CIK: 0001082917
Total reported value
$12.8B
Reporting period: 2026-06-30 · Number of holdings: 1287
GW&K Investment Management, LLC disclosed 1287 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $12.8B and a quarterly turnover rate of 25.9%.
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GW&K Investment Management, LLC's disclosed holdings carry a Herfindahl concentration index of 0.006 — mathematically equivalent to about 179 equally-sized positions, well below its 1287 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 2.28), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
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Trim FIX
-54.2% -$45.1M
New buy CECO
Sold out 8TG
Trim LOPE
-14.8% -$34.8M
Add DELL
+15.0% $51.0M
Trim INSM
+1.1% -$34.7M
Showing top 200 holdings (of 1287 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | MTSI | Macom Technology Solutions H | Stock-Tech | 1.89% | +0.25% | -24.35% | |
| 2 | AEIS | Advanced Energy Industries | Stock-Industrials | 1.68% | -0.03% | -3.87% | |
| 3 | SPXC | Spx Technologies Inc | Stock-Industrials | 1.37% | +0.18% | +5.72% | |
| 4 | STRL | Sterling Infrastructure Inc | Stock-Industrials | 1.30% | +0.21% | -35.14% | |
| 5 | ITT | Itt Inc | Stock-Industrials | 1.18% | -0.16% | -4.09% | |
| 6 | NOVT | Novanta Inc | Stock-Other | 1.14% | +0.25% | +4.50% | |
| 7 | RBC | RBC Bearings Inc | Stock-Industrials | 1.13% | -0.22% | -20.41% | |
| 8 | MOG-A | Moog Inc-class A | Stock-Other | 1.03% | +0.18% | -5.29% | |
| 9 | ENTG | Entegris Inc | Stock-Tech | 0.98% | +0.22% | -5.73% | |
| 10 | APG | Api Group CORP | Stock-Industrials | 0.98% | -0.13% | -4.96% | |
| 11 | TXRH | Texas Roadhouse Inc | Stock-Consumer Disc | 0.97% | +0.04% | +0.84% | |
| 12 | FSS | Federal Signal CORP | Stock-Industrials | 0.93% | +0.02% | -3.31% | |
| 13 | FN | Fabrinet | Stock-Tech | 0.93% | +0.34% | +64.24% | |
| 14 | POWL | Powell Industries Inc | Stock-Industrials | 0.92% | -0.04% | +104.51% | |
| 15 | GMED | Globus Medical Inc - A | Stock-Healthcare | 0.90% | -0.24% | -2.78% | |
| 16 | COHR | Coherent CORP | Stock-Tech | 0.88% | +0.28% | -0.62% | |
| 17 | GTES | Gates Industrial Corporation plc | Stock-Industrials | 0.84% | +0.04% | -5.00% | |
| 18 | HALO | Halozyme Therapeutics Inc | Stock-Healthcare | 0.83% | +0.04% | -2.87% | |
| 19 | PFGC | Performance Food Group Co | Stock-Consumer Staples | 0.81% | +0.08% | -4.08% | |
