Elon Musk is weighing a potential merger between Tesla and SpaceX, a move that could create a $3.5 trillion technology giant. With both companies expanding into AI, robotics, semiconductors, a merger could unlock synergies but also raise regulatory, and governance concerns for investors. Elon Musk is considering bringing two of his biggest business ventures, electric vehicle maker Tesla and rocket manufacturer SpaceX, under one corporate umbrella in a move that could create.