Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

CENTURY ALUMINUM CO

CENX · Nasdaq · CIK 0000949157 · Basic Materials · Aluminum

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

6 Form 4 transaction lines observed in the same window
0 sales · 6 option, withholding, award, gift or other lines

Last qualifying purchase2023-05-11 · Aboud Matt · $130.5K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesNone
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Michelmore Andrew GDirector
○○
Berntzen JarlDirector
○
GLASSER ERROLDirector
○
Bush Jennifer MaryDirector
○
Olivier Tamla ADirector
○
● Purchase▼ Sale○ Other

—

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2023-05-11 · Aboud Matt.

Recent Form 4 activity

0Purchases
13Sales
41Other Form 4 lines
26SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER6 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
9,181,883
Previous report
9,701,397
Avg daily volume
1,813,279
Days to cover
5.1

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2023-05-11Aboud MattPurchase (P)Common Stock18,000USD 7.25USD 130,500SEC filing ↗
2020-03-10Michelmore Andrew GPurchase (P)Common Stock3,000USD 4.41USD 13,230SEC filing ↗

Form 4 evidence

54 transaction lines in the latest 365-day window; 324 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-15Olivier Tamla AAward / grant (A)Common Stock2,172USD 0.00USD 0SEC filing ↗
2026-06-15Michelmore Andrew GTax withholding (F)Common Stock652USD 54.55USD 35,567SEC filing ↗
2026-06-15Michelmore Andrew GAward / grant (A)Common Stock2,172USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-15Olivier Tamla AAward / grant (A)Common Stock2,172USD 0.00USD 0SEC filing ↗
2026-06-15Michelmore Andrew GTax withholding (F)Common Stock652USD 54.55USD 35,567SEC filing ↗
2026-06-15Michelmore Andrew GAward / grant (A)Common Stock2,172USD 0.00USD 0SEC filing ↗
2026-06-15GLASSER ERROLAward / grant (A)Common Stock2,172USD 0.00USD 0SEC filing ↗
2026-06-15Bush Jennifer MaryAward / grant (A)Common Stock2,172USD 0.00USD 0SEC filing ↗
2026-06-15Berntzen JarlAward / grant (A)Common Stock2,172USD 0.00USD 0SEC filing ↗
2026-03-25Trpkovski Peter ASale (S)Common Stock16,739USD 50.51USD 845,487SEC filing ↗
2026-03-16Gary Jesse ESale (S)Common Stock150,000USD 55.47USD 8,320,500SEC filing ↗
2026-03-12Calloway Kenneth LSale (S)Common Stock18,000USD 58.00USD 1,044,000SEC filing ↗
2026-03-11Hoffman Robert FSale (S)Common Stock10,529USD 56.51USD 594,994SEC filing ↗
2026-03-04Hoffman Robert FSale (S)Common Stock10,000USD 56.33USD 563,300SEC filing ↗
2026-03-04GLENCORE INTERNATIONAL AG; Glencore AG; Glencore plcSale (S)Common Stock6,315,245USD 51.75USD 326,813,929SEC filing ↗
2026-03-03Aboud MattSale (S)Common Stock2,971USD 52.67USD 156,483SEC filing ↗
2026-03-02Aboud MattSale (S)Common Stock12,126USD 52.50USD 636,615SEC filing ↗
2026-02-27Hafberg Agust FSale (S)Common Stock22,884USD 51.24USD 1,172,576SEC filing ↗
2026-02-25Gudlaugsson GunnarSale (S)Common Stock43,000USD 54.10USD 2,326,300SEC filing ↗
2026-02-23DeZee JohnSale (S)Common Stock66,000USD 50.72USD 3,347,520SEC filing ↗
2026-02-09Trpkovski Peter ATax withholding (F)Common Stock4,240USD 54.36USD 230,486SEC filing ↗
2026-01-23Gary Jesse ESale (S)Common Stock150,000USD 48.19USD 7,228,500SEC filing ↗
2026-01-12Gary Jesse EGift (G)Common Stock314,611USD 0.00USD 0SEC filing ↗
2026-01-01Trpkovski Peter AAward / grant (A)Common Stock13,488USD 0.00USD 0SEC filing ↗
2026-01-01Hoffman Robert FAward / grant (A)Common Stock5,122USD 0.00USD 0SEC filing ↗
2026-01-01Hafberg Agust FAward / grant (A)Common Stock5,238USD 0.00USD 0SEC filing ↗
2026-01-01Gudlaugsson GunnarAward / grant (A)Common Stock15,624USD 0.00USD 0SEC filing ↗
2026-01-01Gary Jesse EAward / grant (A)Common Stock57,443USD 0.00USD 0SEC filing ↗
2026-01-01DeZee JohnAward / grant (A)Common Stock9,821USD 0.00USD 0SEC filing ↗
2026-01-01Calloway Kenneth LAward / grant (A)Common Stock5,238USD 0.00USD 0SEC filing ↗
2026-01-01Aboud MattAward / grant (A)Common Stock5,529USD 0.00USD 0SEC filing ↗
2025-12-31Trpkovski Peter ATax withholding (F)Common Stock12,135USD 39.18USD 475,449SEC filing ↗
2025-12-31Trpkovski Peter AAward / grant (A)Common Stock18,260USD 0.00USD 0SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerCENX
CIK0000949157
SectorBasic Materials
IndustryAluminum Yahoo Finance
SEC SIC3334 Primary Production of Aluminum
ExchangeNasdaq

Data coverage

Local Form 4 history324 transaction lines from 2020-01-01 to 2026-06-15
2 P purchase lines · 68 S sale lines · 254 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.