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Super Investors / FRONTIER CAPITAL MANAGEMENT CO LLC
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FRONTIER CAPITAL MANAGEMENT CO LLC

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$10.7B
Positions
300
Quarter ended
June 30, 2026
Filed
August 14, 2026

Reported portfolio value by quarter (53 quarters reported)

$15.5B $8.53B
Q2 13 Q1 16 Q4 18 Q3 21 Q2 24 Q2 26

$12B in Q2 2013 → $10.7B now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
Ftai Aviation Ltd 3.0% Added 11% 1,183,492 $320M
GC Granite Constr Inc 1.6% Trimmed 5.8% 1,118,881 $177M
Alaska Air Group Inc 1.6% Added 0.3% 3,384,643 $177M
Applied Optoelectronics Inc 1.3% Added 243% 975,318 $145M
Akamai Technologies Inc 1.3% Added 9.6% 1,136,573 $134M
Ashland Inc 1.2% Added 4.6% 1,999,908 $132M
Lattice Semiconductor Corp 1.2% Added 36% 821,848 $126M
Popular Inc 1.1% Trimmed 9.5% 725,227 $119M
Mongodb Inc 1.0% Added 56% 334,098 $112M
UT United Therapeutics Corp Del 1.0% Trimmed 18% 206,808 $112M
KT Knight-swift Transn Hldgs In 1.0% Trimmed 32% 1,410,955 $110M
EM Eagle Matls Inc 1.0% Trimmed 25% 458,621 $103M
Stride Inc 1.0% Trimmed 23% 1,191,710 $103M
Xpo Inc 1.0% Trimmed 23% 499,601 $103M
Bridgebio Pharma Inc 1.0% Added 43% 1,373,057 $102M
Liberty Energy Inc 0.9% Added 49% 3,720,666 $97.4M
Sanmina Corp 0.9% Trimmed 41% 378,111 $95.7M
UC Ultra Clean Hldgs Inc 0.9% Trimmed 63% 667,532 $95.2M
UP Ultragenyx Pharmaceutical In 0.9% Added 30% 2,847,936 $95.1M
Insulet Corp 0.9% Added 261% 622,506 $94.8M
MM Modine Mfg Co 0.9% Added 69% 343,868 $91.8M
Flowserve Corp 0.9% Added 167% 1,233,291 $91.5M
Kirby Corp 0.8% Added 3.4% 666,554 $90.6M
Allegiant Travel Co 0.8% Added 27% 765,347 $90M
Everpure Inc 0.8% Added 19% 1,120,040 $88.2M
Amentum Holdings Inc 0.8% Trimmed 16% 4,143,971 $85.7M
Kymera Therapeutics Inc 0.8% Trimmed 2.5% 740,866 $85M
Insmed Inc 0.8% Added 69% 795,242 $84.8M
Ati Inc 0.8% Trimmed 40% 419,968 $82.8M
Renasant Corp 0.7% Added 4.5% 1,778,953 $75.7M
Astera Labs Inc 0.7% Trimmed 78% 154,601 $74.7M
RC Royal Caribbean Group 0.7% Trimmed 1.8% 233,963 $74.3M
PT Palvella Therapeutics Inc Ne 0.7% Added 28% 478,833 $73.2M
Dynatrace Inc 0.7% New 1,635,587 $71.8M
Indie Semiconductor Inc 0.7% Trimmed 17% 15,914,169 $71.5M
AR Agree Rlty Corp 0.7% Trimmed 14% 943,005 $71.4M
Intuitive Machines Inc 0.6% Trimmed 9.7% 3,173,434 $67.9M
Jazz Pharmaceuticals PLC 0.6% Trimmed 46% 277,279 $66.8M
Saia Inc 0.6% Trimmed 17% 151,477 $63.8M
Entegris Inc 0.6% Trimmed 53% 351,950 $63.3M
FB First Bancorp Corporation 0.6% Trimmed 17% 2,422,265 $63.1M
Circle Internet Group Inc 0.6% Trimmed 35% 1,004,783 $62.9M
Hubbell Inc 0.6% Added 379% 119,997 $62.8M
Axsome Therapeutics Inc. 0.6% Added 25% 254,280 $62.2M
Flex Ltd 0.6% Added 5.7% 382,135 $61.9M
WF Wintrust Finl Corp 0.6% Trimmed 17% 384,593 $61.8M
TN Tidewater Inc New 0.6% Trimmed 17% 894,796 $59.6M
AF Atmus Filtration Technologie 0.6% Added 56% 1,157,930 $59M
Jabil Inc 0.5% Trimmed 7.7% 152,187 $58.7M
Builders Firstsource Inc 0.5% Trimmed 24% 651,389 $58.3M
Snowflake Inc 0.5% Added 218% 226,439 $57.6M
Trevi Therapeutics Inc 0.5% Added 54% 3,070,740 $57.3M
Genius Sports Limited 0.5% Added 90% 9,432,864 $57.2M
BI The Baldwin Insurance Grp In 0.5% Added 90% 2,097,658 $55.8M
Vera Therapeutics Inc 0.5% Added 135% 1,295,405 $55.6M
Urogen Pharma Ltd 0.5% Added 15% 1,508,547 $55.5M
Mks Inc. 0.5% Trimmed 25% 120,625 $53.7M
Garrett Motion Inc 0.5% Trimmed 45% 1,466,821 $53.1M
Elanco Animal Health Inc 0.5% Trimmed 9.5% 2,138,550 $52.6M
Eastern Bankshares Inc 0.5% Trimmed 18% 2,332,022 $51.9M

