Last Updated: November 2025 — Alpharetta, GA
Here’s what you need to know about Alpharetta, GA stockbroker John P. Mastrogianakis:
- Name: John Paul Mastrogianakis
- Alias: John Mastro
- Current Employer: Truist Investment Services, Inc. (FINRA broker) and Truist Advisory Services, Inc. (investment adviser); branch locations include 9919 Haynes Bridge Rd., Alpharetta, GA 30022 Registered with Truist Investment Services since 08/01/2024 and Truist Advisory Services since 08/05/2024.
- Prior Firms: Cetera Investment Services LLC (05/2024–07/2024); Cetera Investment Advisers LLC (05/2024–07/2024); Truist Investment Services, Inc. (03/2013–12/2023); Truist Advisory Services, Inc. (09/2018–12/2023); FSC Securities Corporation (05/2009–03/2012); American Skandia Marketing, Inc. (02/2007–10/2007); Jackson National Life Distributors LLC (04/2006–01/2007).
- CRD number: 5100871.
- Stockbroker / Financial Advisor. Yes—FINRA General Securities Representative & Principal; Investment Adviser Representative; currently registered with 1 SRO and licensed in 17 U.S. states/territories.
- Can Broker be Sued in FINRA: Yes
- Current Customer Dispute Seeks Damages: Amount not yet specified
If you’ve sustained damages from Mr. Mastrogianakis, discuss your case with experienced investment fraud lawyer Bob Rex at (877) 224-3199 for a free consultation.
Did You Lose Money With John P. Mastrogianakis As Your Stockbroker?
A pending customer dispute was filed in August 2025. A customer of Truist Investment Services alleges misrepresentation regarding an exchange from a variable annuity to a fixed annuity Damages are not yet specified.
See this for our prior investigations of cases involving Annuities
Allegations of Broker Misconduct Against John P. Mastrogianakis
- Misrepresentation
- Improper Variable Annuity Exchange Practices
Recover Your Investment Losses Now With Rex Securities Law
Investigations of Other Truist Investment Services brokers
If you have suffered investment losses in an account handled by John P. Mastrogianakis, contact us for a complimentary consultation with an experienced securities lawyer to learn how you may be able to recover damages through FINRA arbitration.
With offices in Boca Raton, FL, and Austin, TX, stockbroker fraud attorney Bob Rex provides representation to investors nationwide who are seeking recovery of investment losses due to the negligence or fraud of stockbrokers, financial advisors, and broker-dealers.
If you have questions about how your account has been handled, call (877) 224-3199 to speak with an experienced securities attorney at no cost to you.
Most cases are handled on a contingent fee basis, meaning that you do not pay legal fees unless we are successful.