Quanta Services, Inc.
MX ˙ BMV ˙ US74762E1029
SecurityMX:PWR / Quanta Services, Inc.
InstitutionCastleark Management Llc
Latest Disclosed Ownership1,380 shares
Latest Disclosed Value $ 757,648
Castleark Management Llc reports 79.34% decrease in ownership of PWR / Quanta Services, Inc.

On May 15, 2026 - Castleark Management Llc filed a 13F-HR form disclosing ownership of 1,380 shares of Quanta Services, Inc. (MX:PWR) valued at $757,648 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 6,680 shares of Quanta Services, Inc.. This represents a change in shares of -79.34% 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)
2026-05-15 2026-03-31 13F QUANTA SVCS COM 74762E102 1,380 -5,300 -79.34 758 -73.15 0.0251
2026-02-12 2025-12-31 13F QUANTA SVCS COM 74762E102 6,680 770 13.03 2,819 15.11 0.0828
2025-11-17 2025-09-30 13F QUANTA SVCS COM 74762E102 5,910 0 0.00 2,449 9.62 0.0687
2025-08-18 2025-06-30 13F QUANTA SVCS COM 74762E102 5,910 -40 -0.67 2,234 47.75 0.0672
2025-05-15 2025-03-31 13F QUANTA SVCS COM 74762E102 5,950 3,830 180.66 1,512 125.67 0.0524
2025-02-18 2024-12-31 13F QUANTA SVCS COM 74762E102 2,120 -680 -24.29 670 -19.66 0.0234
2024-11-15 2024-09-30 13F QUANTA SVCS COM 74762E102 2,800 -2,000 -41.67 835 -31.58 0.0340
2024-08-14 2024-06-30 13F QUANTA SVCS COM 74762E102 4,800 -1,360 -22.08 1,220 -23.81 0.0498
2024-05-16 2024-03-31 13F QUANTA SVCS COM 74762E102 6,160 770 14.29 1,600 37.58 0.0666
2024-02-15 2023-12-31 13F QUANTA SVCS COM 74762E102 5,390 -60 -1.10 1,163 14.13 0.0516
2023-11-15 2023-09-30 13F QUANTA SVCS COM 74762E102 5,450 -1,930 -26.15 1,020 -29.68 0.0519
2023-08-16 2023-06-30 13F QUANTA SVCS COM 74762E102 7,380 -780 -9.56 1,450 6.62 0.0657
2023-05-16 2023-03-31 13F QUANTA SVCS COM 74762E102 8,160 0 0.00 1,360 16.95 0.0668
2023-02-10 2022-12-31 13F QUANTA SVCS COM 74762E102 8,160 0 0.00 1,163 11.73 0.0607
2022-11-15 2022-09-30 13F QUANTA SVCS COM 74762E102 8,160 -340 -4.00 1,040 -2.35 0.0579
2022-08-16 2022-06-30 13F QUANTA SVCS COM 74762E102 8,500 -5,930 -41.09 1,065 -43.92 0.0570
2022-05-16 2022-03-31 13F QUANTA SVCS COM 74762E102 14,430 720 5.25 1,899 20.80 0.0820
2022-02-16 2021-12-31 13F QUANTA SVCS COM 74762E102 13,710 -1,870 -12.00 1,572 -11.34 0.0578
2021-11-12 2021-09-30 13F QUANTA SVCS COM 74762E102 15,580 15,580 1,773 0.0678
2020-11-14 2020-09-30 13F QUANTA SVCS COM 74762E102 0 -56,165 -100.00 0 -100.00
2020-08-14 2020-06-30 13F QUANTA SVCS COM 74762E102 56,165 -108,930 -65.98 2,203 -57.94 0.0958
2020-05-13 2020-03-31 13F QUANTA SVCS COM 74762E102 165,095 51,585 45.45 5,238 13.35 0.3102
2020-02-14 2019-12-31 13F QUANTA SVCS COM 74762E102 113,510 113,510 4,621 0.1849
2018-05-14 2018-03-31 13F QUANTA SVCS COM 74762E102 0 -411,740 -100.00 0 -100.00
2018-02-15 2017-12-31 13F QUANTA SVCS COM 74762E102 411,740 -1,710 -0.41 16,103 4.22 0.4835
2017-11-15 2017-09-30 13F QUANTA SVCS COM 74762E102 413,450 -31,050 -6.99 15,451 5.59 0.4850
2017-08-15 2017-06-30 13F QUANTA SVCS COM 74762E102 444,500 -16,080 -3.49 14,633 -14.39 0.4782
2017-05-15 2017-03-31 13F QUANTA SVCS COM 74762E102 460,580 -12,035 -2.55 17,092 3.77 0.5356
2017-02-15 2016-12-31 13F QUANTA SVCS COM 74762E102 472,615 92,840 24.45 16,471 54.95 0.5253
2016-11-15 2016-09-30 13F QUANTA SVCS COM 74762E102 379,775 379,775 0.00 10,630 0.3215
2015-02-10 2014-12-31 13F QUANTA SVCS COM 74762E102 0 0 0 0.0000
2014-11-17 2014-09-30 13F QUANTA SVCS COM 74762E102 0 0 0 0.0000
2014-08-15 2014-06-30 13F QUANTA SVCS COM 74762E102 0 0 0 0.0000
2014-05-20 2014-03-31 13F QUANTA SVCS COM 74762E102 0 0 0 0.0000
2014-02-20 2013-12-31 13F QUANTA SVCS COM 74762E102 0 -13,400 -100.00 0 -100.00
2014-11-21 2013-09-30 13F/A-1 QUANTA SVCS COM 74762E102 13,400 13,400 486 0.0137
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.