Halper Sadeh LLC said it is investigating three proposed transactions involving Baldwin Group, ACV and Swarmer, citing potential violations of federal securities laws and breaches of fiduciary duties to shareholders. The deals include Baldwin's proposed sale to Sequence Holdings and DFO Management for $32.50 in cash per share, ACV's sale to Copart for $10.50 per share in cash, and Swarmer's merger with Ratel Robotics for up to $224 million in cash and stock. The firm said transaction terms may restrict superior competing offers and could provide insiders with financial benefits unavailable to ordinary shareholders. It may seek higher consideration, additional disclosures and information, or other relief for shareholders. The firm is offering consultations at no cost or obligation and says matters would be handled on a contingent-fee basis, with clients not responsible for out-of-pocket legal fees or expenses.