MasTec, Inc. (MTZ) Insider Trading
Over the last 6 months, 582 institutions increased and 568 reduced their position (13F).
Insider Activity
Sentiment
50/100
Buys (3m)
0
Sells (3m)
0
Net (3m)
$0
Insider trades by month Buys Sells
Sep
Oct
Nov
Mar
May
Jun
Context3-month price -36.6%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 18, 2026 | Csiszar Ernst Ndirector | Grant | 152 | — |
| Aug 18, 2026 | Dwyer Robert Jdirector | Tax | 31 | $297.59 |
| Aug 18, 2026 | Palomarez Javier Albertodirector | Tax | 31 | $297.59 |
| Aug 18, 2026 | JOHNSON JULIA Ldirector | Grant | 139 | — |
| Aug 18, 2026 | Spiro Alexdirector | Grant | 139 | — |
| Aug 18, 2026 | Parker Ava Ldirector | Tax | 20 | $297.59 |
| Aug 18, 2026 | Csiszar Ernst Ndirector | Tax | 34 | $297.59 |
| Aug 18, 2026 | Dwyer Robert Jdirector | Grant | 139 | — |
| Aug 18, 2026 | Campbell C Robertdirector | Grant | 139 | — |
| Aug 18, 2026 | Parker Ava Ldirector | Grant | 177 | — |
| Aug 18, 2026 | Palomarez Javier Albertodirector | Grant | 139 | — |
| Aug 18, 2026 | Miranda Manuel Benitodirector | Grant | 152 | — |
| Jun 5, 2026 | Csiszar Ernst Ndirector | Sell | 6,500 | $371.17 |
| May 19, 2026 | Palomarez Javier Albertodirector | Grant | 95 | — |
| May 19, 2026 | Parker Ava Ldirector | Tax | 14 | $434.77 |
| May 19, 2026 | Csiszar Ernst Ndirector | Tax | 23 | $434.77 |
| May 19, 2026 | Dwyer Robert Jdirector | Grant | 95 | — |
| May 19, 2026 | Parker Ava Ldirector | Grant | 121 | — |
| May 19, 2026 | Campbell C Robertdirector | Grant | 95 | — |
| May 19, 2026 | Dwyer Robert Jdirector | Tax | 21 | $434.77 |
| May 19, 2026 | JOHNSON JULIA Ldirector | Grant | 95 | — |
| May 19, 2026 | Csiszar Ernst Ndirector | Grant | 104 | — |
| May 19, 2026 | Palomarez Javier Albertodirector | Tax | 21 | $434.77 |
| May 6, 2026 | Campbell C Robertdirector | Sell | 3,000 | $417.00 |
| Apr 17, 2026 | Love Timothy Michaelofficer: CAO | Grant | 492 | — |
| Mar 27, 2026 | Palomarez Javier Albertodirector | Sell | 950 | $325.43 |
| Mar 20, 2026 | DiMarco Paulofficer: CFO | Grant | 9,074 | — |
| Mar 20, 2026 | Apple Robert Eofficer: COO | Grant | 11,548 | — |
| Mar 20, 2026 | MAS JORGEdirector | Grant | 15,838 | — |
| Mar 20, 2026 | de Cardenas Albertoofficer: EVP, General Counsel | Grant | 6,269 | — |
Source: MTZ SEC Form 4 filings, latest Aug 18, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their MTZ positions over the last 6 months (SEC Form 13F).
Increased
582
New positions
373
Reduced
568
Sold out
74
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 7.6M | Aug 7, 2026 |
| BLACKROCK, INC. | Increased | 7.3M | May 13, 2026 |
| PECONIC PARTNERS LLC | Increased | 3.7M | Aug 14, 2026 |
| PECONIC PARTNERS LLC | Increased | 3.6M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 2.8M | Aug 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 2.8M | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.8M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 2.8M | May 8, 2026 |
| STATE STREET CORP | Increased | 2.2M | Aug 7, 2026 |
| Hill City Capital, LP | Unchanged | 2.2M | Aug 17, 2026 |
| HILL CITY CAPITAL, LP | Unchanged | 2.2M | May 15, 2026 |
| STATE STREET CORP | Increased | 1.9M | May 15, 2026 |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | 1.6M | May 15, 2026 |
| LONE PINE CAPITAL LLC | New Position | 1.5M | May 15, 2026 |
| FIRST TRUST ADVISORS LP | Increased | 1.4M | May 13, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.