Frontier Capital Management Co LLC 13F holdings
Frontier Capital Management Co LLC reported 300 positions with a total reported value of $10.7B as of 2026-06-30, in its 13F for Q2 2026, filed 2026-08-14. Top holdings by reported value: FTAI FTAI AVIATION LTD (3.0%), GVA GRANITE CONSTR INC (1.6%), ALK ALASKA AIR GROUP INC (1.6%), AAOI APPLIED OPTOELECTRONICS INC (1.3%), AKAM AKAMAI TECHNOLOGIES INC (1.3%). Against 2026-03-31 it opened 33 new positions and exited 24. Next 13F due by 2026-11-14, the legal deadline 45 days after the quarter ending 2026-09-30.
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Top holdings
25 largest of 300 positions · reported value as of 2026-06-30
| Holding | Shares | Reported value | % of portfolio |
|---|---|---|---|
| FTAI FTAI AVIATION LTD | 1,183,492 | $320.2M | 3.0% |
| GVA GRANITE CONSTR INC | 1,118,881 | $176.9M | 1.6% |
| ALK ALASKA AIR GROUP INC | 3,384,643 | $176.7M | 1.6% |
| AAOI APPLIED OPTOELECTRONICS INC | 975,318 | $144.5M | 1.3% |
| AKAM AKAMAI TECHNOLOGIES INC | 1,136,573 | $134.4M | 1.3% |
| ASH ASHLAND INC | 1,999,908 | $131.8M | 1.2% |
| LSCC LATTICE SEMICONDUCTOR CORP | 821,848 | $125.7M | 1.2% |
| BPOP POPULAR INC | 725,227 | $119.1M | 1.1% |
| MDB MONGODB INC | 334,098 | $112.2M | 1.0% |
| UTHR UNITED THERAPEUTICS CORP DEL | 206,808 | $112.1M | 1.0% |
| KNX KNIGHT-SWIFT TRANSN HLDGS IN | 1,410,955 | $109.9M | 1.0% |
| EAGLE MATLS INC | 458,621 | $103.2M | 1.0% |
| LRN STRIDE INC | 1,191,710 | $102.8M | 1.0% |
| XPO XPO INC | 499,601 | $102.6M | 1.0% |
| BBIO BRIDGEBIO PHARMA INC | 1,373,057 | $102.3M | 1.0% |
| LBRT LIBERTY ENERGY INC | 3,720,666 | $97.4M | 0.9% |
| SANM SANMINA CORP | 378,111 | $95.7M | 0.9% |
| UCTT ULTRA CLEAN HLDGS INC | 667,532 | $95.2M | 0.9% |
| RARE ULTRAGENYX PHARMACEUTICAL IN | 2,847,936 | $95.1M | 0.9% |
| PODD INSULET CORP | 622,506 | $94.8M | 0.9% |
| MODINE MFG CO | 343,868 | $91.8M | 0.9% |
| FLS FLOWSERVE CORP | 1,233,291 | $91.5M | 0.9% |
| KEX KIRBY CORP | 666,554 | $90.6M | 0.8% |
| ALGT ALLEGIANT TRAVEL CO | 765,347 | $90.0M | 0.8% |
| P EVERPURE INC | 1,120,040 | $88.2M | 0.8% |
SEC FORM 13F · Q2 2026 · VALUES AS REPORTED, NOT PRICES
New positions this quarter
Held at 2026-06-30, not at 2026-03-31 · 33 in all · reported value as of 2026-06-30
| Holding | Shares | Reported value | % of portfolio |
|---|---|---|---|
| DT DYNATRACE INC | 1,635,587 | $71.8M | 0.7% |
| PRIMORIS SVCS CORP | 468,762 | $46.5M | 0.4% |
| SARO STANDARDAERO INC | 1,449,333 | $43.3M | 0.4% |
| ALKS ALKERMES PLC | 659,562 | $34.6M | 0.3% |
| ETOR ETORO GROUP LTD | 832,037 | $32.8M | 0.3% |
| ST SENSATA TECHNOLOGIES HLDG PL | 657,792 | $31.4M | 0.3% |
| MANE VERADERMICS INC | 254,876 | $31.3M | 0.3% |
| UAMY UNITED STATES ANTIMONY CORP | 4,297,224 | $31.2M | 0.3% |
| MOH MOLINA HEALTHCARE INC | 128,459 | $29.4M | 0.3% |
| HALO HALOZYME THERAPEUTICS INC | 342,570 | $26.8M | 0.2% |
| STANDEX INTL CORP | 73,861 | $26.4M | 0.2% |
| UNUSUAL MACHS INC | 1,168,543 | $26.1M | 0.2% |
| CLYM CLIMB BIO INC | 1,939,019 | $25.3M | 0.2% |
| PRCH PORCH GROUP INC | 1,547,453 | $23.3M | 0.2% |
| NBIS NEBIUS GROUP N.V. | 78,322 | $21.6M | 0.2% |
| VRSK VERISK ANALYTICS INC | 118,091 | $21.2M | 0.2% |
| VIK VIKING HOLDINGS LTD | 196,715 | $20.6M | 0.2% |
| TGTX TG THERAPEUTICS INC | 368,813 | $20.3M | 0.2% |
| LITE LUMENTUM HLDGS INC | 21,893 | $18.8M | 0.2% |
| WTS WATTS WATER TECHNOLOGIES INC | 47,013 | $18.4M | 0.2% |
| ROBINHOOD MKTS INC | 182,543 | $18.3M | 0.2% |
| YSS YORK SPACE SYSTEMS INC | 733,025 | $18.0M | 0.2% |
| SYRE SPYRE THERAPEUTICS INC | 182,931 | $16.2M | 0.2% |
