Quanta Services, Inc.
MX ˙ BMV ˙ US74762E1029
SecurityMX:PWR / Quanta Services, Inc.
InstitutionBlair William & Co/il
Latest Disclosed Ownership225,850 shares
Latest Disclosed Value $ 123,996,141
Blair William & Co/il reports 181.25% increase in ownership of PWR / Quanta Services, Inc.

On May 8, 2026 - Blair William & Co/il filed a 13F-HR form disclosing ownership of 225,850 shares of Quanta Services, Inc. (MX:PWR) valued at $123,996,141 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 80,301 shares of Quanta Services, Inc.. This represents a change in shares of 181.25% during the quarter.

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)
2026-05-08 2026-03-31 13F QUANTA SVCS COM 74762E102 225,850 145,549 181.25 123,996 265.87 0.3553
2026-02-17 2025-12-31 13F QUANTA SVCS COM 74762E102 80,301 40,956 104.09 33,892 107.86 0.0910
2025-11-12 2025-09-30 13F QUANTA SVCS COM 74762E102 39,345 2,210 5.95 16,305 16.14 0.0434
2025-07-24 2025-06-30 13F QUANTA SVCS COM 74762E102 37,135 1,291 3.60 14,040 54.11 0.0390
2025-05-09 2025-03-31 13F QUANTA SVCS COM 74762E102 35,844 -487 -1.34 9,111 -20.66 0.0275
2025-02-12 2024-12-31 13F QUANTA SVCS COM 74762E102 36,331 9,859 37.24 11,482 45.49 0.0334
2024-11-12 2024-09-30 13F QUANTA SVCS COM 74762E102 26,472 1,270 5.04 7,893 23.25 0.0232
2024-08-12 2024-06-30 13F QUANTA SVCS COM 74762E102 25,202 2,111 9.14 6,403 6.75 0.0198
2024-05-09 2024-03-31 13F QUANTA SVCS COM 74762E102 23,091 665 2.97 5,999 23.95 0.0188
2024-02-12 2023-12-31 13F QUANTA SVCS COM 74762E102 22,426 1,640 7.89 4,840 24.46 0.0165
2023-11-09 2023-09-30 13F QUANTA SVCS COM 74762E102 20,786 2,012 10.72 3,888 5.42 0.0149
2023-08-11 2023-06-30 13F QUANTA SVCS COM 74762E102 18,774 3,456 22.56 3,688 44.51 0.0135
2023-05-12 2023-03-31 13F QUANTA SVCS COM 74762E102 15,318 -2,286 -12.99 2,553 1.75 0.0102
2023-02-10 2022-12-31 13F QUANTA SVCS COM 74762E102 17,604 1,517 9.43 2,509 22.40 0.0109
2022-11-09 2022-09-30 13F QUANTA SVCS COM 74762E102 16,087 -1,074 -6.26 2,049 -4.74 0.0094
2022-08-10 2022-06-30 13F QUANTA SVCS COM 74762E102 17,161 1,005 6.22 2,151 1.18 0.0095
2022-05-13 2022-03-31 13F QUANTA SVCS COM 74762E102 16,156 2,884 21.73 2,126 39.68 0.0075
2022-02-14 2021-12-31 13F QUANTA SVCS COM 74762E102 13,272 831 6.68 1,522 7.49 0.0048
2021-11-12 2021-09-30 13F QUANTA SVCS COM 74762E102 12,441 737 6.30 1,416 33.58 0.0048
2021-08-12 2021-06-30 13F QUANTA SVCS COM 74762E102 11,704 -4,017 -25.55 1,060 -23.36 0.0037
2021-05-13 2021-03-31 13F QUANTA SVCS COM 74762E102 15,721 2,037 14.89 1,383 40.41 0.0052
2021-02-09 2020-12-31 13F QUANTA SVCS COM 74762E102 13,684 -2,825 -17.11 985 12.83 0.0036
2020-11-06 2020-09-30 13F QUANTA SVCS COM 74762E102 16,509 -3,753 -18.52 873 9.81 0.0037
2020-08-12 2020-06-30 13F QUANTA SVCS COM 74762E102 20,262 -1,873 -8.46 795 13.25 0.0038
2020-05-11 2020-03-31 13F QUANTA SVCS COM 74762E102 22,135 -3,375 -13.23 702 -32.44 0.0044
2020-02-13 2019-12-31 13F QUANTA SVCS COM 74762E102 25,510 2,791 12.28 1,039 20.95 0.0053
2019-11-12 2019-09-30 13F QUANTA SVCS COM 74762E102 22,719 1,457 6.85 859 3.25 0.0049
2019-08-13 2019-06-30 13F QUANTA SVCS COM 74762E102 21,262 -1,029 -4.62 832 -1.07 0.0048
2019-05-14 2019-03-31 13F QUANTA SVCS COM 74762E102 22,291 1,501 7.22 841 34.35 0.0051
2019-02-14 2018-12-31 13F QUANTA SVCS COM 74762E102 20,790 2,415 13.14 626 2.12 0.0046
2018-11-13 2018-09-30 13F QUANTA SVCS COM 74762E102 18,375 -515 -2.73 613 -2.85 0.0038
2018-08-13 2018-06-30 13F QUANTA SVCS COM 74762E102 18,890 0 0.00 631 -2.77 0.0043
2018-05-15 2018-03-31 13F QUANTA SVCS COM 74762E102 18,890 5,150 37.48 649 20.86 0.0046
2018-02-14 2017-12-31 13F QUANTA SVCS COM 74762E102 13,740 0 0.00 537 4.68 0.0036
2017-11-13 2017-09-30 13F QUANTA SERVICES COM 74762E102 13,740 1,655 13.69 513 28.89 0.0038
2017-08-04 2017-06-30 13F QUANTA SERVICES COM 74762E102 12,085 -100 -0.82 398 -12.33 0.0030
2017-05-10 2017-03-31 13F QUANTA SERVICES COM 74762E102 12,185 12,185 454 0.0037
2017-02-14 2016-12-31 13F QUANTA SERVICES COM 74762E102 0 -17,200 -100.00 0 -100.00
2016-11-14 2016-09-30 13F QUANTA SERVICES COM 74762E102 17,200 0 0.00 481 20.85 0.0043
2016-08-08 2016-06-30 13F Quanta Services COM 74762E102 17,200 17,200 398 0.0037
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.