FRONTIER CAPITAL MANAGEMENT CO LLC

CIK

351173

Location

Boston, MA

Portfolio Value

Mid $9,729,472,588

Diversification

Diversified

Filing Date

Global Rank

#422 / 8,588 ▲ 23

Top Industry

Biotechnology 7.3%

3Y Alpha vs SPY

+0.1%

Period ended 3 months ago

Filed May 15, 2026 · 33d

25 quarters · since Mar 2020

Clone Performance

Jun 2023–Jun 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio

+77.3%

SPY

+76.8%

Annualised alpha

+0.1%

Max drawdown

−29.6%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

291 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025

Top Position

2.7%

−0.0 pts

Top 5

8.8%

−0.1 pts

Top 10

15.3%

+0.2 pts

HHI

Diversified+2

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Industrials	23.1%	$2,246,943,915	53
Technology	19.4%	$1,889,672,528	61
Healthcare	15.8%	$1,539,896,754	54
Financial Services	12.3%	$1,193,467,945	34
Consumer Cyclical	8.9%	$866,071,642	39
Energy	5.2%	$502,960,523	11
Consumer Defensive	5.1%	$500,969,258	9
Real Estate	4.5%	$437,762,124	12
Basic Materials	3.8%	$368,837,218	9
Utilities	1.1%	$109,916,318	4
Communication Services	0.8%	$72,974,363	5

Last Quarter's Activity

Export CSV

Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased

25 positions

Ticker	Company	Δ Shares	Shares	Value
LBRT	Liberty Energy Inc.	+2,313,093	2,494,222	$71,833,593
EVTL	Vertical Aerospace Ltd.	+1,527,883	2,770,217	$6,122,179
LRN	Stride, Inc.	+1,388,589	1,549,291	$136,600,987
RYZ	Ryerson Holding Corp	+1,142,154	1,517,062	$34,103,553
ALK	Alaska Air Group, Inc.	+1,092,815	3,373,587	$124,080,529
RXO	RXO, Inc.	+1,090,466	2,651,537	$38,765,470
FIP	FTAI Infrastructure Inc.	+978,729	7,555,692	$37,325,118
TRVI	Trevi Therapeutics, Inc.	+885,824	1,994,292	$23,791,903
BWIN	Baldwin Insurance Group, Inc.	+845,551	1,102,452	$24,187,796
LUNR	Intuitive Machines, Inc.	+844,720	3,513,799	$65,216,109
PWP	Perella Weinberg Partners	+646,762	1,867,595	$33,915,525
ACVA	ACV Auctions Inc.	+615,911	3,929,321	$16,660,321
APGE	Apogee Therapeutics, Inc.	+584,030	1,064,483	$89,597,534
AKAM	Akamai Technologies Inc	+579,514	1,036,569	$119,049,949
URGN	UroGen Pharma Ltd.	+532,492	1,314,112	$23,627,733
KEX	Kirby Corp	+511,397	644,329	$85,618,437
VOYG	Voyager Technologies, Inc./DE	+489,319	1,227,187	$28,703,903
ASH	Ashland Inc.	+487,400	1,912,689	$106,364,635
ODD	Oddity Tech Ltd	+458,416	797,138	$10,665,706
CRCL	Circle Internet Group, Inc.	+418,046	1,548,150	$147,708,991
SILA	Sila Realty Trust, Inc.	+412,327	2,696,692	$63,857,666
INDI	indie Semiconductor, Inc.	+402,594	19,246,088	$61,972,403
FLR	Fluor Corp	+397,711	671,777	$31,338,397
GTX	Garrett Motion Inc.	+393,390	2,675,133	$48,607,166
ERO	Ero Copper Corp.	+392,852	1,250,947	$33,362,756
No positions match the current search.

