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John Williams, portrait

John Williams

Managing Partner & Co-Founder at Quadrant Capital Group in Cincinnati, OH

Investment adviser registrationUpdated

John Williams is Managing Partner & Co-Founder of Quadrant Capital Group LLC, an investment adviser managing $5.4B, and works from its Cincinnati, OH office. John Williams has been registered as an investment adviser representative through Quadrant Capital Group since 20 December 2010, has 19 years in the industry across 3 firms and has passed the Series 7, Series 63 and Series 66.

19
Years in industry
15
Years at firm
3
Adviser firms
1
States registered

From the IAPD record, checked 22 October 2026SEC record

Career

John Williams has been Managing Partner & Co-Founder of Quadrant Capital Group since August 2008, is a control person of the firm and directly owns between 25% and 50% of it. John Williams studied at Vanderbilt University.

Quadrant Capital Group LLC is a Cincinnati, OH firm with $5.4B under management, 417 clients and 20 advisers across 2 offices, as of its July 2026 filing.

John Williams is Managing Partner and Co-Founder, Chief Advisory Officer of Constellation Wealth Advisors. He leads the company's advisory team and has worked in the wealth management industry since 1995. Previously, he held portfolio management and advisory positions at Sanford Bernstein, PNC Bank and Fifth Third Bank. He is Treasurer of the United Way of Greater Cincinnati Foundation Board.

John Williams’ longest registration is the current one, 15 years at Quadrant Capital Group since 2010. Before joining Quadrant Capital Group in 2010, John Williams was registered through Fifth Third Securities, Inc.

  1. Constellation Wealth Advisors, LLC
    – · 2 years
    Cincinnati, OH · Adviser representative · Firm CRD 289860
  2. – present · 15 years
    Cincinnati, OH · Adviser representative · Firm CRD 147253
  3. Fifth Third Securities, Inc.
    – · 3 years
    Cincinnati, OH · Adviser representative · Firm CRD 628

Credentials and registrations

Professional designations

Listed by Quadrant Capital Group

  • CFA

Investment adviser representative registrations

John Williams is registered as an investment adviser representative in Ohio, since December 2010.

  • OhioSince 20 December 2010

Examinations

Series 664 May 2005
Name
Uniform Combined State Law Examination
Series 633 January 1996
Name
Uniform Securities Agent State Law Examination
Series 727 December 1995
Name
General Securities Representative Examination

Key facts

Full name
John Marshall Williams
CRD
2669535
Firm
Quadrant Capital Group · CRD 147253
Role
Managing Partner & Co-Founder
Office
255 EAST FIFTH ST., SUITE 3000, Cincinnati, OH 45202
Registration
Investment adviser registration
In the industry since
August 2007
Disciplinary history
Not yet shown here · SEC record

Common questions

Where does John Williams work?

John Williams has been Managing Partner & Co-Founder of Quadrant Capital Group LLC since August 2008, and is a control person of the firm.

Source: Form ADV, Schedule A, filed 30 July 2026

Is John Williams a financial advisor?

Yes. John Williams has a current investment-adviser registration in Ohio, through Quadrant Capital Group since December 2010.

Source: IAPD individual record, checked 22 October 2026

How many years of experience does John Williams have?

John Williams has 19 years in the financial industry, since August 2007, across 3 adviser firms.

Source: IAPD individual record, checked 22 October 2026

What exams has John Williams passed?

John Williams has passed 3 licensing exams: the Series 7, Series 63 and Series 66. The earliest, the Series 7, was passed in December 1995.

Source: IAPD individual record, checked 22 October 2026

Where did John Williams work before Quadrant Capital Group?

Before Quadrant Capital Group, John Williams was registered through Fifth Third Securities, Inc., March 2005 to June 2008.

Source: IAPD individual record, checked 22 October 2026

Where is John Williams based?

John Williams’ registered office is in Cincinnati, OH.

Source: IAPD individual record, checked 22 October 2026

Is John Williams registered with FINRA?

No. John Williams has no current broker registration.

Source: IAPD individual record, checked 22 October 2026

Is John Williams a CFA charterholder?

Quadrant Capital Group lists John Williams with the CFA credential (“CFA”) on its website. CFA Institute confirms certification status.

Source: John Williams, CFA biography, constellation-wealth.com

How can I verify John Williams’ record?

Search CRD 2669535 on the SEC’s adviser search (adviserinfo.sec.gov), which publishes John Williams’ full registration record.

Source: IAPD individual record, checked 22 October 2026

Leadership at Quadrant Capital Group

Sources

  1. IAPD individual record, CRD 2669535, checked 22 October 2026. Registration status, employment history and examinations.
  2. Form ADV Part 1A, Schedules A and B of Quadrant Capital Group LLC, filed 30 July 2026. Title, control and ownership bands.
  3. Quadrant Capital Group team page. Biography, education, credentials, awards and the portrait, reproduced for identification.