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

MASTEC INC

MTZ · NYSE · CIK 0000015615 · Industrials · Engineering & Construction

INSIDER SIGNAL

No active buy signal

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

24 Form 4 transaction lines observed in the same window
2 sales · 22 option, withholding, award, gift or other lines

Last qualifying purchaseNo qualifying purchase is present in the local Form 4 history.

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesLow
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
Csiszar Ernst NDirector
○○▼○○
Palomarez Javier AlbertoDirector
○○○○
Parker Ava LDirector
○○○○
Dwyer Robert JDirector
○○○○
Campbell C RobertDirector
▼○○
JOHNSON JULIA LDirector
○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 2 additional owner(s) remain in Form 4 evidence.

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.—

Recent Form 4 activity

0Purchases
5Sales
51Other Form 4 lines
40SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING2 sale line(s) · context only
OTHER22 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
4,593,756
Previous report
5,417,357
Avg daily volume
1,763,262
Days to cover
2.6

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

No qualifying code P equity purchase is present in the local Form 4 history.

Form 4 evidence

56 transaction lines in the latest 365-day window; 396 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-14Spiro AlexAward / grant (A)Common Stock139USD 0.00USD 0SEC filing ↗
2026-08-14Parker Ava LTax withholding (F)Common Stock20USD 297.59USD 5,952SEC filing ↗
2026-08-14Parker Ava LAward / grant (A)Common Stock177USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-14Spiro AlexAward / grant (A)Common Stock139USD 0.00USD 0SEC filing ↗
2026-08-14Parker Ava LTax withholding (F)Common Stock20USD 297.59USD 5,952SEC filing ↗
2026-08-14Parker Ava LAward / grant (A)Common Stock177USD 0.00USD 0SEC filing ↗
2026-08-14Palomarez Javier AlbertoTax withholding (F)Common Stock31USD 297.59USD 9,225SEC filing ↗
2026-08-14Palomarez Javier AlbertoAward / grant (A)Common Stock139USD 0.00USD 0SEC filing ↗
2026-08-14Miranda Manuel BenitoAward / grant (A)Common Stock152USD 0.00USD 0SEC filing ↗
2026-08-14JOHNSON JULIA LAward / grant (A)Common Stock139USD 0.00USD 0SEC filing ↗
2026-08-14Dwyer Robert JTax withholding (F)Common Stock31USD 297.59USD 9,225SEC filing ↗
2026-08-14Dwyer Robert JAward / grant (A)Common Stock139USD 0.00USD 0SEC filing ↗
2026-08-14Csiszar Ernst NTax withholding (F)Common Stock34USD 297.59USD 10,118SEC filing ↗
2026-08-14Csiszar Ernst NAward / grant (A)Common Stock152USD 0.00USD 0SEC filing ↗
2026-08-14Campbell C RobertAward / grant (A)Common Stock139USD 0.00USD 0SEC filing ↗
2026-06-03Csiszar Ernst NSale (S)Common Stock6,500USD 371.17USD 2,412,605SEC filing ↗
2026-05-15Parker Ava LTax withholding (F)Common Stock14USD 434.77USD 6,087SEC filing ↗
2026-05-15Parker Ava LAward / grant (A)Common Stock121USD 0.00USD 0SEC filing ↗
2026-05-15Palomarez Javier AlbertoTax withholding (F)Common Stock21USD 434.77USD 9,130SEC filing ↗
2026-05-15Palomarez Javier AlbertoAward / grant (A)Common Stock95USD 0.00USD 0SEC filing ↗
2026-05-15JOHNSON JULIA LAward / grant (A)Common Stock95USD 0.00USD 0SEC filing ↗
2026-05-15Dwyer Robert JTax withholding (F)Common Stock21USD 434.77USD 9,130SEC filing ↗
2026-05-15Dwyer Robert JAward / grant (A)Common Stock95USD 0.00USD 0SEC filing ↗
2026-05-15Csiszar Ernst NTax withholding (F)Common Stock23USD 434.77USD 10,000SEC filing ↗
2026-05-15Csiszar Ernst NAward / grant (A)Common Stock104USD 0.00USD 0SEC filing ↗
2026-05-15Campbell C RobertAward / grant (A)Common Stock95USD 0.00USD 0SEC filing ↗
2026-05-04Campbell C RobertSale (S)Common Stock3,000USD 417.00USD 1,251,000SEC filing ↗
2026-03-25Palomarez Javier AlbertoSale (S)Common Stock950USD 325.43USD 309,158SEC filing ↗
2026-03-18de Cardenas AlbertoAward / grant (A)Common Stock6,269USD 0.00USD 0SEC filing ↗
2026-03-18MAS JOSE RAMONAward / grant (A)Common Stock26,397USD 0.00USD 0SEC filing ↗
2026-03-18MAS JORGEAward / grant (A)Common Stock15,838USD 0.00USD 0SEC filing ↗
2026-03-18DiMarco PaulAward / grant (A)Common Stock9,074USD 0.00USD 0SEC filing ↗
2026-03-18Apple Robert EAward / grant (A)Common Stock11,548USD 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 · —
TickerMTZ
CIK0000015615
SectorIndustrials
IndustryEngineering & Construction Yahoo Finance
SEC SIC1623 Water, Sewer, Pipeline, Comm & Power Line Construction
ExchangeNYSE

Data coverage

Local Form 4 history396 transaction lines from 2020-01-09 to 2026-08-14
0 P purchase lines · 64 S sale lines · 332 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.