| 20 | BURL | Burlington Stores Inc | Stock-Consumer Disc | 0.80% | -0.17% | -4.33% | |
| 21 | AVGO | Broadcom Inc | Stock-Tech | 0.80% | -0.12% | -19.21% | |
| 22 | IDA | Idacorp Inc | Stock-Utilities | 0.79% | -0.09% | -4.48% | |
| 23 | MSFT | Microsoft CORP | Stock-Tech | 0.78% | -0.11% | -1.29% | |
| 24 | UMBF | Umb Financial CORP | Stock-Financials | 0.75% | +0.05% | -4.10% | |
| 25 | NBIX | Neurocrine Biosciences Inc | Stock-Healthcare | 0.75% | +0.06% | -4.43% | |
| 26 | CVCO | Cavco Industries Inc | Stock-Consumer Disc | 0.74% | +0.04% | -6.03% | |
| 27 | ESI | Element Solutions Inc | Stock-Materials | 0.72% | +0.10% | -6.67% | |
| 28 | MEDP | Medpace Holdings Inc | Stock-Healthcare | 0.71% | -0.06% | -5.51% | |
| 29 | NDSN | Nordson CORP | Stock-Industrials | 0.69% | -0.04% | -6.06% | |
| 30 | LOPE | Grand Canyon Education Inc | Stock-Consumer Staples | 0.69% | -0.39% | -14.79% | |
| 31 | VOYA | Voya Financial Inc | Stock-Financials | 0.68% | +0.07% | -5.39% | |
| 32 | AIT | Applied Industrial Tech Inc | Stock-Industrials | 0.68% | +0.04% | -5.01% | |
| 33 | SF | Stifel Financial CORP | Stock-Financials | 0.68% | -0.17% | -4.64% | |
| 34 | FIX | Comfort Systems USA Inc | Stock-Industrials | 0.68% | -0.48% | -54.20% | |
| 35 | JBL | Jabil Inc | Stock-Tech | 0.66% | -0.15% | -36.42% | |
| 36 | JAZZ | Jazz Pharmaceuticals plc | Stock-Healthcare | 0.66% | +0.04% | -5.51% | |
| 37 | BBIO | Bridgebio Pharma Inc | Stock-Healthcare | 0.65% | +0.02% | +16.88% | |
| 38 | SEI | Solaris Energy Infrastructur | Stock-Energy | 0.65% | +0.12% | -2.22% | |
| 39 | VCYT | Veracyte Inc | Stock-Other | 0.65% | +0.24% | -1.45% | |
| 40 | RHP | Ryman Hospitality Properties | Stock-Real Estate | 0.62% | +0.33% | +74.15% | |
| 41 | CYTK | Cytokinetics Inc | Stock-Healthcare | 0.61% | +0.32% | +85.21% | |
| 42 | LGND | Ligand Pharmaceuticals | Stock-Healthcare | 0.61% | +0.35% | +65.14% | |
| 43 | DELL | Dell Technologies -c | Stock-Tech | 0.60% | +0.38% | +15.00% | |
| 44 | MGY | Magnolia Oil & Gas CORP - A | Stock-Energy | 0.58% | -0.28% | -5.32% | |
| 45 | CGNX | Cognex CORP | Stock-Tech | 0.58% | +0.11% | -5.67% | |
| 46 | BJ | Bj's Wholesale Club Holdings | Stock-Consumer Staples | 0.57% | -0.08% | +12.46% | |
| 47 | CFG | Citizens Financial Group | Stock-Financials | 0.57% | +0.01% | -1.59% | |
