Donald Riddle has been an investment adviser representative at J.M. Arbour since August 2026, and is not listed among the firm’s executive officers or direct owners. Donald Riddle holds a Bachelor of Business Administration in Finance and Marketing from Florida International University and a Master of Business Administration from Arizona State University.
J.M. Arbour, LLC is a Gardiner, ME firm with $183M under management, 720 clients and 10 advisers across 4 offices, as of its March 2026 filing.
Donald Riddle is Director of Retirement Plan Solutions at J.M. Arbour, where he leads the firm's retirement plan advisory practice for corporate clients. Working with business owners and retirement plan committees, he conducts quarterly investment reviews and oversees pricing and plan design for prospective retirement plan clients. He has more than 20 years of experience in retirement planning and wealth management, including at Vanguard, Fidelity Investments, and Merrill.
Donald Riddle’s longest registration was 10 years at Merrill Lynch, Pierce, Fenner & Smith Incorporated (2011–2022). Before joining J.M. Arbour in 2026, Donald Riddle was registered through Strategic Advisers LLC and Fidelity Personal and Workplace Advisors.
- J.M. Arbour, LLCCurrent– present · under a yearScottsdale, AZ · Adviser representative · Firm CRD 313352
- Strategic Advisers LLC– · 1 yearScottsdale, AZ · Adviser representative · Firm CRD 104555
- Fidelity Personal and Workplace Advisors– · 1 yearScottsdale, AZ · Adviser representative · Firm CRD 288590
- Merrill Lynch, Pierce, Fenner & Smith Incorporated– · 10 yearsChandler, AZ · Adviser representative · Firm CRD 7691
Investment adviser representative registrations
Donald Riddle is registered as an investment adviser representative in 2 states. Each was approved in August 2026.
- ArizonaSince 4 August 2026
- MaineSince 4 August 2026
Examinations
| Exam | Name | Passed |
|---|---|---|
| SIE | Securities Industry Essentials Examination | Credited |
| Series 66 | Uniform Combined State Law Examination | 31 October 2011 |
| Series 7 | General Securities Representative Examination | 21 July 2008 |
| Series 63 | Uniform Securities Agent State Law Examination | 1 November 2005 |
| Series 6 | Investment Company Products/Variable Contracts Representative Examination | 3 May 2005 |
- Name
- Securities Industry Essentials Examination
- Name
- Uniform Combined State Law Examination
- Name
- General Securities Representative Examination
- Name
- Uniform Securities Agent State Law Examination
- Name
- Investment Company Products/Variable Contracts Representative Examination
- Full name
- Donald R. Riddle
- CRD
- 4928406
- Firm
- J.M. Arbour · CRD 313352
- Office
- 15169 NORTH SCOTTSDALE ROAD, SUITE 205, Scottsdale, AZ 85254
- Registration
- Investment adviser registration
- In the industry since
- May 2007
- Disciplinary history
- Not yet shown here · SEC record
- Firm bio
- jmarbour.com
Where does Donald Riddle work?
Donald Riddle is an investment adviser representative registered through J.M. Arbour, LLC since August 2026, and is not listed among the firm’s executive officers or direct owners.
Is Donald Riddle a financial advisor?
Yes. Donald Riddle has a current investment-adviser registration in Arizona and Maine, through J.M. Arbour since August 2026.
How many years of experience does Donald Riddle have?
Donald Riddle has 19 years in the financial industry, since May 2007, across 4 adviser firms.
What exams has Donald Riddle passed?
Donald Riddle has passed 4 licensing exams: the Series 6, Series 63, Series 7 and Series 66. The earliest, the Series 6, was passed in May 2005. FINRA credited Donald Riddle with the SIE, which began in October 2018.
Where did Donald Riddle work before J.M. Arbour?
Before J.M. Arbour, Donald Riddle was registered through Strategic Advisers LLC, March 2025 to April 2026; Fidelity Personal and Workplace Advisors, July 2023 to March 2025; Merrill Lynch, Pierce, Fenner & Smith Incorporated, November 2011 to May 2022.
Where is Donald Riddle based?
Donald Riddle’s registered office is in Scottsdale, AZ.
Is Donald Riddle registered with FINRA?
No. Donald Riddle has no current broker registration.
How can I verify Donald Riddle’s record?
Search CRD 4928406 on the SEC’s adviser search (adviserinfo.sec.gov), which publishes Donald Riddle’s full registration record.
