콴타 서비스, Inc.
MX ˙ BMV ˙ US74762E1029
SecurityMX:PWR / Quanta Services, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership16,609 shares
Latest Disclosed Value $ 9,121,706
Janus Henderson Group Plc reports 2.92% decrease in ownership of PWR / Quanta Services, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 16,609 shares of Quanta Services, Inc. (MX:PWR) valued at $9,121,706 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 17,109 shares of Quanta Services, Inc.. This represents a change in shares of -2.92% 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)
2026-05-18 2026-03-31 13F/A-1 QUANTA SVCS COM 74762E102 16,609 -500 -2.92 9,122 26.35 0.0044
2026-05-15 2026-03-31 13F QUANTA SVCS COM 74762E102 16,609 -500 9,122 0.0017
2026-02-17 2025-12-31 13F QUANTA SVCS COM 74762E102 17,109 422 2.53 7,219 4.38 0.0032
2025-11-14 2025-09-30 13F QUANTA SVCS COM 74762E102 16,687 878 5.55 6,917 15.77 0.0032
2025-08-14 2025-06-30 13F QUANTA SVCS COM 74762E102 15,809 -524 -3.21 5,975 43.99 0.0029
2025-05-15 2025-03-31 13F QUANTA SVCS COM 74762E102 16,333 -526 -3.12 4,149 -22.19 0.0023
2025-02-14 2024-12-31 13F QUANTA SVCS COM 74762E102 16,859 -362 -2.10 5,333 3.88 0.0027
2024-11-14 2024-09-30 13F QUANTA SVCS COM 74762E102 17,221 800 4.87 5,134 23.06 0.0026
2024-08-14 2024-06-30 13F QUANTA SVCS COM 74762E102 16,421 -4,644 -22.05 4,171 -23.73 0.0022
2024-05-15 2024-03-31 13F QUANTA SVCS COM 74762E102 21,065 201 0.96 5,469 21.45 0.0030
2024-02-14 2023-12-31 13F QUANTA SVCS COM 74762E102 20,864 -112 -0.53 4,504 14.76 0.0027
2023-11-14 2023-09-30 13F QUANTA SVCS COM 74762E102 20,976 1,798 9.38 3,925 4.20 0.0026
2023-08-14 2023-06-30 13F QUANTA SVCS COM 74762E102 19,178 1,238 6.90 3,767 26.04 0.0023
2023-05-15 2023-03-31 13F QUANTA SVCS COM 74762E102 17,940 3,855 27.37 2,989 48.88 0.0020
2023-02-14 2022-12-31 13F QUANTA SVCS COM 74762E102 14,085 -1 -0.01 2,007 11.69 0.0014
2023-01-13 2022-09-30 13F/A-1 QUANTA SVCS COM 74762E102 14,086 4,355 44.75 1,797 47.42 0.0013
2022-11-14 2022-09-30 13F QUANTA SVCS COM 74762E102 14,086 4,355 1,797 0.0013
2022-08-15 2022-06-30 13F QUANTA SVCS COM 74762E102 9,731 -17,515 -64.28 1,219 -66.02 0.0008
2022-05-16 2022-03-31 13F QUANTA SVCS COM 74762E102 27,246 26 0.10 3,587 14.93 0.0017
2022-02-14 2021-12-31 13F QUANTA SVCS COM 74762E102 27,220 13,692 101.21 3,121 102.53 0.0013
2021-11-16 2021-09-30 13F QUANTA SVCS COM 74762E102 13,528 13,528 1,541 0.0007
2021-08-16 2021-06-30 13F QUANTA SVCS COM 74762E102 0 -51,496 -100.00 0 -100.00
2021-05-17 2021-03-31 13F QUANTA SVCS COM 74762E102 51,496 -31,143 -37.69 4,531 -23.87 0.0021
2021-02-16 2020-12-31 13F QUANTA SVCS COM 74762E102 82,639 82,639 5,952 0.0028
2020-02-15 2019-12-31 13F QUANTA SVCS COM 74762E102 0 -116,283 -100.00 0 -100.00
2019-11-14 2019-09-30 13F QUANTA SVCS COM 74762E102 116,283 -54,019 -31.72 4,395 -32.43 0.0024
2019-07-31 2019-06-30 13F QUANTA SVCS COM 74762E102 170,302 114,451 204.92 6,504 208.54 0.0035
2019-04-30 2019-03-31 13F QUANTA SVCS COM 74762E102 55,851 55,851 2,108 0.0012
2018-08-10 2018-06-30 13F QUANTA SVCS COM 74762E102 0 -21,542 -100.00 0 -100.00
2018-05-14 2018-03-31 13F QUANTA SVCS COM 74762E102 21,542 6,534 43.54 740 26.06 0.0004
2018-03-12 2017-12-31 13F/A-1 QUANTA SVCS COM 74762E102 15,008 -289,122 -95.07 587 -94.84 0.0004
2018-02-09 2017-12-31 13F QUANTA SVCS COM 74762E102 15,008 -289,122 587
2017-11-14 2017-09-30 13F QUANTA SVCS COM 74762E102 304,130 -816,206 -72.85 11,365 -69.18 0.0073
2017-08-17 2017-06-30 13F/A-1 QUANTA SVCS COM 74762E102 1,120,336 1,120,336 36,881 0.0251
2017-08-14 2017-06-30 13F QUANTA SVCS COM 74762E102 1,120,336 1,120,336 36,881
2016-07-29 2016-06-30 13F QUANTA SVCS COM 74762E102 0 -17,089 -100.00 0 -100.00
2016-05-12 2016-03-31 13F QUANTA SVCS COM 74762E102 17,089 -419,169 -96.08 386 -95.63 0.0031
2016-02-03 2015-12-31 13F QUANTA SVCS COM 74762E102 436,258 10,066 2.36 8,836 -14.35 0.0709
2015-11-16 2015-09-30 13F QUANTA SVCS COM 74762E102 426,192 0 0.00 10,316 -16.00 0.0909
2015-08-17 2015-06-30 13F QUANTA SVCS COM 74762E102 426,192 4,303 1.02 12,281 2.07 0.0965
2015-06-02 2015-03-31 13F/A-1 QUANTA SVCS COM 74762E102 421,889 3,767 0.90 12,032 1.38 0.0928
2015-05-15 2015-03-31 13F QUANTA SVCS COM 74762E102 421,889 12,032
2015-02-12 2014-12-31 13F QUANTA SVCS COM 74762E102 418,122 -5,196 -1.23 11,868 -22.75 0.0856
2014-11-12 2014-09-30 13F QUANTA SVCS COM 74762E102 423,318 1,696 0.40 15,364 5.39 0.1445
2014-08-13 2014-06-30 13F QUANTA SVCS COM 74762E102 421,622 0 0.00 14,578 -6.32 0.1361
2014-05-08 2014-03-31 13F QUANTA SVCS COM 74762E102 421,622 4,200 1.01 15,562 18.14 0.1515
2014-01-14 2013-12-31 13F QUANTA SVCS COM 74762E102 417,422 0 0.00 13,172 14.69 0.1331
2013-11-12 2013-09-30 13F QUANTA SVCS COM 74762E102 417,422 123,000 41.78 11,485 47.39 0.1267
2013-08-15 2013-06-30 13F QUANTA SVCS COM 74762E102 294,422 294,422 7,792 0.0911
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.