Complaint Reporting: If you become aware of unauthorized activity concerning your account or have an issue with the service Park Walk Capital Markets is providing, please contact us by calling (512) 886-4401, emailing uscompliance@parkwalk.com or mailing to: Park Walk Capital Markets LLC, Attn: Compliance, 1120 South Capital of Texas Hwy, Bldg. 1 - Ste. 120, Austin, TX 78746.