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William Sinclair Cummings

J.M. ARBOUR
GARDINER, ME
·CRD# 6800327·9 years experience

Professional Summary

William Sinclair Cummings, who also goes by William Cummings, is a registered financial advisor currently at J.M. ARBOUR, LLC located in Gardiner, Maine. William is registered as an IAR (Investment Advisor Representative) and started their career in finance in 2017. William has worked at 3 firms and has passed the Series 65, Series 66, Series 63, SIE and Series 7 exams.

At a Glance

Always Fiduciary

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Other Aliases

William Cummings

Blog Corner

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Videos & Posts

This advisor has not added any videos or posts yet.

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Contact Information

This advisor has not claimed their profile yet, so there is no contact information to display at this time.

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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

9 years in the financial services industry

Current & Past Employments

J.M. ARBOUR, LLC·CRD# 313352
RIA
1 Brunswick Avenue, Gardiner, ME 04345
June 24, 2022 - Present
FOUNDATIONS INVESTMENT ADVISORS LLC·CRD# 175083
RIA
Hallowell, ME
December 23, 2020 - August 4, 2022
EQUITABLE ADVISORS, LLC·CRD# 6627
RIA
Rochester, NY
February 12, 2020 - April 22, 2020
EQUITABLE ADVISORS, LLC·CRD# 6627
BD
Rochester, NY
June 8, 2017 - April 22, 2020

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Current Firm

JA
J.M. ARBOUR, LLC

J.M. ARBOUR LLC | J.M. ARBOUR, LLC | J.M. ARBOUR WEALTH MANAGEMENT | J.M. ARBOUR MULTI-FAMILY OFFICE

CRD#: 313352 / SEC#: 801-124962
RIA
Registered Investment Advisory firm - SEC (5/6/2022 Approved)

Contact Information

Main Address

1 Brunswick Avenue, Gardiner, ME 04345

Phone Number

(207) 248-6767

# of Employees

12

SEC notice filing (6 States and Territories)

Registered to provide investment advisory services in 6 US states and territories.

Documents

Customer Relationship Summary (CRS / SEC)Latest Form ADV

Part 2 Brochures

J.M. ARBOUR, LLC FORM ADV PART 2 BROCHURE (3/31/2026)

Regulatory Assets Under Management

Total Number of Accounts

1,253

AUM (Assets Under Management)

$183,158,509

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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.

1.) INSURANCE SALES; INVESTMENT-RELATED; GARDINER, MAINE; INSURANCE AGENT; 2020; APPROXIMATELY 30 HRS/MO DURING TRADING HOURS; SALES OF VARIOUS INSURANCE PRODUCTS. 2.) W. Sinclair Holdings LLC; Not investment-related; China, ME 04358; Nature: Benefit counseling; Position: President/Founder; Title: Sole member LLC, President/Founder; Start date: 01/24/2025; Approximately 4 hours/month will be devoted to this activity with 0 hours/month during securities trading hours; Duties: various business consulting services.

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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".
JA
J.M. ARBOUR, LLC

J.M. ARBOUR LLC | J.M. ARBOUR, LLC | J.M. ARBOUR WEALTH MANAGEMENT | J.M. ARBOUR MULTI-FAMILY OFFICE

CRD#: 313352 / SEC#: 801-124962
RIA
Registered Investment Advisory firm - SEC (5/6/2022 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.
IAR
Maine
(6/24/2022)

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

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 Apr 2022About the Series 65 exam

Series 66 — Uniform Combined State Law Examination

Passed Feb 2020About the Series 66 exam

Series 63 — Uniform Securities Agent State Law Examination

Passed Aug 2017About the Series 63 exam

SIE — Securities Industry Essentials Examination

Passed Oct 2018About the SIE exam

Series 7 — General Securities Representative Examination

Passed Jun 2017About the Series 7 exam

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CRS (Client Relationship Summary) - RIA

Click below to view William Sinclair Cummings's CRS (Customer Relationship Summary).

CRS (Customer Relationship Summary)

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