MasTec, Inc.
US ˙ NYSE ˙ US5763231090

SecurityMTZ / MasTec, Inc.
InstitutionKBC Group NV
Latest Disclosed Ownership1,972 shares
Latest Disclosed Value $ 634
KBC Group NV reports 11.29% increase in ownership of MTZ / MasTec, Inc.

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 1,972 shares of MasTec, Inc. (US:MTZ) valued at $634,471 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 1,772 shares of MasTec, Inc.. The current value of the position is $728,970 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)
2026-05-07 2026-03-31 13F MASTEC COM 576323109 1,972 200 11.29 1 0.0008
2026-01-26 2025-12-31 13F MASTEC COM 576323109 1,772 0 0.00 0 0.0009
2026-01-20 2025-09-30 13F MASTEC COM 576323109 1,772 0 0.00 0 0.0009
2025-08-08 2025-06-30 13F MASTEC COM 576323109 1,772 -1,001 -36.10 0 0.0008
2025-04-25 2025-03-31 13F MASTEC COM 576323109 2,773 266 10.61 0 0.0010
2025-01-22 2024-12-31 13F MASTEC COM 576323109 2,507 804 47.21 0 0.0009
2024-11-06 2024-09-30 13F MASTEC COM 576323109 1,703 0 0.00 0 0.0006
2024-07-17 2024-06-30 13F MASTEC COM 576323109 1,703 198 13.16 0 0.0005
2024-05-08 2024-03-31 13F MASTEC COM 576323109 1,505 283 23.16 0 0.0004
2024-02-13 2023-12-31 13F MASTEC COM 576323109 1,222 0 0.00 0 0.0003
2024-02-15 2023-09-30 13F/A-1 MASTEC COM 576323109 1,222 1,222 0 0.0004
2024-02-14 2022-06-30 13F/A-1 MASTEC COM 576323109 0 -1,267 -100.00 0 -100.00 0.0000
2022-07-26 2022-06-30 13F MASTEC COM 576323109 0 -1,267 0
2024-02-14 2022-03-31 13F/A-1 MASTEC COM 576323109 1,267 -1,638 -56.39 0 0.0004
2022-05-06 2022-03-31 13F MASTEC COM 576323109 1,267 -1,638 110 0.0004
2024-02-14 2021-12-31 13F/A-1 MASTEC COM 576323109 2,905 0 0.00 0 -100.00 0.0009
2022-02-03 2021-12-31 13F MASTEC COM 576323109 2,905 0 268 0.0008
2021-11-10 2021-09-30 13F MASTEC COM 576323109 2,905 0 0.00 251 -18.51 0.0009
2022-02-15 2021-06-30 13F/A-1 MASTEC COM 576323109 2,905 0 0.00 308 13.24 0.0011
2021-08-11 2021-06-30 13F MASTEC COM 576323109 2,905 0 308 0.0011
2022-02-14 2021-03-31 13F/A-1 MASTEC COM 576323109 2,905 0 0.00 272 -86.27 0.0011
2021-04-26 2021-03-31 13F MASTEC COM 576323109 2,905 0 272 0.0011
2022-02-14 2020-12-31 13F/A-1 MASTEC COM 576323109 2,905 0 0.00 1,981 1,510.57 0.0009
2021-02-10 2020-12-31 13F MASTEC COM 576323109 2,905 0 198 0.0009
2022-02-14 2020-09-30 13F/A-1 MASTEC COM 576323109 2,905 -35,440 -92.42 123 -92.85 0.0007
2020-10-28 2020-09-30 13F MASTEC COM 576323109 2,905 -35,440 123 0.0007
2022-02-14 2020-06-30 13F/A-1 MASTEC COM 576323109 38,345 -119,304 -75.68 1,721 -66.65 0.0114
2020-08-10 2020-06-30 13F MASTEC COM 576323109 38,345 -119,304 1,721 0.0115
2020-05-04 2020-03-31 13F MASTEC COM 576323109 157,649 -26,435 -14.36 5,160 -56.31 0.0432