| 48 | PM | Philip Morris International | Stock-Consumer Staples | 0.55% | -0.03% | -1.63% | |
| 49 | DCO | Ducommun Inc | Stock-Other | 0.55% | +0.21% | +22.28% | |
| 50 | GBCI | Glacier Bancorp Inc | Stock-Financials | 0.54% | -0.02% | -4.33% |
Performance for Q3 2026
+2.2%
Performance Last 4 Quarters
+17.3%
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 1287 | $12.8B | 26 | ||
| 2026 Q1 | 1197 | $11.3B | 27 | ||
| 2025 Q4 | 1178 | $11.6B | 20 | ||
| 2025 Q3 | 1179 | $11.3B | 37 | ||
| 2025 Q2 | 1167 | $11.2B | 0 | ||
| 2025 Q1 | 1189 | $10.8B | 100 | ||
| 2024 Q4 | 1154 | $11.8B | 0 | ||
| 2024 Q3 | 1139 | $11.7B | 0 | ||
| 2024 Q2 | 1128 | $10.9B | 0 | ||
| 2024 Q1 | 1105 | $11.3B | 0 | ||
| 2023 Q4 | 1120 | $10.7B | 0 | ||
| 2023 Q3 | 1102 | $10.0B | 0 | ||
| 2023 Q2 | 1090 | $10.5B | 0 | ||
| 2023 Q1 | 715 | $10.3B | 0 | ||
| 2022 Q4 | 658 | $9.9B | 0 | ||
| 2022 Q3 | 563 | $9.1B | 0 | ||
| 2022 Q2 | 929 | $9.3B | 0 | ||
| 2022 Q1 | 997 | $11.2B | 0 | ||
| 2021 Q4 | 563 | $12.0B | 0 | ||
| 2021 Q3 | 541 | $11.2B | 0 | ||
| 2021 Q2 | 581 | $11.5B | 100 | ||
| 2021 Q1 | 552 | $10.9B | 26 | ||
| 2020 Q4 | 538 | $9.5B | 34 | ||
| 2020 Q3 | 545 | $7.6B | 22 | ||
| 2020 Q2 | 518 | $7.1B | 30 | ||
| 2020 Q1 | 521 | $5.7B | 44 | ||
| 2019 Q4 | 520 | $7.5B | 15 | ||
| 2019 Q3 | 514 | $7.1B | 21 | ||
| 2019 Q2 | 337 | $6.6B | 19 | ||
| 2019 Q1 | 303 | $6.2B | 31 | ||
| 2018 Q4 | 283 | $5.1B | 33 | ||
| 2018 Q3 | 286 | $6.2B | 19 | ||
| 2018 Q2 | 288 | $6.1B | 16 | ||
| 2018 Q1 | 292 | $5.9B | 21 | ||
| 2017 Q4 | 269 | $5.9B | 20 | ||
| 2017 Q3 | 261 | $6.0B | 18 | ||
| 2017 Q2 | 246 | $5.8B | 19 | ||
| 2017 Q1 | 229 | $5.3B | 16 | ||
| 2016 Q4 | 232 | $5.1B | 21 | ||
| 2016 Q3 | 220 | $5.3B | 23 | ||
| 2016 Q2 | 222 | $4.8B | 20 | ||
| 2016 Q1 | 218 | $4.5B | 21 | ||
| 2015 Q4 | 227 | $4.3B | 20 | ||
| 2015 Q3 | 223 | $4.2B | 19 | ||
| 2015 Q2 | 224 | $4.4B | 17 | ||
| 2015 Q1 | 222 | $4.4B | 21 | ||
| 2014 Q4 | 219 | $4.2B | 22 | ||
| 2014 Q3 | 224 | $3.8B | 18 | ||
| 2014 Q2 | 226 | $3.9B | 22 | ||
| 2014 Q1 | 222 | $3.7B | 19 | ||
| 2013 Q4 | 220 | $3.7B | 21 | ||
| 2013 Q3 | 221 | $3.3B | 27 | ||
| 2013 Q2 | 220 | $2.7B | — |
GW&K Investment Management, LLC's most significant position changes for 2026-06-30: New buy: Ceco Environmental CORP (CECO); Sold out: Thermon Group Holdings Inc (8TG); New buy: Cactus Inc - A (WHD); New buy: Argan Inc (AGX); New buy: Archrock Inc (AROC).
