GW&K Investment Management, LLC — 13F Holdings & Portfolio
CIK 1082917 · latest 13F-HR filed 2026-05-13
GW&K Investment Management, LLC manages $11.3M in 13F-reported U.S. long-equity assets across 1,197 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are AEIS (1.60%), MTSI (1.52%), RBC (1.24%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 52 new positions, exited 29, added to 382, and trimmed 350.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$11.3M
Long-equity book
1,197
Distinct positions
2026-03-31
Filed 2026-05-13
+52 / −29 / ↑382 / ↓350
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- ADVANCED ENERGY INDUSTRIES$51.3K +35.9%
- FEDERAL SIGNAL CORP$42.3K +69.0%
- MATADOR RESOURCES CO$31.8K +47.6%
- TEXAS INSTRUMENTS INC$30.3K +19928.9%
- SPX TECHNOLOGIES INC$30.1K +28.7%
Top Trims
- BRIGHT HORIZONS FAMILY SOLUT-$52.1K -99.9%
- MICROSOFT CORP-$44.6K -30.6%
- SERVICETITAN INC-A-$37.8K -99.9%
- WATSCO INC-$35.8K -96.4%
- TRI POINTE HOMES INC-$35.3K -59.7%
New Positions
- PIPER SANDLER COS$70.1K
- COHERENT CORP$68.4K
- FABRINET$66.9K
- PINNACLE FINANCIAL PARTNERS$47.0K
- CURTISS-WRIGHT CORP$42.9K
Exited Positions
- PIPER SANDLER COS$100.7K
- PINNACLE FINANCIAL PARTNERS$44.2K
- BARRETT BUSINESS SVCS INC$18.6K
- DYNAVAX TECHNOLOGIES CORP$3.7K
- GLOBANT SA$3.6K
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | ADVANCED ENERGY INDUSTRIES | AEIS | 007973100 | $181.4K | 1.60% | 562,178 | SH |
| 2 | MACOM TECHNOLOGY SOLUTIONS H | MTSI | 55405Y100 | $172.6K | 1.52% | 777,132 | SH |
| 3 | RBC BEARINGS INC | RBC | 75524B104 | $141.2K | 1.24% | 259,990 | SH |
| 4 | ITT INC | ITT | 45073V108 | $140.7K | 1.24% | 738,601 | SH |
| 5 | SPX TECHNOLOGIES INC | SPXC | 78473E103 | $126.0K | 1.11% | 630,003 | SH |
| 6 | COMFORT SYSTEMS USA INC | FIX | 199908104 | $120.4K | 1.06% | 87,339 | SH |
| 7 | GLOBUS MEDICAL INC - A | GMED | 379577208 | $119.9K | 1.06% | 1,391,708 | SH |
| 8 | API GROUP CORP | APG | 00187Y100 | $116.8K | 1.03% | 2,883,611 | SH |
| 9 | GRAND CANYON EDUCATION INC | LOPE | 38526M106 | $116.4K | 1.03% | 684,397 | SH |
| 10 | STERLING INFRASTRUCTURE INC | STRL | 859241101 | $116.2K | 1.02% | 285,370 | SH |
| 11 | BROADCOM INC | AVGO | 11135F101 | $104.2K | 0.92% | 336,789 | SH |
| 12 | BURLINGTON STORES INC | BURL | 122017106 | $102.9K | 0.91% | 316,345 | SH |
| 13 | POWELL INDUSTRIES INC | POWL | 739128106 | $101.3K | 0.89% | 187,280 | SH |
| 14 | MICROSOFT CORP | MSFT | 594918104 | $100.9K | 0.89% | 272,689 | SH |
| 15 | TEXAS ROADHOUSE INC | TXRH | 882681109 | $97.1K | 0.86% | 587,919 | SH |
| 16 | FEDERAL SIGNAL CORP | FSS | 313855108 | $97.0K | 0.86% | 896,835 | SH |
| 17 | INSMED INC | INSM | 457669307 | $95.1K | 0.84% | 581,809 | SH |
| 18 | NOVANTA INC | NOVT | 67000B104 | $94.8K | 0.84% | 802,264 | SH |
