Len Rittberg has been an investment adviser representative at DMC Group since September 2023, and is not listed among the firm’s executive officers or direct owners. Len Rittberg holds an MBA from Yale University and a Bachelor of Science in Finance and Marketing from the University of Virginia McIntire School of Commerce.
DMC Group, LLC is a Birmingham, AL firm with $177M under management, 108 clients and 3 advisers in one office, as of its March 2026 filing.
Len Rittberg's primary responsibility at Greybox Investments is portfolio strategy, security selection and customized investment implementation. He has spent over two decades as a sector analyst and portfolio manager for institutional clients. Most recently he was Director and Senior Portfolio Manager for equity investments at Pluribus Labs, a quantitative hedge fund, and earlier held senior portfolio management roles at Adelante Capital Management and Jurika & Voyles.
- Greybox InvestmentsCurrent– present · 3 yearsFt. Lauderdale, FL · Adviser representative · Firm CRD 174077
Professional designations
Listed by DMC Group
- Chartered Financial Analyst (CFA)
Investment adviser representative registrations
Len Rittberg is registered as an investment adviser representative in 2 states. Each was approved in September 2023.
- AlabamaSince 7 September 2023
- FloridaSince 19 September 2023
Examinations
| Exam | Name | Passed |
|---|---|---|
| Series 86 | Research Analyst Exam - Part I Analysis Module | 6 January 2007 |
| Series 87 | Research Analyst Exam - Part II Regulations Module | 6 December 2005 |
| Series 63 | Uniform Securities Agent State Law Examination | 25 October 2005 |
| Series 7 | General Securities Representative Examination | 12 October 2005 |
- Name
- Research Analyst Exam - Part I Analysis Module
- Name
- Research Analyst Exam - Part II Regulations Module
- Name
- Uniform Securities Agent State Law Examination
- Name
- General Securities Representative Examination
- Full name
- Len Phillip Rittberg
- CRD
- 5035665
- Firm
- DMC Group · CRD 174077
- Office
- Ft. Lauderdale, FL
- Registration
- Investment adviser registration
- In the industry since
- September 2023
- Disciplinary history
- Not yet shown here · SEC record
- Firm bio
- greyboxinvestments.com
Where does Len Rittberg work?
Len Rittberg is an investment adviser representative registered through DMC Group, LLC since September 2023, and is not listed among the firm’s executive officers or direct owners.
Is Len Rittberg a financial advisor?
Yes. Len Rittberg has a current investment-adviser registration in Alabama and Florida, through DMC Group since September 2023.
How many years of experience does Len Rittberg have?
Len Rittberg has 3 years in the financial industry, since September 2023, across 1 adviser firm.
What exams has Len Rittberg passed?
Len Rittberg has passed 4 licensing exams: the Series 7, Series 63, Series 87 and Series 86. The earliest, the Series 7, was passed in October 2005.
Where is Len Rittberg based?
Len Rittberg’s registered office is in Ft. Lauderdale, FL.
Is Len Rittberg registered with FINRA?
No. Len Rittberg has no current broker registration.
Is Len Rittberg a CFA charterholder?
DMC Group lists Len Rittberg with the CFA credential (“Chartered Financial Analyst (CFA)”) on its website. CFA Institute confirms certification status.
How can I verify Len Rittberg’s record?
Search CRD 5035665 on the SEC’s adviser search (adviserinfo.sec.gov), which publishes Len Rittberg’s full registration record.
