Vanguard Group Inc ownership in PWR / Quanta Services, Inc.

Quanta Services, Inc.

MX ˙ BMV ˙ US74762E1029

Security	MX:PWR / Quanta Services, Inc.
Institution	Vanguard Group Inc
Latest Disclosed Ownership	18,143,230 shares
Ownership	12.17%

2025-10-30 - Vanguard Group Inc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 18,143,230 shares of Quanta Services, Inc. (MX:PWR). This represents 12.17 percent ownership of the company. In their previous filing dated 2024-02-13 , Vanguard Group Inc had reported owning 16,235,344 shares, indicating an increase of 11.75 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2025-10-30	2025-10-30	13G/A	16,235,344	18,143,230	11.75	12.17	8.95
2024-02-13	2024-02-13	13G/A	15,721,218	16,235,344	3.27	11.17	1.55
2023-02-09	2023-02-09	13G/A	15,181,219	15,721,218	3.56	11.00	3.29
2022-02-10	2022-02-10	13G/A	14,459,727	15,181,219	4.99	10.65	2.31
2021-02-10	2021-02-10	13G/A	15,172,768	14,459,727	-4.70	10.41	-2.35
2020-02-12	2020-02-12	13G/A	15,454,366	15,172,768	-1.82	10.66	0.76
2019-02-12	2019-02-12	13G/A	15,393,604	15,454,366	0.39	10.58	5.69
2018-04-10	2018-04-10	13G/A	15,172,568	15,393,604	1.46	10.01	2.14
2018-02-12	2018-02-12	13G/A	13,598,712	15,172,568	11.57	9.80	4.37
2017-02-13	2017-02-13	13G/A	13,598,712	13,598,712	0.00	9.39	0.00
2017-02-11	2017-02-11	13G/A	13,541,349	13,598,712	0.42	9.39	6.10
2016-02-10	2016-02-10	13G/A	15,525,461	13,541,349	-12.78	8.85	-12.81
2015-12-10	2015-12-10	13G/A		15,525,461		10.15
2015-02-10	2015-02-10	13G/A		15,961,026		7.51
2014-02-12	2014-02-12	13G/A		14,281,982		6.72
2013-02-11	2013-02-11	13G/A		12,223,040		5.53
2012-02-10	2012-02-10	13G/A		10,878,942		5.27

