Item 5. Other Information.

Amendment to Credit Agreement

The information set forth below is included for the purpose of providing disclosure under “Item 1.01 Entry into a Material Definitive Agreement” and “Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.” of Form 8-K.

On July 29, 2026, Quanta entered into the Incremental Revolving Credit Increase Agreement, Consent to Extension of the Maturity Date, Lender Joinder Agreement and Fourteenth Amendment to Fourth Amended and Restated Credit Agreement (the Amendment) among Quanta, as a borrower and the guarantor, certain of Quanta’s subsidiaries, as borrowers, the lenders party thereto, and Bank of America, N.A., as Administrative Agent. The Amendment amended the Fourth Amended and Restated Credit Agreement, dated as of December 18, 2015, as amended. The Amendment, among other things, (i) increased the aggregate commitments for revolving loans under the senior credit facility from $2.80 billion to $2.98 billion and (ii) extended the maturity date for revolving loans under the senior credit facility from July 31, 2030 to July 31, 2031.

The foregoing description of the Amendment does not purport to be complete and is subject to, and qualified in its entirety by reference to, the full text of the Amendment, a copy of which is filed as Exhibit 10.2 to this Quarterly Report and is incorporated herein by reference.

Increase in Commercial Paper Program

The information set forth below is included for the purpose of providing disclosure under “Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.” of Form 8-K.

On July 29, 2026, Quanta increased the size of its existing unsecured commercial paper program, established on August 23, 2022 (the CP Program), to permit the issuance of short-term, unsecured commercial paper notes (the Notes) up to a maximum aggregate face amount of $2.98 billion outstanding at any time, effective August 8, 2026. Prior to the increase, the CP Program permitted Quanta to issue Notes in a maximum aggregate face amount of $2.80 billion outstanding at any time. Quanta intends to continue to utilize the availability under the CP Program for general corporate purposes. After this increase, the maximum aggregate face amount of the CP Program aligns with the aggregate commitments for revolving loans under Quanta’s senior credit facility, which must be maintained to provide credit support for all Notes issued under the CP Program.

The Notes are issued pursuant to the terms and conditions of the commercial paper dealer agreements (each, a Dealer Agreement) entered into between Quanta and each commercial paper dealer acting as a dealer under the CP Program (each, a Dealer). Quanta may engage additional commercial paper dealers from time to time to act as Dealers under the CP Program. A national bank acts as issuing and paying agent under the CP Program. Except for the increase in the size of the CP Program described above, the other terms and conditions of the CP Program remain as previously described in Quanta’s Current Report on Form 8-K filed with the Securities and Exchange Commission on August 24, 2022.

The Notes are issued pursuant to an exemption from registration contained in Section 4(a)(2) of the Securities Act, and have not been and will not be registered under the Securities Act or state securities laws and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act and applicable state securities laws. The information contained in this Quarterly Report is neither an offer to sell nor a solicitation of an offer to buy any securities.

From time to time, one or more of the Dealers and certain of their respective affiliates have provided, and may in the future provide, commercial banking, investment banking and other financial advisory services to Quanta and its affiliates for which they have received or will receive customary fees and expense reimbursements.

Insider Trading Arrangements

During the three months ended June 30, 2026, no director or officer of Quanta adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.