FRONTIER CAPITAL MANAGEMENT CO LLC
Long book
$9.73B
Q1 2026
Positions
291
Top-10 weight
15%
concentration
Last quarter
+18.7%
SPY +14.8%
Turnover
19%
of book per quarter
Strategy in plain words
auto-generated from filingsFRONTIER CAPITAL MANAGEMENT CO LLC is an institutional manager, running a $9.73B US long book across 291 positions.
The portfolio is broadly diversified across 291 positions (top 10 only 15%). Turnover is modest: positions are typically held for years. Current anchor positions: FTAI AVIATION LTD, DARLING INGREDIENTS INC, UNITED THERAPEUTICS CORP, CIRCLE INTERNET GROUP INC, GRANITE CONSTRUCTION INC.
Over the last 9 quarters its long book ran on average 0.3pp per quarter ahead of the S&P 500, beating the index in 5 of 9 quarters. Signal value of individual moves is limited — treat changes as weak evidence.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
-1.5%
Q2 2024
+8.6%
Q3 2024
+0.8%
Q4 2024
-11.3%
Q1 2025
+13.4%
Q2 2025
+7.3%
Q3 2025
+3.3%
Q4 2025
+3.5%
Q1 2026
+18.7%
Sector allocation
Industrials 22%
Technology 16%
Healthcare 15%
Financials 13%
Services media 11%
Consumer discretionary 8%
Other 4%
Energy 3%
Long book by quarter
What does FRONTIER CAPITAL own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| FTAI FTAI AVIATION LTD | Services media | 1.1M | $260.2M | 2.7% | -18.1% |
| DAR DARLING INGREDIENTS INC | Consumer staples | 2.5M | $151.9M | 1.6% | -9.7% |
| UTHR UNITED THERAPEUTICS CORP | Healthcare | 252.7K | $149.8M | 1.5% | +39.5% |
| CRCL CIRCLE INTERNET GROUP INC | Financials | 1.5M | $147.7M | 1.5% | +37.0% |
| GVA GRANITE CONSTRUCTION INC | Industrials | 1.2M | $142.4M | 1.5% | -5.6% |
| LRN STRIDE INC | Services media | 1.5M | $136.6M | 1.4% | +864.1% |
| AMTM AMENTUM HOLDINGS INC | Services media | 4.9M | $128.6M | 1.3% | -14.6% |
| XPO XPO INC | Industrials | 652.1K | $126.9M | 1.3% | -9.5% |
| ALK ALASKA AIR GROUP INC | Industrials | 3.4M | $124.1M | 1.3% | +47.9% |
| KNX KNIGHT-SWIFT TRANSPORTATION | Industrials | 2.1M | $120.1M | 1.2% | +6.8% |
| AKAM AKAMAI TECHNOLOGIES INC | Services media | 1.0M | $119.0M | 1.2% | +126.8% |
| EXP EAGLE MATERIALS INC | Industrials | 610.7K | $115.7M | 1.2% | +12.0% |
| UCTT ULTRA CLEAN HOLDINGS INC | Technology | 1.8M | $111.1M | 1.1% | -49.1% |
| BPOP POPULAR INC | Financials | 800.9K | $107.5M | 1.1% | -16.1% |
| ASH ASHLAND INC | Consumer discretionary | 1.9M | $106.4M | 1.1% | +34.2% |
| ATI ATI INC | Industrials | 694.4K | $101.0M | 1.0% | -43.4% |
| JAZZ JAZZ PHARMACEUTICALS PLC | Healthcare | 517.3K | $97.8M | 1.0% | +183.9% |
| TDW TIDEWATER INC | Industrials | 1.1M | $89.6M | 0.9% | +13.1% |
| APGE APOGEE THERAPEUTICS INC | Healthcare | 1.1M | $89.6M | 0.9% | +121.6% |
| ENTG ENTEGRIS INC | Other | 754.7K | $88.5M | 0.9% | -28.0% |
| MPWR MONOLITHIC POWER SYSTEMS INC | Technology | 79.7K | $87.1M | 0.9% | -5.3% |
