Quanta Services, Inc.
MX ˙ BMV ˙ US74762E1029
SecurityMX:PWR / Quanta Services, Inc.
InstitutionLaffer Investments
Latest Disclosed Ownership23,946 shares
Latest Disclosed Value $ 13,146,833
Laffer Investments reports 1.37% increase in ownership of PWR / Quanta Services, Inc.

On May 13, 2026 - Laffer Investments filed a 13F-HR form disclosing ownership of 23,946 shares of Quanta Services, Inc. (MX:PWR) valued at $13,146,833 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 23,622 shares of Quanta Services, Inc.. This represents a change in shares of 1.37% 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)
2026-05-13 2026-03-31 13F QUANTA SVCS COM 74762E102 23,946 324 1.37 13,147 31.87 1.9412
2026-02-12 2025-12-31 13F QUANTA SVCS COM 74762E102 23,622 -430 -1.79 9,970 0.02 1.5151
2025-11-12 2025-09-30 13F QUANTA SVCS COM 74762E102 24,052 4,776 24.78 9,968 36.78 1.5784
2025-08-07 2025-06-30 13F QUANTA SVCS COM 74762E102 19,276 6,507 50.96 7,288 124.56 1.2988
2025-05-14 2025-03-31 13F QUANTA SVCS COM 74762E102 12,769 -808 -5.95 3,246 -24.38 0.6910
2025-02-06 2024-12-31 13F QUANTA SVCS COM 74762E102 13,577 1,791 15.20 4,291 22.15 0.8437
2024-11-04 2024-09-30 13F QUANTA SVCS COM 74762E102 11,786 3,874 48.96 3,514 74.78 0.7116
2024-08-14 2024-06-30 13F QUANTA SERVICES COMMON STOCKS 74762E102 7,912 6,889 673.41 2,010 658.49 0.4333
2024-05-15 2024-03-31 13F QUANTA SERVICES COMMON STOCKS 74762E102 1,023 -1,071 -51.15 266 -41.24 0.0686
2024-02-08 2023-12-31 13F QUANTA SERVICES COMMON STOCKS 74762E102 2,094 181 9.46 452 26.33 0.1201
2023-11-14 2023-09-30 13F QUANTA SERVICES COMMON STOCKS 74762E102 1,913 233 13.87 358 8.18 0.1052
2023-08-14 2023-06-30 13F QUANTA SERVICES COMMON STOCKS 74762E102 1,680 226 15.54 330 36.36 0.0876
2023-05-09 2023-03-31 13F QUANTA SERVICES COMMON STOCKS 74762E102 1,454 267 22.49 242 43.20 0.0656
2023-02-10 2022-12-31 13F QUANTA SERVICES COMMON STOCKS 74762E102 1,187 316 36.28 169 53.64 0.0487
2022-11-10 2022-09-30 13F Quanta Services COMMON STOCKS 74762E102 871 55 6.74 111 7.84 0.0408
2022-08-15 2022-06-30 13F Quanta Services COMMON STOCKS 74762E102 816 74 9.97 102 5.15 0.0359
2022-05-13 2022-03-31 13F Quanta Services COMMON STOCKS 74762E102 742 -110 -12.91 98 0.00 0.0294
2022-02-11 2021-12-31 13F Quanta Services COMMON STOCKS 74762E102 852 852 98 0.0282
2016-08-15 2016-06-30 13F Quanta Services COMMON STOCKS 74762E102 0 -52,558 -100.00 0 -100.00
2016-05-17 2016-03-31 13F Quanta Services COMMON STOCKS 74762E102 52,558 1,186 11.37 0.3208
2016-02-16 2015-12-31 13F Quanta Services COMMON STOCKS 74762E102 1,064 -16.35 0.2876
2015-11-06 2015-09-30 13F Quanta Services COMMON STOCKS 74762E102 1,272 -15.98 0.3367
2015-08-14 2015-06-30 13F Quanta Services COMMON STOCKS 74762E102 52,558 52,558 1,515 0.3675
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.