| Oct 13, 2021 | Blattner | Environmental engineering, consulting, and infrastructure services | $2,775 | On October 13, 2021, Quanta completed the acquisition of Blattner, a large and leading utility-scale renewable energy infrastructure solutions provider that is located in and pr... | 10-K† |
| Oct 13, 2021 | Blattner | Environmental engineering, consulting, and infrastructure services | $2,775 | On October 13, 2021, Quanta completed the acquisition of Blattner, a large and leading utility-scale renewable energy infrastructure solutions provider that is located in and pr... | 10-K† |
| Jul 17, 2024 | Cupertino Electric, Inc. | Environmental engineering, consulting, and infrastructure services | $2,040 | On July 17, 2024, Quanta completed the acquisition of Cupertino Electric, Inc. (CEI), which provides electrical infrastructure solutions, including engineering, procurement, pro... | 10-K† |
| Jul 17, 2024 | Cupertino Electric, Inc. | Environmental engineering, consulting, and infrastructure services | $2,035 | On July 17, 2024, Quanta completed the acquisition of Cupertino Electric, Inc. (CEI), which provides electrical infrastructure solutions, including engineering, procurement, pro... | 10-K† |
| Jul 25, 2025 | Dynamic Systems (DSI), LLC | Environmental engineering, consulting, and infrastructure services | $1,486 | On July 25, 2025, Quanta completed the acquisition of Dynamic Systems (DSI), LLC (Dynamic Systems), which provides turnkey mechanical, plumbing and process infrastructure soluti... | 10-K† |
| Dec 31, 2013 | Six 2013 Acquisitions | Environmental engineering, consulting, and infrastructure services | $430 | During 2013, Quanta acquired six businesses, which enabled Quanta to further enhance its electric power infrastructure and oil and gas infrastructure service offerings in the Un... | 10-K† |
| Oct 1, 2009 | Price Gregory | Environmental engineering, consulting, and infrastructure services | $328 | On October 1, 2009, Quanta acquired Price Gregory in exchange for the issuance of approximately 10.9 million shares of Quanta common stock valued at approximately $231.8 million... | 10-K† |
| Dec 31, 2018 | 2018 Acquisitions | Environmental engineering, consulting, and infrastructure services | $146 | During the year ended December 31, 2018, Quanta acquired an electrical infrastructure services business specializing in substation construction and relay services, a postseconda... | 10-K† |