Keith Feinberg has been COO and CCO of Five Eleven Family Office since November 2024, is a control person of the firm and directly owns under 5% of it. Keith Feinberg holds a JD from St. John's University School of Law and a Honors BA in Political Science and History from the University of Delaware.
Five Eleven Family Office LLC is a Garden City, NY firm with $163M under management, 5 clients and 4 advisers across 2 offices, as of its July 2026 filing.
Keith Feinberg is Partner and Chief Wealth Strategist of Five Eleven Partners. He advises families on financial, tax and estate planning matters while overseeing operations and compliance. Before joining the firm, he was COO and Chief Wealth Strategist at Seven Mile Advisory, and his earlier roles included Principal at Cerity Partners and Financial Advisor at Altfest Personal Wealth Management. His career began in private practice as a trust and estate attorney.
Keith Feinberg’s longest registration was 1 year at Seven Mile Advisory LLC (2023–2024). Before joining Five Eleven Family Office in 2025, Keith Feinberg was registered through Seven Mile Advisory LLC and Mariner Platform Solutions.
- Five Eleven PartnersCurrent– present · 1 yearNew York, NY · Adviser representative · Firm CRD 334002
- Seven Mile Advisory LLC– · 1 yearGarden City, NY · Adviser representative · Firm CRD 324114
- Mariner Platform Solutions– · under a yearLittle Silver, NJ · Adviser representative · Firm CRD 305418
- Cerity Partners LLC– · under a yearNew York, NY · Adviser representative · Firm CRD 151559
Professional designations
Listed by Five Eleven Family Office
- Certified Financial Planner (CFP®)
Investment adviser representative registrations
Keith Feinberg is registered as an investment adviser representative in New York, since May 2025.
- New YorkSince 21 May 2025
Examinations
No examinations are on Keith Feinberg’s record.
- Full name
- Keith J. Feinberg
- CRD
- 7394452
- Firm
- Five Eleven Family Office · CRD 334002
- Role
- COO and CCO
- Office
- 1044 Franklin Avenue, Suite 205, New York, NY 11530
- Registration
- Investment adviser registration
- In the industry since
- December 2021
- Disciplinary history
- Not yet shown here · SEC record
- Firm bio
- five11partners.com
Where does Keith Feinberg work?
Keith Feinberg has been COO and CCO of Five Eleven Family Office LLC since November 2024, and is a control person of the firm.
Is Keith Feinberg a financial advisor?
Yes. Keith Feinberg has a current investment-adviser registration in New York, through Five Eleven Family Office since May 2025.
How many years of experience does Keith Feinberg have?
Keith Feinberg has 4 years in the financial industry, since December 2021, across 4 adviser firms.
Where did Keith Feinberg work before Five Eleven Family Office?
Before Five Eleven Family Office, Keith Feinberg was registered through Seven Mile Advisory LLC, March 2023 to November 2024; Mariner Platform Solutions, April 2022 to March 2023; Cerity Partners LLC, June 2021 to April 2022.
Where is Keith Feinberg based?
Keith Feinberg’s registered office is in New York, NY.
Is Keith Feinberg registered with FINRA?
No. Keith Feinberg has no current broker registration.
Is Keith Feinberg a CFP?
Five Eleven Family Office lists Keith Feinberg with the CFP credential (“Certified Financial Planner (CFP®)”) on its website. CFP Board confirms certification status.
How can I verify Keith Feinberg’s record?
Search CRD 7394452 on the SEC’s adviser search (adviserinfo.sec.gov), which publishes Keith Feinberg’s full registration record.
