Frontier Capital Management Co. LLC
In its 13F for Q2 2026 (holdings as of June 30, 2026, filed August 14, 2026), Frontier Capital Management Co. LLC reported 300 stock positions worth $10.7 billion. Its top holding was Ftai Aviation (FTAI) at 3.0% of the portfolio, followed by Granite Construction (GVA, 1.6%) and Alaska Air (ALK, 1.6%). Compared with Q1 2026, it opened 33 new positions, sold out of 24, added to 96 and reduced 171. The biggest buy was Applied Optoelectronics (AAOI, shares +243%) and the biggest sale Darling Ingredients (DAR, shares −68%).
- Most Recent 13F
- Q2 2026
- Location
- Boston, MA
- CIK
- 0000351173
- Portfolio Value
- $10.7B (Q2 2026)
- SEC Filing
- 0001172661-26-003509 ↗ filed Aug 14, 2026
Holdings Value
Holdings 300 stocks · $10.7B
| FTAI Ftai Aviation Ltd. | 2.98% | 1,183,492 | $320.2M | Add +11.4% |
| GVA Granite Construction Inc. | 1.65% | 1,118,881 | $176.9M | Reduce -5.8% |
| ALK Alaska Air Group Inc. | 1.65% | 3,384,643 | $176.7M | Add +0.3% |
| AAOI Applied Optoelectronics Inc. | 1.35% | 975,318 | $144.5M | Add +243.3% |
| AKAM Akamai Technologies Inc. | 1.25% | 1,136,573 | $134.4M | Add +9.7% |
| ASH Ashland Inc. | 1.23% | 1,999,908 | $131.8M | Add +4.6% |
| LSCC Lattice Semiconductor Corp. | 1.17% | 821,848 | $125.7M | Add +35.8% |
| BPOP Popular Inc. | 1.11% | 725,227 | $119.1M | Reduce -9.4% |
| MDB Mongodb Inc. | 1.05% | 334,098 | $112.2M | Add +55.9% |
| UTHR United Therapeutics Corp. | 1.04% | 206,808 | $112.1M | Reduce -18.2% |
| KNX Knight-Swift Transportation | 1.02% | 1,410,955 | $109.9M | Reduce -32.4% |
| EXP Eagle Materials Inc. | 0.96% | 458,621 | $103.2M | Reduce -24.9% |
| LRN Stride Inc. | 0.96% | 1,191,710 | $102.8M | Reduce -23.1% |
| XPO Xpo Inc. | 0.96% | 499,601 | $102.6M | Reduce -23.4% |
| BBIO Bridgebio Pharma Inc. | 0.95% | 1,373,057 | $102.3M | Add +43.3% |
| LBRT Liberty Energy Inc. | 0.91% | 3,720,666 | $97.4M | Add +49.2% |
| SANM Sanmina Corp. | 0.89% | 378,111 | $95.7M | Reduce -40.7% |
| UCTT Ultra Clean Holdings Inc. | 0.89% | 667,532 | $95.2M | Reduce -62.6% |
| RARE Ultragenyx Pharmaceutical Inc. | 0.89% | 2,847,936 | $95.1M | Add +30.0% |
| PODD Insulet Corp. | 0.88% | 622,506 | $94.8M | Add +260.9% |
| MOD Modine Manufacturing Co. | 0.86% | 343,868 | $91.8M | Add +68.5% |
| FLS Flowserve Corp. | 0.85% | 1,233,291 | $91.5M | Add +166.7% |
| KEX Kirby Corp. | 0.84% | 666,554 | $90.6M | Add +3.5% |
| ALGT Allegiant Travel Co. | 0.84% | 765,347 | $90.0M | Add +27.3% |
| P Everpure Inc. Class A | 0.82% | 1,120,040 | $88.2M | Add +18.6% |
| AMTM Amentum Holdings Inc. | 0.80% | 4,143,971 | $85.7M | Reduce -15.9% |
| KYMR Kymera Therapeutics Inc. | 0.79% | 740,866 | $85.0M | Reduce -2.5% |
| INSM Insmed Inc. | 0.79% | 795,242 | $84.8M | Add +69.4% |
