Frontier Capital Management Co LLC holds a diversified book of 291 stocks worth $9.7B as of Q1 2026 (disclosed May 15, 2026, a ~45-day 13F lag). This quarter they opened Antero Resources Corp and trimmed Ftai Aviation Ltd. Their largest long position is Ftai Aviation Ltd at 3% of the equity book.
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/351173/holdings"
Use Arkolith to show FRONTIER CAPITAL MANAGEMENT CO LLC's latest holdings, largest changes, and filing provenance.
Top-heavy: diversified book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
100% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Ftai Aviation Ltd SHS | $260.2M | 1.06M | 2.7% | ▼−18% Reduced · −234K sh | |
| 2 | Darling Ingredients Inc COM | $151.9M | 2.46M | 1.6% | ▼−9.7% Reduced · −265K sh | |
| 3 | United Therapeutics Corp Del COM | $149.8M | 252.7K | 1.5% | ▲+39% Added · +72K sh | |
| 4 | Circle Internet Group Inc COM CL A | $147.7M | 1.55M | 1.5% | ▲+37% Added · +418K sh | |
| 5 | Granite Constr Inc COM | $142.4M | 1.19M | 1.5% | ▼−5.6% Reduced · −70K sh | |
| 6 | Stride Inc COM | $136.6M | 1.55M | 1.4% | ▲+864% Added · +1.4M sh | |
| 7 | Amentum Holdings Inc COM | $128.6M | 4.93M | 1.3% | ▼−15% Reduced · −843K sh | |
| 8 | Xpo Inc COM | $126.9M | 652.1K | 1.3% | ▼−9.5% Reduced · −68K sh | |
| 9 | Alaska Air Group Inc COM | $124.1M | 3.37M | 1.3% | ▲+48% Added · +1.1M sh | |
| 10 | Knight-Swift Transn Hldgs In CL A | $120.1M | 2.09M | 1.2% | ▲+6.8% Added · +132K sh | |
| 11 | Akamai Technologies Inc COM | $119.0M | 1.04M | 1.2% | ▲+127% Added · +580K sh | |
| 12 | Eagle Matls Inc COM | $115.7M | 610.7K | 1.2% | ▲+12% Added · +65K sh | |
| 13 | Ultra Clean Hldgs Inc COM | $111.1M | 1.79M | 1.1% | ▼−49% Reduced · −1.7M sh | |
| 14 | Popular Inc COM NEW | $107.5M | 800.9K | 1.1% | ▼−16% Reduced · −153K sh | |
| 15 | Ashland Inc COM | $106.4M | 1.91M | 1.1% | ▲+34% Added · +487K sh | |
| 16 | Ati Inc COM | $101.0M | 694.4K | 1.0% | ▼−43% Reduced · −533K sh | |
| 17 | Jazz Pharmaceuticals PLC SHS USD | $97.8M | 517.3K | 1.0% | ▲+184% Added · +335K sh | |
| 18 | Tidewater Inc New COM | $89.6M | 1.07M | 0.9% | ▲+13% Added · +124K sh | |
| 19 | Apogee Therapeutics Inc COM | $89.6M | 1.06M | 0.9% | ▲+122% Added · +584K sh | |
| 20 | Entegris Inc COM | $88.5M | 754.7K | 0.9% | ▼−28% Reduced · −293K sh | |
| 21 | Monolithic PWR Sys Inc COM | $87.1M | 79.7K | 0.9% | ▼−5.3% Reduced · −4K sh | |
| 22 | Kirby Corp COM | $85.6M | 644.3K | 0.9% | ▲+385% Added · +511K sh | |
| 23 | Agree Rlty Corp COM | $83.0M | 1.10M | 0.9% | ▲+37% Added · +295K sh | |
| 24 | Sanmina Corp COM | $82.6M | 637.4K | 0.8% | ▼−0.2% Reduced · −1K sh | |
| 25 | Insmed Inc COM PAR $.01 | $76.8M | 469.6K | 0.8% | ▲+65% Added · +185K sh | |
| 26 | Astera Labs Inc COM | $75.4M | 688.2K | 0.8% | ▼−6.4% Reduced · −47K sh | |
| 27 | Liberty Energy Inc COM CL A | $71.8M | 2.49M | 0.7% | ▲14× Added · +2.3M sh | |
| 28 | Bridgebio Pharma Inc COM | $71.1M | 958.0K | 0.7% | ▲+16% Added · +132K sh | |
| 29 | Builders Firstsource Inc COM | $70.8M | 860.5K | 0.7% | ▲+49% Added · +284K sh | |
| 30 | Burlington Stores Inc COM | $70.5M | 216.5K | 0.7% | ▲+10% Added · +20K sh | |
| 31 | Perdoceo Ed Corp COM | $68.7M | 1.85M | 0.7% | ▼−3.4% Reduced · −65K sh | |
| 32 | Weatherford Intl PLC ORD SHS | $68.6M | 725.5K | 0.7% | ▲+1.5% Added · +11K sh | |
