# JACK ARMSTRONG DERBY

JACK ARMSTRONG DERBY is an investment adviser representative (IAR) with state registration records since 1999, appearing at 4 firms. Currently registered with CAMBRIDGE INVESTMENT RESEARCH ADVISORS, INC..

## Registration history (4)

| Firm | From | To | Current |
| --- | --- | --- | --- |
| [CAMBRIDGE INVESTMENT RESEARCH ADVISORS, INC.](https://search.stillhousedata.com/firm/134139) | 2008-07-28 | present | Yes |
| [CETERA ADVISORS LLC](https://search.stillhousedata.com/firm/10299) | 2007-12-17 | 2008-06-27 | — |
| [MML INVESTORS SERVICES, LLC](https://search.stillhousedata.com/firm/10409) | 2003-05-28 | 2005-01-25 | — |
| [WS GRIFFITH SECURITIES, INC.](https://search.stillhousedata.com/firm/10410) | 1999-01-01 | 2003-05-23 | — |

## More

- [This representative on SEC IAPD (source of record)](https://adviserinfo.sec.gov/individual/summary/2643058)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/rep/2643058.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.