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

Core Scientific, Inc./tx

CORZ · Nasdaq; OTC · CIK 0001839341 · Technology · Software—Infrastructure

INSIDER SIGNAL

No active buy signal

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

55 Form 4 transaction lines observed in the same window
41 sales · 11 option, withholding, award, gift or other lines

Last qualifying purchase2026-09-15 · Weiss Eric Stanton · $98.0K

WHY NO ACTIVE SIGNAL?

Purchase activityPresent
Recent buying3 qualifying line group(s)
Recent salesHigh
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
DUCHENE TODD MSee remarks
▼▼▼▼▼▼○▼▼○▼▼▼▼○▼▼▼▼▼▼▼○▼▼
Sullivan Adam TaylorChief Executive Officer
○○○
Weiss Eric StantonDirector
●●
CRAIN ELIZABETHDirector
●
Adams MarkDirector
○
Smith Stephen MDirector
○
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS2
PURCHASE CONCENTRATION68%Largest buyer: Weiss Eric Stanton · $232.3K
CLUSTER BUYING · 15D2 insidersPeak activity: 2026-08-18–2026-08-20

Roles in the peak window: Director. Concentration uses priced qualifying P lines only and does not change the saved score.

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: 2026-09-15 · Weiss Eric Stanton.

Recent Form 4 activity

5Purchases
46Sales
27Other Form 4 lines
57SEC filings · 365 days
BUYING3 qualifying P line(s) · 180 days
SELLING41 sale line(s) · context only
OTHER11 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
65,988,563
Previous report
63,129,979
Avg daily volume
11,385,381
Days to cover
5.8

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
2026-09-15Weiss Eric StantonPurchase (P)Common Stock6,000USD 16.33USD 97,980SEC filing ↗
2026-08-20CRAIN ELIZABETHPurchase (P)Common Stock6,000USD 18.33USD 109,980SEC filing ↗
2026-08-18Weiss Eric StantonPurchase (P)Common Stock7,000USD 19.19USD 134,330SEC filing ↗
2026-03-09Weiss Eric StantonPurchase (P)Common Stock7,000USD 14.53USD 101,710SEC filing ↗
2025-11-04Weiss Eric StantonPurchase (P)Common Stock5,000USD 21.50USD 107,500SEC filing ↗
2025-05-28Rozov YadinPurchase (P)Common Stock110,000USD 10.87USD 1,195,700SEC filing ↗
2025-03-06Weiss Eric StantonPurchase (P)Common Stock6,000USD 8.46USD 50,760SEC filing ↗
2025-03-06Levy JordanPurchase (P)Common Stock62,500USD 8.01USD 500,625SEC filing ↗
2024-09-13Patten Jarrod MPurchase (P)Common Stock2,240USD 11.05USD 24,752SEC filing ↗
2024-09-11Patten Jarrod MPurchase (P)Common Stock2,100USD 10.10USD 21,210SEC filing ↗
2024-09-10Patten Jarrod MPurchase (P)Common Stock2,100USD 9.90USD 20,790SEC filing ↗
2024-09-09Weiss Eric StantonPurchase (P)Common Stock5,000USD 9.21USD 46,050SEC filing ↗
2024-09-04Patten Jarrod MPurchase (P)Common Stock7,800USD 9.28USD 72,384SEC filing ↗
2024-09-03Patten Jarrod MPurchase (P)Common Stock5,021USD 9.68USD 48,603SEC filing ↗
2024-08-30Patten Jarrod MPurchase (P)Common Stock1,500USD 9.95USD 14,925SEC filing ↗