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-01-29	2025-12-31	13F	QUANTA SVCS	COM	74762E102	18,084,991	-58,628	-0.32	7,632,951	1.51	0.1107
2025-11-07	2025-09-30	13F	QUANTA SVCS	COM	74762E102	18,143,619	386,937	2.18	7,519,079	12.00	0.1126
2025-08-11	2025-06-30	13F	QUANTA SVCS	COM	74762E102	17,756,682	339,383	1.95	6,713,446	51.64	0.1087
2025-05-09	2025-03-31	13F	QUANTA SVCS	COM	74762E102	17,417,299	407,878	2.40	4,427,129	-17.65	0.0800
2025-02-11	2024-12-31	13F	QUANTA SVCS	COM	74762E102	17,009,421	161,277	0.96	5,375,828	7.02	0.0936
2024-11-13	2024-09-30	13F	QUANTA SVCS	COM	74762E102	16,848,144	194,973	1.17	5,023,274	18.71	0.0900
2024-08-13	2024-06-30	13F	QUANTA SVCS	COM	74762E102	16,653,171	311,941	1.91	4,231,404	-0.33	0.0813
2024-05-10	2024-03-31	13F	QUANTA SVCS	COM	74762E102	16,341,230	105,355	0.65	4,245,452	21.17	0.0841
2024-03-11	2023-12-31	13F/A-1	QUANTA SVCS	COM	74762E102	16,235,875	191,334	1.19	3,503,702	16.73	0.0765
2024-02-14	2023-12-31	13F	QUANTA SVCS	COM	74762E102	16,235,344	190,803		3,503,587		0.0665
2023-12-18	2023-09-30	13F/A-1	QUANTA SVCS	COM	74762E102	16,044,541	-45,267	-0.28	3,001,452	-5.04	0.0737
2023-11-14	2023-09-30	13F	QUANTA SVCS	COM	74762E102	16,044,541	-45,267		3,001,452		0.0133
2023-08-14	2023-06-30	13F	QUANTA SVCS	COM	74762E102	16,089,808	200,437	1.26	3,160,843	19.38	0.0749
2023-07-14	2023-03-31	13F/A-1	QUANTA SVCS	COM	74762E102	15,889,371	168,153	1.07	2,647,805	18.19	0.0674
2023-05-15	2023-03-31	13F	QUANTA SVCS	COM	74762E102	15,888,759	167,541		2,647,703		0.0674
2023-02-10	2022-12-31	13F	QUANTA SVCS	COM	74762E102	15,721,218	44,468	0.28	2,240,274	12.18	0.0610
2022-11-14	2022-09-30	13F	QUANTA SVCS	COM	74762E102	15,676,750	6,515	0.04	1,997,061	1.68	0.0587
2022-08-12	2022-06-30	13F	QUANTA SVCS	COM	74762E102	15,670,235	306,924	2.00	1,964,108	-2.86	0.0552
2022-05-13	2022-03-31	13F	QUANTA SVCS	COM	74762E102	15,363,311	182,092	1.20	2,021,965	16.16	0.0478
2022-02-14	2021-12-31	13F	QUANTA SVCS	COM	74762E102	15,181,219	443,247	3.01	1,740,677	3.77	0.0395
2021-11-12	2021-09-30	13F	QUANTA SVCS	COM	74762E102	14,737,972	-28,799	-0.20	1,677,475	25.43	0.0417
2021-08-13	2021-06-30	13F	QUANTA SVCS	COM	74762E102	14,766,771	92,565	0.63	1,337,426	3.59	0.0333
2021-05-14	2021-03-31	13F	QUANTA SVCS	COM	74762E102	14,674,206	214,479	1.48	1,291,036	23.97	0.0349
2021-02-12	2020-12-31	13F	QUANTA SVCS	COM	74762E102	14,459,727	40,817	0.28	1,041,390	36.63	0.0302
2020-11-16	2020-09-30	13F	QUANTA SVCS	COM	74762E102	14,418,910	-305,074	-2.07	762,183	31.95	0.0252
2020-08-14	2020-06-30	13F	QUANTA SVCS	COM	74762E102	14,723,984	-889,261	-5.70	577,623	16.60	0.0205
2020-05-15	2020-03-31	13F	QUANTA SVCS	COM	74762E102	15,613,245	440,477	2.90	495,408	-19.80	0.0211
2020-02-14	2019-12-31	13F	QUANTA SVCS	COM	74762E102	15,172,768	114,547	0.76	617,684	8.52	0.0211
2019-11-14	2019-09-30	13F	QUANTA SVCS	COM	74762E102	15,058,221	-147,549	-0.97	569,201	-1.98	0.0211
