Frontier Capital Management Co. LLC
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 14, 2025), Frontier Capital Management Co. LLC reported 297 stock positions worth $11.2 billion. Its top holding was Ftai Aviation (FTAI) at 2.7% of the portfolio, followed by Eagle Materials (EXP, 2.0%) and Teradyne (TER, 1.8%). Compared with Q2 2025, it opened 24 new positions, sold out of 21, added to 122 and reduced 151. The biggest buy was Teradyne (TER, shares +142%) and the biggest sale Mattel (MAT, shares −44%).
- Most Recent 13F
- Q2 2026
- Location
- Boston, MA
- CIK
- 0000351173
- Portfolio Value
- $11.2B (Q3 2025)
- SEC Filing
- 0001172661-25-004908 ↗ filed Nov 14, 2025
Holdings Value
Holdings 297 stocks · $11.2B
| FTAI Ftai Aviation Ltd. | 2.73% | 1,822,760 | $304.1M | Reduce -15.0% |
| EXP Eagle Materials Inc. | 1.97% | 943,683 | $219.9M | Add +13.7% |
| TER Teradyne Inc. | 1.76% | 1,426,648 | $196.4M | Add +141.9% |
| BLDR Builders Firstsource Inc. | 1.40% | 1,290,648 | $156.5M | Add +114.7% |
| MPWR Monolithic Power Systems Inc. | 1.35% | 163,916 | $150.9M | Add +23.4% |
| COHR Coherent Corp. | 1.32% | 1,370,940 | $147.7M | Add +88.0% |
| XPO Xpo Inc. | 1.29% | 1,111,588 | $143.7M | Reduce -2.0% |
| GVA Granite Construction Inc. | 1.27% | 1,297,017 | $142.2M | Reduce -5.3% |
| CG The Carlyle Group Inc. | 1.24% | 2,203,897 | $138.2M | Add +16.8% |
| ENTG Entegris Inc. | 1.23% | 1,481,594 | $137.0M | Add +124.7% |
| BPOP Popular Inc. | 1.23% | 1,076,269 | $136.7M | Reduce -0.5% |
| MKSI MKS Inc. | 1.20% | 1,080,763 | $133.8M | Add +18.5% |
| ATI Ati Inc. | 1.13% | 1,554,561 | $126.4M | Reduce -30.1% |
| AMTM Amentum Holdings Inc. | 1.12% | 5,202,680 | $124.6M | Reduce -4.7% |
| RCL Royal Caribbean Cruises Ltd. | 1.03% | 353,891 | $114.5M | New |
| VRT Vertiv Holdings Co. Class A | 0.96% | 712,641 | $107.5M | Add +3.2% |
| VST Vistra Corp. | 0.95% | 539,134 | $105.6M | Add +63.6% |
| APP AppLovin Corp. Class A | 0.92% | 142,788 | $102.6M | Reduce -17.2% |
| SIMO Silicon Motion Technol-ADR | 0.89% | 1,043,094 | $98.9M | Reduce -18.6% |
| SANM Sanmina Corp. | 0.82% | 792,078 | $91.2M | Reduce -35.7% |
| LNG Cheniere Energy Inc. | 0.80% | 381,528 | $89.7M | Reduce -8.5% |
| ALK Alaska Air Group Inc. | 0.80% | 1,789,020 | $89.1M | Add +77.3% |
| MDB Mongodb Inc. | 0.79% | 284,704 | $88.4M | Reduce -22.9% |
| DAR Darling Ingredients Inc. | 0.79% | 2,848,900 | $87.9M | Reduce -14.3% |
| RBLX Roblox Corp. Class A | 0.79% | 633,275 | $87.7M | Reduce -1.5% |
| MAT Mattel Inc. | 0.75% | 4,987,395 | $83.9M | Reduce -44.5% |
| UCTT Ultra Clean Holdings Inc. | 0.74% | 3,033,270 | $82.7M | Add +10.1% |
| CWK Cushman & Wakefield UK Holdc | 0.70% | 4,938,347 | $78.6M | Add +5.6% |
| VEEV Veeva Systems Inc. Class A | 0.70% | 262,557 | $78.2M | Add +10.4% |
| RNST Renasant Corp. | 0.70% | 2,115,034 | $78.0M | Add +86.0% |
