FRONTIER CAPITAL MANAGEMENT CO LLC

CIK

351173

Location

Boston, MA

Portfolio Value

Mid $9,729,472,588

Diversification

Diversified

Filing Date

Global Rank

#422 / 8,586 ▲ 23

Top Industry

Biotechnology 7.3%

3Y Alpha vs SPY

+0.3%

Period ended 3 months ago

Filed May 15, 2026 · 32d

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

+79.2%

SPY

+78.1%

Annualised alpha

+0.3%

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 1–50 of 291 positions by value · page 1 of 6

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
BWA	Borgwarner Inc Consumer Cyclical	NEW	4,003	NEW	$217,202	NEW	0.00%
ULTA	Ulta Beauty, Inc. Consumer Cyclical	Added	497	+55	$259,786	−2.9%	0.00%
LKQ	Lkq Corp Consumer Cyclical	Held	8,916	0	$261,862	−2.7%	0.00%
SBAC	Sba Communications Corp Real Estate	Held	1,600	0	$275,376	−11.0%	0.00%
JLL	Jones Lang Lasalle Inc Real Estate	Added	933	+116	$283,930	+3.3%	0.00%
VTRS	Viatris Inc Healthcare	NEW	21,914	NEW	$296,058	NEW	0.00%
AVY	Avery Dennison Corp Consumer Cyclical	Added	1,764	+661	$304,607	+51.8%	0.00%
LPLA	LPL Financial Holdings Inc. Financial Services	NEW	1,017	NEW	$305,944	NEW	0.00%
IONQ	IonQ, Inc. Technology	Reduced	10,630	-362,615	$306,462	−98.2%	0.00%
NTAP	NetApp, Inc. Technology	Added	3,009	+1,001	$308,091	+43.3%	0.00%
LAMR	Lamar Advertising Co/New Real Estate	Held	2,544	0	$322,223	+0.1%	0.00%
LH	Labcorp Holdings Inc. Healthcare	Held	1,233	0	$328,976	+6.3%	0.00%
ALHC	Alignment Healthcare, Inc. Healthcare	NEW	18,820	NEW	$331,608	NEW	0.00%
RPRX	Royalty Pharma plc Healthcare	Held	8,070	0	$387,117	+24.1%	0.00%
AJG	Arthur J. Gallagher & Co. Financial Services	NEW	1,789	NEW	$387,461	NEW	0.00%
GNRC	Generac Holdings Inc. Industrials	Added	2,095	+208	$409,216	+59.0%	0.00%
CTRA	Coterra Energy Inc. Energy	Held	12,509	0	$439,566	+33.5%	0.00%
NI	Nisource Inc. Utilities	Held	12,822	0	$598,274	+11.7%	0.01%
PSN	Parsons Corp Technology	Reduced	11,310	-196,828	$612,662	−95.2%	0.01%
SHLS	Shoals Technologies Group, Inc. Technology	Added	97,840	+11,629	$643,787	−12.1%	0.01%
PGY	Pagaya Technologies Ltd. Technology	Reduced	196,696	-844,166	$2,291,508	−89.5%	0.02%
VRDN	Viridian Therapeutics, Inc.DE Healthcare	NEW	158,371	NEW	$3,097,736	NEW	0.03%
ZS	Zscaler, Inc. Technology	Reduced	34,449	-35,086	$4,832,850	−69.1%	0.05%
GXO	GXO Logistics, Inc. Industrials	NEW	94,925	NEW	$4,921,861	NEW	0.05%
VEEV	Veeva Systems Inc Healthcare	Reduced	30,253	-50,603	$5,314,241	−70.6%	0.05%
ROST	Ross Stores, Inc. Consumer Cyclical	Reduced	26,507	-12,761	$5,742,211	−18.8%	0.06%
POOL	Pool Corp Industrials	NEW	28,597	NEW	$5,786,031	NEW	0.06%
EVTL	Vertical Aerospace Ltd. Industrials	Added	2,770,217	+1,527,883	$6,122,179	−7.5%	0.06%
GDYN	Grid Dynamics Holdings, Inc. Technology	Reduced	1,129,076	-42,730	$6,435,733	−39.2%	0.07%
THRM	Gentherm Inc Consumer Cyclical	Added	237,152	+120,337	$6,588,082	+55.1%	0.07%
RSI	Rush Street Interactive, Inc. Consumer Cyclical	Reduced	307,217	-229,481	$6,681,969	−35.9%	0.07%
MSCI	MSCI Inc. Financial Services	Reduced	12,465	-1,072	$6,718,759	−13.5%	0.07%
SITM	SITIME Corp Technology	Reduced	19,671	-5,400	$6,793,379	−23.3%	0.07%
FND	Floor & Decor Holdings, Inc. Consumer Cyclical	Reduced	142,875	-51,965	$7,258,050	−38.8%	0.07%
TTD	Trade Desk, Inc. Communication Services	Added	321,192	+214,277	$7,287,846	+79.6%	0.07%
LW	Lamb Weston Holdings, Inc. Consumer Defensive	Reduced	177,794	-261,968	$7,513,574	−59.2%	0.08%
CCOI	Cogent Communications Holdings, Inc. Communication Services	Added	399,208	+53,405	$7,521,078	+0.9%	0.08%
TNDM	Tandem Diabetes Care Inc Healthcare	Reduced	397,209	-15,060	$7,614,496	−16.0%	0.08%
XYZ	Block, Inc. Technology	Reduced	131,628	-149,010	$7,921,373	−56.6%	0.08%
IRTC	iRhythm Holdings, Inc. Healthcare	Reduced	68,454	-2,594	$8,078,941	−35.9%	0.08%
DKNG	DraftKings Inc. Consumer Cyclical	Reduced	383,138	-434,446	$8,283,443	−70.6%	0.09%
CRL	Charles River Laboratories International, Inc. Healthcare	Reduced	48,062	-75,639	$8,290,695	−66.4%	0.09%
SKY	Champion Homes, Inc. Consumer Cyclical	Added	111,731	+19,158	$8,309,434	+6.2%	0.09%
ALGM	Allegro Microsystems, Inc. Technology	Reduced	264,031	-260,900	$8,324,897	−39.9%	0.09%
MSI	Motorola Solutions, Inc. Technology	NEW	19,524	NEW	$8,472,830	NEW	0.09%
VCEL	Vericel Corp Healthcare	Reduced	273,725	-139,980	$8,805,733	−40.9%	0.09%
NDAQ	Nasdaq, Inc. Financial Services	Reduced	106,895	-59,944	$9,074,316	−44.0%	0.09%
WRB	Berkley W R Corp Financial Services	Reduced	139,425	-4,916	$9,241,089	−8.7%	0.09%
TRU	TransUnion Financial Services	Reduced	136,442	-188,512	$9,440,421	−66.1%	0.10%
ALB	Albemarle Corp Basic Materials	Reduced	52,754	-31,270	$9,470,925	−20.3%	0.10%