FINANCIAL INDUSTRY REGULATORY AUTHORITY LETTER OF ACCEPTANCE, WAIVER, AND CONSENT NO. 2019061365002 TO: Department of Enforcement Financial Industry Regulatory Authority (FINRA) RE: Sean D. Casterline (Respondent) General Securities Representative and General Securities Principal CRD No. 2212919 Pursuant to FINRA Rule 9216, Respondent Sean D. Casterline submits this Letter of Acceptance, Waiver, and Consent (AWC) for the purpose of proposing a settlement of the alleged rule violations described below.