Gw&K Investment Management, Llc
SEC-registered
Wealth Manager · Large ($10B–$100B)
CRD 121942
· SEC file 801-61559
· Boston, MA
· www.gwkinvest.com
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ADV data as of Mar 26, 2026
- Regulatory AUM
- $52.8B
- Discretionary
- $52.8B
- Clients
- 48,710
- Avg AUM / client
- $1.1M
- Accounts
- 48,710
- Employees
- 177
AUM over time
$13.1B
$54.7B
Dec 2011
Dec 2025
Annual snapshots from Form ADV filings · as of Mar 26, 2026
Asset allocation (SMA assets by investment type)
as of Mar 26, 2026
State & local bonds
$33.3B
63%
Exchange-traded equities
$11.6B
22%
Investment-grade corporate bonds
$2.6B
5%
US government & agency bonds
$2.1B
4%
Non-investment-grade bonds
$1.1B
2%
Cash & equivalents
$1.1B
2%
Sovereign bonds
$528M
1%
Registered investment companies (funds/ETFs)
$528M
1%
Share of SMA assets by investment vehicle type, as filed in Form ADV Item 5.K. Dollar figures are percentages applied to total regulatory AUM.
Investments (13F portfolio — 1,020 positions, $11,342,046)
13F period Mar 31, 2026| # | Issuer | Class | Value | Shares | % of 13F | % of AUM |
|---|---|---|---|---|---|---|
| 1 | Advanced Energy Industries | COMMON | $193,984 | 601,105 | 1.71% | 0.0% |
| 2 | Macom Technology Solutions H | COMMON | $186,332 | 839,062 | 1.64% | 0.0% |
| 3 | Rbc Bearings Inc | COMMON | $153,098 | 281,879 | 1.35% | 0.0% |
| 4 | Itt Inc | COMMON | $151,806 | 796,746 | 1.34% | 0.0% |
| 5 | Spx Technologies Inc | COMMON | $134,989 | 675,142 | 1.19% | 0.0% |
| 6 | Comfort Systems Usa Inc | COMMON | $131,941 | 95,674 | 1.16% | 0.0% |
| 7 | Globus Medical Inc A | COMMON | $128,786 | 1,494,723 | 1.14% | 0.0% |
| 8 | Api Group Corp | COMMON | $126,056 | 3,110,942 | 1.11% | 0.0% |
| 9 | Sterling Infrastructure Inc | COMMON | $124,113 | 304,736 | 1.09% | 0.0% |
| 10 | Grand Canyon Education Inc | COMMON | $123,056 | 723,725 | 1.09% | 0.0% |
| 11 | Burlington Stores Inc | COMMON | $110,454 | 339,458 | 0.97% | 0.0% |
| 12 | Powell Industries Inc | COMMON | $108,508 | 200,535 | 0.96% | 0.0% |
| 13 | Texas Roadhouse Inc | COMMON | $105,501 | 638,849 | 0.93% | 0.0% |
| 14 | Broadcom Inc | COMMON | $104,240 | 336,789 | 0.92% | 0.0% |
| 15 | Federal Signal Corp | COMMON | $103,612 | 958,124 | 0.91% | 0.0% |
| 16 | Insmed Inc | COMMON | $101,881 | 623,048 | 0.9% | 0.0% |
| 17 | Novanta Inc | COMMON | $101,416 | 858,654 | 0.89% | 0.0% |
| 18 | Microsoft Corp | COMMON | $100,941 | 272,689 | 0.89% | 0.0% |
| 19 | Idacorp Inc | COMMON | $100,049 | 699,780 | 0.88% | 0.0% |
| 20 | Matador Resources Co | COMMON | $98,470 | 1,558,564 | 0.87% | 0.0% |
| 21 | Magnolia Oil & Gas Corp A | COMMON | $97,276 | 3,081,264 | 0.86% | 0.0% |
| 22 | Stifel Financial Corp | COMMON | $96,668 | 1,307,745 | 0.85% | 0.0% |
| 23 | Moog Inc Class A | COMMON | $96,265 | 328,949 | 0.85% | 0.0% |
| 24 | Jabil Inc | COMMON | $91,721 | 345,291 | 0.81% | 0.0% |
| 25 | Gates Industrial Corp Plc | COMMON | $91,080 | 4,028,336 | 0.8% | 0.0% |
Top 25 of 1,020 positions from the manager's latest Form 13F · source filing (EDGAR) ↗. 13F covers long US-listed positions only. "% of AUM" is share of the firm's total regulatory AUM (Form ADV Item 5.F).
