# WINTHROP ADVISORY GROUP, LLC

WINTHROP ADVISORY GROUP, LLC of BOSTON, MA is an SEC-registered investment adviser.

## Registration

- CRD: 288178
- Type: SEC-registered investment adviser
- SEC file number: 801-110461
- Location: 321 COLUMBUS AVE, 3RD FL, BOSTON, MA, 02116-5168
- Phone: 617-530-1010
- Latest filing: 2026-06-16
- Regulatory AUM: $3.1B
- Discretionary AUM: $3.1B
- Non-discretionary AUM: $26.9M
- Clients: 40
- Accounts: 4,369

## Business model

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

## Officers, owners & control persons (17)

| Name | Role | Location |
| --- | --- | --- |
| Ppc Richard St. Onge | CHIEF COMPLIANCE OFFICER | — |
| Mark Steven Winthrop | MANAGING MEMBER (CLASS A AND B), ELECTED MANAGER | — |
| Earl Bryan Winthrop | MANAGING MEMBER (CLASS A), ELECTED MANAGER | — |
| Lucas Alexander Winthrop | CHIEF OPERATING OFFICER, ELECTED MANAGER; TRUSTEE | — |
| Max Gustav Winthrop | CHIEF EXECUTIVE OFFICER, ELECTED MANAGER; TRUSTEE | — |
| Michael G Banchick | CHIEF TECHNOLOGY OFFICER | — |
| Andrew Joseph Murphy | CO-CHIEF INVESTMENT OFFICER | — |
| Harvey Alan Slaughter | DIRECTOR OF OPERATIONS AND CLIENT SERVICE, EXECUTIVE | — |
| MURPHY BRIAN JOSEPH | CO-CHIEF INVESTMENT OFFICER | — |
| SLAUGHTER HARVEY ALAN | DIRECTOR OF OPERATIONS AND CLIENT SERVICE, EXECUTIVE | — |
| ST ONGE PPC RICHARD CHARLES | CHIEF COMPLIANCE OFFICER | — |
| WINTHROP MARK STEVEN | MANAGING MEMBER; MANAGING MEMBER (CLASS A AND B), ELECTED MANAGER | — |
| WINTHROP AIF EARL BRYAN | MANAGING MEMBER; MANAGING MEMBER (CLASS A), ELECTED MANAGER | — |
| WINTHROP LUCAS ALEXANDER | CHIEF OPERATING OFFICER; CHIEF OPERATING OFFICER, ELECTED MANAGER; TRUSTEE | — |
| WINTHROP MAX GUSTAV | CHIEF EXECUTIVE OFFICER; CHIEF OPERATING OFFICER, ELECTED MANAGER; TRUSTEE | — |
| BANCHICK MICHAEL G | CHIEF TECHNOLOGY OFFICER | — |
| Michael G. Banchick | CHIEF TECHNOLOGY OFFICER | — |


## Related pages

- Form ADV Part 2 brochure: https://search.stillhousedata.com/firm/288178/brochure
- Similar advisers: https://search.stillhousedata.com/firm/288178/similar
- Related entities: https://search.stillhousedata.com/firm/288178/related
- SEC IAPD (source of record): https://adviserinfo.sec.gov/firm/summary/288178

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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.