Q2 2026 13F · SEC CIK 351173

Frontier Capital Management Co LLC

Institutional asset managerFiled 2026-08-14 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $10.7B
Reported positions: 300
Top holdings a year, 3 yrs: +35.2%
Assets under management: $9.6B

Frontier Capital Management Co LLC is an institutional asset manager that reported 300 positions worth $10.7B in its Q2 2026 13F, filed 2026-08-14. Its largest holdings were Ftai Aviation Ltd (FTAI, 3.0%), Granite Construction Inc Com (GVA, 1.6%), Alaska Air Group Inc (ALK, 1.6%). A portfolio copying its top holdings returned 35.2% a year over the last 3 years, against 20.4% for the S&P 500.

Frontier Capital Management Co LLC holdings largest 50 of 300 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

Frontier Capital Management Co LLC 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
FTAIFtai Aviation Ltd	3.0%	2.7%	1,183,492	+11.4%	$320.2M
GVAGranite Construction Inc Com	1.6%	1.5%	1,118,881	-5.8%	$176.9M
ALKAlaska Air Group Inc	1.6%	1.3%	3,384,643	+0.3%	$176.7M
AAOIApplied Optoelectronics Inc	1.3%	—	975,318	—	$144.5M
AKAMAkamai Technologies Inc	1.3%	1.2%	1,136,573	+9.6%	$134.4M
ASHAshland Inc	1.2%	1.1%	1,999,908	+4.6%	$131.8M
LSCCLattice Semiconductor Corp	1.2%	0.6%	821,848	+35.8%	$125.7M
BPOPPopular	1.1%	1.1%	725,227	-9.5%	$119.1M
MDBMongodb Inc	1.0%	—	334,098	—	$112.2M
UTHRUnited Therapeutics Corp	1.0%	1.5%	206,808	-18.2%	$112.1M
KNXKnight-Swift Transn Hldgs in	1.0%	1.2%	1,410,955	-32.4%	$109.9M
EXPEagle Materials Inc	1.0%	1.2%	458,621	-24.9%	$103.2M
LRNStride Inc	1.0%	1.4%	1,191,710	-23.1%	$102.8M
XPOXpo Inc	1.0%	1.3%	499,601	-23.4%	$102.6M
BBIOBridgebio Pharma Inc	1.0%	0.7%	1,373,057	+43.3%	$102.3M
LBRTLiberty Energy Inc	0.9%	0.7%	3,720,666	+49.2%	$97.4M
SANMSanmina Corporation	0.9%	0.8%	378,111	-40.7%	$95.7M
UCTTUltra Clean Hldgs Inc	0.9%	1.1%	667,532	-62.7%	$95.2M
RAREUltragenyx Pharmaceutical in	0.9%	—	2,847,936	—	$95.1M
PODDInsulet Corp	0.9%	—	622,506	—	$94.8M
MODModine Mfg Co	0.9%	—	343,868	—	$91.8M
FLSFlowserve Corp	0.9%	—	1,233,291	—	$91.5M
KEXKirby Corp	0.8%	0.9%	666,554	+3.4%	$90.6M
ALGTAllegiant Travel Co	0.8%	—	765,347	—	$90.0M
PSTGPure Storage Inc - Class A	0.8%	0.6%	1,120,040	+18.6%	$88.2M
AMTMAmentum Hldgs Inc	0.8%	1.3%	4,143,971	-15.9%	$85.7M
KYMRKymera Therapeutics Inc	0.8%	0.7%	740,866	-2.5%	$85.0M
INSMInsmed Inc	0.8%	0.8%	795,242	+69.4%	$84.8M
ATIAti Inc	0.8%	1.0%	419,968	-39.5%	$82.8M
RNSTRenasant Corp	0.7%	0.6%	1,778,953	+4.5%	$75.7M
ALABAstera Labs Inc	0.7%	0.8%	154,601	-77.5%	$74.7M
RCLRoyal Caribbean Group	0.7%	0.7%	233,963	-1.8%	$74.3M
PVLAPalvella Therapeutics Inc	0.7%	—	478,833	—	$73.2M
DTDynatrace Inc	0.7%	—	1,635,587	—	$71.8M
INDIindie Semiconductor Inc	0.7%	0.6%	15,914,169	-17.3%	$71.5M
ADCAgree Rlty Corp	0.7%	0.9%	943,005	-14.4%	$71.4M
LUNRIntuitive Machines Inc	0.6%	0.7%	3,173,434	-9.7%	$67.9M
JAZZJazz Pharmaceuticals PLC	0.6%	1.0%	277,279	-46.4%	$66.8M
SAIASaia Inc	0.6%	0.7%	151,477	-17.0%	$63.8M
ENTGEntegris Inc Com	0.6%	0.9%	351,950	-53.4%	$63.3M
FBPFirst Bancorp Corporation	0.6%	0.6%	2,422,265	-17.2%	$63.1M
CRCLCircle Internet Group Inc	0.6%	1.5%	1,004,783	-35.1%	$62.9M
HUBBHubbell Inc	0.6%	—	119,997	—	$62.8M
AXSMAxsome Therapeutics Inc.	0.6%	—	254,280	—	$62.2M
FLEXFlex Ltd	0.6%	—	382,135	—	$61.9M
WTFCWintrust Financial Corp	0.6%	0.7%	384,593	-16.8%	$61.8M
TDWTidewater Inc	0.6%	0.9%	894,796	-16.6%	$59.6M
ATMUTmus Filtration Technologie	0.6%	—	1,157,930	—	$59.0M
JBLJabil Inc	0.5%	—	152,187	—	$58.7M
BLDRBuilders Firstsource Inc	0.5%	0.7%	651,389	-24.3%	$58.3M

