Elon Musk's SpaceX has proposed an initial investment of $55 billion to build a semiconductor manufacturing facility, called Terafab, in Texas, according to a filing made public on Wednesday. SpaceX is also targeting a June IPO that could value the company at around $1.75 trillion. Musk has been tightening integration of AI efforts across his companies, with SpaceX acquiring his startup xAI earlier this year in a deal focused on building space-based data centers for artificial intelligence processing.