John A. Costello

ESSEX FINANCIAL SERVICES

Farmington, CT 06032

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CRD#: 7310070

Professional summary

John Allyn Costello, who also goes by John Allyn Costello, is a registered financial advisor currently at ESSEX FINANCIAL SERVICES, INC. located in Farmington, Connecticut.

John is registered as an IAR (Investment Advisor Representative) and started their career in finance in 2022. John has worked at 4 firms and has passed the Series 65 exam.

Question & Answer

Are you a "fiduciary"?

Yes

Aliases

John Allyn Costello

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.

The advisor shows no other business activity.

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view John Allyn Costello'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®

None

Experience

Current

March 2, 2026 - Present

ESSEX FINANCIAL SERVICES, INC.

Office #1: 10 Waterside Dr Suite 100, Farmington, CT 06032

RIA

CRD#: 127549

Farmington, CT

Past

May 16, 2025 - February 23, 2026

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

RIA

CRD#: 116407

HARTFORD, CT

Past

June 14, 2023 - May 19, 2025

MARCUM WEALTH, LLC

RIA

CRD#: 134628

Hartford, CT

Past

May 16, 2022 - May 23, 2023

ADVICEONE ADVISORY SERVICES, LLC

RIA

CRD#: 111614

GLASTONBURY, CT

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".

ESSEX FINANCIAL SERVICES, INC.

ESSEX FINANCIAL | ESSEX FINANCIAL SERVICES, INC.

CRD#: 127549 / SEC#: 801-62242, 8-66015

RIA

Registered Investment Advisory firm - SEC (8/7/2003 Approved)

Terminated by SEC on 08/01/2021

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.

Highlighted states indicate IAR registrations

IAR

Connecticut
(3/2/2026)

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.

Exams

State Security Law Exam

IAR

Series 65

Date: 5/14/2022

Uniform Investment Adviser Law Examination

Current Firm

ESSEX FINANCIAL SERVICES, INC.

ESSEX FINANCIAL | ESSEX FINANCIAL SERVICES, INC.

CRD#: 127549 / SEC#: 801-62242, 8-66015

RIA

Registered Investment Advisory firm - SEC (8/7/2003 Approved)

Terminated by SEC on 08/01/2021

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Contact information

Main Address

176 Westbrook Road, Essex, CT 06426

Mailing Address

Phone number

(860) 767-4300

Established

Connecticut since 04/24/2003

Firm type

Corporation

Fiscal year end

September

# of Employees

SEC notice filing (28 States and Territories)

Documents

Customer Relationship Summary (CRS / SEC)

Latest Form ADV

Part 2 Brochures

ESSEX FINANCIAL FORM ADV PART 2A (12/23/2025)

Direct owners and executive officers

Name	Position	CRD#
ESSEX SAVINGS BANK	SHAREHOLDER
BAUER, JOHN	DIRECTOR	7031583
BOONE, MARY EMELIA	DIRECTOR	6281326
CUMELLO, CHARLES ROBERT JR	PRESIDENT & CEO, DIRECTOR	2120572
GLOWAC, BRUCE MICHAEL	DIRECTOR
GRESHAM, STEPHEN DEANE	DIRECTOR	1126592
JACOBSON, GEOFFREY LEE	DIRECTOR
NELSON, RONALD CLARK	CHIEF OPERATING OFFICER, TREASURER, SECRETARY	1137618
OROURKE, MICHAEL DENNIS	CHIEF COMPLIANCE OFFICER	1551838
PAUL, DOUGLAS WILLIAMS	CHAIRMAN
SHOOK, GREGORY RALPH	DIRECTOR
TERRIBILE, WILLIAM JOHN JR	FINANCIAL AND OPERATIONS PRINCIPAL, ROSFP	1132498

Regulatory assets under management

Total Number of Accounts	7,143
AUM (Assets Under Management)	$ 4,169,984,114

Disclosures

Regulatory Event

Accountant surprise examination report

Filing Date	Form ADV-E Cover	Form ADV-E Report
08/22/2025	Cover Page	Report
11/07/2024	Cover Page	Report
10/12/2023	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.

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John A. Costello

Professional summary

Question & Answer

Aliases

Other business activities

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view John Allyn Costello's CRS (Customer Relationship Summary).

Certified licenses

Experience

ESSEX FINANCIAL SERVICES, INC.

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

MARCUM WEALTH, LLC

ADVICEONE ADVISORY SERVICES, LLC

Primary Firm SEC Registration

ESSEX FINANCIAL SERVICES, INC.

State Registrations and Notice Filings

Exams

Series 65

Date: 5/14/2022

Current Firm

ESSEX FINANCIAL SERVICES, INC.

Contact information

SEC notice filing (28 States and Territories)

Documents

Part 2 Brochures

Direct owners and executive officers

Regulatory assets under management

Disclosures

Accountant surprise examination report

Red Flags

Company Information

ESSEX FINANCIAL SERVICES, INC.

TRUST BUT VERIFY

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