Clients
GW&K Investment Management serves 48,710 clients, 47,749 of them high-net-worth individuals. The average client has about $1.1 million with the firm, and high-net-worth clients hold 77% of its $52.8 billion in assets.
- High-net-worth individuals47,749 clients77%
- Investment companies17 clients9%
- Pooled investment vehicles14 clients6%
- Corporations and other businesses776 clients6%
- OtherBanking or thrift institutions, Pension and profit-sharing plans, State or municipal government entities, Sovereign wealth funds and foreign official institutions3%
What it does
GW&K Investment Management provides financial planning, portfolio management for individuals and small businesses, portfolio management for investment companies, portfolio management for pooled vehicles, portfolio management for institutions and selecting other managers. It is paid through a percentage of assets, fixed fees and performance-based fees.
GW&K Investment Management provided financial planning to 51–100 clients last fiscal year and advises 3 private funds.
100.0% of assets ($52.78B across 48,710 accounts) are managed with discretion. $32.45B sits in a wrap fee program the firm both sponsors and manages. 1% of clients are outside the U.S., and 26 clients received advice without assets under management last fiscal year.
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| Client type | Clients | Regulatory AUM | Share | Avg. per client |
|---|---|---|---|---|
| High-net-worth individuals | 47,749 | $40,390,650,819 | 76.5% | $846K |
| Banking or thrift institutions | 17 | $312,237,818 | 0.6% | $18.4M |
| Investment companies | 17 | $4,932,075,975 | 9.3% | $290.1M |
| Pooled investment vehicles | 14 | $3,004,683,173 | 5.7% | $214.6M |
| Pension and profit-sharing plans | 123 | $707,676,146 | 1.3% | $5.75M |
| State or municipal government entities | 13 | $294,311,138 | 0.6% | $22.6M |
| Sovereign wealth funds and foreign official institutions | 1 | $20,365,707 | 0.0% | $20.4M |
| Corporations and other businesses | 776 | $3,120,947,408 | 5.9% | $4.02M |
| Total | 48,710 | $52,782,948,184 | 100% | $1.08M |
- Regulatory AUM
- $40,390,650,819
- Share
- 76.5%
- Avg. per client
- $846K
- Regulatory AUM
- $312,237,818
- Share
- 0.6%
- Avg. per client
- $18.4M
- Regulatory AUM
- $4,932,075,975
- Share
- 9.3%
- Avg. per client
- $290.1M
- Regulatory AUM
- $3,004,683,173
- Share
- 5.7%
- Avg. per client
- $214.6M
- Regulatory AUM
- $707,676,146
- Share
- 1.3%
- Avg. per client
- $5.75M
- Regulatory AUM
- $294,311,138
- Share
- 0.6%
- Avg. per client
- $22.6M
- Regulatory AUM
- $20,365,707
- Share
- 0.0%
- Avg. per client
- $20.4M
- Regulatory AUM
- $3,120,947,408
- Share
- 5.9%
- Avg. per client
- $4.02M
What the accounts hold
- Stocks22%
- Funds1%
- Bonds75%
- State and local bonds63%
- Investment grade corporate bonds5%
- U.S. government and agency bonds4%
- High-yield corporate bonds2%
- Sovereign bonds1%
- Cash2%
Custodians
GW&K Investment Management’s client accounts are held mainly at Merrill Lynch, Pierce, Fenner & Smith, with 23% of managed assets, and Charles Schwab, with 20%. GW&K Investment Management has custody of client assets.
- Charles SchwabCharles Schwab & Co., Inc. · Westlake, TX · $10.66B20%
- Merrill Lynch, Pierce, Fenner & SmithMerrill Lynch, Pierce, Fenner & Smith Incorporated · New York, NY · $12.08B23%
- All other custodians$30.04B57%
Ownership and leadership
Amg Boston Holdings, LLC owns 50% to 75% of GW&K Investment Management, and Thomas Powers is its CEO.
- Owns 50% to 75% of GW&K Investment Management, LLC
Amg Boston Holdings, LLC
since October 2008
- Owns 75% or more of Amg Boston Holdings, LLC
Amg GWK Holdings, LLC
Control person · since September 2014
- Owns 75% or more of Amg GWK Holdings, LLC
Affiliated Managers Group, Inc.
