GW&K Investment Management, LLC
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 12, 2025), GW&K Investment Management, LLC reported 999 stock positions worth $11.3 billion. Its top holding was Microsoft (MSFT) at 1.4% of the portfolio, followed by RBC Bearings (RBC, 1.4%) and Comfort Systems USA (FIX, 1.3%). Compared with Q2 2025, it opened 27 new positions, sold out of 19, added to 374 and reduced 395. The biggest buy was a new position in Moog Class A (MOG.A) and the biggest sale Cyberark Software Ltd./Israel (CYBR, shares −79%).
- Most Recent 13F
- Q2 2026
- Location
- BOSTON, MA
- CIK
- 0001082917
- Portfolio Value
- $11.3B (Q3 2025)
- SEC Filing
- 0001082917-25-000007 ↗ filed Nov 12, 2025
Holdings Value
Holdings 999 stocks · $11.3B
| MSFT Microsoft Corp. | 1.39% | 302,717 | $156.8M | Reduce -1.8% |
| RBC RBC Bearings Inc. | 1.36% | 394,243 | $153.9M | Reduce -7.1% |
| FIX Comfort Systems USA Inc. | 1.28% | 174,817 | $144.3M | Reduce -13.9% |
| MTSI Macom Technology Solutions H | 1.26% | 1,147,768 | $142.9M | Reduce -6.2% |
| LOPE Grand Canyon Education Inc. | 1.24% | 637,204 | $139.9M | Reduce -8.0% |
| ITT Itt Inc. | 1.17% | 738,993 | $132.1M | Reduce -3.6% |
| AVGO Broadcom Inc. | 1.16% | 398,544 | $131.5M | Reduce -30.3% |
| TXRH Texas Roadhouse Inc. | 1.06% | 720,232 | $119.7M | Reduce -3.4% |
| AEIS Advanced Energy Industries | 1.05% | 699,780 | $119.1M | Add +51.5% |
| APG Api Group Corp. | 0.99% | 3,271,772 | $112.5M | Reduce -10.8% |
| GTES Gates Industrial Corp. UK Ltd. | 0.99% | 4,503,972 | $111.8M | Reduce -9.0% |
| PIPR Piper Sandler Cos | 0.95% | 309,109 | $107.3M | Reduce -4.3% |
| SF Stifel Financial Corp. | 0.94% | 940,880 | $106.8M | Reduce -8.9% |
| PFGC Performance Food Group Co. | 0.92% | 996,370 | $103.7M | Reduce -27.0% |
| SPXC SPX Technologies Inc. | 0.91% | 550,597 | $102.8M | Add +41.0% |
| MEDP Medpace Holdings Inc. | 0.90% | 198,261 | $101.9M | Reduce -23.7% |
| GMED Globus Medical Inc. Class A | 0.90% | 1,777,431 | $101.8M | Reduce -3.9% |
| HALO Halozyme Therapeutics Inc. | 0.82% | 1,261,717 | $92.5M | Reduce -11.4% |
| CVCO Cavco Industries Inc. | 0.82% | 158,660 | $92.1M | Reduce -4.2% |
| STRL Sterling Infrastructure Inc. | 0.81% | 268,151 | $91.1M | Reduce -32.0% |
| IDA Idacorp Inc. | 0.78% | 669,727 | $88.5M | Reduce -3.8% |
| UMBF Umb Financial Corp. | 0.78% | 742,958 | $87.9M | Add +20.0% |
| ABBV Abbvie Inc. | 0.77% | 375,778 | $87.0M | Reduce -1.6% |
| INSM Insmed Inc. | 0.77% | 601,803 | $86.7M | Reduce -52.8% |