| 19 | MATADOR RESOURCES CO | MTDR | 576485205 | $92.1K | 0.81% | 1,457,285 | SH |
| 20 | IDACORP INC | IDA | 451107106 | $91.8K | 0.81% | 641,782 | SH |
| 21 | MOOG INC-CLASS A | MOG.A | 615394202 | $90.2K | 0.80% | 308,304 | SH |
| 22 | MAGNOLIA OIL & GAS CORP - A | MGY | 559663109 | $89.6K | 0.79% | 2,836,713 | SH |
| 23 | STIFEL FINANCIAL CORP | SF | 860630102 | $88.8K | 0.78% | 1,201,873 | SH |
| 24 | JABIL INC | JBL | 466313103 | $85.3K | 0.75% | 321,169 | SH |
| 25 | HALOZYME THERAPEUTICS INC | HALO | 40637H109 | $84.4K | 0.74% | 1,305,557 | SH |
| 26 | GATES INDUSTRIAL CORP PLC | GTES | G39108108 | $83.1K | 0.73% | 3,676,001 | SH |
| 27 | MEDPACE HOLDINGS INC | MEDP | 58506Q109 | $82.3K | 0.73% | 171,332 | SH |
| 28 | ENTEGRIS INC | ENTG | 29362U104 | $80.7K | 0.71% | 688,543 | SH |
| 29 | PERFORMANCE FOOD GROUP CO | PFGC | 71377A103 | $77.9K | 0.69% | 908,954 | SH |
| 30 | NORDSON CORP | NDSN | 655663102 | $76.0K | 0.67% | 285,795 | SH |
| 31 | UMB FINANCIAL CORP | UMBF | 902788108 | $72.7K | 0.64% | 644,863 | SH |
| 32 | NEUROCRINE BIOSCIENCES INC | NBIX | 64125C109 | $72.6K | 0.64% | 550,960 | SH |
| 33 | CAVCO INDUSTRIES INC | CVCO | 149568107 | $72.0K | 0.63% | 148,608 | SH |
| 34 | BRIDGEBIO PHARMA INC | BBIO | 10806X102 | $67.4K | 0.59% | 907,421 | SH |
| 35 | APPLIED INDUSTRIAL TECH INC | AIT | 03820C105 | $67.3K | 0.59% | 253,828 | SH |
| 36 | ABBVIE INC | ABBV | 00287Y109 | $67.3K | 0.59% | 309,419 | SH |
| 37 | BJS WHOLESALE CLUB HOLDINGS | BJ | 05550J101 | $66.3K | 0.58% | 673,283 | SH |
| 38 | PHILIP MORRIS INTERNATIONAL | PM | 718172109 | $65.8K | 0.58% | 397,723 | SH |
| 39 | VOYA FINANCIAL INC | VOYA | 929089100 | $64.0K | 0.56% | 937,095 | SH |
| 40 | COHERENT CORP | COHR | 19247G107 | $63.9K | 0.56% | 268,451 | SH |
| 41 | PIPER SANDLER COS | PIPR | 724078209 | $63.9K | 0.56% | 834,827 | SH |
| 42 | ENTERGY CORP | ETR | 29364G103 | $63.9K | 0.56% | 568,684 | SH |
| 43 | ELEMENT SOLUTIONS INC | ESI | 28618M106 | $63.7K | 0.56% | 1,866,318 | SH |
| 44 | JAZZ PHARMACEUTICALS PLC | JAZZ | G50871105 | $63.7K | 0.56% | 336,893 | SH |
| 45 | FABRINET | FN | G3323L100 | $63.3K | 0.56% | 121,330 | SH |
| 46 | SITEONE LANDSCAPE SUPPLY INC | SITE | 82982L103 | $63.2K | 0.56% | 474,661 | SH |
| 47 | JPMORGAN CHASE & CO | JPM | 46625H100 | $63.1K | 0.56% | 214,533 | SH |
| 48 | CITIZENS FINANCIAL GROUP | CFG | 174610105 | $63.0K | 0.56% | 1,050,635 | SH |
| 49 | RPM INTERNATIONAL INC | RPM | 749685103 | $59.7K | 0.53% | 600,578 | SH |
| 50 | GLACIER BANCORP INC | GBCI | 37637Q105 | $58.1K | 0.51% | 1,300,079 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-13 | $11.3M | 1,197 | 0001082917-26-000002 |
| 2025-12-31 | 2026-02-11 | $11.6M | 1,178 | 0001082917-26-000001 |
| 2025-09-30 | 2025-11-12 | $11.3M | 1,179 | 0001082917-25-000007 |