| ATI Ati Inc. | 0.77% | 419,968 | $82.8M | Reduce -39.5% |
| RNST Renasant Corp. | 0.71% | 1,778,953 | $75.7M | Add +4.5% |
| ALAB Astera Labs Inc. | 0.70% | 154,601 | $74.7M | Reduce -77.5% |
| RCL Royal Caribbean Cruises Ltd. | 0.69% | 233,963 | $74.3M | Reduce -1.8% |
| PVLA Palvella Therapeutics Inc. | 0.68% | 478,833 | $73.2M | Add +28.0% |
| DT Dynatrace Inc. | 0.67% | 1,635,587 | $71.8M | New |
| INDI Indie Semiconductor Inc. Class A | 0.67% | 15,914,169 | $71.5M | Reduce -17.3% |
| ADC Agree Realty Corp. | 0.67% | 943,005 | $71.4M | Reduce -14.4% |
| LUNR Intuitive Machines Inc. | 0.63% | 3,173,434 | $67.9M | Reduce -9.7% |
| JAZZ Jazz Pharmaceuticals PLC | 0.62% | 277,279 | $66.8M | Reduce -46.4% |
| SAIA Saia Inc. | 0.59% | 151,477 | $63.8M | Reduce -17.0% |
| ENTG Entegris Inc. | 0.59% | 351,950 | $63.3M | Reduce -53.4% |
| FBP First Bancorp Puerto Rico | 0.59% | 2,422,265 | $63.1M | Reduce -17.1% |
| CRCL Circle Internet Group Inc. | 0.59% | 1,004,783 | $62.9M | Reduce -35.1% |
| HUBB Hubbell Inc. | 0.59% | 119,997 | $62.8M | Add +378.7% |
| AXSM Axsome Therapeutics Inc. | 0.58% | 254,280 | $62.2M | Add +25.2% |
| FLEX Flex Ltd. | 0.58% | 382,135 | $61.9M | Add +5.7% |
| WTFC Wintrust Financial Corp. | 0.58% | 384,593 | $61.8M | Reduce -16.8% |
| TDW Tidewater Inc. | 0.56% | 894,796 | $59.6M | Reduce -16.6% |
| ATMU Atmus Filtration Technologie | 0.55% | 1,157,930 | $59.0M | Add +56.0% |
| JBL Jabil Inc. | 0.55% | 152,187 | $58.7M | Reduce -7.7% |
| BLDR Builders Firstsource Inc. | 0.54% | 651,389 | $58.3M | Reduce -24.3% |
| SNOW Snowflake Inc. | 0.54% | 226,439 | $57.6M | Add +217.6% |
| TRVI Trevi Therapeutics Inc. | 0.53% | 3,070,740 | $57.3M | Add +54.0% |
| GENI Genius Sports Ltd. | 0.53% | 9,432,864 | $57.2M | Add +89.9% |
| BWIN Baldwin Insurance Group Inc./ filed as THE BALDWIN INSURANCE GRP IN | 0.52% | 2,097,658 | $55.8M | Add +90.3% |
| VERA Vera Therapeutics Inc. | 0.52% | 1,295,405 | $55.6M | Add +134.9% |
| URGN Urogen Pharma Ltd. | 0.52% | 1,508,547 | $55.5M | Add +14.8% |
| MKSI MKS Inc. | 0.50% | 120,625 | $53.7M | Reduce -25.2% |
| GTX Garrett Motion Inc. | 0.50% | 1,466,821 | $53.1M | Reduce -45.2% |
| ELAN Elanco Animal Health Inc. | 0.49% | 2,138,550 | $52.6M | Reduce -9.5% |
| EBC Eastern Bankshares Inc. | 0.48% | 2,332,022 | $51.9M | Reduce -17.9% |
| FAF First American Financial | 0.48% | 749,097 | $51.4M | Reduce -14.9% |
| APG Api Group Corp. | 0.48% | 1,203,831 | $51.0M | Add +120.2% |
| STAG Stag Industrial Inc. | 0.47% | 1,331,842 | $50.7M | Reduce -11.3% |
| WFRD Weatherford International PL | 0.47% | 617,390 | $50.3M | Reduce -14.9% |
| AIR Aar Corp. | 0.47% | 350,441 | $50.1M | Reduce -18.0% |
| CRS Carpenter Technology | 0.46% | 80,488 | $49.6M | Reduce -18.8% |
| PRDO Perdoceo Education Corp. | 0.46% | 1,547,631 | $49.5M | Reduce -16.2% |