| LSCC Lattice Semiconductor Corp. | 0.69% | 1,046,180 | $76.7M | Reduce -2.4% |
| DBRG Digitalbridge Group Inc. | 0.68% | 6,455,013 | $75.5M | Add +13.9% |
| INDI Indie Semiconductor Inc. Class A | 0.66% | 18,010,912 | $73.3M | Add +0.3% |
| UTHR United Therapeutics Corp. | 0.65% | 173,948 | $72.9M | Reduce -12.4% |
| WTFC Wintrust Financial Corp. | 0.64% | 540,850 | $71.6M | Add +4.7% |
| U Unity Software Inc. | 0.64% | 1,788,925 | $71.6M | Reduce -16.3% |
| P Everpure Inc. Class A filed as PURE STORAGE INC | 0.64% | 853,770 | $71.6M | Add +0.5% |
| CELH Celsius Holdings Inc. | 0.64% | 1,232,664 | $70.9M | Add +116.6% |
| IDXX Idexx Laboratories Inc. | 0.62% | 108,302 | $69.2M | Reduce -0.7% |
| FBP First Bancorp Puerto Rico | 0.61% | 3,074,754 | $67.8M | Add +5.6% |
| PRDO Perdoceo Education Corp. | 0.61% | 1,795,023 | $67.6M | Add +2.4% |
| MRVL Marvell Technology Inc. | 0.60% | 799,592 | $67.2M | Add +25.3% |
| FR First Industrial Realty TR | 0.60% | 1,291,041 | $66.4M | Reduce -1.7% |
| SILA Sila Realty Trust Inc. | 0.59% | 2,622,504 | $65.8M | Add +3.6% |
| NET Cloudflare Inc. Class A | 0.59% | 305,974 | $65.7M | Add +12.2% |
| ADC Agree Realty Corp. | 0.59% | 923,976 | $65.6M | Reduce -10.9% |
| GWRE Guidewire Software Inc. | 0.58% | 281,544 | $64.7M | Add +33.1% |
| APH Amphenol Corp. Class A | 0.55% | 495,116 | $61.3M | Reduce -2.1% |
| BURL Burlington Stores Inc. | 0.54% | 236,989 | $60.3M | Reduce -8.4% |
| LCII Lci Industries | 0.53% | 639,445 | $59.6M | Add +26.7% |
| NTRA Natera Inc. | 0.53% | 369,014 | $59.4M | Reduce -4.1% |
| MOD Modine Manufacturing Co. | 0.53% | 417,742 | $59.4M | Reduce -0.1% |
| RRX Regal Rexnord Corp. | 0.53% | 411,078 | $59.0M | Reduce -20.6% |
| KBR KBR Inc. | 0.53% | 1,239,470 | $58.6M | Add +54.5% |
| AGCO Agco Corp. | 0.52% | 546,739 | $58.5M | Add +46.4% |
| ELAN Elanco Animal Health Inc. | 0.52% | 2,880,677 | $58.0M | Add +7.7% |
| XYZ Block Inc. | 0.51% | 790,156 | $57.1M | Reduce -39.1% |
| ZS Zscaler Inc. | 0.50% | 186,268 | $55.8M | Reduce -8.5% |
| IRT Independence Realty Trust Inc. | 0.50% | 3,385,424 | $55.5M | Reduce -2.8% |
| TSCO Tractor Supply Company | 0.50% | 972,791 | $55.3M | Add +61.2% |
| STAG Stag Industrial Inc. | 0.49% | 1,563,238 | $55.2M | Reduce -1.6% |
| TRU Transunion | 0.49% | 653,188 | $54.7M | Reduce -6.5% |
| EBC Eastern Bankshares Inc. | 0.49% | 2,987,563 | $54.2M | Add +8.0% |
| ALNY Alnylam Pharmaceuticals Inc. | 0.49% | 118,878 | $54.2M | Add +15.4% |
| FAF First American Financial | 0.48% | 841,032 | $54.0M | Add +8.5% |
| MDU Mdu Resources Group Inc. | 0.48% | 2,991,976 | $53.3M | Add +7.2% |
| SNX TD Synnex Corp. | 0.48% | 325,267 | $53.3M | Add +4.1% |
| PWR Quanta Services Inc. | 0.48% | 128,183 | $53.1M | Reduce -28.4% |
| DKNG Draftkings Inc. Class A | 0.48% | 1,419,515 | $53.1M | Add +1.3% |
| DLB Dolby Laboratories Inc. Class A | 0.47% | 726,866 | $52.6M | Reduce -41.3% |
