John S. Demertzis

CETERA INVESTMENT ADVISERS LLC

East Setauket, NY 11733

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CRD#: 2690132

Professional summary

John Spyro Demertzis, AIF®, who also goes by John S Demertzis, John Demertzis, is a registered financial advisor currently at CETERA INVESTMENT ADVISERS LLC located in East Setauket, New York and CETERA WEALTH SERVICES, LLC located in Naples, Florida.

John is registered as an IAR (Investment Advisor Representative) and RR (Registered Representative) and started their career in finance in 1996. John has worked at 13 firms and has passed the Series 65, Series 66, Series 63, SIE, Series 31, Series 7, Series 24 and Series 10 exams.

Question & Answer

Are you a "fiduciary"?

Yes

Aliases

John S Demertzis | John Demertzis

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.

1. ACTOR POSITION: ACTOR NATURE: My current project is Mob Mentality an Amazon Prime fictional show about organized crime INVESTMENT RELATED: No NUMBER OF HOURS: 5 SECURITIES TRADING HOURS: 5 START DATE: 07/28/2024 ADDRESS: 144 Hamlet Dr, Mount Sinai NY 11766, United States DESCRIPTION: learn the script act out the scrip prepare for the scrip go to filming locations 2. DEMERTZIS WEALTH MANAGEMENT INC. POSITION: Share holder NATURE: I will move over commissions needed to pay office expenses from doing Avantax business to this entity , Demertzis Wealth Management , Inc. INVESTMENT RELATED: No NUMBER OF HOURS: 1 SECURITIES TRADING HOURS: 1 START DATE: 01/05/2011 ADDRESS: 46 RT 25 A, Suite 10, East Setauket NY 11733, United States DESCRIPTION: Pay rent, Pay registration fees, pay advertising fees and operational costs

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view John Spyro Demertzis's CRS (Customer Relationship Summary).

CRS (Customer Relationship Summary)

Certified licenses

Advisors may have various certifications and credentials from different organizations. AdvisorCheck highlights these seven certifications - AIF®, CFP®, ChFC®, CFA, CLU®, CIMA®, CPWA®

AIF^®

Accredited Investment Fiduciary

Experience

Current

August 14, 2025 - Present

CETERA INVESTMENT ADVISERS LLC

Office #1: 46 Rt 25a Suite 10, East Setauket, NY 11733Office #2: 9045 Strada Stell Court 301, Naples, FL 34109

RIA

CRD#: 105644

East Setauket, NY

Current

September 5, 2025 - Present

CETERA WEALTH SERVICES, LLC

Office #1: 9045 Strada Stell Court 301, Naples, FL 34109Office #2: 46 Rt 25a Suite 10, East Setauket, NY 11733

CRD#: 13572

Naples, FL

Past

October 2, 2024 - September 5, 2025

AVANTAX ADVISORY SERVICES

RIA

CRD#: 104556

East Setauket, NY

Past

October 2, 2024 - September 5, 2025

AVANTAX INVESTMENT SERVICES, INC.

CRD#: 13686

East Setauket, NY

Past

November 2, 2010 - October 8, 2024

LPL FINANCIAL LLC

RIA

CRD#: 6413

EAST SETAUKET, NY

Past

October 28, 2010 - October 8, 2024

LPL FINANCIAL LLC

CRD#: 6413

EAST SETAUKET, NY

Past

December 11, 2009 - October 29, 2010

CHASE INVESTMENT SERVICES CORP.

RIA

CRD#: 25574

SMITHTOWN, NY

Past

May 15, 2009 - October 29, 2010

CHASE INVESTMENT SERVICES CORP.

CRD#: 25574

SMITHTOWN, NY

Past

January 1, 2005 - May 22, 2009

HSBC SECURITIES (USA) INC.

CRD#: 19585

MELVILLE, NY

Past

December 15, 2003 - January 1, 2005

HSBC BROKERAGE (USA) INC.

CRD#: 6956

NEW YORK, NY

Past

January 12, 2001 - December 15, 2003

UBS FINANCIAL SERVICES INC.

CRD#: 8174

WEEHAWKEN, NJ

Past

May 13, 1998 - January 19, 2001

CITICORP INVESTMENT SERVICES

CRD#: 23988

LONG ISLAND CITY, NY

Past

September 18, 1996 - May 5, 1998

MORGAN STANLEY DW INC.