Showing top 200 changes by size (of 1141 total)
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | CECO | Ceco Environmental CORP | +0.4% | NEW | New buy |
| 2 | DELL | Dell Technologies -c | +0.4% | +15.00% | Add |
| 3 | LGND | Ligand Pharmaceuticals | +0.4% | +65.14% | Add |
| 4 | STX | Seagate Technology Holdings plc | +0.4% | +10006.39% | Add |
| 5 | FN | Fabrinet | +0.3% | +64.24% | Add |
| 6 | RHP | Ryman Hospitality Properties | +0.3% | +74.15% | Add |
| 7 | CYTK | Cytokinetics Inc | +0.3% | +85.21% | Add |
| 8 | WHD | Cactus Inc - A | +0.3% | NEW | New buy |
| 9 | COHR | Coherent CORP | +0.3% | -0.62% | Trim |
| 10 | AGX | Argan Inc | +0.3% | NEW | New buy |
| 11 | AROC | Archrock Inc | +0.3% | NEW | New buy |
| 12 | DRI | Darden Restaurants Inc | +0.3% | +139207.89% | Add |
| 13 | MTSI | Macom Technology Solutions H | +0.3% | -24.35% | Trim |
| 14 | NOVT | Novanta Inc | +0.3% | +4.50% | Add |
| 15 | VCYT | Veracyte Inc | +0.2% | -1.45% | Trim |
| 16 | ENTG | Entegris Inc | +0.2% | -5.73% | Trim |
| 17 | STRL | Sterling Infrastructure Inc | +0.2% | -35.14% | Trim |
| 18 | DCO | Ducommun Inc | +0.2% | +22.28% | Add |
| 19 | APD | Air Products & Chemicals Inc | +0.2% | +85236.19% | Add |
| 20 | SMTC | Semtech CORP | +0.2% | -15.07% | Trim |
| 21 | IRM | Iron Mountain Inc | +0.2% | +80342.62% | Add |
| 22 | SPXC | Spx Technologies Inc | +0.2% | +5.72% | Add |
| 23 | MOG-A | Moog Inc-class A | +0.2% | -5.29% | Trim |
| 24 | ALGM | Allegro Microsystems Inc | +0.2% | +1.10% | Add |
| 25 | MU | Micron Technology Inc | +0.2% | +485.92% | Add |
| 26 | TVTX | Travere Therapeutics Inc | +0.1% | +187.78% | Add |
| 27 | SFM | Sprouts Farmers Market Inc | +0.1% | NEW | New buy |
| 28 | CROX | Crocs Inc | +0.1% | NEW | New buy |
| 29 | AMD | Advanced Micro Devices | +0.1% | +1762.71% | Add |
| 30 | TSM | Taiwan Semiconductor-sp Adr | +0.1% | +12.44% | Add |
| 31 | CSL | Carlisle Cos Inc | +0.1% | +23560.41% | Add |
| 32 | SEI | Solaris Energy Infrastructur | +0.1% | -2.22% | Trim |
| 33 | ALKS | Alkermes plc | +0.1% | NEW | New buy |
| 34 | CGNX | Cognex CORP | +0.1% | -5.67% | Trim |
| 35 | HQY | Healthequity Inc | +0.1% | +36.20% | Add |
| 36 | TXN | Texas Instruments Inc | +0.1% | +4.30% | Add |
| 37 | FWONK | Liberty Media Corp-formula-c | +0.1% | +19606.34% | Add |
| 38 | TRI | Thomson Reuters CORP | +0.1% | NEW | New buy |
| 39 | ESI | Element Solutions Inc | +0.1% | -6.67% | Trim |
| 40 | SAIL | Sailpoint Inc | +0.1% | +30.12% | Add |
| 41 | NEO | Neogenomics Inc | +0.1% | -2.80% | Trim |
| 42 | CVLT | Commvault Systems Inc | +0.1% | +2.48% | Add |
| 43 | TCBI | Texas Capital Bancshares Inc | +0.1% | +55.62% | Add |
| 44 | LGN | Legence Corp-cl A | +0.1% | -2.12% | Trim |
| 45 | RARE | Ultragenyx Pharmaceutical In | +0.1% | -8.31% | Trim |
| 46 | PFGC | Performance Food Group Co | +0.1% | -4.08% | Trim |
| 47 | VCEL | Vericel CORP | +0.1% | -4.10% | Trim |
| 48 | UFPT | Ufp Technologies Inc | +0.1% | +54.48% | Add |
| 49 | AIN | Albany Intl Corp-cl A | +0.1% | +64.59% | Add |
| 50 | ARES | Ares Management CORP - A | +0.1% | +84.13% | Add |
GW&K Investment Management, LLC returned an annualized 13.6% over the trailing 36 months — underperforming the S&P 500 by 6.7 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.04 (roughly in line with the market) and a 31% quarterly batting average against the index.
Its portfolio is broadly diversified and moderately active.
Its turnover score has risen from 0 to 26 over the past 4 quarters — a shift toward more active trading.
It has added to its DELL position over the past two quarters (+$76.1M, now $76.2M), while trimming BFAM over the same stretch (-$52.1M, still holding $1.0K).
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