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William Joseph Sullivan Iii

NEXT LEVEL PRIVATE
Milton, MA
·CRD# 4724048·13 years experience

Professional Summary

William Joseph Sullivan III, who also goes by William J Sullivan, is a registered financial advisor currently at NEXT LEVEL PRIVATE LLC located in Milton, Massachusetts. William is registered as an IAR (Investment Advisor Representative) and started their career in finance in 2000. William has worked at 4 firms.

At a Glance

Always Fiduciary

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Other Aliases

William J Sullivan

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

13 years in the financial services industry

Current & Past Employments

NEXT LEVEL PRIVATE LLC·CRD# 313247
RIA
30 Central Avenue, Milton, MA 02186
August 3, 2022 - Present
LEXINGTON WEALTH MANAGEMENT, INC.·CRD# 135507
RIA
Lexington, MA
June 20, 2005 - April 14, 2009
LEXINGTON/BRIDGEWATER WEALTH MANAGEMENT, LLC·CRD# 132068
RIA
Lexington, MA
October 26, 2004 - November 22, 2005
LEXINGTON ADVISORS·CRD# 128683
RIA
Lexington , MA
January 1, 2000 - December 31, 2004

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Current Firm

NL
NEXT LEVEL PRIVATE LLC

NEXT LEVEL PRIVATE LLC | NEXT LEVEL WEALTHCARE LLC

CRD#: 313247 / SEC#: 801-122122
RIA
Registered Investment Advisory firm - SEC (8/18/2021 Approved)

Contact Information

Main Address

500 Mamaroneck Avenue Suite 501, Harrison, NY 10528

Phone Number

(914) 431-5255

# of Employees

16

SEC notice filing (17 States and Territories)

Registered to provide investment advisory services in 17 US states and territories.

Documents

Customer Relationship Summary (CRS / SEC)Latest Form ADV

Part 2 Brochures

NEXT LEVEL DISCLOSURE BROCHURE AND BROCHURE SUPPLEMENTS (7/23/2026)

Regulatory Assets Under Management

Total Number of Accounts

2,693

AUM (Assets Under Management)

$1,369,973,000

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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). William Sullivan Insurance Agency. Insurance services; full time. 2). Milton-Fuller Housing Agency. Non-investment related. Milton, MA. Board member of an over 55 housing community. 4 HRS/MONTH. 0 HOURS DURING TRADING HOURS. While there is no direct compensation for this role, the insurance company that Mr. Sullivan has a 25% ownership in insures all of the buildings for the Milton-Fuller Housing Agency.

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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".
NL
NEXT LEVEL PRIVATE LLC

NEXT LEVEL PRIVATE LLC | NEXT LEVEL WEALTHCARE LLC

CRD#: 313247 / SEC#: 801-122122
RIA
Registered Investment Advisory firm - SEC (8/18/2021 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
Massachusetts
(8/3/2022)

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.

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CRS (Client Relationship Summary) - RIA

Click below to view William Joseph Sullivan III's CRS (Customer Relationship Summary).

CRS (Customer Relationship Summary)

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