MasTec, Inc.
DE ˙ DB ˙ US5763231090
314,50 € ↓ -9,90 (-3,05%)
2026-06-04
PREZZO DELLE AZIONI
SecurityDE:MY8 / MasTec, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership86,045 shares
Latest Disclosed Value $ 18,703,602
Alliancebernstein L.p. reports 33.33% decrease in ownership of MY8 / MasTec, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 86,045 shares of MasTec, Inc. (DE:MY8) valued at $22,887,970 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 129,063 shares of MasTec, Inc.. This represents a change in shares of -33.33% during the quarter. The current value of the position is $27,061,152 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 86,045 -43,018 -33.33 18,704 -33.33 0.0051
2026-02-17 2025-12-31 13F MASTEC COM 576323109 129,063 3,477 2.77 28,054 4.97 0.0089
2025-11-14 2025-09-30 13F MASTEC COM 576323109 125,586 -145,631 -53.70 26,726 -42.18 0.0084
2025-08-14 2025-06-30 13F MASTEC COM 576323109 271,217 -691,433 -71.83 46,224 -58.86 0.0151
2025-05-15 2025-03-31 13F MASTEC COM 576323109 962,650 -182,076 -15.91 112,351 -27.91 0.0406
2025-02-12 2024-12-31 13F MASTEC COM 576323109 1,144,726 -264,118 -18.75 155,843 -10.14 0.0529
2024-11-14 2024-09-30 13F MASTEC COM 576323109 1,408,844 -1,050,447 -42.71 173,429 -34.09 0.0582
2024-08-14 2024-06-30 13F MASTEC COM 576323109 2,459,291 -500,286 -16.90 263,120 -4.66 0.0918
2024-05-14 2024-03-31 13F MASTEC COM 576323109 2,959,577 -515,167 -14.83 275,981 4.89 0.0977
2024-02-14 2023-12-31 13F MASTEC COM 576323109 3,474,744 919,570 35.99 263,108 43.07 0.1012
2023-11-14 2023-09-30 13F MASTEC COM 576323109 2,555,174 827,401 47.89 183,896 -9.78 0.0782
2023-08-15 2023-06-30 13F MASTEC COM 576323109 1,727,773 1,600,863 1,261.42 203,825 1,600.67 0.0832
2023-05-15 2023-03-31 13F MASTEC COM 576323109 126,910 -1,093 -0.85 11,985 9.73 0.0051
2023-02-15 2022-12-31 13F MASTEC COM 576323109 128,003 2,813 2.25 10,922 37.38 0.0049
2022-11-15 2022-09-30 13F MASTEC COM 576323109 125,190 -1,045 -0.83 7,950 -12.12 0.0038
2022-08-15 2022-06-30 13F MASTEC COM 576323109 126,235 -39,547 -23.85 9,046 -37.35 0.0041
2022-05-13 2022-03-31 13F MASTEC COM 576323109 165,782 39,531 31.31 14,440 23.95 0.0056
2022-02-14 2021-12-31 13F MASTEC COM 576323109 126,251 -4,475 -3.42 11,650 3.29 0.0041
2021-11-10 2021-09-30 13F MASTEC COM 576323109 130,726 -6,373 -4.65 11,279 -22.46 0.0044
2021-07-30 2021-06-30 13F MASTEC COM 576323109 137,099 -71,062 -34.14 14,546 -25.42 0.0058
2021-05-06 2021-03-31 13F MASTEC COM 576323109 208,161 -10,967 -5.00 19,505 30.56 0.0086
2021-02-08 2020-12-31 13F MASTEC COM 576323109 219,128 9,593 4.58 14,940 68.97 0.0071
