The rapidly growing adoption of artificial intelligence (AI) has given shares of many companies a big boost in the past couple of years, and that's not surprising as this technology is expected to impact the global economy in a big way.

Warren Buffett is the CEO of Berkshire Hathaway ( BRK.A 0.99%) ( BRK.B 0.95%), which has delivered an annual return of 19.8% since Buffett took the helm in 1965. That could have turned an investment of $1,000 into more than $42 million. The same investment in the S&P 500 index would have grown to just $308,115 over the same period.

US tech giant Nvidia is spreading its investments into smaller-cap AI companies, which will help promote the adoption of its products. This comes as demand for its graphics processing units (GPUs) is on an increase and projected to remain firm supported by continued adoption of the AI technology across sectors.

Looking for undervalued opportunities in the AI boom? Check out this trio of big AI winners that haven't popped up on Wall Street's radar screens yet.

Cloudflare estimates that its total addressable market could grow from $176 billion this year to $222 billion in 2027, driven by incremental growth opportunities in areas such as AI. This explains why the company has been investing in AI-specific hardware such as high-end graphics processing units (GPUs) to power its AI offerings.