Holders — by stockHoldings — by fund
FRONTIER CAPITAL MANAGEMENT CO LLC
Everything this manager disclosed owning in US-listed stocks — its complete Form 13F portfolio · as of 2026-06-30 · filed with the SEC up to 45 days after quarter end · CIK 0000351173
$10.73B
disclosed book value
300
positions
3%
largest position share
Positions, as of 2026-06-30
top 100 of 300 · 13F covers long US-listed positions only — cash, bonds, private and foreign stakes are not disclosed · PUT/CALL tags = options positions (share-equivalents), not shares held
| # | Issuer | Shares | Value | % of book |
|---|---|---|---|---|
| 1 | FTAI AVIATION LTD | 1.2M | $320.2M | 3% |
| 2 | GVAGRANITE CONSTR INC | 1.1M | $176.9M | 1.6% |
| 3 | ALKALASKA AIR GROUP INC | 3.4M | $176.7M | 1.6% |
| 4 | AAOIAPPLIED OPTOELECTRONICS INC | 975,318 | $144.5M | 1.3% |
| 5 | AKAMAKAMAI TECHNOLOGIES INC | 1.1M | $134.4M | 1.3% |
| 6 | ASHASHLAND INC | 2.0M | $131.8M | 1.2% |
| 7 | LSCCLATTICE SEMICONDUCTOR CORP | 821,848 | $125.7M | 1.2% |
| 8 | BPOPPOPULAR INC | 725,227 | $119.1M | 1.1% |
| 9 | MDBMONGODB INC | 334,098 | $112.2M | 1% |
| 10 | UTHRUNITED THERAPEUTICS CORP DEL | 206,808 | $112.1M | 1% |
| 11 | KNXKNIGHT-SWIFT TRANSN HLDGS IN | 1.4M | $109.9M | 1% |
| 12 | EXPEAGLE MATLS INC | 458,621 | $103.2M | 1% |
| 13 | LRNSTRIDE INC | 1.2M | $102.8M | 1% |
| 14 | XPOXPO INC | 499,601 | $102.6M | 1% |
| 15 | BBIOBRIDGEBIO PHARMA INC | 1.4M | $102.3M | 1% |
| 16 | LBRTLIBERTY ENERGY INC | 3.7M | $97.4M | 0.9% |
| 17 | SANMSANMINA CORP | 378,111 | $95.7M | 0.9% |
| 18 | UCTTULTRA CLEAN HLDGS INC | 667,532 | $95.2M | 0.9% |
| 19 | RAREULTRAGENYX PHARMACEUTICAL IN | 2.8M | $95.1M | 0.9% |
| 20 | PODDINSULET CORP | 622,506 | $94.8M | 0.9% |
| 21 | MODMODINE MFG CO | 343,868 | $91.8M | 0.9% |
| 22 | FLSFLOWSERVE CORP | 1.2M | $91.5M | 0.9% |
| 23 | KEXKIRBY CORP | 666,554 | $90.6M | 0.8% |
| 24 | ALGTALLEGIANT TRAVEL CO | 765,347 | $90.0M | 0.8% |
| 25 | PEVERPURE INC | 1.1M | $88.2M | 0.8% |
| 26 | AMTMAMENTUM HOLDINGS INC | 4.1M | $85.7M | 0.8% |
| 27 | KYMRKYMERA THERAPEUTICS INC | 740,866 | $85.0M | 0.8% |
| 28 | INSMINSMED INC | 795,242 | $84.8M | 0.8% |
| 29 | ATIATI INC | 419,968 | $82.8M | 0.8% |
| 30 | RNSTRENASANT CORP | 1.8M | $75.7M | 0.7% |
| 31 | ALABASTERA LABS INC | 154,601 | $74.7M | 0.7% |
| 32 | ROYAL CARIBBEAN GROUP | 233,963 | $74.3M | 0.7% |
| 33 | PVLAPALVELLA THERAPEUTICS INC NE | 478,833 | $73.2M | 0.7% |
| 34 | DTDYNATRACE INC | 1.6M | $71.8M | 0.7% |
| 35 | INDIINDIE SEMICONDUCTOR INC | 15.9M | $71.5M | 0.7% |
| 36 | ADCAGREE RLTY CORP | 943,005 | $71.4M | 0.7% |
| 37 | LUNRINTUITIVE MACHINES INC | 3.2M | $67.9M | 0.6% |
| 38 | JAZZ PHARMACEUTICALS PLC | 277,279 | $66.8M | 0.6% |
| 39 | SAIASAIA INC | 151,477 | $63.8M | 0.6% |
| 40 | ENTGENTEGRIS INC | 351,950 | $63.3M | 0.6% |
| 41 | FBPFIRST BANCORP CORPORATION | 2.4M | $63.1M | 0.6% |
| 42 | CRCLCIRCLE INTERNET GROUP INC | 1.0M | $62.9M | 0.6% |
| 43 | HUBBHUBBELL INC | 119,997 | $62.8M | 0.6% |
| 44 | AXSMAXSOME THERAPEUTICS INC. | 254,280 | $62.2M | 0.6% |
| 45 | FLEX LTD | 382,135 | $61.9M | 0.6% |
| 46 | WTFCWINTRUST FINL CORP | 384,593 | $61.8M | 0.6% |
| 47 | TDWTIDEWATER INC NEW | 894,796 | $59.6M | 0.6% |