| ACHC Acadia Healthcare Co. Inc. | 0.46% | 1,672,857 | $49.4M | Add +190.8% |
| CGNX Cognex Corp. | 0.45% | 669,588 | $48.5M | Reduce -3.5% |
| FR First Industrial Realty TR | 0.45% | 788,792 | $48.4M | Reduce -16.6% |
| DDOG Datadog Inc. Class A | 0.44% | 182,164 | $47.4M | Add +95.0% |
| NTRA Natera Inc. | 0.44% | 173,547 | $47.1M | Reduce -41.0% |
| PRIM Primoris Services Corp. | 0.43% | 468,762 | $46.5M | New |
| AR Antero Resources Corp. | 0.43% | 1,318,103 | $46.3M | Reduce -2.3% |
| FICO Fair Isaac Corp. | 0.43% | 38,278 | $45.7M | Add +21.6% |
| MPWR Monolithic Power Systems Inc. | 0.42% | 32,723 | $45.2M | Reduce -58.9% |
| TFIN Triumph Financial Inc. | 0.42% | 584,333 | $44.6M | Reduce -9.4% |
| DAR Darling Ingredients Inc. | 0.40% | 793,866 | $43.4M | Reduce -67.7% |
| SARO Standardaero Inc. | 0.40% | 1,449,333 | $43.3M | New |
| VOYG Voyager Technologies Inc. Class A | 0.40% | 1,343,054 | $43.3M | Add +9.4% |
| SNX TD Synnex Corp. | 0.40% | 161,933 | $43.3M | Reduce -44.8% |
| CHE Chemed Corp. | 0.39% | 90,567 | $42.2M | Add +44.4% |
| MDU Mdu Resources Group Inc. | 0.39% | 1,987,666 | $42.2M | Reduce -20.7% |
| RRX Regal Rexnord Corp. | 0.39% | 176,675 | $42.1M | Reduce -18.9% |
| PGY Pagaya Technologies Ltd. Class A | 0.39% | 2,296,417 | $41.9M | Add +1067.5% |
| ACVA Acv Auctions Inc. Class A | 0.39% | 5,813,660 | $41.8M | Add +48.0% |
| KBR KBR Inc. | 0.39% | 1,206,062 | $41.6M | Reduce -15.9% |
| RYZ Ryerson Holding Corp. | 0.39% | 1,683,408 | $41.4M | Add +11.0% |
| ERO Ero Copper Corp. | 0.38% | 1,540,063 | $41.2M | Add +23.1% |
| NSIT Insight Enterprises Inc. | 0.38% | 337,686 | $41.1M | Reduce -33.2% |
| WSFS WSFS Financial Corp. | 0.38% | 535,179 | $41.1M | Reduce -20.8% |
| TER Teradyne Inc. | 0.38% | 84,563 | $40.9M | Reduce -53.8% |
| GPOR Gulfport Energy Corp. | 0.38% | 240,790 | $40.9M | Add +8.5% |
| SBCF Seacoast Banking Corp. | 0.38% | 1,227,771 | $40.8M | Add +22.9% |
| CRDO Credo Technology Group Holdi | 0.38% | 149,509 | $40.7M | Add +33.2% |
| NET Cloudflare Inc. Class A | 0.38% | 165,415 | $40.6M | Add +5.2% |
| APGE Apogee Therapeutics Inc. | 0.38% | 303,739 | $40.3M | Reduce -71.5% |
| LMND Lemonade Inc. | 0.37% | 609,820 | $39.7M | Reduce -9.3% |
| IRT Independence Realty Trust Inc. | 0.37% | 2,376,740 | $39.7M | Reduce -17.2% |
| PWR Quanta Services Inc. | 0.36% | 54,069 | $38.9M | Reduce -5.0% |
Portfolio Sells Q1 2026 → Q2 2026
| DAR Darling Ingredients Inc. | Reduce -67.7% | 0.40% | −1.16 |
| CRCL Circle Internet Group Inc. | Reduce -35.1% | 0.59% | −0.93 |
| MRVL Marvell Technology Inc. | Sold out | 0.00% | −0.55 |
| SILA Sila Realty Trust Inc. | Reduce -86.0% | 0.11% | −0.55 |
| APGE Apogee Therapeutics Inc. | Reduce -71.5% | 0.38% | −0.55 |
| AMTM Amentum Holdings Inc. | Reduce -15.9% | 0.80% | −0.52 |
