# GW&K INVESTMENT MANAGEMENT, LLC

GW&K INVESTMENT MANAGEMENT, LLC of BOSTON, MA is an SEC-registered investment adviser.

## Registration

- CRD: 121942
- Type: SEC-registered investment adviser
- SEC file number: 801-61559
- Location: 222 BERKELEY STREET, 15TH FLOOR, BOSTON, MA, 02116
- Phone: 617-236-8900
- Latest filing: 2026-03-26
- Regulatory AUM: $52.8B
- Discretionary AUM: $52.8B
- Clients: 177
- Accounts: 48,710

## Business model

- Compensation: % of AUM, Fixed, Performance
- Clients served: Individuals, High net worth, Pooled vehicles, Charities, Investment cos

## Officers, owners & control persons (20)

| Name | Role | Location |
| --- | --- | --- |
| THOMAS F X POWERS | CHIEF EXECUTIVE OFFICER; CO-CHIEF EXECUTIVE OFFICER | BOSTON, MA |
| HAROLD GILBERT KOTLER | FOUNDER-CHAIRMAN | BOSTON, MA |
| Iii Thomas Roberts | CO-CHIEF EXECUTIVE OFFICER | — |
| David John Rouse | CHIEF COMPLIANCE OFFICER | — |
| Brian Timothy Maguire | CHIEF FINANCIAL OFFICER | — |
| BARRETT JAMES J | DIRECTOR | — |
| BANNON KEVIN JOHN | MANAGER | — |
| PISARKIEWICZ STEVEN | EXECUTIVE VICE PRESIDENT | — |
| SIMON LAWRENCE | DIRECTOR | — |
| CONNOLLY KEVIN ARTHUR | MANAGER | — |
| COOK MARGO LYNN | DIRECTOR | — |
| KOTLER HAROLD GILBERT | CHIEF EXECUTIVE OFFICER; FOUNDER-CHAIRMAN; PRESIDENT | — |
| GANNETT BENJAMIN HAMLEN | EXECUTIVE VICE PRESIDENT/TREASURER; VICE CHAIRMAN | — |
| ROBERTS III THOMAS WILLIAMS | CO-CHIEF EXECUTIVE OFFICER; CO-PRESIDENT; CO-PRESIDENT & CHIEF COMPLIANCE OFFICER (+2 more) | — |
| POWERS THOMAS F X | CO-CHIEF EXECUTIVE OFFICER; CO-PRESIDENT | — |
| WHITE EDWARD BANKER | FIRST SENIOR VICE PRESIDENT | — |
| ANGELL NANCY GRUBER | SENIOR VICE PRESIDENT | — |
| MERRILL NEWTON P S | CHAIRMAN OF THE BOARD OF MANAGERS | — |
| ROUSE JOHN | CHIEF COMPLIANCE OFFICER | — |
| Michael Jason Clare | PRESIDENT | — |


## Related pages

- Form ADV Part 2 brochure: https://search.stillhousedata.com/firm/121942/brochure
- Similar advisers: https://search.stillhousedata.com/firm/121942/similar
- Related entities: https://search.stillhousedata.com/firm/121942/related
- SEC IAPD (source of record): https://adviserinfo.sec.gov/firm/summary/121942

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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.