| BDC Belden Inc. | 0.47% | 431,724 | $51.9M | Add +0.8% |
| CGNX Cognex Corp. | 0.47% | 1,145,562 | $51.9M | Add +645.1% |
| TDW Tidewater Inc. | 0.46% | 965,334 | $51.5M | Add +29.7% |
| ROL Rollins Inc. | 0.46% | 867,836 | $51.0M | Reduce -0.8% |
| EPRT Essential Properties Realty | 0.45% | 1,675,964 | $49.9M | Reduce -24.3% |
| CVSA Covista Inc. filed as ADTALEM GLOBAL ED INC | 0.45% | 322,159 | $49.8M | Add +4.0% |
| AON Aon PLC Class A | 0.45% | 139,453 | $49.7M | Reduce -25.4% |
| WFRD Weatherford International PL | 0.44% | 720,643 | $49.3M | Add +1.8% |
| WBS Webster Financial Corp. | 0.43% | 807,529 | $48.0M | Add +4.0% |
| INSM Insmed Inc. | 0.42% | 328,884 | $47.4M | Add +122.5% |
| DXCM Dexcom Inc. | 0.42% | 688,694 | $46.3M | Reduce -26.1% |
| PSN Parsons Corp. | 0.41% | 549,931 | $45.6M | Add +7.7% |
| PR Permian Resources Corp. Class A | 0.40% | 3,521,266 | $45.1M | Reduce -12.9% |
| EFX Equifax Inc. | 0.40% | 174,021 | $44.6M | Reduce -5.3% |
| STE Steris PLC | 0.40% | 179,567 | $44.4M | Reduce -25.6% |
| NMIH Nmi Holdings Inc. filed as NMI HLDGS INC | 0.40% | 1,157,431 | $44.4M | Add +3.4% |
| TKR Timken Co. | 0.39% | 584,582 | $43.9M | Reduce -23.8% |
| WSFS WSFS Financial Corp. | 0.39% | 799,562 | $43.1M | Add +4.1% |
| RMD Resmed Inc. | 0.38% | 156,868 | $42.9M | Reduce -13.6% |
| LHX L3HARRIS Technologies Inc. | 0.38% | 138,940 | $42.4M | Reduce -8.5% |
| JBL Jabil Inc. | 0.37% | 192,000 | $41.7M | Reduce -36.5% |
| ABG Asbury Automotive Group | 0.37% | 169,786 | $41.5M | Add +9.2% |
| CSGP Costar Group Inc. | 0.37% | 490,623 | $41.4M | Reduce -7.0% |
| GENI Genius Sports Ltd. | 0.37% | 3,334,257 | $41.3M | Add +143.8% |
| ALGN Align Technology Inc. | 0.37% | 329,420 | $41.2M | Add +47.0% |
| PGY Pagaya Technologies Ltd. Class A | 0.37% | 1,383,195 | $41.1M | Reduce -46.3% |
| HXL Hexcel Corp. | 0.37% | 652,673 | $40.9M | Reduce -28.3% |
| LW Lamb Weston Holdings Inc. | 0.37% | 703,193 | $40.8M | Add +36.4% |
| RKLB Rocket Lab Corp. | 0.36% | 830,197 | $39.8M | New |
| CACI Caci International Inc. Class A | 0.35% | 79,303 | $39.6M | Reduce -8.8% |
Portfolio Sells Q2 2025 → Q3 2025
| MAT Mattel Inc. | Reduce -44.5% | 0.75% | −0.89 |
| INSP Inspire Medical Systems Inc. | Reduce -76.6% | 0.11% | −0.72 |
| TWLO Twilio Inc. Class A | Reduce -73.9% | 0.17% | −0.67 |
| ATI Ati Inc. | Reduce -30.1% | 1.13% | −0.65 |
| MRC MRC Global Inc. | Sold out | 0.00% | −0.57 |
| BFAM Bright Horizons Family Solut | Reduce -89.3% | 0.05% | −0.54 |
| PNFP Pinnacle Financial Partners | Sold out | 0.00% | −0.54 |
| ALGM Allegro Microsystems Inc. | Reduce -62.1% | 0.23% | −0.51 |
| CRS Carpenter Technology | Reduce -51.4% | 0.35% | −0.49 |
| KNX Knight-Swift Transportation | Reduce -60.5% | 0.24% | −0.47 |
| PLTR Palantir Technologies Inc. Class A | Sold out | 0.00% | −0.45 |