2019-08-14	2019-06-30	13F	QUANTA SVCS	COM	74762E102	15,205,770	-246,780	-1.60	580,709	-0.42	0.0218
2019-05-15	2019-03-31	13F	QUANTA SVCS	COM	74762E102	15,452,550	-1,816	-0.01	583,179	25.37	0.0229
2019-02-14	2018-12-31	13F	QUANTA SVCS	COM	74762E102	15,454,366	-17,894	-0.12	465,176	-9.93	0.0209
2018-12-13	2018-09-30	13F/A-2	QUANTA SVCS	COM	74762E102	15,472,260	139,596	0.91	516,464	0.85	0.0202
2018-11-23	2018-09-30	13F/A-1	QUANTA SVCS	COM	74762E102	15,472,260	0		516,464		0.0202
2018-11-14	2018-09-30	13F	QUANTA SVCS	COM	74762E102	15,472,260	139,596		516,464
2018-08-14	2018-06-30	13F	QUANTA SVCS	COM	74762E102	15,332,664	-60,940	-0.40	512,111	-3.15	0.0214
2018-05-15	2018-03-31	13F	QUANTA SVCS	COM	74762E102	15,393,604	221,036	1.46	528,771	-10.89	0.0231
2018-02-14	2017-12-31	13F	QUANTA SVCS	COM	74762E102	15,172,568	508,448	3.47	593,400	8.29	0.0259
2017-11-14	2017-09-30	13F	QUANTA SVCS	COM	74762E102	14,664,120	-68,482	-0.46	547,998	12.99	0.0256
2017-08-24	2017-06-30	13F/A-1	QUANTA SVCS	COM	74762E102	14,732,602	511,917	3.60	484,998	-8.10	0.0239
2017-08-11	2017-06-30	13F	QUANTA SVCS	COM	74762E102	14,732,602	511,917		484,998
2017-05-12	2017-03-31	13F	QUANTA SVCS	COM	74762E102	14,220,685	621,973	4.57	527,729	11.36	0.0271
2017-02-14	2016-12-31	13F	QUANTA SVCS	COM	74762E102	13,598,712	-701,996	-4.91	473,915	18.40	0.0264
2016-11-14	2016-09-30	13F	QUANTA SVCS	COM	74762E102	14,300,708	251,922	1.79	400,277	23.23	0.0235
2016-08-10	2016-06-30	13F	QUANTA SVCS	COM	74762E102	14,048,786	-500,300	-3.44	324,808	-1.04	0.0202
2016-05-13	2016-03-31	13F	QUANTA SVCS	COM	74762E102	14,549,086	1,007,737	7.44	328,228	19.70	0.0213
2016-02-08	2015-12-31	13F	QUANTA SVCS	COM	74762E102	13,541,349	-2,892,669	-17.60	274,213	-31.08	0.0184
2015-11-12	2015-09-30	13F/A-1	QUANTA SVCS	COM	74762E102	16,434,018	-276,475	-1.65	397,868	-17.39	0.0169
2015-11-12	2015-09-30	13F/A-1	QUANTA SVCS	COM	74762E102	16,434,018	-276,475		397,868		0.0169
2015-08-13	2015-06-30	13F	QUANTA SVCS	COM	74762E102	16,710,493	131,406	0.79	481,597	1.82	0.0326
2015-05-15	2015-03-31	13F/A-1	QUANTA SVCS	COM	74762E102	16,579,087	618,061	3.87	473,001	4.38	0.0321
2015-05-14	2015-03-31	13F	QUANTA SVCS	COM	74762E102	16,579,087			473,001
2015-02-12	2014-12-31	13F	QUANTA SVCS	COM	74762E102	15,961,026	573,817	3.73	453,135	-18.85	0.0326
2014-11-12	2014-09-30	13F	QUANTA SVCS	COM	74762E102	15,387,209	283,805	1.88	558,402	6.92	0.0435
2014-08-11	2014-06-30	13F	QUANTA SVCS	COM	74762E102	15,103,404	300,172	2.03	522,275	-4.39	0.0411
2014-05-13	2014-03-31	13F	QUANTA SVCS	COM	74762E102	14,803,232	521,250	3.65	546,239	21.19	0.0459
2014-02-12	2013-12-31	13F	QUANTA SVCS	COM	74762E102	14,281,982	385,413	2.77	450,739	17.90	0.0396
2013-11-07	2013-09-30	13F	QUANTA SVCS	COM	74762E102	13,896,569	318,344	2.34	382,295	6.41	0.0373
2013-08-13	2013-06-30	13F	QUANTA SVCS	COM	74762E102	13,578,225	13,578,225		359,280		0.0377

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.