| UTHR United Therapeutics Corp. | Reduce -18.2% | 1.04% | −0.50 |
| MPWR Monolithic Power Systems Inc. | Reduce -58.9% | 0.42% | −0.47 |
| LRN Stride Inc. | Reduce -23.1% | 0.96% | −0.45 |
| BURL Burlington Stores Inc. | Reduce -56.3% | 0.28% | −0.45 |
| NUVL Nuvalent Inc. Class A | Sold out | 0.00% | −0.42 |
| DIOD Diodes Inc. | Sold out | 0.00% | −0.42 |
| JAZZ Jazz Pharmaceuticals PLC | Reduce -46.4% | 0.62% | −0.38 |
| TDW Tidewater Inc. | Reduce -16.6% | 0.56% | −0.37 |
| XPO Xpo Inc. | Reduce -23.4% | 0.96% | −0.35 |
| ENTG Entegris Inc. | Reduce -53.4% | 0.59% | −0.32 |
| GWRE Guidewire Software Inc. | Reduce -72.6% | 0.08% | −0.32 |
| SIMO Silicon Motion Technol-ADR | Reduce -99.0% | 0.01% | −0.31 |
| QDEL Quidelortho Corp. | Sold out | 0.00% | −0.30 |
| COHU Cohu Inc. | Reduce -84.5% | 0.14% | −0.27 |
| BDC Belden Inc. | Reduce -47.2% | 0.27% | −0.27 |
| ATI Ati Inc. | Reduce -39.5% | 0.77% | −0.27 |
| ALGN Align Technology Inc. | Reduce -72.5% | 0.09% | −0.26 |
| UCTT Ultra Clean Holdings Inc. | Reduce -62.6% | 0.89% | −0.26 |
| PRDO Perdoceo Education Corp. | Reduce -16.2% | 0.46% | −0.24 |
| SIGI Selective Insurance Group | Reduce -51.3% | 0.32% | −0.24 |
| WFRD Weatherford International PL | Reduce -14.9% | 0.47% | −0.24 |
| TMDX Transmedics Group Inc. | Reduce -53.1% | 0.09% | −0.23 |
| MTDR Matador Resources Co. | Reduce -20.7% | 0.30% | −0.23 |
| DPZ Domino's Pizza Inc. | Sold out | 0.00% | −0.23 |
| EXP Eagle Materials Inc. | Reduce -24.9% | 0.96% | −0.23 |
| KNX Knight-Swift Transportation | Reduce -32.4% | 1.02% | −0.21 |
| LCII Lci Industries | Reduce -20.3% | 0.34% | −0.20 |
| ADC Agree Realty Corp. | Reduce -14.4% | 0.67% | −0.19 |
| PR Permian Resources Corp. Class A | Reduce -24.8% | 0.27% | −0.19 |
| BLDR Builders Firstsource Inc. | Reduce -24.3% | 0.54% | −0.18 |
| TER Teradyne Inc. | Reduce -53.8% | 0.38% | −0.18 |
| ECG Everus Construction Group | Sold out | 0.00% | −0.17 |
| ANET Arista Networks Inc. | Sold out | 0.00% | −0.17 |
| ROL Rollins Inc. | Reduce -67.4% | 0.05% | −0.17 |
| TSCO Tractor Supply Company | Sold out | 0.00% | −0.17 |
| NTRA Natera Inc. | Reduce -41.0% | 0.44% | −0.17 |
| APH Amphenol Corp. Class A | Sold out | 0.00% | −0.16 |
| DOCN Digitalocean Holdings Inc. | Reduce -63.2% | 0.25% | −0.16 |
| AR Antero Resources Corp. | Reduce -2.3% | 0.43% | −0.16 |
| KBR KBR Inc. | Reduce -15.9% | 0.39% | −0.16 |
| RVMD Revolution Medicines Inc. | Reduce -78.7% | 0.09% | −0.15 |
| DFIN Donnelley Financial Solution | Reduce -35.8% | 0.16% | −0.15 |
| RMD Resmed Inc. | Sold out | 0.00% | −0.15 |
| DLB Dolby Laboratories Inc. Class A | Reduce -68.7% | 0.05% | −0.15 |
Portfolio Buys Q1 2026 → Q2 2026
| AAOI Applied Optoelectronics Inc. | Add +243.3% | 1.35% | +1.10 |
| DT Dynatrace Inc. | New | 0.67% | +0.67 |
