SpaceX stock is not a company that investors can buy through standard channels. You will not find it on the New York Stock Exchange (NYSE) or the Nasdaq. SpaceX is not a publicly-traded company, it is privately held.
What SpaceX is? It is an aerospace company that designs and builds rockets and communication satellites.
The main product is the Falcon 9 rocket, a reusable rocket.
Investing in trusts on the LSE may be difficult for US investors. Perhaps the most straightforward and least risky way to gain exposure to SpaceX stock is by buying Alphabet (GOOG, GOOGL) stock.
An alternative way to buy SpaceX stock is through the secondary market. Several online marketplaces link employees in private companies with pre-IPO shares and investors.