FRONTIER CAPITAL MANAGEMENT CO LLC

CIK

351173

Location

Boston, MA

Portfolio Value

Small $368,837,218

Diversification

Diversified

Filing Date

Global Rank

#421 / 8,578 ▲ 16

Top Industry

Biotechnology 7.3%

3Y Alpha vs SPY

+0.1%

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

+78.7%

SPY

+78.1%

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

9 positions · $368,837,218 total · Basic Materials only · as of Mar 31, 2026

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

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
EXP	Eagle Materials Inc Basic Materials	Added	610,654	+65,305	$115,688,400	+2.6%	31.37%
ASH	Ashland Inc. Basic Materials	Added	1,912,689	+487,400	$106,364,635	+27.2%	28.84%
KNF	Knife River Corp Basic Materials	Reduced	409,487	-18,025	$33,434,613	+11.2%	9.06%
ERO	Ero Copper Corp. Basic Materials	Added	1,250,947	+392,852	$33,362,756	+37.4%	9.05%
AGI	Alamos Gold Inc Basic Materials	NEW	724,588	NEW	$32,193,444	NEW	8.73%
MP	MP Materials Corp. / DE Basic Materials	Added	273,495	+68,696	$13,198,868	+27.6%	3.58%
JHX	James Hardie Industries plc Basic Materials	Added	673,702	+159,854	$12,759,915	+19.7%	3.46%
SOLS	Solstice Advanced Materials Inc. Basic Materials	NEW	162,338	NEW	$12,363,662	NEW	3.35%
ALB	Albemarle Corp Basic Materials	Reduced	52,754	-31,270	$9,470,925	−20.3%	2.57%