广达服务美股招股说明书(2026-08-03版)

Quanta Services, Inc. $% Senior Notes due$% Senior Notes due$% Senior Notes due We are offering $aggregate principal amount of our% Senior Notes due(the “notes”), $aggregate principal amount of our% Senior Notes due(the “notes”) and $aggregate principalamount of our% Senior Notes due(the “notes” and, together with thenotes and thenotes, the “notes”). Thenotes will mature on, thenotes will mature onand thenotes will mature on. We will pay interest on thenotes semi-annually in arrears onandof eachyear, commencing, 2027. We will pay interest on thenotes semi-annually in arrears onandofeach year, commencing, 2027. We will pay interest on thenotes semi-annually in arrears onandof each year, commencing, 2027. The notes will be our senior unsecured obligations and will rank equally in right of payment with our existing and future seniorunsecured indebtedness. The notes will be effectively junior to our existing and future secured indebtedness to the extent of the value ofthe assets securing such indebtedness. The notes will not be guaranteed by any of our subsidiaries and will therefore be structurallysubordinated to all of the existing and future indebtedness and other liabilities of our subsidiaries, including trade payables. We may redeem all or a portion of the notes at our option at any time or from time to time at the applicable redemption price in thecircumstances described in this prospectus supplement. See “Description of Notes—Optional Redemption.” We will be required to offer to purchase the notes upon the occurrence of a “Change of Control Triggering Event” (as defined herein) ata price equal to 101% of the principal amount of the notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding,the date of purchase. See “Description of Notes—Purchase upon a Change of Control Triggering Event.” Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of thesesecurities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Anyrepresentation to the contrary is a criminal offense. This preliminary prospectus supplement and the accompanying prospectus relate to an effective registration statement under the Securities Act of 1933, asamended, but are not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell thesesecurities and are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.(1)Plus accrued interest, if any, from, 2026, if settlement occurs after that date. The notes are new issues of securities with no established trading market. We do not intend to apply for listing of the notes on anysecurities exchange or for inclusion of the notes on any automated dealer quotation system. We expect that delivery of the notes, inbook-entry form only through the facilities of The Depository Trust Company for the accounts of its participants, including EuroclearBank SA/NV, as operator of the Euroclear System, and Clearstream Banking, S.A., will be made on or about, 2026. Joint Book-Running Managers BofASecurities PNCCapitalMarketsLLC Table of Contents Neither we nor the underwriters have authorized anyone to provide you with any information other than the information contained in, orincorporated by reference in, this prospectus supplement, the accompanying base prospectus and any free writing prospectus prepared by or onbehalf of us. We and the underwriters take no responsibility for, and can provide no assurance as to the reliability of, any other informationthat others may give you. This prospectus supplement may be used only for the purpose for which it has been prepared. We are not, and the underwriters are not, making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. Youshould not assume that the information appearing in this prospectus supplement, the accompanying prospectus or any document incorporatedby reference is accurate as of any date other than the date of the applicable document. Our business, financial condition, results of operationsand prospects may have changed since the relevant date. Neither this prospectus supplement nor the accompanying prospectus constitutes anoffer or an invitation on our behalf or on behalf of the underwriters to subscribe for or purchase any of the securities, and may not be used foror in connection with an offer or solicitation by anyone, in any jurisdiction in which such an offer or solicitation is not authorized or to anyperson to whom it is unlawful to make such an offer or solicitation. We expect that delivery of the notes will be made to investors on or about, 2026, which will be the third business day following the date ofthis prospectus supplement (such settlement being referred to as “T+3”). Under Rule 15c6-1 under the Securities Exchange Act of 1934, as amended