We are a Fortune 500 energy-services holding company. Through our businesses, which consist of seven separately managed reportable segments, we invest in, develop and operate energy infrastructure, and provide electric and gas services to customers in North and South America. We were formed in 1998 through a business combination of Enova and PE, the holding companies of our regulated public utilities in California: SDG&E, which began operations in 1881, and SoCalGas, which began operations in 1867. Since our formation in 1998, we have expanded our investment in regulated utility operations through acquisitions in North and South America. However, in January 2019, our board of directors approved a plan to sell our South American businesses based on our strategic shift to be geographically focused on North America. In March 2018, we acquired an indirect ownership interest in Oncor, a regulated electric transmission and distribution business that operates the largest transmission and distribution system in Texas. In 1995, we entered the energy infrastructure business in Mexico through what is now known as IEnova, the first energy infrastructure company to be listed on the Mexican Stock Exchange. IEnova has a diverse portfolio of projects and assets serving Mexico’s growing energy needs. Our energy infrastructure footprint continues to expand across North America, through LNG projects and assets in Louisiana, Texas and Mexico.
In the three months ended September 30, 2019, we reported earnings of $813 million and diluted EPS of $2.84 compared to earnings of $274 million and diluted EPS of $0.99 for the same period in 2018. In the nine months ended September 30, 2019, we reported earnings of $1,608 million and diluted EPS of $5.74 compared to earnings of $60 million and diluted EPS of $0.23 for the same period in 2018. The change in diluted EPS in the three months and nine months ended September 30, 2019 included a decrease of $0.20 and $0.31, respectively, due to an increase in weighted-average common shares outstanding. Our results and diluted EPS were impacted by variances discussed in “Segment Results” below and by the items included in the table “Sempra Energy Adjusted Earnings and Adjusted EPS,” also below.