Each company looks to be headed into another year of unprecedented growth.Few stocks have been as successful as Palantir (PLTR +1.36%) and Nvidia (NVDA +1.37%) have been during the artificial intelligence (AI) arms race. Since 2023, Nvidia's stock is up 1,100%, and Palantir's is up nearly 2,300% (at the time of this writing). That's an impressive run in just under three years' time, but what they've each done in 2025 is also impressive. Palantir is up around 100% in 2025, while Nvidia is up over 30%. Both o ...