
| 2025-10-31 | 7,502,754 | -7.1% | 2,268,735 | 3.31 |
| 2025-10-15 | 8,078,532 | +20.1% | 2,068,669 | 3.91 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 12 October 2026, the short share of CENX volume is 63.7%, up 21.0 points over the last five sessions. Over the last 30 readings it ranged from 41.9% (7 October 2026) to 69.1% (31 August 2026). The latest reading is 7.5 points above the 30-session average of 56.3%, on 483K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-12 | 308K | 483K | 63.7% | 264 |
| 2026-10-09 | 187K | 331K | 56.6% | 9 |
| 2026-10-08 | 286K | 515K | 55.5% | 17 |
| 2026-10-07 | 296K | 705K | 41.9% | 3,544 |
| 2026-10-06 | 254K | 383K | 66.4% | 2 |
| 2026-10-05 | 261K | 610K | 42.7% | 0 |
| 2026-10-02 | 422K | 799K | 52.9% | 3,094 |
| 2026-10-01 | 301K | 698K | 43.2% | 4,417 |
| 2026-09-30 | 293K | 562K | 52.2% | 30 |
| 2026-09-29 | 481K | 868K | 55.4% | 99 |
| 2026-09-28 | 358K | 791K | 45.3% | 109 |
| 2026-09-25 | 172K | 359K | 48.0% | 88 |
| 2026-09-24 | 258K | 437K | 59.1% | 1,167 |
| 2026-09-23 | 246K | 385K | 63.9% | 54 |
| 2026-09-22 | 222K | 382K | 58.2% | 4,010 |
| 2026-09-21 | 185K | 313K | 59.3% | 24 |
| 2026-09-18 | 316K | 526K | 60.0% | 24,377 |
| 2026-09-17 | 354K | 677K | 52.2% | 0 |
| 2026-09-16 | 314K | 574K | 54.7% | 8,718 |
| 2026-09-15 | 360K | 797K | 45.2% | 0 |
| 2026-09-14 | 397K | 661K | 60.0% | 280 |
| 2026-09-11 | 229K | 391K | 58.5% | 61 |
| 2026-09-10 | 539K | 954K | 56.5% | 620 |
| 2026-09-09 | 264K | 413K | 63.9% | 912 |
| 2026-09-08 | 322K | 555K | 58.1% | 810 |
| 2026-09-04 | 260K | 415K | 62.7% | 0 |
| 2026-09-03 | 362K | 586K | 61.8% | 4,662 |
| 2026-09-02 | 390K | 594K | 65.7% | 15 |
| 2026-09-01 | 392K | 708K | 55.4% | 153 |
| 2026-08-31 | 348K | 504K | 69.1% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 2 September 2026, the fails-to-deliver balance in CENX is 803 shares, down 18,426 shares over the last settlement date. Over the last 30 readings it ranged from 3 shares (16 July 2026) to 2,640,213 shares (5 March 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-02 | 803 | $46.78 | $38K |
| 2026-08-28 | 19,229 | $45.89 | $882K |
| 2026-08-24 | 270 | $43.92 | $12K |
| 2026-08-07 | 7 | $45.95 | $322 |
| 2026-08-06 | 26 | $46.90 | $1K |
| 2026-07-31 | 261 | $44.88 | $12K |
| 2026-07-23 | 144 | $45.33 | $7K |
| 2026-07-16 | 3 | $43.94 | $132 |
| 2026-07-10 | 77 | $45.11 | $3K |
| 2026-07-08 | 1,124 | $45.28 | $51K |
| 2026-07-06 | 7,978 | $43.76 | $349K |
| 2026-07-02 | 8,141 | $43.03 | $350K |
| 2026-07-01 | 2,413 | $46.01 | $111K |
| 2026-06-30 | 287 | $46.55 | $13K |
| 2026-06-29 | 2,263 | $46.33 | $105K |
| 2026-06-25 | 768 | $44.50 | $34K |
| 2026-06-18 | 54 | $54.31 | $3K |
| 2026-06-17 | 45,643 | $53.55 | $2.4M |
| 2026-06-08 | 8 | $60.12 | $481 |
| 2026-05-15 | 1,481 | $61.44 | $91K |
| 2026-05-13 | 33,175 | $63.27 | $2.1M |
| 2026-05-12 | 164 | $60.18 | $10K |
| 2026-04-28 | 6,755 | $61.63 | $416K |
| 2026-04-22 | 6,078 | $61.40 | $373K |
| 2026-04-17 | 446 | $65.61 | $29K |
| 2026-04-14 | 3,123 | $67.94 | $212K |
| 2026-03-23 | 200 | $48.97 | $10K |
| 2026-03-05 | 2,640,213 | $53.43 | $141.1M |
| 2026-02-20 | 7,125 | $52.50 | $374K |
| 2026-02-04 | 3,110 | $50.51 | $157K |
Insider trades
SEC Form 4, newest first, 50 of 100 shown. JSONNo open-market insider trades were reported for CENX in the last 90 days. The most recent filings are listed below. Latest filing: Olivier Tamla A (Director) on 2026-06-15.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-06-15 | Olivier Tamla A | Director | Grant | 2K | $0.00 | $0 | 32K |
