Comparable stake leader
Jorge Mas
SEC ownership of MASTEC INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000015615.
Disclosed value leader
Jorge Mas
Comparable rows
50/50
Latest evidence
14 Aug 2026
- Public ticker
- MTZ on NYSE
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Jorge Mas
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Jorge Mas
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
14 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000015615
- Issuer location
- Coral Gables, FL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of MASTEC INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Jorge Mas
Disclosed value leader
Jorge Mas
Comparable rows
50/50
Latest evidence
14 Aug 2026
13D/G
3/4/5
13F
Lead comparable stake: 15%
13D/G row: Jorge Mas
Showing 1-8 of 50 holder rows.
Quick read
Jorge Mas leads the comparable SEC ownership view at 15%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Jorge Mas's linked filing trail.
Comparable ownership
Top 5
Jorge Mas
15%
BlackRock, Inc.
8.1%
Jose Ramon Mas
7.7%
NORDEA INVESTMENT MANAGEMENT AB
2.5%
Robert E. Apple
0.24%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Jorge Mas |
13D/G
3/4/5
Director
|
15%
|
$4,567,438,544
11,872,111 shares
|
-$46,166 | 11 Aug 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
8.1%
from 13D/G
|
$3,178,068,993
7,638,487 shares
|
— | 30 Jun 2026 |
| Jose Ramon Mas |
13D/G
3/4/5
CEO, Director
|
7.7%
|
$2,379,527,825
6,185,090 shares
|
-$687,495 | 11 Aug 2026 |
| NORDEA INVESTMENT MANAGEMENT AB |
13D/G
13F
Company
|
2.5%
|
$253,025,284
1,985,758 shares
|
$0 | 30 Sep 2024 |
| Robert E. Apple |
3/4/5
COO
|
0.24%
|
$56,733,391
195,659 shares
|
-$2,004,363 | 18 Mar 2026 |
| Alberto de Cardenas |
3/4/5
EVP, General Counsel
|
0.14%
|
$32,146,043
110,864 shares
|
— | 18 Mar 2026 |
| Paul DiMarco |
3/4/5
CFO
|
0.1%
|
$22,222,514
76,640 shares
|
— | 18 Mar 2026 |
| Julia L. Johnson |
3/4/5
Director
|
0.09%
|
$30,569,592
73,474 shares
|
— | 14 Aug 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$9,319,340.
Buys
$0
Insiders: 0
Sells
$9,319,340
Insiders: 5
Net
-$9,319,340
Shares: -33,879
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 33,879
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 10,450 | $0 | $3,972,764 | -$3,972,764 |
| 6-9 | 0 | 6,500 | $0 | $1,952,600 | -$1,952,600 |
| 9-12 | 0 | 16,929 | $0 | $3,393,976 | -$3,393,976 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-15 of 15 reporting-owner rows connected to MASTEC INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
15
Largest Forms 3/4/5 holder
Jorge Mas
Net 12M change
-$9,319,340
Latest report
14 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Jorge Mas | Director | $2,964,020,412 | Mixed | 11 Aug 2026 | ||
| Jose Ramon Mas | CEO, Director | $1,023,692,471 | Mixed | 11 Aug 2026 | ||
| Robert E. Apple | Coo | $56,733,391 | -$2,004,363 | -3.4% | Mixed | 18 Mar 2026 |
| Alberto de Cardenas | EVP, General Counsel | $32,146,043 | Mixed | 18 Mar 2026 | ||
| Julia L. Johnson | Director | $30,569,592 | Median | 14 Aug 2026 | ||
| Paul DiMarco | Cfo | $22,222,514 | Mixed | 18 Mar 2026 | ||
