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Peter James Sosnowski

SIEBERT ADVISORNXT, LLC.
NEW YORK, NY
·CRD# 1540143·40 years experience

Professional Summary

Peter James Sosnowski is a registered financial advisor currently at SIEBERT ADVISORNXT, LLC. located in New York, New York and MURIEL SIEBERT & CO., LLC located in New York, New York. Peter is registered as an IAR (Investment Advisor Representative) and RR (Registered Representative) and started their career in finance in 1986. Peter has worked at 4 firms and has passed the Series 65, Series 63, Series 79TO, Series 57TO, Series 99TO, Series 52TO, SIE,...

At a Glance

Advisory Accounts Only

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Other Aliases

There are no additional aliases reported.

Blog Corner

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Videos & Posts

This advisor has not added any videos or posts yet.

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Contact Information

Email

xxxxx@xxxx.xxx

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Disclosures are events reported to regulators, such as customer disputes, regulatory actions, employment separations, or financial events. Some are resolved, denied, or contested — a disclosure is not a verdict. We recommend asking an advisor directly about any disclosure on their record.

Disclosures on record.

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.

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Years of Experience

40 years in the financial services industry

Current & Past Employments

SIEBERT ADVISORNXT, LLC.·CRD# 288572
RIA
300 Vesey Street 5th Floor, New York, NY, 10282
November 21, 2017 - Present
MURIEL SIEBERT & CO., LLC·CRD# 5376
BD
1. 300 Vesey Street 5th Floor, New York, NY, 102822. 300 Vesey Street Suite 501, New York, NY 102823. 303 E. Wacker Dr. Suite 2950, Chicago, IL 606014. 226 N Front St. #169, Wilmington, NC 28401
June 1, 1999 - Present
SIEBERT INVESTMENT ADVISORS, INC.·CRD# 169231
RIA
New York, NY
November 19, 2014 - December 19, 2017
SIEBERT INVESTMENT ADVISORS, INC.·CRD# 169231
RIA
New York, NY
March 27, 2014 - June 10, 2014
ANDREW PECK ASSOCIATES INC.·CRD# 7957
BD
Jersey City, NJ
August 19, 1986 - June 25, 1999

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Current Firm

SA
SIEBERT ADVISORNXT, LLC.

SIEBERT ADVISORNXT, INC. | SIEBERT ADVISORNXT, LLC.

CRD#: 288572 / SEC#: 801-110718
RIA
Registered Investment Advisory firm - SEC (7/11/2017 Approved)

Contact Information

Main Address

300 Vesey Street 5th Floor, New York, NY, 10282

Mailing Address

653 Collins Avenue, Miami Beach, FL 33139

Phone Number

(800) 872-0444

# of Employees

43

SEC notice filing (43 States and Territories)

Registered to provide investment advisory services in 43 US states and territories.

Documents

Customer Relationship Summary (CRS / SEC)Latest Form ADV

Part 2 Brochures

SIEBERT ADVISORNXT PART 2 BROCHURE 9-22-2026 (9/23/2026)

Regulatory Assets Under Management

Total Number of Accounts

973

AUM (Assets Under Management)

$391,509,579

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Other business activities

Outside business activity is any business or activity undertaken by an advisor that is outside the scope of their relationship with their firm (e.g., consulting services, real estate, freelance work, teaching, etc.). Investors should stay informed about these activities to ensure no conflicts of interest.

Name of Business: Siebert AdvisorNxt, LLC Investment Related: Yes Location: Same location as Muriel Siebert, & Co., LLC Nature of business: Investment Advisory Firm Position, Title or Relationship: Dual employee. Investment Advisor Representative Approximate number of hours: Full time. Time split 50/50 between Muriel Siebert & Co., LLC and Siebert AdvisorNxt, LLC, subject to monthly change Compensation at both entities paid by same parent company, Siebert Financial Corporation as both are under common ownership and control of parent company.

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Primary Firm SEC Registration

This SEC-registered firm can serve clients nationwide. Some states may require the firm to submit a notice filing if the firm has more than 5 clients or a physical office there. You can view these state-level filings under the section titled "State Registrations and Notice Filings".
SA
SIEBERT ADVISORNXT, LLC.

SIEBERT ADVISORNXT, INC. | SIEBERT ADVISORNXT, LLC.