| 2026-06-15 | Bush Jennifer Mary | Director | Grant | 2K | $0.00 | $0 | 49K |
| 2026-06-15 | Michelmore Andrew G | Director | Tax withholding | 652 | $54.55 | $36K | 91K |
| 2026-06-15 | Michelmore Andrew G | Director | Grant | 2K | $0.00 | $0 | 91K |
| 2026-06-15 | GLASSER ERROL | Director | Grant | 2K | $0.00 | $0 | 121K |
| 2026-06-15 | Berntzen Jarl | Director | Grant | 2K | $0.00 | $0 | 211K |
| 2026-03-25 | Trpkovski Peter A | EVP, CFO | Sell | 17K | $50.51 | $845K | 64K |
| 2026-03-16 | Gary Jesse E | President and CEO | Sell | 150K | $55.47 | $8.3M | 143K |
| 2026-03-12 | Calloway Kenneth L | SVP, Human Resources | Sell | 18K | $58.00 | $1.0M | 25K |
| 2026-03-11 | Hoffman Robert F | SVP, IT and CAO | Sell | 11K | $56.51 | $595K | 57K |
| 2026-03-04 | Glencore AG | TenPercentOwner | Sell | 6.3M | $51.75 | $326.8M | 12.2M |
| 2026-03-04 | GLENCORE INTERNATIONAL AG | 10% owner | Sell | 6.3M | $51.75 | $326.8M | 12.2M |
| 2026-03-04 | Hoffman Robert F | SVP, IT and CAO | Sell | 10K | $56.33 | $563K | 67K |
| 2026-03-03 | Aboud Matt | SVP, Strategy & Business Dev't | Sell | 3K | $52.67 | $156K | 65K |
| 2026-03-02 | Aboud Matt | SVP, Strategy & Business Dev't | Sell | 12K | $52.50 | $637K | 68K |
| 2026-02-27 | Hafberg Agust F | SVP & Chief Commercial Officer | Sell | 23K | $51.24 | $1.2M | 45K |
| 2026-02-25 | Gudlaugsson Gunnar | EVP - Global Operations | Sell | 43K | $54.10 | $2.3M | 136K |
| 2026-02-23 | DeZee John | EVP, GC and Secretary | Sell | 66K | $50.72 | $3.3M | 98K |
| 2026-02-09 | Trpkovski Peter A | EVP, CFO | Tax withholding | 4K | $54.36 | $230K | 81K |
| 2026-01-23 | Gary Jesse E | President and CEO | Sell | 150K | $48.19 | $7.2M | 293K |
| 2026-01-12 | Gary Jesse E | President and CEO | Gift | 315K | $0.00 | $0 | 443K |
| 2026-01-12 | Gary Jesse E | President and CEO | Gift | 315K | $0.00 | $0 | 277K |
| 2026-01-01 | Gary Jesse E | President and CEO | Grant | 57K | $0.00 | $0 | 592K |
| 2026-01-01 | Gudlaugsson Gunnar | EVP - Global Operations | Grant | 16K | $0.00 | $0 | 179K |
| 2026-01-01 | Hafberg Agust F | SVP & Chief Commercial Officer | Grant | 5K | $0.00 | $0 | 68K |
| 2026-01-01 | Trpkovski Peter A | EVP, CFO and Treasurer | Grant | 13K | $0.00 | $0 | 85K |
| 2026-01-01 | Hoffman Robert F | SVP, IT and CAO | Grant | 5K | $0.00 | $0 | 77K |
| 2026-01-01 | DeZee John | EVP, GC and Secretary | Grant | 10K | $0.00 | $0 | 164K |
| 2026-01-01 | Calloway Kenneth L | SVP, Human Resources | Grant | 5K | $0.00 | $0 | 43K |
| 2026-01-01 | Aboud Matt | SVP, Strategy & Business Dev't | Grant | 6K | $0.00 | $0 | 80K |
| 2025-12-31 | Gary Jesse E | President and CEO | Tax withholding | 68K | $39.18 | $2.7M | 534K |
| 2025-12-31 | Gary Jesse E | President and CEO | Tax withholding | 203K | $39.18 | $8.0M | 602K |
| 2025-12-31 | Gary Jesse E | President and CEO | Grant | 439K | $0.00 | $0 | 805K |
| 2025-12-31 | Gudlaugsson Gunnar | EVP - Global Operations | Tax withholding | 21K | $39.18 | $821K | 164K |
| 2025-12-31 | Gudlaugsson Gunnar | EVP - Global Operations | Tax withholding | 42K | $39.18 | $1.6M | 185K |
| 2025-12-31 | Gudlaugsson Gunnar | EVP - Global Operations | Grant | 83K | $0.00 | $0 | 227K |
| 2025-12-31 | Hafberg Agust F | SVP & Chief Commercial Officer | Tax withholding | 8K | $39.18 | $306K | 63K |
| 2025-12-31 | Hafberg Agust F | SVP & Chief Commercial Officer | Tax withholding | 16K | $39.18 | $612K | 71K |
| 2025-12-31 | Hafberg Agust F | SVP & Chief Commercial Officer | Grant | 31K | $0.00 | $0 | 86K |
