MasTec, Inc. (MTZ)
Infrastructure construction, 36,000 employees, 97% U.S.. Read October 2, 2026 from the annual report for the period ending December 31, 2025, filed February 26, 2026. Ranked 44 of the 47 Industrials companies read so far, by the share within reach now.
Within reach now
13%
End of 2028
22%
Employees, annual report
36,000
Leading staffing pattern
Utility System Construction
Share of the working time within reach, long-run pace, four times in five
- Now13%
- End of 202720%
- End of 202822%
- End of 203022%
What changes for its people by the end of 2028, by its industries' figures
- Stays with people 76%
- Becomes checking a model's work 19%
- Handed over with lighter checks 4%
The filing states the total, the union count and the U.S. share, nothing by segment, so the whole workforce takes the utility construction pattern by description (c).
The figures on this page come from the company's own annual report and from BLS staffing patterns for its industries, never from a roster. They are estimates with a stated method. Nothing here says what the company will do: within reach is not a forecast of jobs lost or of savings.
What follows from the reading
Share of working time within reach of AI, on the long-run pace at four in five: 13% now, 20% at the end of 2027, 22% at the end of 2028, 22% at the end of 2030. By the patterns, the work is about 22% desk work, 13% people work and 65% body work. These are the site's industry estimates weighted by the shares below: estimates with a stated method and range, not a forecast of what the company will do. By the same patterns, at the end of 2028 about 76% of the working time stays with people (conversation, in-person and hands-on work), 19% becomes checking a model's work and 4% could be handed over with lighter checks, from the industries' own figures, not the company's roles.
Headcount
36,000 employees as of December 31, 2025 (stated). Approximately 97% of employees are located in the United States.
The filing: “As of December 31, 2025, we had approximately 36,000 employees, of which approximately 9,000 were represented by unions or subject to collective bargaining agreements.”
The workforce as industry patterns
| Pattern | Share | Reason, from the filing |
|---|---|---|
| Utility System Construction | 100% | A builder of power, pipeline and communications infrastructure (Clean Energy and Infrastructure 46% of revenue, Communications 33%, Pipeline 21%); the filing states no count by segment, so one utility construction pattern by description (c). |
What the filing says about the workforce: About 36,000 employees at 810 locations, about 9,000 represented by unions or under collective bargaining agreements; about 97% in the United States; apprenticeship and leadership training programs.
Companies read with the same leading pattern
Other companies whose largest staffing pattern is also Utility System Construction, largest first, each read from its own annual report. Within reach now and at the end of 2028, long-run pace, four in five.
- Quanta Services, Inc. (PWR, 69,500 employees)13% now, 22% by 2028
What the filing says about AI
18 sentences in the filing name AI. Eighteen sentences: AI applications and data center growth as drivers of demand for its communications, power and infrastructure construction, and risk language.
- “These developments include (i) continued expansion in data consumption and the rapid deployment of artificial intelligence ("AI") applications and data centers; (ii) increasing levels of electrification across commercial, industrial and residential end‑users; (iii) ongoing transition of the U.S. energy mix toward lower‑carbon and renewable resources; and (iv) federal, state and local investment...”
- “We believe the following industry trends affect demand for our services: Opportunities in our Communications Segment Demand for seamless connectivity across wireless and wired devices continues to accelerate, driven by high-speed internet requirements, broadband expansion, AI data center growth, and data transmission, and such accelerated demand for connectivity continues to spur demand for fas...”
- “The proliferation of mobile devices, remote technologies, streaming, user generated content, e-commerce, AI applications, and the "Internet of Things (IoT)" is creating significant pressure for new and upgraded networks to meet increasing data traffic and reliability demands of these technologies.”
- “Companies are making substantial investments in data centers to support AI initiatives, with robust fiber networks and connectivity serving as key growth drivers.”
- “Telecommunications providers have invested and continue to invest significant capital and other resources to deliver advanced telecommunications, and more recently, to enable enhanced AI applications, by deploying the latest infrastructure and are projected to play a significant role in shaping the future as both commercial and consumer markets continue to leverage 5G wireless technology. 5G mo...”