| GTLS Chart Industries Inc. | Sold out | 0.00% | −0.40 |
| DLB Dolby Laboratories Inc. Class A | Reduce -41.3% | 0.47% | −0.38 |
| DAR Darling Ingredients Inc. | Reduce -14.3% | 0.79% | −0.38 |
| DXCM Dexcom Inc. | Reduce -26.1% | 0.42% | −0.34 |
| FTNT Fortinet Inc. | Reduce -45.4% | 0.23% | −0.32 |
| LTH Life Time Group Holdings Inc. | Reduce -47.0% | 0.27% | −0.31 |
| FICO Fair Isaac Corp. | Reduce -42.9% | 0.25% | −0.31 |
| XYZ Block Inc. | Reduce -39.1% | 0.51% | −0.30 |
| SANM Sanmina Corp. | Reduce -35.7% | 0.82% | −0.30 |
| EPAM Epam Systems Inc. | Reduce -49.9% | 0.21% | −0.30 |
| ALC Alcon Inc. | Reduce -46.0% | 0.19% | −0.24 |
| LNTH Lantheus Holdings Inc. | Sold out | 0.00% | −0.24 |
| JBL Jabil Inc. | Reduce -36.5% | 0.37% | −0.24 |
| PLNT Planet Fitness Inc. Class A | Reduce -41.8% | 0.27% | −0.23 |
| TEM Tempus AI Inc. Class A | Reduce -72.1% | 0.12% | −0.23 |
| TTD Trade Desk Inc./the Class A | Reduce -17.7% | 0.25% | −0.21 |
| EPRT Essential Properties Realty | Reduce -24.3% | 0.45% | −0.21 |
| DDOG Datadog Inc. Class A | Reduce -47.0% | 0.25% | −0.21 |
| CTSH Cognizant Tech Solutions-A | Sold out | 0.00% | −0.20 |
| HUBS HubSpot Inc. | Reduce -21.5% | 0.35% | −0.20 |
| CRDO Credo Technology Group Holdi | Reduce -70.1% | 0.17% | −0.20 |
| BJ Bj's Wholesale Club Holdings | Reduce -97.0% | 0.01% | −0.19 |
| APO Apollo Global Management Inc. | Reduce -52.9% | 0.14% | −0.19 |
| PRCT Procept Biorobotics Corp. | Reduce -74.8% | 0.03% | −0.19 |
| MGNI Magnite Inc. | Reduce -39.1% | 0.21% | −0.19 |
| STRL Sterling Infrastructure Inc. | Reduce -68.8% | 0.15% | −0.18 |
| ALAB Astera Labs Inc. | Reduce -99.3% | 0.00% | −0.18 |
| LAD Lithia Motors Inc. | Reduce -31.6% | 0.30% | −0.18 |
| AON Aon PLC Class A | Reduce -25.4% | 0.45% | −0.17 |
| RRX Regal Rexnord Corp. | Reduce -20.6% | 0.53% | −0.17 |
| FARO Faro Technologies Inc. | Sold out | 0.00% | −0.16 |
| VKTX Viking Therapeutics Inc. | Sold out | 0.00% | −0.16 |
| PWR Quanta Services Inc. | Reduce -28.4% | 0.48% | −0.15 |
| GMS GMS Inc. | Sold out | 0.00% | −0.15 |
| ECG Everus Construction Group | Reduce -57.2% | 0.18% | −0.14 |
| PGY Pagaya Technologies Ltd. Class A | Reduce -46.3% | 0.37% | −0.14 |
| STE Steris PLC | Reduce -25.6% | 0.40% | −0.14 |
| ACVA Acv Auctions Inc. Class A | Reduce -12.3% | 0.15% | −0.14 |
| LNG Cheniere Energy Inc. | Reduce -8.5% | 0.80% | −0.14 |
Portfolio Buys Q2 2025 → Q3 2025
| TER Teradyne Inc. | Add +141.9% | 1.76% | +1.27 |
| RCL Royal Caribbean Cruises Ltd. | New | 1.03% | +1.03 |
| BLDR Builders Firstsource Inc. | Add +114.7% | 1.40% | +0.75 |
| ENTG Entegris Inc. | Add +124.7% | 1.23% | +0.74 |
| COHR Coherent Corp. | Add +88.0% | 1.32% | +0.72 |
| MPWR Monolithic Power Systems Inc. | Add +23.4% | 1.35% | +0.45 |
| CGNX Cognex Corp. | Add +645.1% | 0.47% | +0.42 |
| EXP Eagle Materials Inc. | Add +13.7% | 1.97% | +0.42 |
