CapitolRadar tracks every publicly disclosed MTZ trade by US congress members and corporate insiders: 5 disclosed trades (3 buys, 2 sells) by 2 tracked traders, from 2025-01-02 to 2026-08-21. Updated daily from official filings.
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MasTec, Inc. (MTZ) — Industrials · Engineering & Construction, market cap about $15.0B.
CapitolRadar analysis
5 MTZ trades split between 3 buys and 2 sells
Five tracked trades in MasTec, Inc. (MTZ) span January 2, 2025 through August 21, 2026. The activity consists of three buys and two sells by two distinct traders. That produces a modest buy majority by transaction count, but the sample is too small to establish a broad or persistent trading pattern. The disclosed record covers an Industrials company in the Engineering & Construction industry.
The activity was intermittent rather than concentrated in every quarter. Two buys occurred in 2025 Q1. One sell was recorded in 2025 Q4, followed by another sell in 2026 Q1. The latest listed quarter, 2026 Q3, contains one trade, which was a buy. No transaction values were provided here, so the relative financial size of the buys and sells cannot be compared.
2 buyers account for all reported purchases
Markwayne Mullin made two MTZ buys, with the latest dated February 3, 2025. Thomas H. Kean made one buy, dated August 21, 2026. Together, those two traders account for all three tracked purchases. The available facts do not identify which trader or traders made the two sales, so buyer-level conclusions should remain limited to the disclosed purchase counts.
The MTZ buyers’ other reported purchases overlap with several unrelated tickers: one of them also bought LIN, one bought TOST, one bought AMZN, and one bought EQT. The data does not specify whether the same buyer made all four of those purchases, and these cross-holdings alone do not establish a shared strategy or motive.
Disclosure timing limits real-time interpretation
Congressional trading disclosures may carry a 45-day disclosure lag, so a filing can become visible well after the underlying transaction date. Any disclosed amount ranges are estimates rather than exact transaction values. With only five trades and two distinct traders, both directional comparisons and trader-level patterns rest on a small sample.
Analysis written from the tracked record on 2026-09-15; it is refreshed whenever the underlying numbers change.
Activity by quarter
| Quarter | Disclosed trades | Buys | Sells |
|---|---|---|---|
| 2026 Q3 | 1 | 1 | 0 |
| 2026 Q1 | 1 | 0 | 1 |
| 2025 Q4 | 1 | 0 | 1 |
| 2025 Q1 | 2 | 2 | 0 |
Who is buying MTZ?
| Trader | Disclosed buys | Last buy | Grade |
|---|---|---|---|
| Markwayne Mullin | 2 | 2025-02-03 | — |
| Thomas H. Kean | 1 | 2026-08-21 | — |
Disclosed trades in MTZ
| Date | Who | Type | Amount | 30d vs SPY |
|---|---|---|---|---|
| 2026-08-21 | Thomas H. Kean | buy | $1,001 - $15,000 | — |
| 2026-02-04 | Markwayne Mullin | sell | $15,001 - $50,000 | — |
| 2025-12-18 | Markwayne Mullin | sell | $15,001 - $50,000 | — |
| 2025-02-03 | Markwayne Mullin | buy | $1,001 - $15,000 | — |
| 2025-01-02 | Markwayne Mullin | buy | $15,001 - $50,000 | — |
CapitolRadar signal history
NEW PICK 2026-09-14
Rep. Thomas H. Kean disclosed buying $1,001 to $15,000 of MasTec stock. The panel passed because Kean has no verified trading history against the S&P 500, making this isolated purchase an unproven signal. A documented record of his prior purchases outperforming the market would have provided the strongest evidence to change the verdict.
These buyers also bought
Other stocks the tracked buyers of MTZ disclosed buying in the last six months: LIN (1) · TOST (1) · AMZN (1) · EQT (1).
About MasTec, Inc.
MasTec, Inc. is a leading infrastructure construction firm that delivers a comprehensive suite of services, encompassing engineering, construction, installation, maintenance, and enhancement. The company primarily serves the communications, energy, utility, and broader infrastructure sectors throughout the United States and Canada. Its operations are structured across distinct segments: Communications, Clean Energy and Infrastructure, Oil and Gas, Power Delivery, and Other. MasTec's construction activities involve building intricate underground and overhead distribution systems, essential for …
Frequently asked questions
Which politicians bought MTZ most?
Markwayne Mullin leads with 2 disclosed buys, followed by Thomas H. Kean.
How current is this page?
It re-renders from the tracked record on every view and new filings are ingested daily — but STOCK Act disclosures can lag the trade by up to 45 days, so the most recent weeks are always incomplete.
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CapitolRadar tracks publicly disclosed trades (STOCK Act filings and SEC Form 4). Disclosures can lag the trade by up to 45 days. Backtests measure past disclosed buys against the S&P 500 and do not predict future results. Everything on this page is impersonal information for your own research — not investment advice.