| DORM Dorman Products Inc. | 0.76% | 549,391 | $85.6M | Reduce -7.9% |
| NBIX Neurocrine Biosciences Inc. | 0.74% | 594,385 | $83.4M | Reduce -2.9% |
| NDSN Nordson Corp. | 0.73% | 361,428 | $82.0M | Reduce -3.9% |
| JBL Jabil Inc. | 0.71% | 370,907 | $80.6M | Add +32.5% |
| PCOR Procore Technologies Inc. | 0.69% | 1,070,871 | $78.1M | Add +28.1% |
| BJ Bj's Wholesale Club Holdings filed as BJS WHSL CLUB HLDGS INC | 0.68% | 822,563 | $76.7M | Add +14.7% |
| BURL Burlington Stores Inc. | 0.67% | 297,697 | $75.8M | Reduce -1.0% |
| SAIL Sailpoint Inc. | 0.66% | 3,395,602 | $75.0M | Add +34.3% |
| CGNX Cognex Corp. | 0.65% | 1,622,197 | $73.5M | Reduce -3.1% |
| VOYA Voya Financial Inc. | 0.65% | 978,780 | $73.2M | Reduce -4.2% |
| EXP Eagle Materials Inc. | 0.64% | 312,422 | $72.8M | Reduce -3.7% |
| ENTG Entegris Inc. | 0.63% | 768,752 | $71.1M | Add +25.6% |
| FSS Federal Signal Corp. | 0.62% | 592,957 | $70.6M | Reduce -20.2% |
| MTDR Matador Resources Co. | 0.62% | 1,566,350 | $70.4M | Reduce -7.1% |
| HLI Houlihan Lokey Inc. | 0.62% | 342,641 | $70.4M | Reduce -11.4% |
| GPI Group 1 Automotive Inc. | 0.62% | 160,693 | $70.3M | Reduce -4.1% |
| RPM RPM International Inc. | 0.62% | 592,000 | $69.8M | Reduce -3.5% |
| PRIM Primoris Services Corp. | 0.62% | 507,214 | $69.7M | Reduce -2.7% |
| ADC Agree Realty Corp. | 0.61% | 978,476 | $69.5M | Reduce -3.5% |
| KNSL Kinsale Capital Group Inc. | 0.61% | 162,556 | $69.1M | Reduce -3.6% |
| JPM JPMorgan Chase & Co. | 0.61% | 218,063 | $68.8M | Reduce -2.1% |
| POWL Powell Industries Inc. | 0.61% | 224,507 | $68.4M | Add +23.6% |
| SITE Siteone Landscape Supply Inc. | 0.60% | 525,360 | $67.7M | Reduce -11.1% |
| TPH Tri Pointe Homes Inc. | 0.59% | 1,970,833 | $67.0M | Add +0.1% |
| NTRA Natera Inc. | 0.59% | 413,474 | $66.6M | Reduce -3.5% |
| PM Philip Morris International | 0.58% | 407,164 | $66.0M | Reduce -0.9% |
| MGY Magnolia Oil & Gas Corp. Class A | 0.58% | 2,765,094 | $66.0M | Reduce -9.4% |
| WTFC Wintrust Financial Corp. | 0.58% | 496,794 | $65.8M | Reduce -4.2% |
| NVDA Nvidia Corp. | 0.56% | 340,184 | $63.5M | Reduce -3.1% |
| ESI Element Solutions Inc. | 0.55% | 2,475,413 | $62.3M | Reduce -4.2% |
| MOG.A Moog Inc. Class A | 0.55% | 298,846 | $62.1M | New |
| CCC CCC Intelligent Solutions Ho | 0.53% | 6,633,570 | $60.4M | Reduce -3.6% |
| JAZZ Jazz Pharmaceuticals PLC | 0.53% | 454,712 | $59.9M | Reduce -3.8% |
| AUB Atlantic Union Bankshares Co. | 0.53% | 1,692,845 | $59.7M | Add +9.1% |