Showing top 60 of 300 positions.

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 8 quarters.

Q2 2026

quarter ended June 30, 2026 · filed August 14, 2026

Company Action Shares changed Value of change % of portfolio
Astera Labs Inc Trimmed −533,612 −$258M 0.7%
UC Ultra Clean Hldgs Inc Trimmed −1,119,919 −$160M 0.9%
Applied Optoelectronics Inc Added +691,172 +$102M 1.3%
Apogee Therapeutics Inc Trimmed −760,744 −$101M 0.4%
Darling Ingredients Inc Trimmed −1,661,802 −$90.8M 0.4%
Silicon Motion Technology Co Trimmed −269,678 −$89.9M
Cohu Inc Trimmed −1,093,782 −$80.8M 0.1%
Entegris Inc Trimmed −402,756 −$72.4M 0.6%
Dynatrace Inc New +1,635,587 +$71.8M 0.7%
Sila Realty Trust Inc Trimmed −2,319,314 −$70.4M 0.1%

Showing the 10 largest of 324 changes.

Q1 2026

quarter ended March 31, 2026 · filed May 15, 2026

Company Action Shares changed Value of change % of portfolio
Stride Inc Added +1,388,589 +$122M 1.4%
Teradyne Inc Trimmed −388,036 −$115M 0.6%
UC Ultra Clean Hldgs Inc Trimmed −1,722,388 −$107M 1.1%
Mks Inc. Trimmed −389,485 −$89.5M 0.4%
Ati Inc Trimmed −533,031 −$77.5M 1.0%
Kirby Corp Added +511,397 +$68M 0.9%
Liberty Energy Inc Added +2,313,093 +$66.6M 0.7%
Akamai Technologies Inc Added +579,514 +$66.6M 1.2%
Coherent Corp Trimmed −278,033 −$66.2M 0.3%
Jazz Pharmaceuticals PLC Added +335,083 +$63.3M 1.0%

Showing the 10 largest of 317 changes.

Q4 2025

quarter ended December 31, 2025 · filed February 17, 2026

Company Action Shares changed Value of change % of portfolio
Coherent Corp Trimmed −980,001 −$181M 0.8%
Teradyne Inc Trimmed −855,408 −$166M 1.2%
Astera Labs Inc Added +733,735 +$122M 1.3%
Vertiv Holdings Co Trimmed −663,110 −$107M 0.1%
Ftai Aviation Ltd Trimmed −526,181 −$104M 2.7%
Carlyle Group Inc Trimmed −1,704,906 −$101M 0.3%
Circle Internet Group Inc New +1,130,104 +$89.6M 1.0%
Applovin Corp Trimmed −132,292 −$89.1M 0.1%
Mks Inc. Trimmed −530,028 −$84.7M 0.9%
EM Eagle Matls Inc Trimmed −398,334 −$82.3M 1.2%

Showing the 10 largest of 315 changes.