| C. Robert Campbell | Director | $12,847,932 | -$2,242,950 | -15% | Median | 14 Aug 2026 |
| Robert J. Dwyer | Director | $8,720,617 | Median | 14 Aug 2026 | ||
| George Pita | Cfo | $8,477,253 | Mixed | 19 Mar 2023 | ||
| Timothy Michael Love | Cao | $4,634,882 | -$397,663 | -7.9% | Mixed | 17 Mar 2026 |
| Ernst N. Csiszar | Director | $4,549,200 | -$4,365,205 | -49% | Median | 14 Aug 2026 |
| Javier Alberto Palomarez | Director | $4,482,630 | -$309,159 | -6.5% | Median | 14 Aug 2026 |
| Ava L. Parker | Director | $2,308,716 | Median | 14 Aug 2026 | ||
| Manuel Benito Miranda | Director | $63,241 | Median | 14 Aug 2026 | ||
| Alex Spiro | Director | $57,832 | Median | 14 Aug 2026 |
Recent insider transactions for MASTEC INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Manuel Benito Miranda | MTZ | Common Stock | Award | 152 | 152 | 14 Aug 2026 | Direct | |||
| Javier Alberto Palomarez | MTZ | Common Stock | Tax liability | -0.29% | -31 | 10,774 | 14 Aug 2026 | Direct | ||
| Javier Alberto Palomarez | MTZ | Common Stock | Award | 1.3% | 139 | 10,805 | 14 Aug 2026 | Direct | ||
| Ernst N. Csiszar | MTZ | Common Stock | Tax liability | -0.31% | -34 | 10,934 | 14 Aug 2026 | Direct | ||
| Ernst N. Csiszar | MTZ | Common Stock | Award | 1.41% | 152 | 10,968 | 14 Aug 2026 | Direct | ||
| C. Robert Campbell | MTZ | Common Stock | Award | 0.45% | 139 | 30,880 | 14 Aug 2026 | Direct | ||
| Alex Spiro | MTZ | Common Stock | Award | 139 | 139 | 14 Aug 2026 | Direct | |||
| Robert J. Dwyer | MTZ | Common Stock | Tax liability | -0.15% | -31 | 20,960 | 14 Aug 2026 | Direct | ||
| Robert J. Dwyer | MTZ | Common Stock | Award | 0.67% | 139 | 20,991 | 14 Aug 2026 | Direct | ||
| Julia L. Johnson | MTZ | Common Stock | Award | 0.19% | 139 | 73,474 | 14 Aug 2026 | Direct | ||
| Ava L. Parker | MTZ | Common Stock | Tax liability | -0.36% | -20 | 5,549 | 14 Aug 2026 | Direct | ||
| Ava L. Parker | MTZ | Common Stock | Award | 3.28% | 177 | 5,569 | 14 Aug 2026 | Direct | ||
| Jose Ramon Mas | MTZ | Forward sale contract (potential obligation to sell) | Other | 340,794 | 340,794 | 11 Aug 2026 | Direct | |||
| Jose Ramon Mas | MTZ | Forward sale contract (potential obligation to sell) | Other | -100% | -340,794 | 0 | 11 Aug 2026 | Direct | ||
| Jorge Mas | MTZ | Forward sale contract (potential obligation to sell) | Other | 1,099,335 | 1,099,335 | 11 Aug 2026 | See Footnote | |||
| Jorge Mas | MTZ | Forward sale contract (potential obligation to sell) | Other | -100% | -1,099,335 | 0 | 11 Aug 2026 | See Footnote | ||
| Ernst N. Csiszar | MTZ | Common Stock | Sale | -37.5% | $2,412,605 | $371.17 | -6,500 | 10,816 | 03 Jun 2026 | Direct |
| Ernst N. Csiszar | MTZ | Common Stock | Tax liability | -0.13% | -23 | 17,316 | 15 May 2026 | Direct | ||
| Ernst N. Csiszar | MTZ | Common Stock | Award | 0.6% | 104 | 17,339 | 15 May 2026 | Direct | ||
| Robert J. Dwyer | MTZ | Common Stock | Tax liability | -0.1% | -21 | 20,852 | 15 May 2026 | Direct | ||
| Robert J. Dwyer | MTZ | Common Stock | Award | 0.46% | 95 | 20,873 | 15 May 2026 | Direct | ||
