W-9 tax forms The W-9 forms for Sempra, San Diego Gas & Electric (SDG&E) and Southern California Gas Company (SoCalGas) can be downloaded here. If you would like a W-9 for a different Sempra company, please fill out the W-9 Form Request. Signed W-9 tax forms SEMPRA W-9 SDG&E W-9 SOCALGAS W-9 W-9 form request for other Sempra companies First Last Requestor Company Name Email Phone Number List the requested Company(s) W-9 Forms Additional Comments Submit Leave this field blank Hide page title On Blocks Page