2020-11-12 2020-09-30 13F MASTEC COM 576323109 209,535 -21,475 -9.30 8,842 -14.69 0.0048
2020-08-13 2020-06-30 13F MASTEC COM 576323109 231,010 -15,522 -6.30 10,365 28.45 0.0061
2020-05-14 2020-03-31 13F MASTEC COM 576323109 246,532 8,030 3.37 8,069 -47.27 0.0058
2020-02-18 2019-12-31 13F MASTEC COM 576323109 238,502 7,780 3.37 15,302 2.14 0.0087
2019-11-14 2019-09-30 13F MASTEC COM 576323109 230,722 3,947 1.74 14,981 28.20 0.0093
2019-08-14 2019-06-30 13F MASTEC COM 576323109 226,775 -1,512 -0.66 11,686 6.42 0.0073
2019-05-14 2019-03-31 13F MASTEC COM 576323109 228,287 25,620 12.64 10,981 33.59 0.0071
2019-02-13 2018-12-31 13F MASTEC COM 576323109 202,667 75,381 59.22 8,220 44.64 0.0061
2018-11-08 2018-09-30 13F MASTEC COM 576323109 127,286 26,120 25.82 5,683 10.69 0.0037
2018-08-13 2018-06-30 13F MASTEC COM 576323109 101,166 0 0.00 5,134 7.86 0.0036
2018-05-14 2018-03-31 13F MASTEC COM 576323109 101,166 -900 -0.88 4,760 -4.72 0.0034
2018-02-13 2017-12-31 13F MASTEC COM 576323109 102,066 -69,250 -40.42 4,996 -37.15 0.0036
2017-11-13 2017-09-30 13F MASTEC COM 576323109 171,316 -33,080 -16.18 7,949 -13.86 0.0060
2017-08-10 2017-06-30 13F MASTEC COM 576323109 204,396 104,530 104.67 9,228 130.70 0.0071
2017-05-11 2017-03-31 13F MASTEC COM 576323109 99,866 -9,700 -8.85 4,000 -4.56 0.0032
2017-02-13 2016-12-31 13F MASTEC COM 576323109 109,566 0 0.00 4,191 28.64 0.0035
2016-11-10 2016-09-30 13F MASTEC COM 576323109 109,566 0 0.00 3,258 33.20 0.0027
2016-08-11 2016-06-30 13F MASTEC COM 576323109 109,566 21,000 23.71 2,446 36.42 0.0021
2016-05-13 2016-03-31 13F MASTEC COM 576323109 88,566 0 0.00 1,793 16.50 0.0015
2016-02-16 2015-12-31 13F/A-1 MASTEC COM 576323109 88,566 -6,870 -7.20 1,539 1.85 0.0013
2016-02-12 2015-12-31 13F MASTEC COM 576323109 88,566 1,402
2015-11-13 2015-09-30 13F MASTEC COM 576323109 95,436 -15,580 -14.03 1,511 -31.50 0.0013
2015-08-14 2015-06-30 13F MASTEC COM 576323109 111,016 -11,700 -9.53 2,206 -6.84 0.0018
2015-05-13 2015-03-31 13F MASTEC COM 576323109 122,716 0 0.00 2,368 -14.67 0.0019
2015-02-13 2014-12-31 13F MASTEC COM 576323109 122,716 0 0.00 2,775 -26.16 0.0023
2014-11-13 2014-09-30 13F MASTEC COM 576323109 122,716 0 0.00 3,758 -0.63 0.0032
2014-08-13 2014-06-30 13F MASTEC COM 576323109 122,716 0 0.00 3,782 -29.06 0.0032
2014-05-13 2014-03-31 13F MASTEC COM 576323109 122,716 3,009 2.51 5,331 36.10 0.0046
2014-02-13 2013-12-31 13F MASTEC COM 576323109 119,707 -3,333 -2.71 3,917 5.07 0.0035
2013-11-14 2013-09-30 13F MASTEC COM 576323109 123,040 722 0.59 3,728 -7.36 0.0037
2013-08-13 2013-06-30 13F MASTEC COM 576323109 122,318 122,318 4,024 0.0043
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.