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| High net worth individuals | 47,749 | $40.4B | 76.5% |
| Banking or thrift institutions | 17 | $312M | 0.59% |
| Investment companies | 17 | $4.9B | 9.34% |
| Pooled investment vehicles (non-investment companies) | 14 | $3.0B | 5.69% |
| Pension and profit sharing plans | 123 | $708M | 1.34% |
| State or municipal government entities | 13 | $294M | 0.56% |
| Sovereign wealth funds and foreign official institutions | 1 | $20.4M | 0.04% |
| Corporations and other businesses | 776 | $3.1B | 5.91% |
Private funds (3)
Reported in Form ADV Section 7.B.(1), filing of Mar 2024 · $157M combined gross assets
| Fund | Type | Domicile | Gross assets | Owners |
|---|---|---|---|---|
| Gw&K International Small Cap Fund, L.P. | Hedge Fund | Delaware | $67.6M | 76 |
| Gw&K International Small Cap Fund Ii, L.P. | Hedge Fund | Delaware | $65.1M | 40 |
| Gw&K Long Term International Small Cap Fund, L.P. | Hedge Fund | Delaware | $24.5M | 51 |
Nonprofit clients
Charities that reported this firm as a top-paid contractor (investment services) on Form 990.
| Charity | Location | Period |
|---|---|---|
| Catholic Community Foundation Of Minnesota EIN 411744184 | Minnesota, MN | 06/30/2025 |
Retirement plan clients
Plans that reported this firm as an investment service provider on Form 5500 Schedule C.
| Plan | Location | Plan year |
|---|---|---|
| Ironworkers Local 11 Pension Fund Ironworkers Local 11 Pension Fund Board Of Trustees | 2024 | |
| Steamfitters Local Union No. 420 Pension Plan Board Of Trustees Of Steamfitters Lu 420 Pension Plan | 2024 | |
| Old Dutch Foods Inc Country Salesmen Pension Plan Old Dutch Foods, Inc | 2024 | |
| Nfl Player Annuity Program Annuity Board Of The Nfl Player Annuity Program | 2024 | |
| Twin Cities Bakery Drivers Pension Plan Twin Cities Bakery Drivers Pension Fund | 2024 | |
| Minnesota Bakers Union Pension Plan Minnesota Bakers Union Pension Plan | 2024 | |
| Old Dutch Foods Office And Administrative Pension Plan Old Dutch Foods Inc | 2024 | |
| New Jersey Building Laborers Statewide Pension Fund Bd Of Trustees New Jersey Building Laborers Statewide Pension Fund | 2024 | |
| New Jersey Building Laborers Statewide Annuity Fund Bd Of Trustees Nj Building Laborers Statewide Annuity Fund | 2024 | |
| Iue Cwa Pension Plan Trustees Of Iue Cwa Afl Cio Pension Fund | 2024 |
People (12)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Rouse, David, John | Chief Compliance Officer | Mar 2021 (5y) | Less than 5% | |
| Kotler, Harold, Gilbert | Founder Chairman | Jun 2022 (4y) | Less than 5% | |
| Powers, Thomas, F X | Co Chief Executive Officer | Jun 2022 (4y) | 5% – 10% | |
| Roberts, Iii, Thomas, Williams | Co Chief Executive Officer | Jun 2022 (4y) | 5% – 10% | |
| James Michael Mccarthy | Registered representative | CFA | Jun 2022 (4y) | |
| Mark Patrick Lewis | Registered representative | CFA | Jul 2022 (4y) | |
| Scott Reed Peterson | Registered representative | CFA | Dec 2022 (4y) | |
| Christopher Ryan Lackey | Registered representative | CFA | Jul 2023 (3y) | |
| Joseph Stephen Pasquale | Registered representative | CFA | Aug 2023 (3y) | |
| Daniel John Fasciano | Registered representative | CFA | Dec 2023 (3y) | |
| Chad E O'neil | Registered representative | Aug 2025 (1y) | ||
| Matthew Theodore Shumaker | Registered representative | CFP | Sep 2025 (1y) |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| Amg Boston Holdings, Llc | Manager Member | Oct 2008 | A | 50% – 75% |
| Amg Gwk Holdings, Llc | Manager And Series A Member | Sep 2014 | B | ≈ 37.5% – 75% via Amg Boston Holdings, Llc |
| Affiliated Managers Group, Inc. | Manager And Sole Member | Jun 2014 | B | ≈ 28.13% – 75% via Amg Gwk Holdings, Llc |
Undisclosed: 0% – 40% of the firm is not attributable from the filed Schedule A bands.
