Mastec Inc
MTZ- Exchange
- NYSE
- Industry
- Water, Sewer, Pipeline, Comm & Power Line Construction
- SEC CIK
- 0000015615
In the last 90 days, Mastec Inc insiders filed 0 open-market purchases and 1 sale; 916 institutions reported holding it in 13F filings for Q2 2026, worth $24.7B in total; 4 superinvestors hold it, including Lone Pine Capital and Coatue Management.
Holders of 5% or more of MTZ
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Mastec Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Mas Jorge | 13D/A | 14.80%11.9M shares | −0.20 ppfrom 15.00% | Jan 13, 20234 filings | Aug 13, 2026 | SEC |
| BlackRock, Inc. | 13G/A | 8.10%6.40M shares | +1.30 ppfrom 6.80% | Feb 5, 20253 filings | Jul 29, 2026 | SEC |
| Mas Jose Ramon | 13D/A | 7.70%6.19M shares | −0.10 ppfrom 7.80% | Jan 13, 20234 filings | Aug 13, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
25 Schedule 13D and 13G filings on Mastec Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 13, 20264:15 PM ET | Mas Jorgeand 7 others | 13D/A | 14.80%11.9M shares | −0.20 ppfrom 15.00% | Aug 11, 2026 | SEC |
| Aug 13, 20264:15 PM ET | Mas Jose Ramonand 6 others | 13D/A | 7.70%6.19M shares | −0.10 ppfrom 7.80% | Aug 11, 2026 | SEC |
| Jul 29, 20263:19 PM ET | BlackRock, Inc. | 13G/A | 8.10%6.40M shares | +1.30 ppfrom 6.80% | Jun 30, 2026 | SEC |
| Mar 27, 202610:34 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Aug 22, 20254:25 PM ET | Mas Jorgeand 7 others | 13D/A | 15.00%11.9M shares | – | Aug 21, 2025 | SEC |
| Aug 22, 20254:20 PM ET | Mas Jose Ramonand 6 others | 13D/A | 7.80%6.19M shares | – | Aug 21, 2025 | SEC |
| Apr 17, 20259:35 AM ET | BlackRock, Inc. | 13G/A | 6.80%5.42M shares | −2.40 ppfrom 9.20% | Mar 31, 2025 | SEC |
| Feb 5, 20251:23 PM ET | BlackRock, Inc. | 13G/A | 9.20%7.29M shares | – | Dec 31, 2024 | SEC |
| Nov 5, 202412:41 PM ET | Nordea Investment Management AB | 13G | 2.50%1.99M shares | −2.50 ppfrom 5.00%Below 5% | Sep 30, 2024 | SEC |
| Sep 10, 2024 | Mas Jorge | 13D/AOld format | – | – | – | SEC |
| Sep 10, 2024 | Mas Jose Ramon | 13D/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 6, 20245:50 PM ET | Nordea Investment Management AB | 13G | 5.00%3.96M shares | New | Dec 31, 2023 | SEC |
| Jan 26, 20245:26 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 31, 20231:58 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 13, 2023 | Mas Jorge | 13D/AOld format | – | – | – | SEC |
| Jan 13, 2023 | Mas Jose Ramon | 13D/AOld format | – | – | – | SEC |
| Feb 11, 2022 | Macquarie Group Ltd | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2022 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 31, 20225:49 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Apr 9, 20216:02 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2021 | Macquarie Group Ltd | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 29, 20215:21 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
24 notices from officers, directors and other affiliates planning to sell Mastec Inc shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Nov 2, 20264:12 PM ET | Love Timothy MichaelOfficer | 366 | $72.7K | Nov 2, 202610b5-1 | Charles Schwab & Co., Inc. | SEC |
| Jun 3, 20264:21 PM ET | Ernest N CsiszarDirector | 6.50K | $2.41M | Jun 3, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 4, 202611:17 AM ET | Campbell C RobertDirector | 3.00K | $1.25M | May 4, 2026 | Raymond James & Associates | SEC |
| Mar 25, 202610:41 AM ET | Palomarez Javier AlbertoDirector | 950 | $306.9K | Mar 25, 2026 | Edward Jones | SEC |
| Mar 3, 20264:06 PM ET | Ernest N CsiszarDirector | 6.50K | $1.95M | Mar 3, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Nov 3, 20254:05 PM ET | Love Timothy MichaelOfficer | 1.93K | $397.7K | Nov 3, 2025 | Charles Schwab & Co., Inc. | SEC |
| Sep 30, 20255:11 PM ET | Campbell C RobertDirector | 2.00K | $420.6K | Sep 29, 2025 | Raymond James & Associates | SEC |
| Sep 18, 20254:27 PM ET | Robert E AppleOfficer | 10.0K | $2.00M | Sep 18, 202510b5-1 | Merrill Lynch | SEC |
| Sep 11, 20252:52 PM ET | Campbell C RobertDirector | 3.00K | $571.2K | Sep 11, 2025 | Raymond James & Associates | SEC |
| Aug 5, 20251:49 PM ET | de Cardenas AlbertoOfficer | 20.0K | $3.60M | Aug 4, 2025 | MERRILL LYNCH | SEC |
| Jul 16, 20253:58 PM ET | Apple Robert EOfficer | 10.0K | $1.75M | Jul 16, 202510b5-1 | Merrill Lynch | SEC |
| May 23, 20255:50 PM ET | Campbell C RobertOfficer | 5.00K | $461.4K | May 13, 2025 | Raymond James & Associates | SEC |
| Mar 24, 20254:39 PM ET | Ernest N CsiszarDirector | 2.52K | $331.3K | Mar 24, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Nov 29, 202411:17 AM ET | Palomarez Javier AlbertoBoard of Directors | 700 | $101.2K | Nov 29, 2024 | Edward Jones | SEC |
| Nov 26, 20243:19 PM ET | Apple Robert EOfficer | 10.0K | $1.50M | Nov 26, 202410b5-1 | Merrill Lynch | SEC |
| Nov 6, 20246:23 PM ET | Love Timothy MichaelOfficer | 600 | $84.5K | Nov 6, 2024 | Merrill Lynch | SEC |
| Nov 1, 20243:53 PM ET | Apple Robert EOfficer | 19.0K | $2.58M | Nov 1, 202410b5-1 | Merrill Lynch | SEC |
| Oct 8, 20244:17 PM ET | Apple Robert EOfficer | 177 | $22.9K | Oct 8, 202410b5-1 | Merrill Lynch | SEC |
| Oct 7, 20244:26 PM ET | Apple Robert EOfficer | 800 | $103.9K | Oct 7, 202410b5-1 | Merrill Lynch | SEC |
| Sep 20, 20244:08 PM ET | Apple Robert EOfficer | 20.0K | $2.53M | Sep 20, 202410b5-1 | Merrill Lynch | SEC |
| Aug 22, 20244:42 PM ET | Ernest N CsiszarDirector | 4.85K | $538.5K | Aug 22, 2024 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 13, 20244:39 PM ET | Palomarez Javier Albertoboard of director | 3.50K | $378.4K | May 13, 2024 | EDWARD JONES | SEC |
| Oct 2, 20236:44 PM ET | Love Timothy MichaelOfficer | 1.09K | $78.2K | Oct 2, 202310b5-1 | Merrill Lynch | SEC |
| Oct 2, 20234:06 PM ET | DiMarco PaulOfficer | 1.33K | $95.0K | Oct 2, 202310b5-1 | Merrill Lynch | SEC |