Its annual reports, year by year
Sentences naming AI in each annual report, counted by one rule, beside the median report in the Index that year. Each count links its filing. Every company, by year and sector
- Fiscal 20211median 0
- Fiscal 20222median 0
- Fiscal 20234median 1
- Fiscal 202411median 4
- Fiscal 202518median 10
Headcount by filing year
As reported in each year's annual report, with the filing. A year marked not read had no figure the reading could take from the report's text.
| Period | Employees | Filed | Filing |
|---|---|---|---|
| 2025-12-31 | 36,000 | 2026-02-26 | 10-K |
| 2024-12-31 | 33,000 | 2025-02-28 | 10-K |
| 2023-12-31 | 34,000 | 2024-03-01 | 10-K |
| 2022-12-31 | 32,000 | 2023-03-16 | 10-K |
| 2021-12-31 | 27,000 | 2022-03-01 | 10-K |
| 2020-12-31 | 18,000 | 2021-02-25 | 10-K |
| 2019-12-31 | 21,000 | 2020-02-27 | 10-K |
| 2018-12-31 | 19,000 | 2019-02-28 | 10-K |
| 2017-12-31 | 17,300 | 2018-02-27 | 10-K |
| 2016-12-31 | 15,400 | 2017-02-24 | 10-K |
| 2015-12-31 | 15,900 | 2016-02-26 | 10-K |
| 2014-12-31 | 15,550 | 2015-07-31 | 10-K |
| 2013-12-31 | 13,450 | 2014-02-27 | 10-K |
| 2012-12-31 | 12,300 | 2013-02-28 | 10-K |
| 2011-12-31 | 10,000 | 2012-02-29 | 10-K |
| 2010-12-31 | 9,400 | 2011-02-23 | 10-K |
| 2009-12-31 | 8,600 | 2010-02-25 | 10-K |
| 2008-12-31 | 8,400 | 2009-03-02 | 10-K |
| 2007-12-31 | 8,240 | 2008-02-28 | 10-K |
| 2006-12-31 | 9,260 | 2007-03-08 | 10-K |
| 2005-12-31 | 7,700 | 2006-03-01 | 10-K |
| 2004-12-31 | 7,750 | 2005-03-31 | 10-K |
| 2003-12-31 | 7,200 | 2004-07-29 | 10-K |
| 2002-12-31 | 7,100 | 2003-04-09 | 10-K |
| 2001-12-31 | 10,400 | 2002-03-28 | 10-K |
| 2000-12-31 | 12,400 | 2001-03-26 | 10-K |
| 1999-12-31 | 9,900 | 2000-02-04 | 10-K |
| 1998-12-31 | 8,250 | 1999-04-01 | 10-K |
| 1997-12-31 | 7,850 | 1998-03-31 | 10-K |
| 1996-12-31 | 5,800 | 1997-03-26 | 10-K |
| 1995-12-31 | 2,313 | 1996-03-29 | 10-K |
| 1994-12-31 | 2,361 | 1995-03-29 | 10-K |
| 1993-12-31 | 437 | 1994-06-10 | 10-K |
Limits of this reading
- No count by segment: one utility construction pattern by description (c).
Source: the company's annual report on EDGAR, accession 0000015615-26-000020, the filing. Read by Claude Fable 5.1 under rubric version 1, by the method. A company can write to info@stratussc.com to have its reading checked against its filing.
Questions about this company
- How much of MasTec, Inc.'s working time is within reach of AI?
- An estimated 13% now and 22% by the end of 2028, on METR's long-run pace at four in five, from the workforce MasTec, Inc.'s own annual report describes and BLS staffing patterns for its industries, never from a roster. It is an estimate with a stated method. It is not a forecast of jobs lost or of savings, and it says nothing about what the company will do.
- How many people does MasTec, Inc. employ?
- 36,000 as of December 31, 2025, as its annual report for the period ending December 31, 2025 states. About 97% in the U.S.
- What kinds of work make up MasTec, Inc.'s workforce?
- Read from its annual report as a blend of 1 industry staffing pattern, the largest Utility System Construction; by those patterns the work is about 22% desk work, 13% people work and 65% body work. Each share has a one-sentence reason on this page that can be checked against the filing.
- What does MasTec, Inc.'s annual report say about AI?
- 18 sentences in the filing name AI. Its annual reports for fiscal 2021 to 2025 name it in 1, 2, 4, 11 and 18 sentences, year by year. They are counted and quoted on this page, never judged: a count says how much a filing talks about AI, not what the company does with it.
- How is this estimated?
- Claude Fable 5.1 read the annual report under the Index's written rubric (version 1) on October 2, 2026: the stated headcount, the share in the U.S. when stated, and the workforce as a blend of industry staffing patterns. The estimates are the site's industry estimates weighted by those shares, from O*NET tasks with estimated lengths and METR's measurements of how long a task AI models can finish. A company can write to info@stratussc.com to have its reading checked against its filing.
Embed these figures on your site
A small card with the share of working time within reach now and at the end of 2027, 2028 and 2030, the date and a link back. Free under CC BY 4.0; the card carries the credit.