CRD#: 7556

PURCHASE, NY

Past

April 18, 1996 - August 28, 1996

MATRIX SECURITIES CORPORATION

CRD#: 30991

GARDEN CITY, NY

Past

February 29, 1996 - March 26, 1996

TUSCANY EQUITY MANAGEMENT CORPORATI0N

CRD#: 20016

Past

February 28, 1996 - March 26, 1996

TUSCANY EQUITY MANAGEMENT CORPORATI0N

CRD#: 20016

DEERFIELD BEACH, FL

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".

CETERA INVESTMENT ADVISERS LLC

CRD#: 105644 / SEC#: 801-20406

RIA

Registered Investment Advisory firm - (1/13/1984 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.

indicates the advisor is registered as a Registered Representative in this state, allowing them to offer securities such as stocks, bonds, and mutual funds through a broker-dealer.

Visual representation of state registrations

Alabama
(9/5/2025)

Delaware
(9/5/2025)

IAR

Florida
(8/14/2025)

Florida
(9/5/2025)

Massachusetts
(11/14/2025)

New Jersey
(9/19/2025)

New York
(9/5/2025)

IAR

New York
(9/5/2025)

North Carolina
(9/5/2025)

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

State Security Law Exam

IAR

Series 65

Date: 1/22/2025

Uniform Investment Adviser Law Examination

State Security Law Exam

IAR

Series 66

Date: 12/7/2009

Uniform Combined State Law Examination

State Security Law Exam

Series 63

Date: 3/18/1996

Uniform Securities Agent State Law Examination

General Industry/Product Exam

SIE

Date: 10/1/2018

Securities Industry Essentials Examination

General Industry/Product Exam

Series 31

Date: 10/1/1996

Futures Managed Funds Examination

General Industry/Product Exam

Series 7

Date: 2/28/1996

General Securities Representative Examination

Principal/Supervisory Exam

Series 24

Date: 12/28/2011

General Securities Principal Examination

Principal/Supervisory Exam

Series 10

Date: 12/3/2004

General Securities Sales Supervisor - General Module Examination

SRO Registrations

FINRA

Current Firm

CETERA INVESTMENT ADVISERS LLC

CRD#: 105644 / SEC#: 801-20406

RIA

Registered Investment Advisory firm - (1/13/1984 Approved)

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Contact information

Main Address

1450 American Lane 6th Floor, Suite 650, Schaumburg, IL 60173-2096

Mailing Address

Phone number

(310) 257-7880

Established

Firm type

Fiscal year end

# of Employees

7,705

SEC notice filing (53 States and Territories)

Documents

Customer Relationship Summary (CRS / SEC)

Latest Form ADV

Regulatory assets under management

Total Number of Accounts	584,487
AUM (Assets Under Management)	$ 163,792,814,520

Accountant surprise examination report

Filing Date	Form ADV-E Cover	Form ADV-E Report
10/27/2025	Cover Page	Report
12/13/2024	Cover Page	Report
09/26/2023	Cover Page	Report
11/18/2022	Cover Page	Report

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.

Contact information

(xxx) xxx-xxxx

xxxxx@xxxx.xxx

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John S. Demertzis

Professional summary

Question & Answer

Aliases

Other business activities

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view John Spyro Demertzis's CRS (Customer Relationship Summary).

Certified licenses

Experience

CETERA WEALTH SERVICES, LLC

AVANTAX ADVISORY SERVICES

AVANTAX INVESTMENT SERVICES, INC.

LPL FINANCIAL LLC

LPL FINANCIAL LLC

CHASE INVESTMENT SERVICES CORP.

CHASE INVESTMENT SERVICES CORP.

HSBC SECURITIES (USA) INC.

HSBC BROKERAGE (USA) INC.

UBS FINANCIAL SERVICES INC.

CITICORP INVESTMENT SERVICES

MORGAN STANLEY DW INC.

MATRIX SECURITIES CORPORATION

TUSCANY EQUITY MANAGEMENT CORPORATI0N

TUSCANY EQUITY MANAGEMENT CORPORATI0N

Primary Firm SEC Registration

CETERA INVESTMENT ADVISERS LLC

State Registrations and Notice Filings

Exams

Series 65

Date: 1/22/2025

Series 66

Date: 12/7/2009

Series 63

Date: 3/18/1996

SIE

Date: 10/1/2018

Series 31

Date: 10/1/1996

Series 7

Date: 2/28/1996

Series 24

Date: 12/28/2011

Series 10

Date: 12/3/2004

FINRA

Current Firm

CETERA INVESTMENT ADVISERS LLC

Contact information

SEC notice filing (53 States and Territories)

Documents

Regulatory assets under management

Accountant surprise examination report

Red Flags

Company Information

CETERA INVESTMENT ADVISERS LLC

TRUST BUT VERIFY

Contact information

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