| FEDERAL RLTY INVT TR NEW | 90,572 | $11.2M | 0.1% |
| DCI DONALDSON INC | 94,808 | $8.5M | <0.1% |
Sold out
Held at 2026-03-31, gone by 2026-06-30 · 24 in all · reported value as of 2026-03-31
| Holding | Shares 2026-03-31 | Reported value | % of portfolio then |
|---|---|---|---|
| MRVL MARVELL TECHNOLOGY INC | 540,979 | $53.6M | 0.6% |
| NUVL NUVALENT INC | 395,546 | $40.5M | 0.4% |
| DIOD DIODES INC | 592,499 | $40.4M | 0.4% |
| QDEL QUIDELORTHO CORP | 1,752,613 | $28.8M | 0.3% |
| DPZ DOMINOS PIZZA INC | 62,733 | $22.5M | 0.2% |
| ECG EVERUS CONSTR GROUP | 143,499 | $16.9M | 0.2% |
| ANET ARISTA NETWORKS INC | 136,947 | $16.8M | 0.2% |
| TSCO TRACTOR SUPPLY CO | 362,574 | $16.4M | 0.2% |
| APH AMPHENOL CORP | 124,757 | $15.8M | 0.2% |
| RMD RESMED INC | 65,224 | $14.6M | 0.2% |
| CZR CAESARS ENTERTAINMENT INC NE | 503,396 | $13.3M | 0.1% |
| KLAC KLA CORP | 8,099 | $11.9M | 0.1% |
| LULU LULULEMON ATHLETICA INC | 77,472 | $11.9M | 0.1% |
| SUN CTRY AIRLS HLDGS INC | 584,311 | $9.7M | <0.1% |
| NDAQ NASDAQ INC | 106,895 | $9.1M | <0.1% |
| TTD THE TRADE DESK INC | 321,192 | $7.3M | <0.1% |
| GDYN GRID DYNAMICS HLDGS INC | 1,129,076 | $6.4M | <0.1% |
| ROST ROSS STORES INC | 26,507 | $5.7M | <0.1% |
| VIRIDIAN THERAPEUTICS INC | 158,371 | $3.1M | <0.1% |
| SHLS SHOALS TECHNOLOGIES GROUP IN | 97,840 | $643.8K | <0.1% |
| PSN PARSONS CORP DEL | 11,310 | $612.7K | <0.1% |
| COTERRA ENERGY INC | 12,509 | $439.6K | <0.1% |
| ALHC ALIGNMENT HEALTHCARE INC | 18,820 | $331.6K | <0.1% |
| LKQ LKQ CORP | 8,916 | $261.9K | <0.1% |
Biggest increases and decreases
Positions held at both quarter ends, by change in shares · reported value as of 2026-06-30
Increases
| Holding | Shares 2026-03-31 | Shares 2026-06-30 | Change | Reported value |
|---|---|---|---|---|
| AAOI APPLIED OPTOELECTRONICS INC | 284,146 | 975,318 | +243.2% | $144.5M |
| PODD INSULET CORP | 172,513 | 622,506 | +260.8% | $94.8M |
| FLS FLOWSERVE CORP | 462,448 | 1,233,291 | +166.7% | $91.5M |
| HUBB HUBBELL INC | 25,068 | 119,997 | +378.7% | $62.8M |
| MDB MONGODB INC | 214,316 | 334,098 | +55.9% | $112.2M |
| SNOW SNOWFLAKE INC | 71,309 | 226,439 | +217.5% | $57.6M |
| PGY PAGAYA TECHNOLOGIES LTD | 196,696 | 2,296,417 | +1,067.5% | $41.9M |
| MODINE MFG CO | 204,039 | 343,868 | +68.5% | $91.8M |
| IONQ IONQ INC | 10,630 | 666,404 | +6,169.1% | $35.5M |
| INSM INSMED INC | 469,561 | 795,242 | +69.4% | $84.8M |
| LSCC LATTICE SEMICONDUCTOR CORP | 605,318 | 821,848 | +35.8% | $125.7M |
| FTAI FTAI AVIATION LTD | 1,062,210 | 1,183,492 | +11.4% | $320.2M |
Decreases
| Holding | Shares 2026-03-31 | Shares 2026-06-30 | Change | Reported value |
|---|---|---|---|---|
| ALAB ASTERA LABS INC | 688,213 | 154,601 | -77.5% | $74.7M |
| UCTT ULTRA CLEAN HLDGS INC | 1,787,451 | 667,532 | -62.7% | $95.2M |
| APGE APOGEE THERAPEUTICS INC | 1,064,483 | 303,739 | -71.5% | $40.3M |
| DAR DARLING INGREDIENTS INC | 2,455,668 | 793,866 | -67.7% | $43.4M |
| SIMO SILICON MOTION TECHNOLOGY CO | 272,356 | 2,678 | -99.0% | $892.8K |
| COHU COHU INC | 1,294,616 | 200,834 | -84.5% | $14.8M |
| ENTG ENTEGRIS INC | 754,706 | 351,950 | -53.4% | $63.3M |
| SILA REALTY TRUST INC | 2,696,692 | 377,378 | -86.0% | $11.5M |
| SANM SANMINA CORP | 637,388 | 378,111 | -40.7% | $95.7M |
| MONOLITHIC PWR SYS INC | 79,699 | 32,723 | -58.9% | $45.2M |
| JAZZ JAZZ PHARMACEUTICALS PLC | 517,284 | 277,279 | -46.4% | $66.8M |
| ATI ATI INC | 694,422 | 419,968 | -39.5% | $82.8M |
CIK 351173 · 13F FILINGS ON EDGAR · INFORMATIONAL ONLY
More 13F data
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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