Along with OpenAI, this fund's top five holdings include SpaceX, robot maker Figure AI, Elon Musk's Neuralink, and AI computing company Lambda Labs.

There are many exciting, fast-growing companies that investors wish would go public so they could buy their stock. At the top of the initial public offering (IPO) wish lists for many investors are probably artificial intelligence (AI) model builder OpenAI, best known for its ChatGPT chatbot, and Elon Musk's SpaceX.

A person generally has to be rich and well connected to invest in venture capital (VC)-backed private companies. But there's a fund that enables everyday investors to invest in this asset class for a minimum of just $500: ARK Invest's ARK Venture Fund ( ARKVX -1.25% ) , run by well-known investor Cathie Wood.

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