Last Updated: June 2026 — Rockville, MD
Here’s what you need to know about Rockville, MD stockbroker Luke Lannister:
- Name: Luke Foster Lannister
- Alias: Lucas Foster Seward, Lucas Seward
- Current Employer: Suspended by FINRA and permanently barred by Maryland regulators
- Prior Firms: Grove Point Investments, LLC(formerly H Beck) (02/2021–11/2023); CUSO Financial Services, L.P. (05/2016–01/2021); Capital One Investing, LLC (04/2015–01/2016); NFP Advisor Services, LLC (07/2014–01/2015)
- Other Business Affiliations: Waterford Wealth Management – Insurance (Producer; investment-related insurance sales; Rockville, MD)
- CRD number: 6317373
- Can Broker be Sued in FINRA: Yes
- Sanctioned by Securities Regulators: Yes
- Discharged by a Prior Employer: Yes
- Highest Award or Settlement: $41,850
If you’ve sustained damages from Mr. Lannister, discuss your case with experienced investment fraud lawyer Bob Rex at (877) 224-3199 for a free consultation.
Did You Lose Money With Luke Lannister As Your Stockbroker?
Regulatory Actions (FINRA & Maryland Securities Regulators) — In September 2025 (Docket/Case No. 2023079960501), FINRA accepted an AWC in which Mr. Lannister consented to findings that he exercised discretion without prior written authorization in two customer accounts and inaccurately answered annual compliance questionnaires. Sanctions: $5,000 fine and two-month suspension (10/06/2025–12/05/2025). In 1/2026 FINRA suspended Lannister indefinitely and Maryland regulators permanently barred him from the industry to resolve allegations that he engaged in excessive and unsuitable trading in customer accounts, including overconcentrating accounts in one or a small number of securities and using inappropriate short term trading strategies.
Customer Disputes
- Grove Point Investments, LLC: Customer alleged misrepresentation of compensation, unauthorized/discretionary trading, and churning (5/25/2022–5/25/2023). Settled for $41,850 on 11/29/2023.
- Grove Point Investments, LLC: Customer alleged discretionary trading in inappropriate stocks relative to the client’s risk tolerance (1/17/2023–5/25/2023). Settled for $30,000 (10/12/2023).
- CUSO Financial Services, L.P.: Customers alleged an incorrect explanation of a GMWB rider on a variable annuity purchased in 9/2020,. Settled for $38,955. (5/21/2024).
Terminated 11/28/2023 by Grove Point Investments, LLC following an investigation which revealed excessive commissions and unapproved discretionary trading.
Other Cases Involving Unauthorized Trading
Allegations of Broker Misconduct Against Luke Lannister
- Unauthorized Trading / Use of Discretion. Placing trades without prior written customer authorization and firm approval may violate FINRA Rule 3260 (Discretionary Accounts) and FINRA Rule 2010; this conduct underlies the 2025 FINRA AWC noted above.
- Churning/ Excessive Trading
- Unsuitable Short Term Trading
- Unsuitable Recommendations
- Over-concentrating accounts
- Failing to disclose comparative costs and fee implications of commission based versus fee based accounts
- Encouraging customers to sign incomplete forms that were later completed by Lannister
What is Excessive Trading (Churning)?
Churning According to U.S. Securities and Exchange Commission (SEC)
Other Investigations Involving Churning
Investigations involving Over-Concentration
Recover Your Investment Losses Now With Rex Securities Law
If you have suffered investment losses in an account handled by Luke Lannister, contact us for a complimentary consultation with an experienced securities lawyer to learn how you may be able to recover damages through FINRA arbitration.
Firms We Have Pursued On Behalf of Our Clients
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.