Control person · since June 2014
- Owns 5% to 10% of GW&K Investment Management, LLC
Thomas Powers
Control person · since June 2022
Leadership
- Thomas PowersChief Executive Officer
- Michael ClarePresident
- Brian MaguireChief Financial Officer
- David RouseChief Compliance Officer
- Harold KotlerFounder- Chairman
Staff
- 177 employees
- 63 in advisory functions
- 10 state-registered reps
- 39 broker-dealer reps
- 4 soliciting firms
Reported holdings
GW&K Investment Management’s reported 13F holdings total $12.8M across 1,109 positions, and the ten largest make up 12.7% of it.
- $12.8M
- Reported 13F value
- 1,109
- Positions
- 12.7%
- In the 10 largest
- +12.8%
- Value vs. prior quarter
- Macom Technology Solutions H1.9%
- Advanced Energy Industries1.7%
- Spx Technologies Inc.1.4%
- Sterling Infrastructure Inc.1.3%
- Itt Inc.1.2%
- Novanta Inc.1.1%
- Rbc Bearings Inc.1.1%
- Moog Inc.-class A1.0%
- Entegris Inc.1.0%
- Api Group Corp.1.0%
Together, the ten largest are 12.7% of reported value.
A 13F covers only exchange-traded long positions the firm holds with discretion, so this $12.8M is not its $52.78B in regulatory assets and does not represent any individual client's portfolio.
Fees
GW&K Investment Management is paid through a percentage of assets under management, fixed fees (other than subscription fees) and performance-based fees.
GW&K Investment Management’s fee rates are not included in this profile. Read its fee schedule in its SEC-filed brochure.
Offices and registrations
Besides its headquarters, GW&K Investment Management has 0 offices, with 1 listed address in 1 state.
Massachusetts · 1 listed address
- 222 Berkeley Street, 15th Floor, BostonHQ
Registration details
- Legal name
- GW&K Investment Management, LLC
- Headquarters
- 222 Berkeley Street, 15th Floor, Boston, MA 02116
- Phone
- 617-236-8900
- Website
- www.gwkinvest.com
- SEC file
- 801-61559
- Founded
- 1974
- Structure
- Delaware LLC
- Fiscal year end
- December
This directory does not report disciplinary history, for any firm or individual, in either direction. The SEC publishes the complete record, including any disciplinary events, and it is the authoritative place to check one. See this firm's record on adviserinfo.sec.gov
Common questions
How many clients does GW&K Investment Management have?
GW&K Investment Management has 48,710 clients and manages $52.8 billion for them, as of March 2026. They include 47,749 high-net-worth individuals, 776 corporations and other businesses and 123 pension and profit-sharing plans.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 26 March 2026
What services does GW&K Investment Management offer?
GW&K Investment Management provides financial planning, portfolio management for individuals and small businesses, portfolio management for investment companies, portfolio management for pooled vehicles, portfolio management for institutions and selecting other managers.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
Which custodians does GW&K Investment Management use?
GW&K Investment Management’s separately managed account assets are held at Merrill Lynch, Pierce, Fenner & Smith Incorporated (New York, NY), with $12,079,217,458 and Charles Schwab & Co., Inc. (Westlake, TX), with $10,661,840,361. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 26 March 2026
How many financial advisors does GW&K Investment Management have?
GW&K Investment Management has 10 investment adviser representatives registered with state securities authorities, out of 177 employees, and 63 perform investment advisory functions. 39 are registered representatives of a broker-dealer and 0 are licensed insurance agents.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
What does GW&K Investment Management invest in?
At the end of its last fiscal year, GW&K Investment Management’s separately managed accounts held 63% state and local bonds, 22% exchange-traded equities, 5% investment grade corporate bonds, 4% U.S. government and agency bonds, 2% high-yield corporate bonds, 2% cash and equivalents, 1% sovereign bonds and 1% registered funds (mutual funds, ETFs, BDCs). It advises 3 private funds.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns GW&K Investment Management?
GW&K Investment Management is owned through a chain of holding companies by Affiliated Managers Group, Inc. Its direct owners are Thomas Powers (5% to 10%) and Amg Boston Holdings, LLC (50% to 75%).
Source: Form ADV Part 1A, Schedules A and B, filed 26 March 2026
How does GW&K Investment Management get paid?
GW&K Investment Management is paid through a percentage of assets under management, fixed fees and performance-based fees. Its Form ADV lists no commissions among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file