| 2025-12-31 | Trpkovski Peter A | EVP, CFO and Treasurer | Tax withholding | 4K | $39.18 | $158K | 72K |
| 2025-12-31 | Trpkovski Peter A | EVP, CFO and Treasurer | Tax withholding | 8K | $39.18 | $317K | 76K |
| 2025-12-31 | Trpkovski Peter A | EVP, CFO and Treasurer | Grant | 18K | $0.00 | $0 | 84K |
| 2025-12-31 | Hoffman Robert F | SVP, IT and CAO | Tax withholding | 6K | $39.18 | $244K | 72K |
| 2025-12-31 | Hoffman Robert F | SVP, IT and CAO | Tax withholding | 12K | $39.18 | $488K | 78K |
| 2025-12-31 | Hoffman Robert F | SVP, IT and CAO | Grant | 32K | $0.00 | $0 | 91K |
| 2025-12-31 | DeZee John | EVP, GC and Secretary | Tax withholding | 12K | $39.18 | $469K | 154K |
| 2025-12-31 | DeZee John | EVP, GC and Secretary | Tax withholding | 21K | $39.18 | $829K | 166K |
| 2025-12-31 | DeZee John | EVP, GC and Secretary | Grant | 54K | $0.00 | $0 | 187K |
| 2025-12-31 | Calloway Kenneth L | SVP, Human Resources | Tax withholding | 4K | $39.18 | $146K | 38K |
| 2025-12-31 | Calloway Kenneth L | SVP, Human Resources | Tax withholding | 5K | $39.18 | $214K | 41K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON13 Form 144 notices on file for CENX worth $330.1M at the prices reported; 0 in the last 90 days worth $0. Latest: Berntzen Jarl filed on 2026-06-09 to sell 93,387 shares ($5.9M) from 2026-06-09.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-06-09 | Berntzen JarlDirector | 93K | $5.9M | 0.094% | 2026-06-09 | Charles Schwab Corp |
| 2026-03-25 | Trpkovski Peter AOfficer | 17K | $845K | 0.017% | 2026-03-25 | Wells Fargo Clearing Services |
| 2026-03-12 | Calloway Kenneth LOfficer | 18K | $1.1M | 0.018% | 2026-03-12 | Charles Schwab Corp |
| 2026-03-04 | Glencore International AG10% Stockholder | 6.3M | $52 | 6.381% | 2026-03-04 | Citigroup Global Markets Inc |
| 2026-03-02 | Hoffman Robert FOfficer | 21K | $1.1M | 0.022% | 2026-03-02 | Charles Schwab & Co |
| 2026-02-27 | Aboud MattOfficer | 30K | $1.5M | 0.032% | 2026-02-27 | Charles Schwab Corp. |
| 2026-02-25 | Hafberg Agust FOfficer | 23K | $1.2M | 0.025% | 2026-02-25 | Charles Schwab & Co |
| 2026-02-25 | Gudlaugsson GunnarOfficer | 43K | $2.3M | 0.046% | 2026-02-25 | Charles Schwab Corp. |
| 2026-02-23 | DeZee JohnOfficer | 66K | $3.5M | 0.071% | 2026-02-23 | Chalres Schwab Corp |
| 2026-01-23 | Jesse E. GaryPresident, CEO, Director | 300K | $14.5M | 0.321% | 2026-01-23 | J.P. Morgan Securities LLC |
| 2025-11-12 | Glencore International AG10% Stockholder | 9.0M | $297.4M | 9.642% | 2025-11-10 | Morgan Stanley & Co. LLC |
| 2025-09-25 | Hafberg Agust FOfficer | 9K | $250K | 0.010% | 2025-09-25 | Charles Schwab & Co |
| 2025-09-15 | Calloway Kenneth LOfficer | 16K | $433K | 0.018% | 2025-09-15 | Charles Schwab & Co |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON5 holders report 5% or more of CENX in their latest filing, 3 on Schedule 13D (active intent). The largest reported stake is Glencore International AG at 30.0% of the class (29,690,702 shares), filed 2026-03-04 for an event on 2026-03-04.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-05 | 13G/Ano. 7 | BlackRock, Inc.parent holding company | 10.4M | 10.5% | 2026-09-30 |
| 2026-08-07 | 13G | STATE STREET CORPORATIONparent holding company | 5.5M | 5.6% | 2026-06-30 |
| 2026-03-26 | 13G/Ano. 6 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-03-04 | 13D/Ano. 30 | Glencore International AGcorporation, parent holding company | 29.7M | 30.0% | 2026-03-04 |
