# GREAT DIAMOND PARTNERS, LLC

GREAT DIAMOND PARTNERS, LLC of PORTLAND, ME is an SEC-registered investment adviser.

## Registration

- CRD: 299598
- Type: SEC-registered investment adviser
- SEC file number: 801-115058
- Location: 22 MONUMENT SQUARE, SUITE 300, PORTLAND, ME, 04101
- Phone: 207-274-2500
- Latest filing: 2026-04-17
- Regulatory AUM: $804.1M
- Discretionary AUM: $804.1M
- Clients: 12
- Accounts: 1,736

## Business model

- Compensation: % of AUM, Hourly, Fixed
- Clients served: Individuals, High net worth, Other

## Officers, owners & control persons (10)

| Name | Role | Location |
| --- | --- | --- |
| John M Piper | FOUNDING PARTNER/PORTFOLIO MANAGER/CHIEF COMPLIANCE OFFICER | — |
| Steven Edward Tenney | FOUNDING PARTNER/CHIEF EXECUTIVE OFFICER | — |
| Joseph William Powers | FOUNDING PARTNER/CHIEF PLANNING OFFICER | — |
| Helen Elizabeth Andreoli | FOUNDING PARTNER/CHIEF FINANCIAL OFFICER; MANAGING PARTNER/CHIEF FINANCIAL OFFICER | — |
| POWERS MICHAEL WILLIAM | FOUNDING PARTNER/CHIEF PLANNING OFFICER | — |
| Kupfer Corey NMN | MANAGING MEMBER | — |
| PIPER JOHN M | CHIEF COMPLIANCE OFFICER; FOUNDING PARTNER/PORTFOLIO MANAGER/CHIEF COMPLIANCE OFFICER | — |
| TENNEY STEVEN EDWARD | FOUNDING PARTNER/CHIEF EXECUTIVE OFFICER | — |
| ANDREOLI HELEN ELIZABETH | FOUNDING PARTNER/CHIEF FINANCIAL OFFICER | — |
| John Marshall Piper | FOUNDING PARTNER/PORTFOLIO MANAGER/CHIEF COMPLIANCE OFFICER | — |


## Related pages

- Form ADV Part 2 brochure: https://search.stillhousedata.com/firm/299598/brochure
- Similar advisers: https://search.stillhousedata.com/firm/299598/similar
- Related entities: https://search.stillhousedata.com/firm/299598/related
- SEC IAPD (source of record): https://adviserinfo.sec.gov/firm/summary/299598

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Source: public SEC Form ADV 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.