MINE SAFETY DISCLOSURES
This exhibit contains certain specified disclosures regarding mine safety required by section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K. Quanta Services, Inc. (together with its subsidiaries, “Quanta”) does not act as the owner of a coal or other mine, but may act as an “operator” as defined under the Federal Mine Safety and Health Act of 1977 where Quanta performs services or construction as an independent contractor at a coal or other mine.
The table below reflects citations, orders, violations and proposed assessments issued by the Mine Safety and Health Administration (the “MSHA”) to Quanta during the three months ended September 30, 2026, as well as legal actions before the Federal Mine Safety and Health Review Commission (the “FMSHRC”) pending as of September 30, 2026, which may relate to citations or orders issued in prior periods. Due to timing and other factors, the data may not agree with the mine data retrieval system maintained by the MSHA at www.MSHA.gov.
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Mine or Operating Name / MSHA Identification Number | Section 104(a) S&S Citations | Section 104(b) Orders | Section 104(d) Citations and Orders | Section 110(b)(2) Violations | Section 107(a) Orders | Total Dollar Value of MSHA Assessments Proposed | Total Number of Mining Related Fatalities | Received Notice of Pattern of Violations Under Section 104(e) (yes/no) |
Received Notice of Potential to Have Pattern Under Section 104(e) (yes/no) |
Legal Actions Pending as of Last Day of Period (2) | Legal Actions Initiated During Period (3) | Legal Actions Resolved During Period (4) |
WE SODA @ WESTVACO / 4800152 (1) | ─ | ─ | ─ | ─ | ─ | ─ | ─ | N | N | 1 | 1 | ─ |
| Jewett City / 0600393(1) | ─ | ─ | ─ | ─ | ─ | ─ | ─ | N | N | 1 | ─ | ─ |
(1)Denotes where Quanta is working as an “independent contractor” at another operator’s mine.
(2)This number reflects legal proceedings which remain pending before the FMSHRC as of September 30, 2026. The pending legal actions may relate to citations or orders issued by MSHA during the reporting period or to citations or orders issued in prior periods. The legal proceedings reflected in this column of the table are categorized as follows in accordance with the categories established in the Procedural Rules of the FMSHRC:
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| Mine or Operating Name / MSHA Identification Number | Contests of Citations and Orders | Contests of Proposed Penalties | Complaints for Compensation | Complaints of Discharge, Discrimination or Interference | Applications for Temporary Relief | Appeals of Judges' Decisions or Orders |
| WE SODA @ WESTVACO / 4800152 (1) | ─ | 1 | ─ | ─ | ─ | ─ |
| Jewett City / 0600393 (1) | 1 | 1 | ─ | ─ | ─ | ─ |
(3)This number reflects legal proceedings initiated before the FMSHRC during the period ended September 30, 2026. The number of “initiated legal actions” reported here may not have remained pending as of September 30, 2026.
(4)This number reflects legal proceedings before the FMSHRC that were resolved during the period ended September 30, 2026.