GlobalData Plc - Siemens AG (SIE) - Oil Gas - Deals and Alliances Profile: Siemens AG (SIE) - Oil &amp; Gas - Deals and Alliances Profile Summary Siemens AG (Siemens) is a conglomerate. It has operations in the electrification, automation and… https://t.co/hmKkOx1sMR #equity #stocks https://t.co/hbRDc60eAn