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.

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.

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.

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.

The artificial intelligence (AI) boom has been a huge benefit to the business, and with the stock up more than 10x in just a few short years, it would be understandable for investors who didn't get in earlier to think they missed the boat.