Halper Sadeh LLC said it is investigating the proposed sales of MarketAxess Holdings Inc., CBIZ, Inc., MarineMax, Inc., Beazer Homes USA, Inc. and Accelerant Holdings for potential violations of federal securities laws and possible breaches of fiduciary duties to shareholders. The firm said insiders may receive substantial financial benefits not available to ordinary shareholders and that the transactions may include terms that could restrict superior competing offers. The deals under review are MarketAxess's sale to Intercontinental Exchange, Inc. for $167.00 per share in cash, CBIZ's sale to Grant Thornton Advisors LLC for $55.00 per share in cash, MarineMax's sale to Safe Harbor Marinas for $53.00 per share in cash, Beazer Homes USA's sale to Dream Finders Homes, Inc. for $33.50 per share in cash, and Accelerant Holdings' sale to Thoma Bravo for $20.25 per share in cash. Halper Sadeh said it may seek increased consideration, additional disclosures and information, or other relief on behalf of shareholders.