Estimated effective ownership (look-through of filed bands):
- Amg Gwk Holdings, Llc: 75% – 100% of Amg Boston Holdings, Llc × 50% – 75% direct ≈ 37.5% – 75% of the firm
- Affiliated Managers Group, Inc.: 75% – 100% of Amg Gwk Holdings, Llc × 75% – 100% of Amg Boston Holdings, Llc × 50% – 75% direct ≈ 28.13% – 75% of the firm
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Private funds (3, $157M gross assets)
| Fund | Type | Gross assets | Min. investment | Owners |
|---|---|---|---|---|
| Gw&K International Small Cap Fund, L.P. | Hedge Fund | $67.6M | $250K | 76 |
| Gw&K International Small Cap Fund Ii, L.P. | Hedge Fund | $65.1M | $1.0M | 40 |
| Gw&K Long Term International Small Cap Fund, L.P. | Hedge Fund | $24.5M | $1.0M | 51 |
From Form ADV Section 7.B private fund reporting.
Retirement plans served (10)
| Plan | Sponsor | Participants | Plan assets | As of |
|---|---|---|---|---|
| Ironworkers Local 11 Pension Fund | Ironworkers Local 11 Pension Fund Board Of Trustees | 1,135 | $398M | 07/01/2024 |
| Steamfitters Local Union No. 420 Pension Plan | Board Of Trustees Of Steamfitters Lu 420 Pension Plan | 2,425 | $644M | 01/01/2024 |
| Old Dutch Foods Inc Country Salesmen Pension Plan | Old Dutch Foods, Inc | 110 | $19.8M | 01/01/2024 |
| Nfl Player Annuity Program | Annuity Board Of The Nfl Player Annuity Program | 2,790 | $2.0B | 01/01/2024 |
| Twin Cities Bakery Drivers Pension Plan | Twin Cities Bakery Drivers Pension Fund | 256 | $97.1M | 01/01/2024 |
| Minnesota Bakers Union Pension Plan | Minnesota Bakers Union Pension Plan | 848 | $227M | 01/01/2024 |
| Old Dutch Foods Office And Administrative Pension Plan | Old Dutch Foods Inc | 106 | $33.0M | 01/01/2024 |
| New Jersey Building Laborers Statewide Pension Fund | Bd Of Trustees New Jersey Building Laborers Statewide Pension Fund | 2,082 | $546M | 01/01/2024 |
| New Jersey Building Laborers Statewide Annuity Fund | Bd Of Trustees Nj Building Laborers Statewide Annuity Fund | 7,536 | $248M | 01/01/2024 |
| Iue Cwa Pension Plan | Trustees Of Iue Cwa Afl Cio Pension Fund | 387 | $475M | 01/01/2024 |
From Form 5500 service-provider disclosures.
Foundations & charities (1)
| Organization | Type | Assets | As of |
|---|---|---|---|
| Catholic Community Foundation Of Minnesota | Public charity | $752M | 06/30/2025 |
From IRS Form 990 investment-management-fee disclosures.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 03/26/2026 | 1.94 MB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
- • Fixed fees
- • Performance-based fees
Services
- • Financial planning services
- • Portfolio management for individuals/small businesses
- • Portfolio management for investment companies
- • Portfolio management for pooled investment vehicles
- • Portfolio management for businesses/institutional clients
- • Selection of other advisers
Custody
Reported custodians
- Merrill Lynch $12.1B (23% of AUM) Mar 2026
- Charles Schwab & Co. $10.7B (20% of AUM) Mar 2026
- State Street $4.5B (12% of AUM) Mar 2018
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports it does not have custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Mar 26, 2026.
View current Form ADV (SEC/IAPD) ↗