MasTec, Inc.
US ˙ NYSE ˙ US5763231090

SecurityMTZ / MasTec, Inc.
InstitutionLazard Asset Management Llc
Latest Disclosed Ownership12,066 shares
Latest Disclosed Value $ 3,882,115
Lazard Asset Management Llc reports 82.09% decrease in ownership of MTZ / MasTec, Inc.

On May 15, 2026 - Lazard Asset Management Llc filed a 13F-HR form disclosing ownership of 12,066 shares of MasTec, Inc. (US:MTZ) valued at $3,882,115 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 67,356 shares of MasTec, Inc.. This represents a change in shares of -82.09% during the quarter. The current value of the position is $4,390,697 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MASTEC COM 576323109 12,066 -55,290 -82.09 3,882 -73.49 0.0033
2026-02-17 2025-12-31 13F MASTEC COM 576323109 67,356 -92,594 -57.89 14,641 -56.99 0.0248
2025-11-14 2025-09-30 13F MASTEC COM 576323109 159,950 85,305 114.28 34,039 283,550.00 0.0458
2025-08-14 2025-06-30 13F MASTEC Common Stock 576323109 74,645 72,255 3,023.22 13 0.0175
2025-05-15 2025-03-31 13F MASTEC Common Stock 576323109 2,390 1,764 281.79 0 0.0004
2025-02-14 2024-12-31 13F MASTEC Common Stock 576323109 626 -44 -6.57 0 0.0001
2024-11-14 2024-09-30 13F MASTEC Common Stock 576323109 670 0 0.00 0 0.0001
2024-08-14 2024-06-30 13F MASTEC Common Stock 576323109 670 670 0 0.0001
2024-02-14 2023-12-31 13F MASTEC Common Stock 576323109 0 -821 -100.00 0 0.0000
2023-11-14 2023-09-30 13F MASTEC Common Stock 576323109 821 281 52.04 0 0.0001
2023-08-15 2023-06-30 13F MASTEC Common Stock 576323109 540 0 0.00 0 0.0001
2023-05-15 2023-03-31 13F MASTEC Common Stock 576323109 540 52 10.66 0 -100.00 0.0001
2023-02-15 2022-12-31 13F MASTEC Common Stock 576323109 488 -131 -21.16 41 5.13 0.0001
2022-11-14 2022-09-30 13F MASTEC Common Stock 576323109 619 0 0.00 39 -11.36 0.0001
2022-08-09 2022-06-30 13F MASTEC Common Stock 576323109 619 0 0.00 44 -16.98 0.0001
2022-05-13 2022-03-31 13F MASTEC Common Stock 576323109 619 619 53 0.0001
2021-11-15 2021-09-30 13F MASTEC Common Stock 576323109 0 -264 -100.00 0 -100.00
2021-08-12 2021-06-30 13F MASTEC Common Stock 576323109 264 264 28 0.0000
2021-05-14 2021-03-31 13F MASTEC Common Stock 576323109 0 -29,073 -100.00 0 -100.00
2021-02-11 2020-12-31 13F MASTEC Common Stock 576323109 29,073 6,217 27.20 1,982 105.60 0.0025
2020-11-13 2020-09-30 13F MASTEC Common Stock 576323109 22,856 -200 -0.87 964 -6.77 0.0014
2020-08-13 2020-06-30 13F MASTEC Common Stock 576323109 23,056 4,974 27.51 1,034 74.96 0.0016
2020-05-14 2020-03-31 13F MASTEC Common Stock 576323109 18,082 -155,948 -89.61 591 -94.71 0.0011
2020-02-13 2019-12-31 13F MASTEC Common Stock 576323109 174,030 116,732 203.73 11,164 200.11 0.0159
2019-11-14 2019-09-30 13F MASTEC Common Stock 576323109 57,298 57,298 -67.08 3,720 -66.68 0.0061
2016-05-12 2016-03-31 13F MASTEC Common Stock 576323109 0 0 0 0.0000
2019-07-15 2015-09-30 13F/A-1 MASTEC Common Stock 576323109 0 -317,802 -100.00 0 -100.00
2019-07-08 2015-06-30 13F/A-1 MASTEC Common Stock 576323109 317,802 0 0.00 6,314 2.95 0.0132
2015-08-13 2015-06-30 13F MASTEC Common Stock 576323109 317,802 6,314
2015-06-09 2015-03-31 13F/A-1 MASTEC Common Stock 576323109 317,802 -75,578 -19.21 6,133 -31.04 0.0132
2015-05-15 2015-03-31 13F MASTEC Common Stock 576323109 317,802 6,133
2019-08-29 2014-12-31 13F/A-3 MASTEC Common Stock 576323109 393,380 128,281 48.39 8,894 9.57 0.0190
2015-06-09 2014-12-31 13F/A-2 MASTEC Common Stock 576323109 393,380 0 8,894 0.0203
2015-02-12 2014-12-31 13F MASTEC Common Stock 576323109 393,380 8,894
2014-11-07 2014-09-30 13F MASTEC Common Stock 576323109 265,099 -159,659 -37.59 8,117 -38.00 0.0174
2014-08-12 2014-06-30 13F MASTEC Common Stock 576323109 424,758 236,968 126.19 13,091 60.49 0.0274
2014-05-12 2014-03-31 13F MASTEC Common Stock 576323109 187,790 -179,914 -48.93 8,157 -32.20 0.0182
2014-02-14 2013-12-31 13F MASTEC Common Stock 576323109 367,704 -7,962 -2.12 12,031 5.70 0.0267
2014-01-13 2013-09-30 13F/A-1 MASTEC Common Stock 576323109 375,666 -7,151 -1.87 11,382 -9.62 0.0270
2013-11-13 2013-09-30 13F MASTEC Common Stock 576323109 375,666 11,382
2013-08-13 2013-06-30 13F MASTEC Common Stock 576323109 382,817 382,817 12,594 0.0298
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.