Sean Francis Mostero, of Torrance, California, a stockbroker previously registered with LPL Financial LLC, has been barred by Financial Industry Regulatory Authority (FINRA) from associating with any FINRA member in all capacities because Mostero failed to respond to FINRA’s requests for information. FINRA Case No. 2024081064401 (July 19, 2024). FINRA initiated an investigation on March…