| AIZ Assurant Inc. | 0.53% | 274,862 | $59.5M | Add +25.6% |
| ORI Old Republic Intl Corp. | 0.52% | 1,392,008 | $59.1M | Reduce -5.2% |
| PCTY Paylocity Holding Corp. | 0.52% | 369,831 | $58.9M | Reduce -3.7% |
| BFAM Bright Horizons Family Solut | 0.52% | 542,056 | $58.9M | Reduce -4.0% |
| CHDN Churchill Downs Inc. | 0.52% | 605,493 | $58.7M | Reduce -3.2% |
| GBCI Glacier Bancorp Inc. | 0.50% | 1,150,558 | $56.0M | Reduce -7.6% |
| AIT Applied Industrial Tech Inc. | 0.49% | 211,182 | $55.1M | Add +2.9% |
| ZBRA Zebra Technologies Corp. Class A | 0.48% | 183,065 | $54.4M | Reduce -3.5% |
| ETR Entergy Corp. | 0.48% | 581,150 | $54.2M | Reduce -1.4% |
| SUI Sun Communities Inc. filed as SUN CMNTYS INC | 0.47% | 415,306 | $53.6M | Reduce -3.7% |
| SUPN Supernus Pharmaceuticals Inc. | 0.46% | 1,080,538 | $51.6M | Reduce -14.6% |
| ENB Enbridge Inc. | 0.46% | 1,022,255 | $51.6M | Reduce -1.0% |
| BIO Bio-Rad Laboratories-A | 0.46% | 183,845 | $51.5M | Add +24.9% |
| BR Broadridge Financial Solutio | 0.45% | 215,556 | $51.3M | Reduce -1.4% |
| EGP Eastgroup Properties Inc. | 0.45% | 300,085 | $50.8M | Reduce -3.5% |
| CFR Cullen/Frost Bankers Inc. | 0.45% | 400,040 | $50.7M | Add +13.1% |
| LECO Lincoln Electric Holdings | 0.45% | 214,508 | $50.6M | Reduce -4.1% |
| CFG Citizens Financial Group | 0.44% | 941,172 | $50.0M | Reduce -0.9% |
| LIN Linde PLC | 0.44% | 105,040 | $49.9M | Reduce -1.6% |
| FTAI Ftai Aviation Ltd. | 0.43% | 293,849 | $49.0M | Add +2.5% |
| HOLX Hologic Inc. | 0.43% | 725,249 | $48.9M | Add +32.9% |
| ABCB Ameris Bancorp | 0.43% | 663,330 | $48.6M | Reduce -9.4% |
| MANH Manhattan Associates Inc. | 0.43% | 237,208 | $48.6M | Reduce -20.5% |
| MS Morgan Stanley | 0.42% | 300,206 | $47.7M | Reduce -1.7% |
| RTX RTX Corp. | 0.42% | 281,996 | $47.2M | Reduce -0.9% |
| SEI Solaris Energy Infrastructur | 0.42% | 1,177,830 | $47.1M | Add +12.5% |
| POOL Pool Corp. | 0.42% | 151,721 | $47.0M | Reduce -3.1% |
| BLK BlackRock Inc. | 0.41% | 39,745 | $46.3M | Reduce -1.4% |
| DSGX The Descartes Systems Grp | 0.40% | 483,976 | $45.6M | Reduce -10.9% |
| SBCF Seacoast Banking Corp. | 0.40% | 1,489,081 | $45.3M | Add +5.5% |
| ABT Abbott Laboratories | 0.40% | 336,941 | $45.1M | Reduce -1.3% |
| WSO Watsco Inc. | 0.40% | 111,213 | $45.0M | Reduce -1.4% |
| INTA Intapp Inc. | 0.40% | 1,097,150 | $44.9M | Add +12.8% |
| FAST Fastenal Co. | 0.40% | 913,689 | $44.8M | Reduce -1.1% |