2020-02-11 2019-12-31 13F MASTEC COM 576323109 184,084 43,215 30.68 11,811 29.14 0.0747
2019-11-07 2019-09-30 13F MASTEC COM 576323109 140,869 -23,839 -14.47 9,146 7.76 0.0671
2019-08-08 2019-06-30 13F/A-1 MASTEC COM 576323109 164,708 -21,719 -11.65 8,487 -5.35 0.0657
2019-07-30 2019-06-30 13F MASTEC COM 576323109 164,708 -21,719 8,487
2019-08-07 2019-03-31 13F/A-1 MASTEC COM 576323109 186,427 0 0.00 8,967 18.60 0.0739
2019-05-10 2019-03-31 13F MASTEC COM 576323109 186,427 0 8,967
2019-01-31 2018-12-31 13F MASTEC COM 576323109 186,427 -22,648 -10.83 7,561 -19.00 0.0842
2018-11-14 2018-09-30 13F MASTEC COM 576323109 209,075 200,079 2,224.09 9,335 1,942.67 0.0706
2018-08-03 2018-06-30 13F MASTEC COM 576323109 8,996 0 0.00 457 8.04 0.0040
2018-08-03 2018-03-31 13F/A-1 MASTEC COM 576323109 8,996 2,522 38.96 423 33.44 0.0039
2018-05-09 2018-03-31 13F MASTEC COM 576323109 8,996 2,522 423
2018-08-03 2017-12-31 13F/A-1 MASTEC COM 576323109 6,474 0 0.00 317 5.67 0.0027
2018-02-07 2017-12-31 13F MASTEC COM 576323109 6,474 0 317
2017-11-13 2017-09-30 13F MASTEC COM 576323109 6,474 0 0.00 300 2.74 0.0027
2017-08-04 2017-06-30 13F MASTEC COM 576323109 6,474 0 0.00 292 12.74 0.0028
2017-05-10 2017-03-31 13F MASTEC COM 576323109 6,474 -8,100 -55.58 259 -53.50 0.0023
2017-02-16 2016-12-31 13F MASTEC COM 576323109 14,574 437 3.09 557 32.62 0.0055
2016-11-03 2016-09-30 13F MASTEC COM 576323109 14,137 -6,465 -31.38 420 -8.70 0.0050
2016-08-03 2016-06-30 13F MASTEC COM 576323109 20,602 0 0.00 460 10.31 0.0066
2016-05-11 2016-03-31 13F MASTEC COM 576323109 20,602 11,250 120.30 417 155.83 0.0069
2016-02-11 2015-12-31 13F MASTEC COM 576323109 9,352 5,179 124.11 163 146.97 0.0030
2015-11-12 2015-09-30 13F MASTEC COM 576323109 4,173 0 0.00 66 -20.48 0.0013
2015-12-16 2015-06-30 13F/A-1 MASTEC COM 576323109 4,173 -381,787 -98.92 83 -98.89 0.0011
2015-07-31 2015-06-30 13F MASTEC COM 576323109 4,173 83
2015-12-16 2015-03-31 13F/A-1 MASTEC COM 576323109 385,960 181,751 89.00 7,449 61.34 0.0946
2015-04-30 2015-03-31 13F MASTEC COM 576323109 385,960 7,449
2015-12-15 2014-12-31 13F/A-1 MASTEC COM 576323109 204,209 201,430 7,248.29 4,617 5,331.76 0.0550
2015-02-12 2014-12-31 13F MASTEC COM 576323109 204,209 4,617
2014-10-16 2014-09-30 13F MASTEC COM 576323109 2,779 -215,933 -98.73 85 -98.74 0.0030
2014-08-01 2014-06-30 13F MASTEC COM 576323109 218,712 138,376 172.25 6,741 93.15 0.0770
2014-04-30 2014-03-31 13F MASTEC COM 576323109 80,336 19,987 33.12 3,490 76.71 0.0551
2014-01-21 2013-12-31 13F MASTEC COM 576323109 60,349 -19,890 -24.79 1,975 -18.79 0.0299
2013-11-06 2013-09-30 13F MASTEC COM 576323109 80,239 16,739 26.36 2,432 16.42 0.0391
2013-07-29 2013-06-30 13F MASTEC COM 576323109 63,500 63,500 2,089 0.0388
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.