Trimmed

Positions the filer reduced

25 positions

Ticker	Company	Δ Shares	Shares	Value
SNCY	Sun Country Airlines Holdings, LLC	−2,703,202	584,311	$9,652,817
MAT	Mattel Inc /De/	−2,524,008	1,691,423	$24,576,376
UCTT	Ultra Clean Holdings, Inc.	−1,722,388	1,787,451	$111,143,703
PGY	Pagaya Technologies Ltd.	−844,166	196,696	$2,291,508
AMTM	Amentum Holdings, Inc.	−842,766	4,930,210	$128,579,876
WEAV	Weave Communications, Inc.	−752,884	2,099,389	$9,699,177
CWK	Cushman & Wakefield Ltd.	−741,689	2,810,943	$34,462,161
ATI	Ati Inc	−533,031	694,422	$101,010,624
DOCN	DigitalOcean Holdings, Inc.	−495,321	457,157	$39,214,927
DKNG	DraftKings Inc.	−434,446	383,138	$8,283,443
MKSI	Mks Inc	−389,485	161,250	$37,056,862
TER	Teradyne, Inc	−388,036	183,204	$54,312,657
LSCC	Lattice Semiconductor Corp	−373,321	605,318	$56,149,297
IONQ	IonQ, Inc.	−362,615	10,630	$306,462
HXL	Hexcel Corp /De/	−360,011	140,148	$11,342,177
DYN	Dyne Therapeutics, Inc.	−317,019	821,849	$14,900,122
RNST	Renasant Corp	−305,819	1,702,713	$61,519,020
TTI	Tetra Technologies Inc	−300,242	2,147,230	$18,294,399
ENTG	Entegris Inc	−292,792	754,706	$88,481,731
BKU	BankUnited, Inc.	−278,497	492,646	$22,247,893
COHR	Coherent Corp.	−278,033	112,906	$26,895,338
DAR	Darling Ingredients Inc.	−264,729	2,455,668	$151,883,065
LW	Lamb Weston Holdings, Inc.	−261,968	177,794	$7,513,574
ALGM	Allegro Microsystems, Inc.	−260,900	264,031	$8,324,897
SIMO	Silicon Motion Technology CORP	−239,115	272,356	$30,582,855
No positions match the current search.

New Positions

Positions the filer opened this quarter

25 positions

Ticker	Company	Shares	Value
AR	ANTERO RESOURCES Corp	1,349,237	$57,261,618
GPOR	Gulfport Energy Corp	221,949	$46,957,749
PVLA	Palvella Therapeutics, Inc.	374,035	$46,623,462
LMND	Lemonade, Inc.	672,383	$42,144,966
CIFR	Cipher Digital Inc.	3,079,999	$39,639,587
SFNC	Simmons First National Corp	1,792,102	$34,856,383
COR	Cencora, Inc.	109,048	$34,256,338
AGI	Alamos Gold Inc	724,588	$32,193,444
AAOI	Applied Optoelectronics, Inc.	284,146	$24,035,910
CHE	Chemed Corp	62,726	$23,694,119
MUSA	Murphy USA Inc.	42,455	$20,971,496
PRAX	Praxis Precision Medicines, Inc.	53,365	$17,193,669
WDAY	Workday, Inc.	114,315	$14,851,804
ACHC	Acadia Healthcare Company, Inc.	575,243	$13,454,933
RRC	Range Resources Corp	297,521	$13,441,998
SYNA	SYNAPTICS Inc	184,946	$12,953,617
DECK	Deckers Outdoor Corp	128,616	$12,873,175
CVLT	Commvault Systems Inc	161,115	$12,549,247
SOLS	Solstice Advanced Materials Inc.	162,338	$12,363,662
SWKS	Skyworks Solutions, Inc.	181,435	$9,715,844
MSI	Motorola Solutions, Inc.	19,524	$8,472,830
POOL	Pool Corp	28,597	$5,786,031
GXO	GXO Logistics, Inc.	94,925	$4,921,861
VRDN	Viridian Therapeutics, Inc.DE	158,371	$3,097,736
AJG	Arthur J. Gallagher & Co.	1,789	$387,461
No positions match the current search.

