SEC Form 4
MasTec, Inc. (MTZ) insider trading
In the 12 months to Oct 23, 2026, 4 MTZ insiders reported open-market sales of $6.3M across 5 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $6.3M
- 5 filings · 4 insiders
- Open-market purchases
- $0
- 0 filings
Who traded MTZ, and when
- Sale
MTZ daily close from Oct 23, 2025 to Oct 23, 2026, between $171.05 and $437.51, last $171.05. 5 sale and 0 purchase filings by 4 insiders, marked at their filing dates. Ernst N. Csiszar, Director: sold $4.4M across 2 filings, first filed Mar 5, 2026, last Jun 5, 2026. C. Robert Campbell, Director: sold $1.3M across 1 filing, first filed May 6, 2026, last May 6, 2026. Timothy Michael Love, CAO: sold $397.7K across 1 filing, first filed Nov 5, 2025, last Nov 5, 2025. Javier Alberto Palomarez, Director: sold $309.2K across 1 filing, first filed Mar 27, 2026, last Mar 27, 2026.
Largest mark · tap a row for others
Ernst N. Csiszar · Director
Sale $2,412,605
6,500 shares at $371.17 avg
Filed Jun 5, 2026 · traded Jun 3
Close on filing date $363.89
Ernst N. Csiszar · Director
Director
$4.4M soldC. Robert Campbell · Director
Director
$1.3M soldTimothy Michael Love · CAO
CAO
$397.7K soldJavier Alberto Palomarez · Director
Director
$309.2K soldHas MasTec, Inc.'s CEO sold stock?
No. Jose Ramon Mas (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
5 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Ernst N. Csiszar | Director | $4.4M | — | 2 | — | |
| C. Robert Campbell | Director | $1.3M | — | 1 | — | |
| Timothy Michael Love | CAO | $397.7K | — | 1 | — | |
| Javier Alberto Palomarez | Director | $309.2K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Ernst N. Csiszar Director | Sale | 6,500 | $371.17 | $2.4M | 10,816 | |
traded | C. Robert Campbell Director | Sale | 3,000 | $417.00 | $1.3M | 30,646 | |
traded | Javier Alberto Palomarez Director | Sale | 950 | $325.43 | $309.2K | 10,592 | |
traded | Ernst N. Csiszar Director | Sale | 6,500 | $300.40 | $2.0M | 17,235 | |
traded | Timothy Michael Love CAO | Sale | 1,929 | $206.15 | $397.7K | 9,757 |
GET /stocks/filings/vX/form-4?tickers=MTZ&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"MTZ"
],
"issuer_cik": "0000015615",
"owner_cik": "0001341639",
"accession_number": "0000015615-26-000067",
"form_type": "4",
"filing_date": "2026-06-05",
"period_of_report": "2026-06-03",
"issuer_name": "MASTEC INC",
"issuer_trading_symbol": "MTZ",
"owner_name": "Csiszar Ernst N",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-06-03",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 6500,
"transaction_price_per_share": 371.17,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 10816,
"transaction_value": 2412605,
"not_subject_to_section_16": false,
"direct_or_indirect": "D"
},
{
"tickers": [
"MTZ"
],
"issuer_cik": "0000015615",
"owner_cik": "0001307261",
"accession_number": "0000015615-26-000055",
"form_type": "4",
"filing_date": "2026-05-06",
"period_of_report": "2026-05-04",
"issuer_name": "MASTEC INC",
"issuer_trading_symbol": "MTZ",
"owner_name": "Campbell C Robert",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-05-04",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 3000,
"transaction_price_per_share": 417,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 30646,
"transaction_value": 1251000,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "These shares were sold in 14 separate transactions, each with a price of $417.00. The reporting person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold in each transaction."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 52 records
- Tax withholding20 records
- Grants and awards32 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for MTZ every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.