Sean O'Brien has been an investment adviser representative at Echo45 Advisors since June 2026, and is not listed among the firm’s executive officers or direct owners.
Echo45 Advisors LLC is a Walnut Creek, CA firm with $227M under management, 201 clients and 4 advisers in one office, as of its September 2026 filing.
Sean O'Brien’s longest registration was 13 years at Merrill Lynch, Pierce, Fenner & Smith Incorporated (2006–2019). Before joining Echo45 Advisors in 2026, Sean O'Brien was registered through The Salvetti Group and Raymond James Financial Services Advisors, Inc.
- Echo45 Advisors LLCCurrent– present · under a yearWalnut Creek, CA · Adviser representative · Firm CRD 307265
- The Salvetti Group– · 3 yearsSacramento, CA · Adviser representative · Firm CRD 324974
- Raymond James Financial Services Advisors, Inc– · 4 yearsSacramento, CA · Adviser representative · Firm CRD 149018
- Merrill Lynch, Pierce, Fenner & Smith Incorporated– · 13 yearsSacramento, CA · Adviser representative · Firm CRD 7691
Investment adviser representative registrations
Sean O'Brien is registered as an investment adviser representative in California, since June 2026.
- CaliforniaSince 18 June 2026
Examinations
| Exam | Name | Passed |
|---|---|---|
| SIE | Securities Industry Essentials Examination | Credited |
| Series 66 | Uniform Combined State Law Examination | 29 December 2005 |
| Series 7 | General Securities Representative Examination | 26 October 2005 |
- Name
- Securities Industry Essentials Examination
- Name
- Uniform Combined State Law Examination
- Name
- General Securities Representative Examination
- Full name
- Sean Michael O'Brien
- CRD
- 5012235
- Firm
- Echo45 Advisors · CRD 307265
- Office
- 1802 TICE VALLEY BLVD, Walnut Creek, CA 94595
- Registration
- Investment adviser registration
- In the industry since
- October 2005
- Disciplinary history
- Not yet shown here · SEC record
Where does Sean O'Brien work?
Sean O'Brien is an investment adviser representative registered through Echo45 Advisors LLC since June 2026, and is not listed among the firm’s executive officers or direct owners.
Is Sean O'Brien a financial advisor?
Yes. Sean O'Brien has a current investment-adviser registration in California, through Echo45 Advisors since June 2026.
How many years of experience does Sean O'Brien have?
Sean O'Brien has 20 years in the financial industry, since October 2005, across 4 adviser firms.
What exams has Sean O'Brien passed?
Sean O'Brien has passed 2 licensing exams: the Series 7 and Series 66. The earliest, the Series 7, was passed in October 2005. FINRA credited Sean O'Brien with the SIE, which began in October 2018.
Where did Sean O'Brien work before Echo45 Advisors?
Before Echo45 Advisors, Sean O'Brien was registered through Raymond James Financial Services Advisors, Inc, April 2019 to July 2023; Merrill Lynch, Pierce, Fenner & Smith Incorporated, January 2006 to April 2019.
Where is Sean O'Brien based?
Sean O'Brien’s registered office is in Walnut Creek, CA.
Is Sean O'Brien registered with FINRA?
No. Sean O'Brien has no current broker registration.
How can I verify Sean O'Brien’s record?
Search CRD 5012235 on the SEC’s adviser search (adviserinfo.sec.gov), which publishes Sean O'Brien’s full registration record.
- David ReichertChief Compliance Officer
Jon HendersonFounder and Chief Investment Officer