| CELH Celsius Holdings Inc. | Add +116.6% | 0.64% | +0.39 |
| MKSI MKS Inc. | Add +18.5% | 1.20% | +0.36 |
| RKLB Rocket Lab Corp. | New | 0.36% | +0.36 |
| VST Vistra Corp. | Add +63.6% | 0.95% | +0.36 |
| IONQ Ionq Inc. | New | 0.35% | +0.35 |
| CG The Carlyle Group Inc. | Add +16.8% | 1.24% | +0.34 |
| ALK Alaska Air Group Inc. | Add +77.3% | 0.80% | +0.34 |
| RNST Renasant Corp. | Add +86.0% | 0.70% | +0.32 |
| AIR Aar Corp. | New | 0.30% | +0.30 |
| INSM Insmed Inc. | Add +122.5% | 0.42% | +0.29 |
| ALGT Allegiant Travel Co. | New | 0.28% | +0.28 |
| GENI Genius Sports Ltd. | Add +143.8% | 0.37% | +0.24 |
| FBK FB Financial Corp. | New | 0.24% | +0.24 |
| FND Floor & Decor Holdings Inc. Class A | New | 0.24% | +0.24 |
| CWK Cushman & Wakefield UK Holdc | Add +5.6% | 0.70% | +0.23 |
| TFIN Triumph Financial Inc. | New | 0.22% | +0.22 |
| ROCK Gibraltar Industries Inc. | New | 0.21% | +0.21 |
| AVTR Avantor Inc. | Add +289.5% | 0.28% | +0.20 |
| TSCO Tractor Supply Company | Add +61.2% | 0.50% | +0.20 |
| P Everpure Inc. Class A | Add +0.5% | 0.64% | +0.19 |
| SAIA Saia Inc. | Add +132.7% | 0.32% | +0.19 |
| INOD Innodata Inc. | New | 0.19% | +0.19 |
| ASH Ashland Inc. | New | 0.18% | +0.18 |
| SBCF Seacoast Banking Corp. | New | 0.18% | +0.18 |
| ALNY Alnylam Pharmaceuticals Inc. | Add +15.4% | 0.49% | +0.17 |
| KBR KBR Inc. | Add +54.5% | 0.53% | +0.17 |
| AGCO Agco Corp. | Add +46.4% | 0.52% | +0.17 |
| ELAN Elanco Animal Health Inc. | Add +7.7% | 0.52% | +0.17 |
| UCTT Ultra Clean Holdings Inc. | Add +10.1% | 0.74% | +0.17 |
| MHO M/I Homes Inc. | New | 0.16% | +0.16 |
| SON Sonoco Products Co. | New | 0.16% | +0.16 |
| MRVL Marvell Technology Inc. | Add +25.3% | 0.60% | +0.15 |
| TDW Tidewater Inc. | Add +29.7% | 0.46% | +0.14 |
| VRT Vertiv Holdings Co. Class A | Add +3.2% | 0.96% | +0.14 |
| GTX Garrett Motion Inc. | Add +71.6% | 0.26% | +0.14 |
| DBRG Digitalbridge Group Inc. | Add +13.9% | 0.68% | +0.13 |
| TMDX Transmedics Group Inc. | Add +199.0% | 0.22% | +0.13 |
| LUNR Intuitive Machines Inc. | New | 0.12% | +0.12 |
| GWRE Guidewire Software Inc. | Add +33.1% | 0.58% | +0.12 |
| LW Lamb Weston Holdings Inc. | Add +36.4% | 0.37% | +0.12 |
| FLYW Flywire Corp.-Voting | New | 0.12% | +0.12 |
| WFRD Weatherford International PL | Add +1.8% | 0.44% | +0.11 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 300 | $10.7B | FTAI, GVA, ALK, AAOI, AKAM |
| Q1 2026 | 291 | $9.7B | FTAI, DAR, UTHR, CRCL, GVA |
| Q4 2025 | 295 | $9.4B | FTAI, AMTM, GVA, ATI, MDB |
| Q3 2025 | 297 | $11.2B | FTAI, EXP, TER, BLDR, MPWR |
| Q2 2025 | 294 | $10.8B | FTAI, ATI, MAT, EXP, XPO |
| Q1 2025 | 283 | $9.1B | FTAI, BECN, MAT, EXP, ATI |
| Q4 2024 | 285 | $10.5B | FTAI, BECN, ATI, XPO, EXP |
| Q3 2024 | 281 | $10.6B | FTAI, EXP, ATI, BECN, MAT |
| Q2 2024 | 279 | $10.1B | FTAI, BECN, ATI, UCTT, EXP |
| Q1 2024 | 269 | $10.7B | FTAI, EXP, XPO, BECN, BLDR |