MasTec, Inc.
US ˙ NYSE ˙ US5763231090

SecurityMTZ / MasTec, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership472,583 shares
Latest Disclosed Value $ 152,048,855
Northern Trust Corp reports 3.68% increase in ownership of MTZ / MasTec, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 472,583 shares of MasTec, Inc. (US:MTZ) valued at $152,048,854 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 455,797 shares of MasTec, Inc.. This represents a change in shares of 3.68% during the quarter. The current value of the position is $177,091,028 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)
2026-05-14 2026-03-31 13F MASTEC COM 576323109 472,583 16,786 3.68 152,049 53.47 0.0041
2026-02-17 2025-12-31 13F MASTEC COM 576323109 455,797 -16,806 -3.56 99,077 -1.49 0.0026
2025-11-14 2025-09-30 13F MASTEC COM 576323109 472,603 -7,597 -1.58 100,575 22.89 0.0029
2025-08-13 2025-06-30 13F MASTEC COM 576323109 480,200 -14,938 -3.02 81,840 41.62 0.0113
2025-05-13 2025-03-31 13F MASTEC COM 576323109 495,138 -26,004 -4.99 57,788 -18.55 0.0086
2025-02-14 2024-12-31 13F MASTEC COM 576323109 521,142 59,130 12.80 70,948 24.75 0.0100
2024-11-13 2024-09-30 13F MASTEC COM 576323109 462,012 -12,297 -2.59 56,874 12.07 0.0093
2024-08-14 2024-06-30 13F MASTEC COM 576323109 474,309 85,555 22.01 50,746 39.99 0.0086
2024-05-14 2024-03-31 13F MASTEC COM 576323109 388,754 -54,762 -12.35 36,251 7.94 0.0063
2024-02-13 2023-12-31 13F MASTEC COM 576323109 443,516 8,183 1.88 33,583 7.19 0.0061
2023-11-13 2023-09-30 13F MASTEC COM 576323109 435,333 -4,545 -1.03 31,331 -39.62 0.0061
2023-08-11 2023-06-30 13F MASTEC COM 576323109 439,878 -14,530 -3.20 51,892 20.92 0.0100
2023-05-15 2023-03-31 13F MASTEC COM 576323109 454,408 4,056 0.90 42,914 11.67 0.0085
2023-02-13 2022-12-31 13F MASTEC COM 576323109 450,352 -16,635 -3.56 38,429 29.59 0.0081
2022-11-14 2022-09-30 13F MASTEC COM 576323109 466,987 -5,055 -1.07 29,654 -12.33 0.0068
2022-08-12 2022-06-30 13F MASTEC COM 576323109 472,042 13,689 2.99 33,826 -15.27 0.0072
2022-05-13 2022-03-31 13F MASTEC COM 576323109 458,353 3,294 0.72 39,923 -4.93 0.0070
2022-02-08 2021-12-31 13F MASTEC COM 576323109 455,059 -36,167 -7.36 41,992 -0.92 0.0069
2021-11-15 2021-09-30 13F MASTEC COM 576323109 491,226 -1,229 -0.25 42,383 -18.88 0.0075
2021-08-13 2021-06-30 13F MASTEC COM 576323109 492,455 -486,179 -49.68 52,248 -43.02 0.0092
2021-05-12 2021-03-31 13F MASTEC COM 576323109 978,634 -158,693 -13.95 91,699 18.26 0.0171
2021-02-11 2020-12-31 13F MASTEC COM 576323109 1,137,327 -17,478 -1.51 77,543 59.11 0.0151
2020-11-16 2020-09-30 13F MASTEC COM 576323109 1,154,805 -53,579 -4.43 48,734 -10.12 0.0107
2020-08-14 2020-06-30 13F MASTEC COM 576323109 1,208,384 216,498 21.83 54,220 67.02 0.0128