Q3 2025

quarter ended September 30, 2025 · filed November 14, 2025

Company Action Shares changed Value of change % of portfolio
Teradyne Inc Added +836,961 +$115M 1.8%
RC Royal Caribbean Group New +353,891 +$115M 1.0%
Builders Firstsource Inc Added +689,451 +$83.6M 1.4%
Entegris Inc Added +822,288 +$76M 1.2%
Coherent Corp Added +641,806 +$69.1M 1.3%
M Mattel Inc Trimmed −3,992,810 −$67.2M 0.8%
Mrc Global Inc Exited −4,453,159 −$61.1M
PF Pinnacle Finl Partners Inc Exited −528,987 −$58.4M
Ati Inc Trimmed −671,163 −$54.6M 1.1%
Twilio Inc Trimmed −540,338 −$54.1M 0.2%

Showing the 10 largest of 318 changes.

Q2 2025

quarter ended June 30, 2025 · filed August 14, 2025

Company Action Shares changed Value of change % of portfolio
BR Beacon Roofing Supply Inc Exited −1,405,443 −$174M
Palantir Technologies Inc Trimmed −668,156 −$91.1M 0.5%
Roblox Corp New +643,024 +$67.6M 0.6%
Vistra Corp New +329,531 +$63.9M 0.6%
CE Caesars Entertainment Inc Ne Trimmed −2,215,991 −$62.9M 0.4%
Mks Inc. Added +542,094 +$53.9M 0.8%
Cloudflare Inc Added +268,867 +$52.7M 0.5%
Cushman Wakefield PLC New +4,676,051 +$51.8M 0.5%
Silicon Motion Technology Co Added +686,261 +$51.6M 0.9%
Darling Ingredients Inc Added +1,320,817 +$50.1M 1.2%

Showing the 10 largest of 305 changes.

Q1 2025

quarter ended March 31, 2025 · filed May 15, 2025

Company Action Shares changed Value of change % of portfolio
BR Beacon Roofing Supply Inc Trimmed −979,350 −$121M 1.9%
Palantir Technologies Inc Trimmed −909,747 −$76.8M 0.9%
Dolby Laboratories Inc Added +897,996 +$72.1M 1.1%
Allegro Microsystems Inc Added +2,818,543 +$70.8M 0.8%
Amentum Holdings Inc New +3,578,732 +$65.1M 0.7%
Natera Inc Trimmed −441,990 −$62.5M 0.6%
Cheniere Energy Inc Added +238,966 +$55.3M 1.1%
Coinbase Global Inc Exited −218,271 −$54.2M
Borgwarner Inc Exited −1,702,333 −$54.1M
Arista Networks Inc Trimmed −483,653 −$37.5M 0.3%

Showing the 10 largest of 307 changes.

Q4 2024

quarter ended December 31, 2024 · filed February 14, 2025

Company Action Shares changed Value of change % of portfolio
SM Summit Matls Inc Trimmed −2,626,483 −$133M 0.1%
Applovin Corp New +363,178 +$118M 1.1%
Arista Networks Inc New +787,700 +$87.1M 0.8%
Arista Networks Inc Exited −209,198 −$80.3M
Halozyme Therapeutics Inc Exited −1,269,827 −$72.7M
CT Credo Technology Group Holdi Trimmed −1,016,973 −$68.4M 0.5%
Carlyle Group Inc Added +1,220,827 +$61.6M 1.2%
Coherent Corp Trimmed −615,723 −$58.3M 0.2%
Ftai Aviation Ltd Trimmed −375,311 −$54.1M 2.6%
Builders Firstsource Inc Trimmed −316,977 −$45.3M 0.6%

Showing the 10 largest of 304 changes.

Q3 2024

quarter ended September 30, 2024 · filed November 14, 2024

Company Action Shares changed Value of change % of portfolio
Ftai Aviation Ltd Trimmed −563,508 −$74.9M 2.8%
Pacira Biosciences Inc Exited −1,836,873 −$52.6M
AG Apollo Global Mgmt Inc Trimmed −406,723 −$50.8M 0.8%
UT United Therapeutics Corp Del Added +141,518 +$50.7M 0.6%
CH Crowdstrike Hldgs Inc Trimmed −173,239 −$48.6M 0.2%
MM Modine Mfg Co Added +357,198 +$47.4M 1.0%
Coherent Corp Trimmed −524,719 −$46.7M 0.7%
SC Site Ctrs Corp New +742,670 +$44.9M 0.4%
Humana Inc Exited −118,818 −$44.4M
SC Site Ctrs Corp Exited −2,994,095 −$43.4M

Showing the 10 largest of 304 changes.

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