Mario G. Didomenico
Professional summary
Mario Guiseppe Didomenico, who also goes by Mario Giuseppe Didomenico, Mario Joseph Didomenico, Mark Dominick, is a registered financial advisor currently at SIEBERT ADVISORNXT, LLC. located in Jersey City, New Jersey and MURIEL SIEBERT & CO., LLC located in New York, New York.
Mario is registered as an IAR (Investment Advisor Representative) and RR (Registered Representative) and started their career in finance in 1993. Mario has worked at 18 firms and has passed the Series 66, Series 63, SIE, Series 7 and Series 24 exams.
Question & Answer
Aliases
Other business activities
CRS (Client Relationship Summary) - RIA
Click below to view Mario Guiseppe Didomenico's CRS (Customer Relationship Summary).
Certified licenses
Experience
November 21, 2017 - Present
SIEBERT ADVISORNXT, LLC.
Office #1: 15 Exchange Place, Jersey City, NJ 07302February 1, 2018 - Present
MURIEL SIEBERT & CO., LLC
Office #1: 300 Vesey Street Suite 501, New York, NY 10282October 17, 2017 - December 31, 2017
STOCKCROSS FINANCIAL SERVICES, INC.
October 16, 2017 - January 2, 2020
STOCKCROSS FINANCIAL SERVICES, INC.
October 27, 2015 - October 24, 2017
CETERA INVESTMENT ADVISERS LLC
September 8, 2015 - October 24, 2017
SUMMIT BROKERAGE SERVICES, INC.
March 17, 2011 - September 29, 2015
J.P. TURNER & COMPANY, L.L.C.
March 4, 2011 - November 13, 2015
J P TURNER & COMPANY CAPITAL MANAGEMENT, LLC
May 27, 2008 - March 4, 2011
LPL FINANCIAL LLC
May 27, 2008 - March 4, 2011
LPL FINANCIAL LLC
June 3, 2003 - May 27, 2008
IFMG SECURITIES, INC.
September 23, 2002 - May 27, 2008
IFMG SECURITIES, INC.
July 16, 2002 - September 12, 2002
AMERIPRISE ADVISOR SERVICES, INC.
September 17, 1997 - May 16, 2002
NATIONAL CLEARING CORP.
June 25, 1997 - September 20, 1997
SHAMUS GROUP, INC.
October 9, 1996 - June 16, 1997
THE BOSTON GROUP
January 26, 1996 - October 1, 1996
NATIONAL CLEARING CORP.
May 26, 1995 - December 21, 1995
INVESTORS ASSOCIATES, INC.
December 8, 1994 - May 5, 1995
GILFORD SECURITIES INCORPORATED
September 20, 1994 - December 13, 1994
GKN SECURITIES CORP.
June 27, 1994 - August 18, 1994
MAIDSTONE FINANCIAL, INC.
October 29, 1993 - May 20, 1994
AMERICORP SECURITIES, INC.
Primary Firm SEC Registration
SIEBERT ADVISORNXT, LLC.
CRD#: 288572 / SEC#: 801-110718
State Registrations and Notice Filings
Listed states reflect where the advisor is authorized to serve clients under state regulations.
Visual representation of state registrations
(11/12/2025)
(11/13/2025)
(2/28/2018)
(6/23/2022)
(11/22/2017)
(2/2/2018)
(9/29/2020)
(1/25/2023)
(7/24/2018)
(3/28/2019)
(12/14/2017)
(2/5/2018)
(9/27/2018)
(9/28/2018)
(10/13/2023)
(2/12/2018)
(12/2/2020)
(9/25/2023)
(10/23/2023)
(5/13/2024)
(3/10/2023)
(4/1/2026)
(4/9/2020)
(7/12/2021)
(4/2/2018)
(6/19/2018)
(4/9/2024)
(4/12/2024)
(12/1/2020)
(5/13/2024)
(3/16/2018)
(9/4/2020)
(10/15/2025)
(10/15/2025)
(6/11/2020)
(11/21/2017)
(3/1/2018)
(3/1/2018)
(8/27/2021)
(5/21/2018)
(6/14/2018)
(12/1/2020)
(1/31/2025)
(1/18/2023)
(1/18/2023)
(7/27/2021)
(10/21/2025)
(10/22/2025)
(3/15/2018)
(6/21/2019)
(11/7/2023)
(11/7/2023)
(12/3/2019)
(4/8/2019)
(4/8/2019)
(3/20/2023)
(3/16/2018)
Exams
FINRA
NYSE American LLC
Nasdaq Stock Market
New York Stock Exchange
Current Firm
SIEBERT ADVISORNXT, LLC.
CRD#: 288572 / SEC#: 801-110718
Contact information
SEC notice filing (43 States and Territories)
Regulatory assets under management
| Total Number of Accounts | 786 |
| AUM (Assets Under Management) | $ 287,623,668 |
Red Flags
Disclosures can be potential red flags, including customer disputes, regulatory fines, employer terminations, bankruptcies, judgments, liens, or certain criminal activities.
Check for any disclosures as part of your thorough research when choosing an advisor.
