Sempra (NYSE:SRE) is included among the Best High Yield Stocks to Buy in October. Sempra’s (SRE) Dividend Yield: What Makes it Stand Out This Month Sempra (NYSE:SRE) is involved in regulated utilities and building energy infrastructure. Its utility operations provide electricity and natural gas in California by San Diego Gas & Electric (SDG&E) and Southern California Gas Company (SoCalGas), and in Texas by Oncor and Sharyland Utilities. These companies have millions of customers with government-regulated ...