CRD#: 288572 / SEC#: 801-110718
RIA
Registered Investment Advisory firm - SEC (7/11/2017 Approved)

State Registrations and Notice Filings

Listed states reflect where the advisor is authorized to serve clients under state regulations.
IAR
means the advisor is registered as an Investment Advisor Representative in this state and is authorized to provide investment advice to clients there.
RR
indicates the advisor is registered as a Registered Representative in this state, allowing securities offerings such as stocks, bonds, and mutual funds through a broker-dealer.
RR
Alabama
(1/2/2019)
RR
Alaska
(1/2/2019)
RR
Arizona
(1/2/2019)
RR
Arkansas
(1/2/2019)
RR
California
(7/21/1999)
RR
Colorado
(1/2/2019)
RR
Connecticut
(1/2/2019)
RR
Delaware
(1/2/2019)
RR
District of Columbia
(1/2/2019)
RR
Florida
(7/22/1999)
RR
Georgia
(1/2/2019)
RR
Hawaii
(1/2/2019)
RR
Idaho
(1/2/2019)
RR
Illinois
(1/2/2019)
RR
Indiana
(1/2/2019)
RR
Iowa
(1/2/2019)
RR
Kansas
(1/2/2019)
RR
Kentucky
(1/2/2019)
RR
Louisiana
(1/2/2019)
RR
Maine
(1/2/2019)
RR
Maryland
(1/2/2019)
RR
Massachusetts
(3/5/2018)
IAR
Massachusetts
(4/30/2018)
RR
Michigan
(1/2/2019)
RR
Minnesota
(1/2/2019)
RR
Mississippi
(1/2/2019)
RR
Missouri
(1/2/2019)
RR
Montana
(1/2/2019)
RR
Nebraska
(1/2/2019)
RR
Nevada
(1/2/2019)
RR
New Hampshire
(1/2/2019)
IAR
New Jersey
(11/21/2017)
RR
New Jersey
(1/2/2018)
RR
New Mexico
(1/2/2019)
RR
New York
(7/21/1999)
IAR
New York
(8/27/2021)
RR
North Carolina
(1/2/2019)
RR
North Dakota
(1/2/2019)
RR
Ohio
(1/3/2019)
RR
Oklahoma
(1/2/2019)
RR
Oregon
(1/2/2019)
RR
Pennsylvania
(1/2/2019)
RR
Puerto Rico
(1/2/2019)
RR
Rhode Island
(1/2/2019)
RR
South Carolina
(1/2/2019)
RR
South Dakota
(1/2/2019)
RR
Tennessee
(1/2/2019)
RR
Texas
(1/2/2019)
RR
Utah
(1/2/2019)
RR
Vermont
(1/2/2019)
RR
Virginia
(1/2/2019)
RR
Washington
(1/2/2019)
RR
West Virginia
(1/2/2019)
RR
Wisconsin
(1/2/2019)
RR
Wyoming
(1/2/2019)

Don't see your state listed? The advisor may still be able to work with you under the federal De Minimis Rule, which allows up to five investment advisory clients in a state without registration. Some states, like TX, LA, NE, and NH, may still require registration or notice filing. Contact the advisor or their firm to confirm their investment advisory availability in your state.Note:This rule does not apply to broker-dealer activity.

Exams

Financial professionals may take different exams throughout their careers based on the types of services they provide and roles they perform.

Series 65 — Uniform Investment Adviser Law Examination

Passed Feb 2014About the Series 65 exam

Series 63 — Uniform Securities Agent State Law Examination

Passed Oct 1986About the Series 63 exam

Series 79TO — Investment Banking Registered Representative Examination

Passed Oct 2025About the Series 79TO exam

Series 57TO — Securities Trader Exam

Passed Jan 2023About the Series 57TO exam

Series 99TO — Operations Professional Examination

Passed Jan 2023About the Series 99TO exam

Series 52TO — Municipal Securities Representative Examination

Passed Jan 2023About the Series 52TO exam

SIE — Securities Industry Essentials Examination

Passed Oct 2018About the SIE exam

Series 55 — Limited Representative-Equity Trader Exam

Passed Feb 2000

Series 7 — General Securities Representative Examination

Passed Aug 1986About the Series 7 exam

Series 9 — General Securities Sales Supervisor - Options Module Examination

Passed Jan 2023About the Series 9 exam

Series 10 — General Securities Sales Supervisor - General Module Examination

Passed Jan 2023About the Series 10 exam

Series 8 — General Securities Sales Supervisor Examination (Options Module & General Module)

Passed Aug 1999

Series 24 — General Securities Principal Examination

Passed Sep 1997About the Series 24 exam

Series 53 — Municipal Securities Principal Examination

Passed Feb 1990About the Series 53 exam

Series 4 — Registered Options Principal Examination

Passed Aug 1988About the Series 4 exam
FINRA
SRO Registrations
NYSE American LLC
SRO Registrations
Nasdaq Stock Market
SRO Registrations
New York Stock Exchange
SRO Registrations

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CRS (Client Relationship Summary) - RIA

Click below to view Peter James Sosnowski's CRS (Customer Relationship Summary).

CRS (Customer Relationship Summary)

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