James Detwiler has been Managing Member/President/Chief Compliance Officer of Barnstone Advisors since April 2007, is a control person of the firm and directly owns between 50% and 75% of it. James Detwiler holds a B.S. in Economics from Grinnell College and an M.B.A. from Emory University.
Barnstone Advisors LLC is a Phoenixville, PA firm with $241M under management, 90 clients and 3 advisers across 2 offices, as of its January 2026 filing.
Brint Detwiler is President of Barnstone Advisors, which he founded in 2006. He previously worked as a senior financial consultant with KPMG in Philadelphia, then spent 16 years operating and growing AutoPort North America, a vehicle export services company, as CEO and major shareholder, before its sale to a publicly held multinational holding company. He has since worked with venture capital firms as an active and passive investor.
- Barnstone Advisors LLCCurrent– present · 19 yearsPhoenixville, PA · Adviser representative · Firm CRD 144511
Investment adviser representative registrations
James Detwiler is registered as an investment adviser representative in 2 states. The first approvals date from September 2007; the most recent is Georgia, in June 2021.
- GeorgiaSince 9 June 2021
- PennsylvaniaSince 17 September 2007
Examinations
| Exam | Name | Passed |
|---|---|---|
| Series 65 | Uniform Investment Adviser Law Examination | 21 May 2007 |
- Name
- Uniform Investment Adviser Law Examination
- Full name
- James Brinton Detwiler
- CRD
- 5374270
- Firm
- Barnstone Advisors · CRD 144511
- Role
- Managing Member/President/Chief Compliance Officer
- Office
- 388 W. POTHOUSE ROAD, Phoenixville, PA 19460
- Registration
- Investment adviser registration
- In the industry since
- September 2007
- Disciplinary history
- Not yet shown here · SEC record
- Firm bio
- barnstoneadvisors.com
Where does James Detwiler work?
James Detwiler has been Managing Member/President/Chief Compliance Officer of Barnstone Advisors LLC since April 2007, and is a control person of the firm.
Is James Detwiler a financial advisor?
Yes. James Detwiler has a current investment-adviser registration in Georgia and Pennsylvania, through Barnstone Advisors since September 2007.
How many years of experience does James Detwiler have?
James Detwiler has 19 years in the financial industry, since September 2007, across 1 adviser firm.
What exams has James Detwiler passed?
James Detwiler passed the Series 65 in May 2007.
Where is James Detwiler based?
James Detwiler’s registered office is in Phoenixville, PA.
Is James Detwiler registered with FINRA?
No. James Detwiler has no current broker registration.
How can I verify James Detwiler’s record?
Search CRD 5374270 on the SEC’s adviser search (adviserinfo.sec.gov), which publishes James Detwiler’s full registration record.