| Ava L. Parker | MTZ | Common Stock | Tax liability | -0.26% | -14 | 5,392 | 15 May 2026 | Direct | ||
| Ava L. Parker | MTZ | Common Stock | Award | 2.29% | 121 | 5,406 | 15 May 2026 | Direct | ||
| C. Robert Campbell | MTZ | Common Stock | Award | 0.31% | 95 | 30,741 | 15 May 2026 | Direct | ||
| Javier Alberto Palomarez | MTZ | Common Stock | Tax liability | -0.2% | -21 | 10,666 | 15 May 2026 | Direct | ||
| Javier Alberto Palomarez | MTZ | Common Stock | Award | 0.9% | 95 | 10,687 | 15 May 2026 | Direct | ||
| Julia L. Johnson | MTZ | Common Stock | Award | 0.13% | 95 | 73,335 | 15 May 2026 | Direct | ||
| C. Robert Campbell | MTZ | Common Stock | Sale | -8.92% | $1,251,000 | $417.00 | -3,000 | 30,646 | 04 May 2026 | Direct |
| Javier Alberto Palomarez | MTZ | Common Stock | Sale | -8.23% | $309,158 | $325.43 | -950 | 10,592 | 25 Mar 2026 | Direct |
| Paul DiMarco | MTZ | Common Stock | Award | 15.8% | 9,074 | 66,627 | 18 Mar 2026 | Direct | ||
| Robert E. Apple | MTZ | Common Stock | Award | 6.71% | 11,548 | 183,591 | 18 Mar 2026 | Direct | ||
| Alberto de Cardenas | MTZ | Common Stock | Award | 6.5% | 6,269 | 102,780 | 18 Mar 2026 | Direct | ||
| Jorge Mas | MTZ | Common Stock | Award | 0.35% | 15,838 | 4,556,686 | 18 Mar 2026 | Direct | ||
| Jose Ramon Mas | MTZ | Common Stock | Award | 0.82% | 26,397 | 3,254,461 | 18 Mar 2026 | Direct | ||
| Timothy Michael Love | MTZ | Common Stock | Award | 5.02% | 492 | 10,292 | 17 Mar 2026 | Direct | ||
| Jorge Mas | MTZ | Common Stock | Tax liability | -0.35% | -15,958 | 4,540,848 | 10 Mar 2026 | Direct | ||
| Jose Ramon Mas | MTZ | Common Stock | Tax liability | -0.87% | -28,184 | 3,228,064 | 10 Mar 2026 | Direct | ||
| Robert E. Apple | MTZ | Common Stock | Tax liability | -6.62% | -12,206 | 172,043 | 10 Mar 2026 | Direct | ||
| Alberto de Cardenas | MTZ | Common Stock | Tax liability | -4.77% | -4,838 | 96,511 | 10 Mar 2026 | Direct | ||
| Ernst N. Csiszar | MTZ | Common Stock | Sale | -27.4% | $1,952,600 | $300.40 | -6,500 | 17,235 | 03 Mar 2026 | Direct |
| Javier Alberto Palomarez | MTZ | Common Stock | Tax liability | -0.29% | -34 | 11,542 | 13 Feb 2026 | Direct | ||
| Javier Alberto Palomarez | MTZ | Common Stock | Award | 1.35% | 154 | 11,576 | 13 Feb 2026 | Direct | ||
| Julia L. Johnson | MTZ | Common Stock | Award | 0.21% | 154 | 73,240 | 13 Feb 2026 | Direct | ||
| Robert J. Dwyer | MTZ | Common Stock | Tax liability | -0.16% | -34 | 20,778 | 13 Feb 2026 | Direct | ||
| Robert J. Dwyer | MTZ | Common Stock | Award | 0.75% | 154 | 20,812 | 13 Feb 2026 | Direct | ||
| Ernst N. Csiszar | MTZ | Common Stock | Tax liability | -0.16% | -37 | 23,735 | 13 Feb 2026 | Direct | ||
| Ernst N. Csiszar | MTZ | Common Stock | Award | 0.71% | 168 | 23,772 | 13 Feb 2026 | Direct | ||
| C. Robert Campbell | MTZ | Common Stock | Award | 0.46% | 154 | 33,646 | 13 Feb 2026 | Direct | ||
| Ava L. Parker | MTZ | Common Stock | Tax liability | -0.41% | -22 | 5,285 | 13 Feb 2026 | Direct | ||
| Ava L. Parker | MTZ | Common Stock | Award | 3.81% | 195 | 5,307 | 13 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.