Cathie Wood and Elon Musk.Ark Investment Management; Samuel Corum/Getty ImagesIn an email to subscribers, Ark Invest highlighted its exposure to Elon Musk's private companies.Its venture fund includes stakes in SpaceX, X, and xAI, totaling nearly 15% of net assets.Ark Invest hyped Musk's influence with Donald Trump, saying his companies could also benefit.Cathie Wood's Ark Invest is banking on Elon Musk, the world's richest man whose closeness with President-elect Donald Trump has launched him to a new pinnacle of fame, to deliver new retail investors to its flock.The fund recently sent an email to subscribers pitching investors on the money management fund's exposure to startups owned and run by Musk.Ark Invest operates an itty-bitty, $70 million fund to invest in private tech companies and allows regular investors to buy and sell shares on a regular basis.The fund has gathered stakes in some of the most valuable and hyped startups in tech, including OpenAI, Anthropic, and Stripe, though, in a recent interview, Ark Invest "futurist" and fund manager Brett Winton acknowledged that its modest check sizes limit the kind of returns investors can expect."We're excited to bring you a unique opportunity to gain exposure to some of Elon Musk's most sought-after private companies through the ARK Venture Fund," Ark said in an email sent on Tuesday.