| VCYT Veracyte Inc. | 0.39% | 1,283,479 | $44.1M | Reduce -8.6% |
| HD Home Depot Inc. | 0.39% | 107,900 | $43.7M | Reduce -1.2% |
| MZTI The Marzetti Company | 0.39% | 252,458 | $43.6M | Reduce -25.1% |
| FERG Ferguson Enterprises Inc. | 0.38% | 192,546 | $43.2M | Reduce -1.2% |
| STE Steris PLC | 0.38% | 174,758 | $43.2M | Reduce -1.3% |
| ITGR Integer Holdings Corp. | 0.38% | 416,077 | $43.0M | Reduce -4.0% |
| AVNT Avient Corp. | 0.38% | 1,304,781 | $43.0M | Add +12.5% |
| HQY Healthequity Inc. | 0.37% | 446,993 | $42.4M | Reduce -10.4% |
Other holdings (1): bonds, preferreds, convertibles and warrants · $0 (not counted above)
| Security | Class | Shares / Principal | Value | Change |
|---|---|---|---|---|
| OXY.WS Occidental Petroleum-CW27 | *W EXP 08/03/202 | 1 | $0 | No change |
Portfolio Sells Q2 2025 → Q3 2025
| CYBR Cyberark Software Ltd./Israel | Reduce -79.3% | 0.28% | −0.87 |
| GTLS Chart Industries Inc. | Reduce -99.7% | 0.00% | −0.65 |
| IEX Idex Corp. | Reduce -84.4% | 0.08% | −0.51 |
| VNOM Viper Energy Inc. | Sold out | 0.00% | −0.39 |
| INSM Insmed Inc. | Reduce -52.8% | 0.77% | −0.38 |
| PNFP Pinnacle Financial Partners | Reduce -37.9% | 0.37% | −0.34 |
| MTSI Macom Technology Solutions H | Reduce -6.2% | 1.26% | −0.31 |
| ACHC Acadia Healthcare Co. Inc. | Reduce -85.4% | 0.05% | −0.27 |
| BAH Booz Allen Hamilton Holdings | Reduce -98.9% | 0.00% | −0.26 |
| AVGO Broadcom Inc. | Reduce -30.3% | 1.16% | −0.25 |
| MKTX Marketaxess Holdings Inc. | Reduce -78.7% | 0.05% | −0.24 |
| BWIN Baldwin Insurance Group Inc./ | Reduce -96.9% | 0.00% | −0.22 |
| GLOB Globant SA | Reduce -80.7% | 0.03% | −0.20 |
| CACI Caci International Inc. Class A | Reduce -99.7% | 0.00% | −0.20 |
| TXRH Texas Roadhouse Inc. | Reduce -3.4% | 1.06% | −0.19 |
| TNDM Tandem Diabetes Care Inc. | Reduce -5.8% | 0.29% | −0.19 |
| VCEL Vericel Corp. | Reduce -8.8% | 0.36% | −0.18 |
| VRNA Verona Pharma Ltd. | Sold out | 0.00% | −0.16 |
| PFGC Performance Food Group Co. | Reduce -27.0% | 0.92% | −0.15 |
| PAR Par Technology Corp. | Reduce -22.9% | 0.11% | −0.14 |
| CBZ Cbiz Inc. | Reduce -1.6% | 0.35% | −0.14 |
| MZTI The Marzetti Company | Reduce -25.1% | 0.39% | −0.14 |
| PPBI Pacific Premier Bancorp Inc. | Sold out | 0.00% | −0.13 |
| NOVT Novanta Inc. | Reduce -15.9% | 0.23% | −0.12 |
| APG Api Group Corp. | Reduce -10.8% | 0.99% | −0.12 |
| KNSL Kinsale Capital Group Inc. | Reduce -3.6% | 0.61% | −0.12 |
| AMZN Amazon.com Inc. | Reduce -29.4% | 0.26% | −0.11 |
