Palantir Technologies Inc. (PLTR) has emerged as the top-performing stock in the S&P 500 for 2025, with its shares rising 3% on the latest trading day and achieving a year-to-date increase of more than 60%. The company's stock performance has been bolstered by aggressive bullish options trading, with a net options delta of +950,000 shares and significant purchases of out-of-the-money call options at $120. Palantir's market cap is nearing that of Salesforce Inc. (CRM), being less than 3% away from surpassing it on a diluted basis. Meanwhile, Super Micro Computer Inc. (SMCI) has also seen notable gains, with its stock surging 14% on the day, reaching $54 from $26 earlier in the month, driven by optimism around potential big AI server deals. SMCI's volume surpassed that of major tech companies like Apple, Microsoft, Amazon, Google, and Intel, and its stock has been testing significant technical levels, including the 200-day moving average and a resistance at $55. SMCI's stock was up 11% on the day, marking it as the top performer in the S&P 500.