David K. Mallett, a stockbroker formerly registered with Wunderlich Securities, Inc., has been suspended from associating with any Financial Industry Regulatory Authority (FINRA) member in any capacity based upon allegations that he failed to respond to FINRA personnel’s information request. Letter No. 2015047762601 (Feb. 3, 2017). FINRA Public Disclosure reveals that on December 8, 2015,…