| 33 | Royal Caribbean Group COM | $65.6M | 238.3K | 0.7% | ▲+10% Added · +22K sh | |
| 34 | Intuitive Machines Inc CLASS A COM | $65.2M | 3.51M | 0.7% | ▲+32% Added · +845K sh | |
| 35 | Wintrust Finl Corp COM | $64.2M | 462.0K | 0.7% | ▼−15% Reduced · −81K sh | |
| 36 | Saia Inc COM | $64.1M | 182.5K | 0.7% | ▼−1.2% Reduced · −2K sh | |
| 37 | Sila Realty Trust Inc COMMON STOCK | $63.9M | 2.70M | 0.7% | ▲+18% Added · +412K sh | |
| 38 | Kymera Therapeutics Inc COM | $63.3M | 759.8K | 0.7% | ▲+19% Added · +124K sh | |
| 39 | First Bancorp Corporation COM NEW | $62.5M | 2.92M | 0.6% | ▼−4.1% Reduced · −125K sh | |
| 40 | Indie Semiconductor Inc CLASS A COM | $62.0M | 19.25M | 0.6% | ▲+2.1% Added · +403K sh | |
| 41 | Renasant Corp COM | $61.5M | 1.70M | 0.6% | ▼−15% Reduced · −306K sh | |
| 42 | Natera Inc COM | $58.9M | 294.3K | 0.6% | ▼−44% Reduced · −227K sh | |
| 43 | Antero Resources Corp COM | $57.3M | 1.35M | 0.6% | ▲New New position | |
| 44 | Elanco Animal Health Inc COM | $56.5M | 2.36M | 0.6% | ▼−8.3% Reduced · −214K sh | |
| 45 | Lattice Semiconductor Corp COM | $56.1M | 605.3K | 0.6% | ▼−38% Reduced · −373K sh | |
| 46 | Everpure Inc CL A | $55.8M | 944.5K | 0.6% | ▲+7.2% Added · +64K sh | |
| 47 | Eastern Bankshares Inc COM | $55.6M | 2.84M | 0.6% | ▼−4.1% Reduced · −121K sh | |
| 48 | Selective Ins Group Inc COM | $55.0M | 729.7K | 0.6% | ▲+19% Added · +115K sh | |
| 49 | First Indl Rlty TR Inc COM | $54.7M | 946.4K | 0.6% | ▼−5.2% Reduced · −52K sh | |
| 50 | Teradyne Inc COM | $54.3M | 183.2K | 0.6% | ▼−68% Reduced · −388K sh |
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q1 2026 | Mar 31, 2026 | May 15, 2026 | 291 | $9.7B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 17, 2026 | 295 | $9.4B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 14, 2025 | 297 | $11.2B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 14, 2025 | 294 | $10.8B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 15, 2025 | 283 | $9.1B | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 14, 2025 | 285 | $10.5B | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 14, 2024 | 281 | $10.6B | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 14, 2024 | 279 | $10.1B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 15, 2024 | 269 | $10.7B | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Feb 14, 2024 | 263 | $9.9B | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Nov 14, 2023 | 267 | $9.1B | 13F-HR |
| Q2 2023 | Jun 30, 2023 | Aug 14, 2023 | 261 | $10.4B | 13F-HR |
| Q1 2023 | Mar 31, 2023 | May 15, 2023 | 257 | $9.7B | 13F-HR |
| Q4 2022 | Dec 31, 2022 | Feb 14, 2023 | 262 | $9.2B | 13F-HR |
| Q3 2022 | Sep 30, 2022 | Nov 14, 2022 | 268 | $8.5B | 13F-HR |
| Q2 2022 | Jun 30, 2022 | Jul 20, 2022 | 274 | $8.7B | 13F-HR |
| Q1 2022 | Mar 31, 2022 | Apr 14, 2022 | 267 | $11.0B | 13F-HR |
| Q4 2021 | Dec 31, 2021 | Jan 19, 2022 | 274 | $12.7B | 13F-HR |
| Q3 2021 | Sep 30, 2021 | Oct 19, 2021 | 280 | $12.7B | 13F-HR |
| Q2 2021 | Jun 30, 2021 | Aug 9, 2021 | 284 | $13.7B | 13F-HR |
| Q1 2021 | Mar 31, 2021 | May 13, 2021 | 276 | $13.2B | 13F-HR |
| Q4 2020 | Dec 31, 2020 | Jan 19, 2021 | 284 | $13.5B | 13F-HR |
| Q3 2020 | Sep 30, 2020 | Nov 16, 2020 | 291 | $11.5B | 13F-HR |
| Q2 2020 | Jun 30, 2020 | Jul 17, 2020 | 291 | $11.3B | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.