| BFAM Bright Horizons Family Solut | Reduce -4.0% | 0.52% | −0.10 |
| PCTY Paylocity Holding Corp. | Reduce -3.7% | 0.52% | −0.10 |
| RBC RBC Bearings Inc. | Reduce -7.1% | 1.36% | −0.10 |
| MTDR Matador Resources Co. | Reduce -7.1% | 0.62% | −0.10 |
| MANH Manhattan Associates Inc. | Reduce -20.5% | 0.43% | −0.10 |
| ITGR Integer Holdings Corp. | Reduce -4.0% | 0.38% | −0.10 |
| ALKT Alkami Technology Inc. | Reduce -16.9% | 0.20% | −0.10 |
| HQY Healthequity Inc. | Reduce -10.4% | 0.37% | −0.09 |
| ORLY O'reilly Automotive Inc. | Reduce -84.1% | 0.02% | −0.09 |
| TMUS T-Mobile US Inc. | Reduce -81.2% | 0.02% | −0.09 |
| DSGX The Descartes Systems Grp | Reduce -10.9% | 0.40% | −0.09 |
| SLGN Silgan Holdings Inc. | Reduce -3.0% | 0.29% | −0.09 |
| SN Sharkninja Inc. | Reduce -43.0% | 0.12% | −0.09 |
| PM Philip Morris International | Reduce -0.9% | 0.58% | −0.09 |
| SNDR Schneider National Inc. Class B | Reduce -8.3% | 0.33% | −0.09 |
| FSS Federal Signal Corp. | Reduce -20.2% | 0.62% | −0.08 |
| EXPO Exponent Inc. | Reduce -22.3% | 0.20% | −0.08 |
| GGG Graco Inc. | Reduce -100.0% | 0.00% | −0.08 |
| GMED Globus Medical Inc. Class A | Reduce -3.9% | 0.90% | −0.08 |
| ATR Aptargroup Inc. | Reduce -3.4% | 0.33% | −0.08 |
| BCPC Balchem Corp. | Reduce -14.0% | 0.27% | −0.07 |
| RHP Ryman Hospitality Properties | Reduce -13.9% | 0.22% | −0.07 |
| BCRX Biocryst Pharmaceuticals Inc. | Reduce -16.2% | 0.15% | −0.06 |
Portfolio Buys Q2 2025 → Q3 2025
| MOG.A Moog Inc. Class A | New | 0.55% | +0.55 |
| AEIS Advanced Energy Industries | Add +51.5% | 1.05% | +0.51 |
| LEVI Levi Strauss & Co. Class A | New | 0.35% | +0.35 |
| SPXC SPX Technologies Inc. | Add +41.0% | 0.91% | +0.32 |
| BBIO Bridgebio Pharma Inc. | New | 0.27% | +0.27 |
| POWL Powell Industries Inc. | Add +23.6% | 0.61% | +0.26 |
| CRDO Credo Technology Group Holdi | New | 0.26% | +0.26 |
| CVLT Commvault Systems Inc. | New | 0.25% | +0.25 |
| SMTC Semtech Corp. | New | 0.24% | +0.24 |
| UNH Unitedhealth Group Inc. | Add +1891.8% | 0.25% | +0.24 |
| COLB Columbia Banking System Inc. | New | 0.22% | +0.22 |
| UMBF Umb Financial Corp. | Add +20.0% | 0.78% | +0.20 |
| ENTG Entegris Inc. | Add +25.6% | 0.63% | +0.19 |
| THR Thermon Group Holdings Inc. | Add +133.4% | 0.34% | +0.18 |
| PCOR Procore Technologies Inc. | Add +28.1% | 0.69% | +0.18 |
| JBL Jabil Inc. | Add +32.5% | 0.71% | +0.17 |
| AAMI Acadian Asset Management Inc. | New | 0.16% | +0.16 |
| MASI Masimo Corp. | Add +91786.7% | 0.16% | +0.16 |