2020-05-14 2020-03-31 13F MASTEC COM 576323109 991,886 5,581 0.57 32,464 -48.70 0.0093
2020-02-14 2019-12-31 13F MASTEC COM 576323109 986,305 -25,459 -2.52 63,281 -3.67 0.0142
2019-11-13 2019-09-30 13F MASTEC COM 576323109 1,011,764 -17,728 -1.72 65,694 23.83 0.0157
2019-08-13 2019-06-30 13F MASTEC COM 576323109 1,029,492 9,629 0.94 53,050 8.14 0.0126
2019-05-13 2019-03-31 13F MASTEC COM 576323109 1,019,863 4,582 0.45 49,055 19.13 0.0121
2019-02-12 2018-12-31 13F MASTEC COM 576323109 1,015,281 158,379 18.48 41,179 7.63 0.0115
2018-11-14 2018-09-30 13F MASTEC COM 576323109 856,902 15,785 1.88 38,261 -10.37 0.0094
2018-09-18 2018-06-30 13F/A-1 MASTEC COM 576323109 841,117 -1,493 -0.18 42,687 7.67 0.0108
2018-08-14 2018-06-30 13F MASTEC COM 576323109 847,446 4,836 43,009
2018-05-09 2018-03-31 13F MASTEC COM 576323109 842,610 -12,612 -1.47 39,645 -5.30 0.0103
2018-02-14 2017-12-31 13F MASTEC COM 576323109 855,222 -16,860 -1.93 41,863 3.45 0.0106
2017-11-13 2017-09-30 13F MASTEC COM 576323109 872,082 -16,142 -1.82 40,465 0.90 0.0105
2017-08-11 2017-06-30 13F MASTEC COM 576323109 888,224 25,625 2.97 40,103 16.08 0.0112
2017-05-12 2017-03-31 13F MASTEC COM 576323109 862,599 6,433 0.75 34,547 5.49 0.0100
2017-02-13 2016-12-31 13F MASTEC COM 576323109 856,166 -54,517 -5.99 32,748 20.91 0.0100
2016-11-09 2016-09-30 13F MASTEC COM 576323109 910,683 989 0.11 27,084 33.39 0.0084
2016-08-12 2016-06-30 13F MASTEC COM 576323109 909,694 96,794 11.91 20,304 26.67 0.0066
2016-08-19 2016-03-31 13F/A-1 MASTEC COM 576323109 812,900 6,809 0.84 16,029 14.40 0.0053
2016-05-13 2016-03-31 13F Mastec COMM 576323109 812,895 16,453
2016-02-12 2015-12-31 13F Mastec COMM 576323109 806,091 20,810 2.65 14,011 12.72 0.0046
2015-11-12 2015-09-30 13F Mastec COMM 576323109 785,281 785,281 0.00 12,430 0.0041
2015-08-13 2015-06-30 13F Mastec COMM 576323109 0 -845,673 -100.00 0 -100.00
2015-05-14 2015-03-31 13F Mastec COMM 576323109 845,673 -90,910 -9.71 16,321 -22.93 0.0049
2015-02-12 2014-12-31 13F Mastec COM 576323109 936,583 43,300 4.85 21,177 -22.58 0.0064
2014-11-13 2014-09-30 13F Mastec COMM 576323109 893,283 120,311 15.56 27,352 14.81 0.0086
2014-08-14 2014-06-30 13F MASTEC com 576323109 772,972 -163,892 -17.49 23,823 -41.46 0.0074
2014-05-14 2014-03-31 13F MASTEC COMM 576323109 936,864 59,828 6.82 40,697 41.82 0.0128
2014-02-21 2013-12-31 13F/A-1 MASTEC COM 576323109 877,036 -16,855 -1.89 28,697 5.96 0.0092
2014-02-12 2013-12-31 13F MASTEC COM 576323109 877,036 28,697
2013-11-13 2013-09-30 13F MASTEC COM 576323109 893,891 19,101 2.18 27,084 -5.89 0.0095
2013-08-09 2013-06-30 13F MASTEC COM 576323109 874,790 874,790 28,780 0.0104
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.