MasTec, Inc.
US ˙ NYSE ˙ US5763231090

SecurityMTZ / MasTec, Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership32,329 shares
Latest Disclosed Value $ 10,401,532
Stifel Financial Corp reports 40.80% increase in ownership of MTZ / MasTec, Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 32,329 shares of MasTec, Inc. (US:MTZ) valued at $10,401,532 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 22,961 shares of MasTec, Inc.. This represents a change in shares of 40.80% during the quarter. The current value of the position is $12,114,646 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-12 2026-03-31 13F MASTEC COM 576323109 32,329 9,368 40.80 10,402 108.40 0.0022
2026-02-13 2025-12-31 13F MASTEC COM 576323109 22,961 -460 -1.96 4,991 0.14 0.0045
2025-11-12 2025-09-30 13F MASTEC COM 576323109 23,421 251 1.08 4,984 26.24 0.0046
2025-08-14 2025-06-30 13F MASTEC COM 576323109 23,170 -142 -0.61 3,949 45.15 0.0038
2025-05-14 2025-03-31 13F MASTEC COM 576323109 23,312 11,524 97.76 2,721 69.58 0.0029
2025-02-13 2024-12-31 13F MASTEC COM 576323109 11,788 1,683 16.66 1,605 29.04 0.0017
2024-11-14 2024-09-30 13F MASTEC COM 576323109 10,105 271 2.76 1,244 18.16 0.0013
2024-08-13 2024-06-30 13F MASTEC COM 576323109 9,834 742 8.16 1,052 24.20 0.0012
2024-05-14 2024-03-31 13F MASTEC COM 576323109 9,092 -18 -0.20 848 22.93 0.0010
2024-02-12 2023-12-31 13F MASTEC COM 576323109 9,110 -8,528 -48.35 690 -45.71 0.0009
2023-11-13 2023-09-30 13F MASTEC COM 576323109 17,638 -30,773 -63.57 1,269 -77.78 0.0018
2023-08-14 2023-06-30 13F MASTEC COM 576323109 48,411 376 0.78 5,711 25.90 0.0078
2023-05-12 2023-03-31 13F MASTEC COM 576323109 48,035 24,688 105.74 4,536 127.71 0.0065
2023-02-13 2022-12-31 13F MASTEC COM 576323109 23,347 -1,054 -4.32 1,992 28.52 0.0030
2022-11-14 2022-09-30 13F MASTEC COM 576323109 24,401 1,751 7.73 1,550 -4.50 0.0025
2022-08-15 2022-06-30 13F MASTEC COM 576323109 22,650 -711 -3.04 1,623 -20.25 0.0025
2022-05-13 2022-03-31 13F MASTEC COM 576323109 23,361 -2,584 -9.96 2,035 -15.00 0.0028
2022-02-14 2021-12-31 13F MASTEC COM 576323109 25,945 6,073 30.56 2,394 39.59 0.0032
2021-11-15 2021-09-30 13F MASTEC COM 576323109 19,872 -8,191 -29.19 1,715 -42.41 0.0025
2021-08-13 2021-06-30 13F MASTEC COM 576323109 28,063 13,010 86.43 2,978 111.21 0.0045
2021-05-14 2021-03-31 13F MASTEC COM 576323109 15,053 147 0.99 1,410 38.78 0.0023
2021-02-12 2020-12-31 13F MASTEC COM 576323109 14,906 -2,267 -13.20 1,016 40.14 0.0018
2020-11-16 2020-09-30 13F MASTEC COM 576323109 17,173 -8,122 -32.11 725 -36.12 0.0015
2020-08-14 2020-06-30 13F MASTEC COM 576323109 25,295 3,634 16.78 1,135 59.41 0.0026
2020-05-14 2020-03-31 13F MASTEC COM 576323109 21,661 -15,417 -41.58 712 -70.00 0.0020
2020-02-13 2019-12-31 13F MASTEC COM 576323109 37,078 11,542 45.20 2,373 43.64 0.0049
2019-11-19 2019-09-30 13F/A-1 MASTEC COM 576323109 25,536 -18,004 -41.35 1,652 -26.02 0.0042
2019-11-13 2019-09-30 13F MASTEC COM 576323109 25,636 -17,904 1,658 929.3921
2019-08-14 2019-06-30 13F MASTEC COM 576323109 43,540 2,521 6.15 2,233 12.32 0.0058
2019-05-14 2019-03-31 13F MASTEC COM 576323109 41,019 3,450 9.18 1,988 31.74 0.0056
2019-02-13 2018-12-31 13F MASTEC COM 576323109 37,569 -1,216 -3.14 1,509 -11.65 0.0049
2018-11-13 2018-09-30 13F MASTEC COM 576323109 38,785 -3,541 -8.37 1,708 -20.34 0.0049
2018-08-14 2018-06-30 13F MASTEC COM 576323109 42,326 1,516 3.71 2,144 11.55 0.0066
2018-05-11 2018-03-31 13F MASTEC COM 576323109 40,810 6,191 17.88 1,922 12.73 0.0061
2018-02-14 2017-12-31 13F MASTEC COM 576323109 34,619 -1,291 -3.60 1,705 2.03 0.0054
2017-11-13 2017-09-30 13F MASTEC COM 576323109 35,910 20,306 130.13 1,671 132.41 0.0058
2017-08-14 2017-06-30 13F MASTEC COM 576323109 15,604 5,877 60.42 719 84.36 0.0027
2017-05-10 2017-03-31 13F MASTEC COM 576323109 9,727 2,190 29.06 390 34.48 0.0015
2017-02-16 2016-12-31 13F MASTEC COM 576323109 7,537 -446 -5.59 290 20.83 0.0012
2016-11-15 2016-09-30 13F MASTEC COM 576323109 7,983 -1,626 -16.92 240 11.63 0.0011
2016-08-17 2016-06-30 13F MASTEC COM 576323109 9,609 -2,681 -21.81 215 -13.65 0.0010
2016-05-16 2016-03-31 13F MASTEC COM 576323109 12,290 -1,255 -9.27 249 5.51 0.0013
2016-03-21 2015-12-31 13F/A-2 MASTEC COM 576323109 13,545 -7,005 -34.09 236 -27.38 0.0012
2016-02-26 2015-12-31 13F/A-1 MASTEC COM 576323109 13,545 0 236 0.0012
2016-02-16 2015-12-31 13F MASTEC COM 576323109 13,545 236
2015-11-16 2015-09-30 13F MASTEC COM 576323109 20,550 -7,855 -27.65 325 -42.38 0.0018
2015-08-17 2015-06-30 13F/A-1 MASTEC COM 576323109 28,405 -2,814 -9.01 564 -6.47 0.0029
2015-08-17 2015-06-30 13F MASTEC COM 576323109 28,405 564
2015-05-14 2015-03-31 13F MASTEC COM 576323109 31,219 -5,923 -15.95 603 -28.21 0.0033
2015-02-13 2014-12-31 13F MASTEC COM 576323109 37,142 -11,371 -23.44 840 -43.43 0.0047
2014-11-13 2014-09-30 13F MASTEC COM 576323109 48,513 11,436 30.84 1,485 29.92 0.0130
2014-08-14 2014-06-30 13F MASTEC COM 576323109 37,077 10,790 41.05 1,143 0.09 0.0103
2014-05-15 2014-03-31 13F MASTEC COM 576323109 26,287 26,287 1,142 0.0109
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.