On Friday, Cathie Wood-ledArk Invest did a flurry of trades involving some of its key portfolio stocks, notably adding a big chunk of shares of AI-levered Palantir Technologies, Inc. (NYSE:PLTR). AI Pickings: Ark, through its ARK Autonomous Technology & Robotics ETF (CBOE: ARKQ), bought 100,344 shares of Palantir, valued at $2.26 billion. This was in addition to the 45,229 shares, worth $981,923, it acquired on Thursday. Palantir is scheduled to report its first-quarter results on May 5. Analysts, on average, expect the company to report earnings per share of 8 cents per share on revenue of $6…