| LSCC Lattice Semiconductor Corp. | Add +35.8% | 1.17% | +0.59 |
| PODD Insulet Corp. | Add +260.9% | 0.88% | +0.51 |
| MDB Mongodb Inc. | Add +55.9% | 1.05% | +0.51 |
| FLS Flowserve Corp. | Add +166.7% | 0.85% | +0.50 |
| HUBB Hubbell Inc. | Add +378.7% | 0.59% | +0.46 |
| PRIM Primoris Services Corp. | New | 0.43% | +0.43 |
| SNOW Snowflake Inc. | Add +217.6% | 0.54% | +0.43 |
| RARE Ultragenyx Pharmaceutical Inc. | Add +30.0% | 0.89% | +0.41 |
| SARO Standardaero Inc. | New | 0.40% | +0.40 |
| MOD Modine Manufacturing Co. | Add +68.5% | 0.86% | +0.40 |
| ALK Alaska Air Group Inc. | Add +0.3% | 1.65% | +0.37 |
| PGY Pagaya Technologies Ltd. Class A | Add +1067.5% | 0.39% | +0.37 |
| ALGT Allegiant Travel Co. | Add +27.3% | 0.84% | +0.34 |
| FLEX Flex Ltd. | Add +5.7% | 0.58% | +0.33 |
| DDOG Datadog Inc. Class A | Add +95.0% | 0.44% | +0.33 |
| IONQ Ionq Inc. | Add +6169.1% | 0.33% | +0.33 |
| ACHC Acadia Healthcare Co. Inc. | Add +190.8% | 0.46% | +0.32 |
| ALKS Alkermes PLC | New | 0.32% | +0.32 |
| FTAI Ftai Aviation Ltd. | Add +11.4% | 2.98% | +0.31 |
| GENI Genius Sports Ltd. | Add +89.9% | 0.53% | +0.31 |
| ETOR Etoro Group Ltd. Class A | New | 0.31% | +0.31 |
| ST Sensata Technologies Holdplc | New | 0.29% | +0.29 |
| MANE Veradermics Inc. | New | 0.29% | +0.29 |
| UAMY United States Antimony Corp. | New | 0.29% | +0.29 |
| VERA Vera Therapeutics Inc. | Add +134.9% | 0.52% | +0.29 |
| TRVI Trevi Therapeutics Inc. | Add +54.0% | 0.53% | +0.29 |
| URGN Urogen Pharma Ltd. | Add +14.8% | 0.52% | +0.27 |
| MOH Molina Healthcare Inc. | New | 0.27% | +0.27 |
| BWIN Baldwin Insurance Group Inc./ | Add +90.3% | 0.52% | +0.27 |
| CRDO Credo Technology Group Holdi | Add +33.2% | 0.38% | +0.27 |
| HALO Halozyme Therapeutics Inc. | New | 0.25% | +0.25 |
| P Everpure Inc. Class A | Add +18.6% | 0.82% | +0.25 |
| APG Api Group Corp. | Add +120.2% | 0.48% | +0.25 |
| SXI Standex International Corp. | New | 0.25% | +0.25 |
| UMAC Unusual Machines Inc. | New | 0.24% | +0.24 |
| ZS Zscaler Inc. | Add +545.2% | 0.29% | +0.24 |
| CLYM Climb Bio Inc. | New | 0.24% | +0.24 |
| AXSM Axsome Therapeutics Inc. | Add +25.2% | 0.58% | +0.23 |
| BBIO Bridgebio Pharma Inc. | Add +43.3% | 0.95% | +0.22 |
| ACVA Acv Auctions Inc. Class A | Add +48.0% | 0.39% | +0.22 |
| PRCH Porch Group Inc. | New | 0.22% | +0.22 |
| PVLA Palvella Therapeutics Inc. | Add +28.0% | 0.68% | +0.20 |
| NBIS Nebius Group NV | New | 0.20% | +0.20 |
| VRSK Verisk Analytics Inc. | New | 0.20% | +0.20 |
| VIK Viking Holdings Ltd. | New | 0.19% | +0.19 |
| OLED Universal Display Corp. | Add +230.9% | 0.29% | +0.19 |
| TGTX TG Therapeutics Inc. | New | 0.19% | +0.19 |
| LITE Lumentum Holdings Inc. | New | 0.18% | +0.18 |
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 |