| AVAV Aerovironment Inc. | New | 0.16% | +0.16 |
| LRN Stride Inc. | New | 0.15% | +0.15 |
| SEI Solaris Energy Infrastructur | Add +12.5% | 0.42% | +0.15 |
| RARE Ultragenyx Pharmaceutical Inc. | Add +139.0% | 0.31% | +0.15 |
| SAIL Sailpoint Inc. | Add +34.3% | 0.66% | +0.15 |
| AIZ Assurant Inc. | Add +25.6% | 0.53% | +0.14 |
| FTAI Ftai Aviation Ltd. | Add +2.5% | 0.43% | +0.14 |
| BIO Bio-Rad Laboratories-A | Add +24.9% | 0.46% | +0.14 |
| HOLX Hologic Inc. | Add +32.9% | 0.43% | +0.11 |
| SKWD Skyward Specialty Insurance | Add +309.7% | 0.15% | +0.11 |
| RGTI Rigetti Computing Inc. | New | 0.10% | +0.10 |
| AUB Atlantic Union Bankshares Co. | Add +9.1% | 0.53% | +0.09 |
| CYTK Cytokinetics Inc. | New | 0.09% | +0.09 |
| TSLA Tesla Inc. | Add +906.8% | 0.09% | +0.09 |
| OWL Blue Owl Capital Inc. | Add +84.8% | 0.23% | +0.09 |
| LITE Lumentum Holdings Inc. | Add +60.8% | 0.12% | +0.08 |
| VVV Valvoline Inc. | Add +33084.3% | 0.07% | +0.07 |
| AIT Applied Industrial Tech Inc. | Add +2.9% | 0.49% | +0.06 |
| ALLY Ally Financial Inc. | Add +27.0% | 0.29% | +0.06 |
| TTAN Servicetitan Inc. Class A | Add +31.0% | 0.33% | +0.06 |
| SBCF Seacoast Banking Corp. | Add +5.5% | 0.40% | +0.05 |
| MCHB Mechanics Bancorp Class A | Add +93.2% | 0.11% | +0.05 |
| WTRG Essential Utilities Inc. | Add +14.4% | 0.29% | +0.05 |
| ALAB Astera Labs Inc. | New | 0.05% | +0.05 |
| AVNT Avient Corp. | Add +12.5% | 0.38% | +0.04 |
| CFR Cullen/Frost Bankers Inc. | Add +13.1% | 0.45% | +0.04 |
| IWM iShares Russell 2000 ETF | Add +26.0% | 0.14% | +0.04 |
| AR Antero Resources Corp. | Add +38.5% | 0.31% | +0.04 |
| TPH Tri Pointe Homes Inc. | Add +0.1% | 0.59% | +0.03 |
| PHAT Phathom Pharmaceuticals Inc. | Add +9.1% | 0.12% | +0.03 |
| IDEV iShares Core MSCI Dev MKTS | Add +67.1% | 0.06% | +0.03 |
| PRGS Progress Software Corp. | New | 0.02% | +0.02 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 1,107 | $12.8B | MTSI, AEIS, SPXC, STRL, ITT |
| Q1 2026 | 1,019 | $11.3B | AEIS, MTSI, RBC, ITT, SPXC |
| Q4 2025 | 996 | $11.6B | MTSI, RBC, ITT, MSFT, AEIS |
| Q3 2025 | 999 | $11.3B | MSFT, RBC, FIX, MTSI, LOPE |
| Q2 2025 | 991 | $11.2B | MTSI, RBC, AVGO, MSFT, TXRH |
| Q1 2025 | 1,010 | $10.8B | RBC, TXRH, MTSI, GMED, MSFT |
| Q4 2024 | 973 | $11.8B | TXRH, MTSI, CYBR, GMED, RBC |
| Q3 2024 | 960 | $11.7B | TXRH, RBC, MSFT, CYBR, MTSI |
| Q2 2024 | 942 | $10.9B | TXRH, MSFT, MTSI, RBC, CYBR |
| Q1 2024 | 927 | $11.3B | TXRH, MSFT, RBC, ENTG, MTDR |