# MASTEC INC (MTZ) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 576323109
Page URL: https://superinvestorclub.com/stock/MTZ
Last updated: 2026-07-08T12:26:07.056Z

## Summary

As of the most recent 13F filing period, MASTEC INC (MTZ) is held by 5 tracked superinvestors with an aggregate position value of $796.8M representing 01531050583597320000401381681 shares.

## Top institutional holders (5)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Stephen Mandel](https://superinvestorclub.com/manager/61) | Lone Pine Capital | 1531050 | $492.6M | 3.93% | 2026-03-31 |
| 2 | [Philippe Laffont](https://superinvestorclub.com/manager/60) | Coatue Management | 583597 | $187.8M | 0.65% | 2026-03-31 |
| 3 | [Daniel Loeb](https://superinvestorclub.com/manager/9) | Third Point | 320000 | $103.0M | 4.94% | 2026-03-31 |
| 4 | [Ray Dalio](https://superinvestorclub.com/manager/6) | Bridgewater Associates | 40138 | $12.9M | 0.06% | 2026-03-31 |
| 5 | [FPA Queens Road](https://superinvestorclub.com/manager/97) | Bragg Financial Advisors | 1681 | $540,845 | 0.02% | 2026-03-31 |

## Ownership history (quarter-over-quarter)

- 2024-12-31: 1 holders, $291,068 aggregate, 02138 shares
- 2025-03-31: 1 holders, $224,200 aggregate, 01921 shares
- 2025-06-30: 2 holders, $5.5M aggregate, 0306801821 shares
- 2025-09-30: 2 holders, $154.7M aggregate, 07250001821 shares
- 2025-12-31: 4 holders, $351.1M aggregate, 0925000677909107241711 shares
- 2026-03-31: 5 holders, $796.8M aggregate, 01531050583597320000401381681 shares

## Recent congressional trades (7)

- 2025-12-18: Markwayne Mullin (Republican-OK) sale $15,001 - $50,000
- 2025-10-31: Lisa McClain (Republican-MI) sale $1,001 - $15,000
- 2025-10-30: Lisa McClain (Republican-MI) purchase $1,001 - $15,000
- 2025-10-30: Lisa McClain (Republican-MI) sale $1,001 - $15,000
- 2025-06-11: Lisa McClain (Republican-MI) purchase $1,001 - $15,000
- 2025-02-03: Markwayne Mullin (Republican-OK) purchase $1,001 - $15,000
- 2025-01-02: Markwayne Mullin (Republican-OK) purchase $15,001 - $50,000

## Recent insider transactions (0)


## Citation

When citing, use: "MASTEC INC (MTZ) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/MTZ), aggregating SEC 13F, Form 4, and congressional disclosures."