And this stock is Super Micro Computer ( SMCI 0.07%), a company that saw its stock price soar 188% in the first half, surpassing Nvidia's 149% increase. Though individual forecasts vary, the average Wall Street estimate calls for the stock to climb 90% from today's level.

Nvidia completed a 10-for-1 split in June, and Supermicro recently announced a 10-for-1 split, with the stock to begin trading at its new price as of Oct. 1. Both of these players have soared over the past few years thanks to their dominance in the AI market and make great long-term buys -- but which one is the better buy today?

It might interest investors, then, that Nvidia's CEO, Jensen Huang, has been selling some of his Nvidia holdings. In the last month alone, Huang sold 720,000 shares totaling about $78 million.