WEC ENERGY GROUP, INC.

Overview

WEC Energy Group, Inc. is a U.S. regulated energy holding company whose core businesses include electric generation, transmission and distribution, and natural-gas distribution, storage and transportation. Its operations are concentrated in the Midwest, including Wisconsin, Illinois, Michigan and Minnesota.[1]+2

The company’s reportable businesses include utility operations, electric transmission and non-utility energy infrastructure. WEC Energy Group reported about 4.7 million customers and 7,150 employees in 2025, and full-year consolidated revenue of $9.8 billion.[4]+3

The company describes its mission as delivering affordable, reliable and clean energy. WEC Energy Group was formed in 2015 through Wisconsin Energy’s acquisition of Integrys Energy.[6][7] [1]+6

Products & services

WEC Energy Group’s customer offerings include electricity, natural gas, and district steam. We Energies supplies steam to downtown Milwaukee customers for uses including space and water heating, sterilizing, laundering, and food processing; it serves about 300 district-energy customers. Natural-gas services include transporting gas for customers that purchase it from third-party suppliers, with optional balancing and pooling services.[8]+2

The company’s 2025 annual report lists 8,375 MW of generating capacity: 4,193 MW natural gas, 2,695 MW coal, 773 MW solar, 580 MW wind, and 134 MW hydro and biomass.[11] It also offers business renewable-energy options: Energy for Tomorrow lets customers match 25%, 50%, or 100% of electricity use with renewable energy, while Renewable Pathway offers eligible Wisconsin commercial and industrial customers renewable supply under one- or five-year agreements.[12][13] As of the first quarter of 2026, WEC reported contracts for 2.1 Bcf of renewable natural gas and transportation of dairy-farm RNG into Wisconsin distribution systems.[14] [8]+11

Geographic presence

As of the FY2025 reporting year, WEC Energy Group served approximately 4.7 million customers across Wisconsin, Illinois, Michigan, and Minnesota. Its utility service territories are concentrated in those states: Wisconsin territories include Milwaukee and surrounding areas, northeastern Wisconsin, and large parts of central and western Wisconsin; Upper Michigan Energy Resources serves designated areas of Michigan’s Upper Peninsula.[2][3]

WEC reports utility operating revenue by regulatory jurisdiction. In 2025, electric operating revenue was 90.0% Wisconsin, 3.1% Michigan, and 6.9% FERC-wholesale; natural-gas operating revenue was 44.0% Wisconsin, 42.5% Illinois, 8.3% Minnesota, and 5.2% Michigan. These are percentages within the electric and natural-gas categories, not shares of consolidated revenue.[15] The company is headquartered in Milwaukee, Wisconsin, and reported 7,000 employees; the cited sources do not provide employee distribution by location.[16][5] [2]+4

Business segments

WEC Energy Group reports six segments. **Wisconsin** comprises the electric and natural-gas utility operations of WE, WPS, WG, and UMERC; in 2025 it contributed approximately 74.4% of consolidated external revenue and 67.7% of net income attributed to common shareholders.[17][18] **Illinois** comprises the natural-gas utilities PGL and NSG, contributing approximately 17.2% of external revenue and 7.8% of net income.[19][18] **Other States** comprises the natural-gas utilities MERC and MGU, as well as MERC’s non-utility operations; it contributed approximately 5.4% of external revenue and 3.9% of net income.[20][18]

**Electric Transmission** consists principally of WEC’s interests in ATC, a FERC-regulated transmission-only company, and ATC Holdco, which invests in transmission projects beyond ATC’s traditional footprint. It contributed approximately 9.5% of 2025 net income.[21][18] **Non-Utility Energy Infrastructure** includes We Power’s generating facilities leased to WE, Bluewater’s underground gas storage, and WECI’s renewable generating interests; it contributed approximately 3.0% of external revenue and 26.4% of net income.[22]+4 **Corporate and Other** includes holding-company and other operations such as WEC Energy Group, Integrys and PELLC holding companies, Wispark, Wisvest, WECC, and WBS; its net loss was equivalent to approximately negative 15.3% of consolidated net income.[26][18] Percentages are calculated from 2025 segment results and consolidated totals; negative contribution reflects the Corporate and Other loss.[18] [17]+20

Company history

WEC Energy Group’s utility roots trace to 1896, when the Milwaukee Electric Railway and Light Co. was formed to provide electric, steam and interurban rail service. Its predecessor adopted the Wisconsin Electric Power Co. name in 1938, and Wisconsin Electric expanded through the 1941 purchase of Wisconsin Gas & Electric and Wisconsin Michigan Power. Later milestones included the first Oak Creek generating unit in 1953 and the start of operations at Point Beach Nuclear Plant in 1970.[27]

Wisconsin Energy Corporation was incorporated in 1981 and became a diversified holding company in 1986. It acquired WICOR, parent of Wisconsin Gas, in 2000; Wisconsin Natural merged with Wisconsin Electric in 1996, and the combined utility adopted the We Energies name in 2002. In 2007, WPS Resources merged with Peoples Energy and became Integrys Energy Group. On June 29, 2015, Wisconsin Energy completed its acquisition of Integrys and changed its name to WEC Energy Group, Inc.[28]+4 [28]+4

Sources

• WEC ENERGY GROUP, INC. — Full financial report (2025 Y)
  16 citations

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• www.wecenergygroup.com[3]
• WEC ENERGY GROUP, INC. — Full financial report (2026 Q 2)[4]
• investor.wecenergygroup.com[5]
• www.wecenergygroup.com[6]
• investor.wecenergygroup.com[7]
• www.we-energies.com[9]
• www.we-energies.com[10]
• www.we-energies.com[12]
• www.we-energies.com[13]
• WEC ENERGY GROUP, INC. — Full financial report (2026 Q 1)[14]
• www.wecenergygroup.com[16]
• www.wecenergygroup.com[27]
• www.wecenergygroup.com[29]
• www.sec.gov[30]