Form 4 evidence

78 transaction lines in the latest 365-day window; 266 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-12DUCHENE TODD MSale (S)Common Stock10,000USD 15.12USD 151,160SEC filing ↗
2026-10-05DUCHENE TODD MSale (S)Common Stock10,000USD 16.31USD 163,056SEC filing ↗
2026-10-01Sullivan Adam TaylorTax withholding (F)Common Stock23,508USD 15.98USD 375,658SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-12DUCHENE TODD MSale (S)Common Stock10,000USD 15.12USD 151,160SEC filing ↗
2026-10-05DUCHENE TODD MSale (S)Common Stock10,000USD 16.31USD 163,056SEC filing ↗
2026-10-01Sullivan Adam TaylorTax withholding (F)Common Stock23,508USD 15.98USD 375,658SEC filing ↗
2026-10-01DUCHENE TODD MTax withholding (F)Common Stock8,228USD 15.98USD 131,483SEC filing ↗
2026-09-28DUCHENE TODD MSale (S)Common Stock10,000USD 16.76USD 167,600SEC filing ↗
2026-09-21DUCHENE TODD MSale (S)Common Stock10,000USD 18.37USD 183,700SEC filing ↗
2026-09-15Weiss Eric StantonPurchase (P)Common Stock6,000USD 16.33USD 97,980SEC filing ↗
2026-09-14DUCHENE TODD MSale (S)Common Stock10,000USD 17.14USD 171,400SEC filing ↗
2026-09-08DUCHENE TODD MSale (S)Common Stock10,000USD 18.67USD 186,700SEC filing ↗
2026-08-31DUCHENE TODD MSale (S)Common Stock10,000USD 16.23USD 162,300SEC filing ↗
2026-08-24DUCHENE TODD MSale (S)Common Stock10,000USD 17.45USD 174,500SEC filing ↗
2026-08-20CRAIN ELIZABETHPurchase (P)Common Stock6,000USD 18.33USD 109,980SEC filing ↗
2026-08-18Weiss Eric StantonPurchase (P)Common Stock7,000USD 19.19USD 134,330SEC filing ↗
2026-08-17DUCHENE TODD MSale (S)Common Stock10,000USD 20.10USD 201,000SEC filing ↗
2026-08-17DUCHENE TODD MTax withholding (F)Common Stock11,205USD 20.13USD 225,557SEC filing ↗
2026-08-10DUCHENE TODD MSale (S)Common Stock10,000USD 19.98USD 199,750SEC filing ↗
2026-08-03DUCHENE TODD MSale (S)Common Stock10,000USD 22.24USD 222,365SEC filing ↗
2026-07-30Adams MarkAward / grant (A)Common Stock27,594USD 0.00USD 0SEC filing ↗
2026-07-27DUCHENE TODD MSale (S)Common Stock10,000USD 20.95USD 209,498SEC filing ↗
2026-07-20DUCHENE TODD MSale (S)Common Stock10,000USD 22.30USD 223,000SEC filing ↗
2026-07-16Sullivan Adam TaylorTax withholding (F)Common Stock15,584USD 22.72USD 354,068SEC filing ↗
2026-07-16DUCHENE TODD MTax withholding (F)Common Stock4,325USD 22.72USD 98,264SEC filing ↗
2026-07-13DUCHENE TODD MSale (S)Common Stock10,000USD 22.45USD 224,474SEC filing ↗
2026-07-06DUCHENE TODD MSale (S)Common Stock10,000USD 22.63USD 226,300SEC filing ↗
2026-06-30Sullivan Adam TaylorTax withholding (F)Common Stock18,023USD 25.59USD 461,209SEC filing ↗
2026-06-30DUCHENE TODD MTax withholding (F)Common Stock5,469USD 25.59USD 139,952SEC filing ↗
2026-06-29DUCHENE TODD MSale (S)Common Stock10,000USD 26.17USD 261,669SEC filing ↗
2026-06-22DUCHENE TODD MSale (S)Common Stock10,000USD 29.29USD 292,948SEC filing ↗
2026-06-15DUCHENE TODD MSale (S)Common Stock10,000USD 28.20USD 281,960SEC filing ↗
2026-06-08DUCHENE TODD MSale (S)Common Stock10,000USD 26.85USD 268,515SEC 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 · —
TickerCORZ
CIK0001839341
SectorTechnology
IndustrySoftware—Infrastructure Yahoo Finance
SEC SIC6199 Finance Services
ExchangeNasdaq; OTC

Data coverage

Local Form 4 history266 transaction lines from 2022-05-27 to 2026-10-12
22 P purchase lines · 72 S sale lines · 172 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.