What Frontier Capital Management Co LLC bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +69.3% /yr; S&P 500 +20.1%
3 years: +35.2% /yr; S&P 500 +20.4%
5 years: +20.5% /yr; S&P 500 +11.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value and rebuilt each quarter on the day the filing became public. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$10.7B	300
Q1 2026	$9.7B	291
Q4 2025	$9.4B	295
Q3 2025	$11.2B	297
Q2 2025	$10.8B	294
Q1 2025	$9.1B	283
Q4 2024	$10.5B	285
Q3 2024	$10.6B	281
Q2 2024	$10.1B	279
Q1 2024	$10.7B	269
Q4 2023	$9.9B	263
Q3 2023	$9.1B	267

Questions about Frontier Capital Management Co LLC's portfolio

What stocks does Frontier Capital Management Co LLC own?

Frontier Capital Management Co LLC's latest 13F, for Q2 2026 and filed Aug 14, 2026, lists 300 positions worth $10.7B. The largest are Ftai Aviation Ltd (FTAI) at 3.0%, Granite Construction Inc Com (GVA) at 1.6%, Alaska Air Group Inc (ALK) at 1.6%, Applied Optoelectronics Inc (AAOI) at 1.3% and Akamai Technologies Inc (AKAM) at 1.3%.

What did Frontier Capital Management Co LLC buy last quarter?

In Q2 2026, Frontier Capital Management Co LLC added Insmed Inc (INSM) (+69.4% shares), Liberty Energy Inc (LBRT) (+49.2% shares) and Bridgebio Pharma Inc (BBIO) (+43.3% shares), compared with its Q1 2026 filing.

What did Frontier Capital Management Co LLC sell last quarter?

In Q2 2026, Frontier Capital Management Co LLC cut from its top 50 Darling Ingredients Inc (DAR), cut from its top 50 Apogee Therapeutics Inc (APGE), cut from its top 50 Monolithic Power Systms Inc (MPWR), cut from its top 50 Burlington Stores Inc (BURL), cut from its top 50 Perdoceo Ed Corp (PRDO), Astera Labs Inc (ALAB) (-77.5% shares), Ultra Clean Hldgs Inc (UCTT) (-62.7% shares) and Entegris Inc Com (ENTG) (-53.4% shares), compared with its Q1 2026 filing.

How has Frontier Capital Management Co LLC's portfolio performed?

A portfolio copying Frontier Capital Management Co LLC's 20 largest 13F holdings each quarter, from the day each filing was public, returned +35.2% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +69.3% against +20.1%. Over 5 years: +20.5% a year against +11.6%.

When is Frontier Capital Management Co LLC's next 13F filing due?

13F filings are due 45 days after each quarter ends. Frontier Capital Management Co LLC's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does Frontier Capital Management Co LLC manage?

Frontier Capital Management Co LLC reported $9.6B of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $10.7B.