Stocks/Funds/CIK 351173

FRONTIER CAPITAL MANAGEMENT CO LLC

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 351173
Assets
$9.65B
+6.0% YoY
Holdings
290
Lifetime alpha vs market
-2.01% annual
Average hold time
3.9 yr
median 2.8 yr

Quarterly history

Cum return +40% vs S&P +52% · α -12% lifetimeAUM $9.7B · peak $15.5BFlow $-101M (-1%)2016-032017-092019-032020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-13.56%
trims when stocks drop
when a holding falls −10%+
Middle response
-6.18%
baseline attrition
Rally response
-6.29%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
$260M2.7%3.5 yr
DARDarling Ingredients Inc.$152M1.6%+98.0%8.0 yr
UTHRUnited Therapeutics Corp$150M1.6%+92.4%7.5 yr
CRCLCircle Internet Group$148M1.5%0.5 yr
GVAGranite Construction Inc$142M1.5%+59.6%10.0 yr
LRNStride, Inc.$137M1.4%-30.3%1.8 yr
AMTMAmentum Holdings, Inc.$129M1.3%+43.3%1.3 yr
XPOXPO Logistics, Inc.$127M1.3%+80.8%5.0 yr
ALKAlaska Air Group, Inc.$124M1.3%-25.3%7.0 yr
KNXKnight-Swift Transportat$120M1.2%+34.4%8.5 yr
AKAMAkamai Technologies, Inc$119M1.2%+42.7%3.5 yr
EXPEagle Materials Inc.$116M1.2%-14.2%10.3 yr
UCTTUltra Clean Holdings, In$111M1.2%+190.4%5.8 yr
BPOPPopular, Inc.$107M1.1%+48.9%10.3 yr
ASHAshland Inc.$106M1.1%-3.4%0.8 yr

Portfolio composition (YoY)

Industry mix
Semiconductors8.5%+2.7pp$820M
Biotechnology7.0%+4.9pp$680M
Banks - Regional6.7%+1.0pp$645M
Unknown5.4%+2.3pp$517M
Aerospace & Defense3.8%+1.9pp$367M
Engineering & Construction3.1%+0.3pp$297M
Hardware, Equipment & Parts2.8%-0.2pp$274M
Financial - Capital Markets2.8%+2.3pp$268M
Software - Infrastructure2.8%-2.9pp$266M
Oil & Gas Equipment & Services2.6%+1.1pp$248M
Country
US90.5%-2.4pp
Unknown5.4%+2.3pp
IE1.5%-0.1pp
CA0.9%+0.4pp
CH0.6%-0.2pp
HK0.3%-0.0pp
GB0.3%
SG0.2%+0.0pp
Top 5: 8.8% · Top 10: 15.4% · Top 25: 30.3%

Winners

TickerPrev $PnLYoY %
ATI$135M+0.24B179.6%
XPO$127M+0.10B80.8%
UTHR$97M+0.09B92.4%
UCTT$42M+0.08B190.4%
MPWR$75M+0.07B89.6%

Losers

TickerPrev $PnLYoY %
BLDR$79M-0.03B-34.1%
EXP$136M-0.02B-14.2%
ALK$28M-0.01B-25.3%
LRN$12M-0.00B-30.3%

Top buys this quarter · 15

LRN Stride, Inc.+$122M
KEX Kirby Corporation+$68M
LBRT Liberty Energy Inc.+$67M
AKAM Akamai Technologies, Inc.+$67M
JAZZ Jazz Pharmaceuticals plc+$63M
AR Antero Resources Corporationnew+$57M
GPOR Gulfport Energy Corporationnew+$47M
PVLA Palvella Therapeutics, Inc.new+$47M
UTHR United Therapeutics Corporatio+$42M
LMND Lemonade, Inc.new+$42M

Top sells this quarter · 15

TER Teradyne, Inc.$115M
UCTT Ultra Clean Holdings, Inc.$89M
BWA BorgWarner Inc.$92M
MKSI MKS Inc.$90M
ATI ATI Inc.$78M
COHR Coherent, Inc.$66M
WBS Webster Financial Corporationexit$56M
NTRA Natera, Inc.$45M
SNCY Sun Country Airlines Holdings,$45M
DOCN DigitalOcean Holdings, Inc.$42M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$9.65B290+28.28%+17.59%+10.69%-0.10B
2025-12-31$9.37B294+10.49%+17.72%-7.23%-2.04B
2025-09-30$11.11B296+8.43%+17.52%-9.09%-0.35B
2025-06-30$10.79B293+10.26%+14.94%-4.68%+0.50B
2025-03-31$9.10B282-5.87%+8.30%-14.17%-0.30B
2024-12-31$10.49B284+13.60%+24.89%-11.28%-0.18B
2024-09-30$10.58B280+25.16%+36.04%-10.87%-0.27B
2024-06-30$10.05B278+10.21%+24.49%-14.28%-0.25B
2024-03-31$10.68B268+23.25%+29.62%-6.37%-0.03B
2023-12-31$9.90B263+22.03%+26.18%-4.14%-0.21B
2023-09-30$9.10B267+21.21%+21.57%-0.36%-0.83B
2023-06-30$10.44B261+24.60%+19.42%+5.17%+0.01B
2023-03-31$9.67B257-5.74%-7.82%+2.07%-0.16B
2022-12-31$9.18B262+10.35%+7.56%+2.79%-0.23B
2022-09-30$8.53B268-2.26%-4.93%+2.67%+0.04B
2022-06-30$8.69B274-18.40%-16.11%-2.28%-0.32B