Group 1 - The article discusses class action lawsuits against Plug Power Inc. and Richtech Robotics Inc., alleging misleading statements and failure to disclose material facts [1][2] - The lawsuit against Plug Power claims that the company misrepresented the availability of funds from the Department of Energy Loan between January 17, 2025, and November 13, 2025 [1] - The lawsuit against Richtech Robotics alleges that the company failed to disclose important information regarding its relationship with Microsoft between January 27, 2026, and January 29, 2026 [2] Group 2 - The deadline to seek appointment as lead plaintiff in both cases is April 3, 2026 [2][3] - Holzer & Holzer, LLC is a law firm specializing in securities litigation, having recovered hundreds of millions of dollars for shareholders affected by corporate misconduct [3]