Sold Out

Positions the filer fully exited

25 positions

Ticker	Company	Shares	Value
WBS	Webster Financial Corp	800,420	$50,378,434
U	Unity Software Inc.	1,050,468	$46,399,171
BILL	BILL Holdings, Inc.	641,710	$34,998,863
ONON	On Holding AG	365,478	$16,987,417
AESI	Atlas Energy Solutions Inc.	1,655,363	$15,593,519
FLYW	Flywire Corp	1,098,194	$15,550,427
MGNI	Magnite, Inc.	944,701	$15,332,497
MXL	Maxlinear, Inc	819,504	$14,283,954
INSP	Inspire Medical Systems, Inc.	142,007	$13,097,305
BWXT	BWX Technologies, Inc.	70,868	$12,248,825
PAYC	Paycom Software, Inc.	68,904	$10,980,541
DVN	Devon Energy Corp/De	279,196	$10,226,949
GPK	Graphic Packaging Holding Co	672,224	$10,123,693
TYL	Tyler Technologies Inc	20,711	$9,401,758
KKR	KKR & Co. Inc.	65,002	$8,286,454
TWLO	Twilio Inc	56,555	$8,044,383
SG	Sweetgreen, Inc.	1,051,122	$7,105,584
APP	AppLovin Corp	10,496	$7,072,414
KTOS	Kratos Defense & Security Solutions, Inc.	91,909	$6,976,812
ROG	Rogers Corp	72,167	$6,608,332
CDW	CDW Corp	46,667	$6,356,045
ACM	Aecom	65,698	$6,262,990
ZETA	Zeta Global Holdings Corp.	293,526	$5,973,254
ENVX	Enovix Corp	809,513	$5,917,540
SLNO	Soleno Therapeutics Inc	119,695	$5,541,878
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

291 positions · $9,729,472,588 total · as of Mar 31, 2026

All sectors Basic Materials Communication Services Consumer Cyclical Consumer Defensive Energy Financial Services Healthcare Industrials Real Estate Technology Utilities

