Kaplan Fox & Kilsheimer LLP is investigating Cerebras Systems for potential securities violations following a sharp 19.6% stock drop after its Q1 2026 earnings call. The company revealed it would temporarily rent back its own AI systems from a customer to meet demand, which would reduce profit margins by 10-15 points. This unexpected cost caused investor concern, leading to the stock price falling from $226.72 to $182.26. Investors who suffered losses or have relevant information are encouraged to contact the law firm as the investigation proceeds.