| 2026-03-04 | 13D/Ano. 30 | Glencore plccorporation, parent holding company | 29.7M | 30.0% | 2026-03-04 |
| 2026-03-04 | 13D/Ano. 30 | Glencore AGcorporation | 17.5M | 17.7% | 2026-03-04 |
13F holders
Tracked managers holding CENX at their latest 13F. JSON9 of the 30 tracked managers held CENX at their latest 13F, $221.5M in total at quarter-end prices. Fisher Asset Management is the largest at $70.6M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 6 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Fisher Asset Management | 2026-06-30 | 1.5M | $70.6M | 0.02% | +683K |
| Millennium Management | 2026-06-30 | 1.1M | $51.4M | 0.02% | -871K |
| D. E. Shaw & Co. | 2026-06-30 | 796K | $36.6M | 0.02% | -638K |
| Bridgewater Associates | 2026-06-30 | 474K | $21.8M | 0.09% | -259K |
| Point72 Asset Management | 2026-06-30 | 295K | $13.6M | 0.01% | -275K |
| Citadel Advisors | 2026-06-30 | 290K | $13.3M | 0.00% | -1.0M |
| AQR Capital Management | 2026-06-30 | 188K | $8.7M | 0.00% | +22K |
| Renaissance Technologies | 2026-06-30 | 94K | $4.3M | 0.01% | -45K |
| Two Sigma Investments | 2026-06-30 | 28K | $1.3M | 0.00% | new |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q2 FY 2026 (quarter ended 2026-06-30) Century Aluminum reported revenue of $752.1M, up 19.7% from the same quarter a year earlier, and net income of $249.3M (2.39 diluted EPS). In FY 2025 it generated $185.0M of operating cash flow.
- Cash
- $343.4M
- Equity
- $1.40B
- Total assets
- $2.88B
- Shares outstanding
- 98,993,295
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 FY 2026 | 2026-06-30 | $752.1M | $249.3M | 33.1% | 2.39 |
| Q1 FY 2026 | 2026-03-31 | $649.2M | $337.5M | 52.0% | 3.23 |
| Q4 FY 2025derived | 2025-12-31 | $633.7M | $1.8M | 0.3% | n/a |
| Q3 FY 2025 | 2025-09-30 | $632.2M | $14.9M | 2.4% | 0.15 |
| Q2 FY 2025 | 2025-06-30 | $628.1M | -$4.6M | -0.7% | -0.05 |
| Q1 FY 2025 | 2025-03-31 | $633.9M | $29.7M | 4.7% | 0.29 |
| Q4 FY 2024derived | 2024-12-31 | $630.9M | $45.2M | 7.2% | n/a |
| Q3 FY 2024 | 2024-09-30 | $539.1M | $47.3M | 8.8% | 0.46 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $2.53B | $41.8M | $185.0M | $100.2M | n/a | n/a |
| FY 2024 | 2024-12-31 | $2.22B | $336.8M | -$24.6M | $82.3M | n/a | n/a |
| FY 2023 | 2023-12-31 | $2.19B | -$43.1M | $105.6M | $95.0M | n/a | n/a |
| FY 2022 | 2022-12-31 | $2.78B | -$14.1M | $25.9M | $86.3M | n/a | n/a |
| FY 2021 | 2021-12-31 | $2.21B | -$167.1M | -$64.7M | $83.0M | n/a | n/a |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-08-04 from the cover page.
What this page is
Century Aluminum in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Century Aluminum (CENX), SEC CIK 949157, listed on Nasdaq, classified by the SEC as primary production of aluminum. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-12.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-02.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-06-09.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-10-05.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-06.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-06-15.JSON and CSV
- Company record
- EDGAR filing index for CIK 949157Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of CENX is sold short?
What is CENX's daily short volume?
Does CENX have fails to deliver?
Are CENX insiders buying or selling?
Have CENX insiders filed to sell?
Who owns 5% or more of CENX?
What did CENX report last quarter?
Which tracked 13F managers own CENX?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.