Showing 201–250 of 291 positions by value · page 5 of 6

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
FIP	FTAI Infrastructure Inc. Industrials	Reduced	7,555,692	-5,598,234	$37,325,118	−38.4%	0.38%
PLNT	Planet Fitness, Inc. Consumer Cyclical	Added	506,609	+202,738	$37,681,577	+14.3%	0.39%
LXP	LXP Industrial Trust Real Estate	Added	817,235	+26,650	$37,805,291	−3.6%	0.39%
TKR	Timken Co Industrials	Reduced	378,192	-169,643	$38,034,769	−17.5%	0.39%
NMIH	NMI Holdings, Inc. Financial Services	Reduced	1,016,226	-42,952	$38,118,637	−11.8%	0.39%
EPRT	Essential Properties Realty Trust, Inc. Real Estate	Reduced	1,266,487	-177,474	$38,450,545	−10.2%	0.40%
TFIN	Triumph Financial, Inc. Financial Services	Reduced	644,777	-107,120	$38,467,395	−18.3%	0.40%
RXO	RXO, Inc. Industrials	Added	2,651,537	+1,090,466	$38,765,470	+96.5%	0.40%
GWRE	Guidewire Software, Inc. Technology	Added	259,527	+139,964	$38,814,858	+61.5%	0.40%
CRS	Carpenter Technology Corp Industrials	Reduced	99,134	-49,410	$39,073,666	−16.5%	0.40%
DOCN	DigitalOcean Holdings, Inc. Technology	Reduced	457,157	-495,321	$39,214,927	−14.4%	0.40%
CIFR	Cipher Digital Inc. Technology	NEW	3,079,999	NEW	$39,639,587	NEW	0.41%
COHU	Cohu Inc Technology	Reduced	1,294,616	-104,281	$39,641,141	+21.8%	0.41%
ARW	Arrow Electronics, Inc. Technology	Reduced	280,747	-12,462	$40,261,927	+24.6%	0.41%
DIOD	Diodes Inc /Del/ Technology	Reduced	592,499	-26,399	$40,443,981	+32.4%	0.42%
NUVL	Nuvalent, Inc. Healthcare	Added	395,546	+125,076	$40,523,687	+48.9%	0.42%
RRX	Regal Rexnord Corp Industrials	Reduced	217,910	-171,180	$40,805,826	−25.3%	0.42%
ATMU	Atmus Filtration Technologies Inc. Consumer Cyclical	Added	742,221	+88,667	$42,135,886	+24.2%	0.43%
LMND	Lemonade, Inc. Financial Services	NEW	672,383	NEW	$42,144,966	NEW	0.43%
IRT	Independence Realty Trust, Inc. Real Estate	Reduced	2,869,720	-202,645	$42,730,130	−20.4%	0.44%
JBL	Jabil Inc Technology	Added	164,827	+3,429	$43,782,996	+19.0%	0.45%
CVSA	Covista Inc. Consumer Defensive	Reduced	381,161	-16,565	$43,928,805	+6.7%	0.45%
PR	Permian Resources Corp Energy	Reduced	2,071,205	-23,588	$44,158,090	+50.2%	0.45%
MOD	Modine Manufacturing Co Consumer Cyclical	Added	204,039	+44,560	$44,217,291	+107.7%	0.45%
WSFS	Wsfs Financial Corp Financial Services	Reduced	675,496	-117,005	$44,217,968	+1.0%	0.45%
RARE	Ultragenyx Pharmaceutical Inc. Healthcare	Added	2,191,182	+226,098	$45,905,262	+1.6%	0.47%
PVLA	Palvella Therapeutics, Inc. Healthcare	NEW	374,035	NEW	$46,623,462	NEW	0.48%
AIR	Aar Corp Industrials	Reduced	427,187	-43,450	$46,759,889	+20.0%	0.48%
GPOR	Gulfport Energy Corp Energy	NEW	221,949	NEW	$46,957,749	NEW	0.48%
GTX	Garrett Motion Inc. Consumer Cyclical	Added	2,675,133	+393,390	$48,607,166	+22.2%	0.50%
ALGT	Allegiant Travel CO Industrials	Added	601,215	+142,626	$48,722,463	+24.6%	0.50%
SNX	Td Synnex Corp Technology	Reduced	293,282	-12,776	$49,479,606	+7.6%	0.51%
MDU	Mdu Resources Group Inc Utilities	Reduced	2,506,549	-109,420	$51,935,695	+1.7%	0.53%
MTDR	Matador Resources Co Energy	Added	823,306	+63,597	$52,016,473	+61.3%	0.53%
BDC	Belden Inc. Technology	Reduced	455,338	-6,702	$52,286,462	−2.9%	0.54%
MDB	MongoDB, Inc. Technology	Reduced	214,316	-87,777	$52,458,127	−58.6%	0.54%
LCII	Lci Industries Consumer Cyclical	Reduced	429,091	-166,751	$52,769,611	−27.0%	0.54%
KBR	Kbr, Inc. Industrials	Added	1,434,095	+52,520	$52,860,741	−4.8%	0.54%
FAF	First American Financial Corp Financial Services	Added	880,804	+37,459	$53,103,673	+2.5%	0.55%
MRVL	Marvell Technology, Inc. Technology	Added	540,979	+11,996	$53,583,969	+19.2%	0.55%
STAG	STAG Industrial, Inc. Real Estate	Added	1,501,567	+34,365	$54,146,506	+0.4%	0.56%
TER	Teradyne, Inc Technology	Reduced	183,204	-388,036	$54,312,657	−50.9%	0.56%
FR	First Industrial Realty Trust Inc Real Estate	Reduced	946,365	-51,892	$54,747,215	−4.2%	0.56%
SIGI	Selective Insurance Group Inc Financial Services	Added	729,748	+114,530	$55,015,701	+6.9%	0.57%
EBC	Eastern Bankshares, Inc. Financial Services	Reduced	2,840,293	-121,450	$55,556,131	+1.8%	0.57%
P	Everpure, Inc. Technology	Added	944,522	+63,597	$55,764,578	−5.5%	0.57%
LSCC	Lattice Semiconductor Corp Technology	Reduced	605,318	-373,321	$56,149,297	−22.0%	0.58%
ELAN	Elanco Animal Health Inc Healthcare	Reduced	2,362,526	-213,976	$56,535,247	−3.0%	0.58%
AR	ANTERO RESOURCES Corp Energy	NEW	1,349,237	NEW	$57,261,618	NEW	0.59%
NTRA	Natera, Inc. Healthcare	Reduced	294,347	-227,403	$58,866,456	−50.8%	0.61%