| KEX KIRBY CORP | Industrials | 644.3K | $85.6M | 0.9% | +384.7% |
| SANM SANMINA CORP | Technology | 637.4K | $82.6M | 0.8% | -0.2% |
| INSM INSMED INC | Healthcare | 469.6K | $76.8M | 0.8% | +64.8% |
| ALAB ASTERA LABS INC | Technology | 688.2K | $75.4M | 0.8% | -6.4% |
| LBRT LIBERTY ENERGY INC | Energy | 2.5M | $71.8M | 0.7% | +1277.0% |
| BBIO BRIDGEBIO PHARMA INC | Healthcare | 958.0K | $71.1M | 0.7% | +16.0% |
| BLDR BUILDERS FIRSTSOURCE INC | Consumer discretionary | 860.5K | $70.8M | 0.7% | +49.3% |
| BURL BURLINGTON STORES INC | Consumer discretionary | 216.5K | $70.5M | 0.7% | +10.1% |
| PRDO PERDOCEO EDUCATION CORP | Services media | 1.8M | $68.7M | 0.7% | -3.4% |
| 0WE WEATHERFORD INTERNATIONAL PL | — | 725.5K | $68.6M | 0.7% | +1.5% |
| RCL ROYAL CARIBBEAN CRUISES LTD | Industrials | 238.3K | $65.6M | 0.7% | +10.4% |
| LUNR INTUITIVE MACHINES INC | Technology | 3.5M | $65.2M | 0.7% | +31.6% |
| WTFC WINTRUST FINANCIAL CORP | Financials | 462.0K | $64.2M | 0.7% | -14.9% |
| SAIA SAIA INC | Industrials | 182.5K | $64.1M | 0.7% | -1.2% |
| KYMR KYMERA THERAPEUTICS INC | Healthcare | 759.8K | $63.3M | 0.7% | +19.5% |
| FBP FIRST BANCORP PUERTO RICO | Financials | 2.9M | $62.5M | 0.6% | -4.1% |
| INDI INDIE SEMICONDUCTOR INC-A | Technology | 19.2M | $62.0M | 0.6% | +2.1% |
| RNST RENASANT CORP | Financials | 1.7M | $61.5M | 0.6% | -15.2% |
| NTRA NATERA INC | Healthcare | 294.3K | $58.9M | 0.6% | -43.6% |
| AR ANTERO RESOURCES CORP | Energy | 1.3M | $57.3M | 0.6% | New |
| ELAN ELANCO ANIMAL HEALTH INC | Healthcare | 2.4M | $56.5M | 0.6% | -8.3% |
| LSCC LATTICE SEMICONDUCTOR CORP | Technology | 605.3K | $56.1M | 0.6% | -38.1% |
| P EVERPURE INC-A | Technology | 944.5K | $55.8M | 0.6% | +7.2% |
| EBC EASTERN BANKSHARES INC | Financials | 2.8M | $55.6M | 0.6% | -4.1% |
| SIGI SELECTIVE INSURANCE GROUP | Financials | 729.7K | $55.0M | 0.6% | +18.6% |
| TER TERADYNE INC | Technology | 183.2K | $54.3M | 0.6% | -67.9% |
| MRVL MARVELL TECHNOLOGY INC | Technology | 541.0K | $53.6M | 0.6% | +2.3% |
| FAF FIRST AMERICAN FINANCIAL | Financials | 880.8K | $53.1M | 0.5% | +4.4% |
| KBR KBR INC | Industrials | 1.4M | $52.9M | 0.5% | +3.8% |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 291 | $9.73B | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 17, 2026 | 295 | $9.42B | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 14, 2025 | 297 | $11.15B | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 294 | $10.80B | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 15, 2025 | 283 | $9.15B | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 14, 2025 | 285 | $10.52B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 281 | $10.62B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 279 | $10.10B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 15, 2024 | 269 | $10.70B | canonical | SEC ↗ |
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