| 48 | ATMUATMUS FILTRATION TECHNOLOGIE | 1.2M | $59.0M | 0.6% |
| 49 | JBLJABIL INC | 152,187 | $58.7M | 0.5% |
| 50 | BLDRBUILDERS FIRSTSOURCE INC | 651,389 | $58.3M | 0.5% |
| 51 | SNOWSNOWFLAKE INC | 226,439 | $57.6M | 0.5% |
| 52 | TRVITREVI THERAPEUTICS INC | 3.1M | $57.3M | 0.5% |
| 53 | GENIUS SPORTS LIMITED | 9.4M | $57.2M | 0.5% |
| 54 | BWINTHE BALDWIN INSURANCE GRP IN | 2.1M | $55.8M | 0.5% |
| 55 | VERAVERA THERAPEUTICS INC | 1.3M | $55.6M | 0.5% |
| 56 | UROGEN PHARMA LTD | 1.5M | $55.5M | 0.5% |
| 57 | MKSIMKS INC. | 120,625 | $53.7M | 0.5% |
| 58 | GTXGARRETT MOTION INC | 1.5M | $53.1M | 0.5% |
| 59 | ELANELANCO ANIMAL HEALTH INC | 2.1M | $52.6M | 0.5% |
| 60 | EBCEASTERN BANKSHARES INC | 2.3M | $51.9M | 0.5% |
| 61 | FAFFIRST AMERN FINL CORP | 749,097 | $51.4M | 0.5% |
| 62 | APGAPI GROUP CORP | 1.2M | $51.0M | 0.5% |
| 63 | STAGSTAG INDUSTRIAL INC | 1.3M | $50.7M | 0.5% |
| 64 | WEATHERFORD INTL PLC | 617,390 | $50.3M | 0.5% |
| 65 | AIRAAR CORP | 350,441 | $50.1M | 0.5% |
| 66 | CRSCARPENTER TECHNOLOGY CORP | 80,488 | $49.6M | 0.5% |
| 67 | PRDOPERDOCEO ED CORP | 1.5M | $49.5M | 0.5% |
| 68 | ACHCACADIA HEALTHCARE COMPANY IN | 1.7M | $49.4M | 0.5% |
| 69 | CGNXCOGNEX CORP | 669,588 | $48.5M | 0.5% |
| 70 | FRFIRST INDL RLTY TR INC | 788,792 | $48.4M | 0.5% |
| 71 | DDOGDATADOG INC | 182,164 | $47.4M | 0.4% |
| 72 | NTRANATERA INC | 173,547 | $47.1M | 0.4% |
| 73 | PRIMPRIMORIS SVCS CORP | 468,762 | $46.5M | 0.4% |
| 74 | ARANTERO RESOURCES CORP | 1.3M | $46.3M | 0.4% |
| 75 | FICOFAIR ISAAC CORP | 38,278 | $45.7M | 0.4% |
| 76 | MPWRMONOLITHIC PWR SYS INC | 32,723 | $45.2M | 0.4% |
| 77 | TFINTRIUMPH FINANCIAL INC | 584,333 | $44.6M | 0.4% |
| 78 | DARDARLING INGREDIENTS INC | 793,866 | $43.4M | 0.4% |
| 79 | SAROSTANDARDAERO INC | 1.4M | $43.3M | 0.4% |
| 80 | VOYGVOYAGER TECHNOLOGIES INC | 1.3M | $43.3M | 0.4% |
| 81 | SNXTD SYNNEX CORPORATION | 161,933 | $43.3M | 0.4% |
| 82 | CHECHEMED CORP NEW | 90,567 | $42.2M | 0.4% |
| 83 | MDUMDU RES GROUP INC | 2.0M | $42.2M | 0.4% |
| 84 | RRXREGAL REXNORD CORPORATION | 176,675 | $42.1M | 0.4% |
| 85 | PAGAYA TECHNOLOGIES LTD | 2.3M | $41.9M | 0.4% |
| 86 | ACVAACV AUCTIONS INC | 5.8M | $41.8M | 0.4% |
| 87 | KBRKBR INC | 1.2M | $41.6M | 0.4% |
| 88 | RYZRYERSON HLDG CORP | 1.7M | $41.4M | 0.4% |
| 89 | EROERO COPPER CORP | 1.5M | $41.2M | 0.4% |
| 90 | NSITINSIGHT ENTERPRISES INC | 337,686 | $41.1M | 0.4% |
| 91 | WSFSWSFS FINL CORP | 535,179 | $41.1M | 0.4% |
| 92 | TERTERADYNE INC | 84,563 | $40.9M | 0.4% |
| 93 | GPORGULFPORT ENERGY CORP | 240,790 | $40.9M | 0.4% |
| 94 | SBCFSEACOAST BKG CORP FLA | 1.2M | $40.8M | 0.4% |
| 95 | CREDO TECHNOLOGY GROUP HOLDI | 149,509 | $40.7M | 0.4% |
| 96 | NETCLOUDFLARE INC | 165,415 | $40.6M | 0.4% |
| 97 | APGEAPOGEE THERAPEUTICS INC | 303,739 | $40.3M | 0.4% |
| 98 | LMNDLEMONADE INC | 609,820 | $39.7M | 0.4% |
| 99 | IRTINDEPENDENCE RLTY TR INC | 2.4M | $39.7M | 0.4% |
| 100 | PWRQUANTA SVCS INC | 54,069 | $38.9M | 0.4% |
Source: SEC Form 13F-HR, reporting period 2026-06-30. Values are the manager's filed June-30-style quarter-end marks, not live prices. Research, not investment advice.