FRONTIER CAPITAL MANAGEMENT CO LLC

CIK

351173

Location

Boston, MA

Portfolio Value

Large $10,728,147,297

Diversification

Diversified

Filing Date

Global Rank

#462 / 8,700 ▲ 28

Top Industry

Biotechnology 9.1%

Period ended 2 months ago

Filed Aug 14, 2026 · 29d

26 quarters · since Mar 2020

Portfolio Concentration

300 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026

Top Position

3.0%

+0.3 pts

Top 5

8.9%

+0.0 pts

Top 10

14.5%

−1.0 pts

HHI

Diversified−4

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026

Sector	% Portfolio	Value	Positions
Industrials	24.7%	$2,647,083,828	59
Technology	22.0%	$2,362,060,670	58
Healthcare	17.5%	$1,873,598,022	56
Financial Services	11.3%	$1,211,882,317	37
Consumer Cyclical	8.0%	$859,768,381	35
Energy	4.1%	$437,042,227	12
Basic Materials	3.8%	$406,457,173	10
Real Estate	3.5%	$370,276,496	14
Consumer Defensive	3.2%	$344,056,315	9
Communication Services	1.1%	$120,913,492	5
Utilities	0.9%	$95,008,376	5

Last Quarter's Activity

Export CSV

Jun 30, 2026 vs Mar 31, 2026

Added To

Positions the filer increased

25 positions

Ticker	Company	Δ Shares	Shares	Value
GENI	Genius Sports Ltd	+4,464,966	9,432,864	$57,163,155
EVTL	Vertical Aerospace Ltd.	+2,632,304	5,402,521	$9,400,386
PGY	Pagaya Technologies Ltd.	+2,099,721	2,296,417	$41,909,610
ACVA	ACV Auctions Inc.	+1,884,339	5,813,660	$41,800,215
AVTR	Avantor, Inc.	+1,482,960	3,506,970	$34,719,003
LBRT	Liberty Energy Inc.	+1,226,444	3,720,666	$97,444,242
ACHC	Acadia Healthcare Company, Inc.	+1,097,614	1,672,857	$49,399,467
TRVI	Trevi Therapeutics, Inc.	+1,076,448	3,070,740	$57,269,301
ODD	Oddity Tech Ltd	+1,041,262	1,838,400	$27,814,992
BWIN	Baldwin Insurance Group, Inc.	+995,206	2,097,658	$55,755,749
FLS	Flowserve Corp	+770,843	1,233,291	$91,460,860
VERA	Vera Therapeutics, Inc.	+743,912	1,295,405	$55,585,828
FIP	FTAI Infrastructure Inc.	+702,012	8,257,704	$38,315,746
AAOI	Applied Optoelectronics, Inc.	+691,172	975,318	$144,503,114
APG	APi Group Corp	+657,024	1,203,831	$50,982,242
RARE	Ultragenyx Pharmaceutical Inc.	+656,754	2,847,936	$95,092,583
IONQ	IonQ, Inc.	+655,774	666,404	$35,492,677
PRCT	PROCEPT BioRobotics Corp	+481,671	1,091,528	$24,646,702
PODD	Insulet Corp	+449,993	622,506	$94,776,538
ATMU	Atmus Filtration Technologies Inc.	+415,709	1,157,930	$59,042,850
BBIO	BridgeBio Pharma, Inc.	+415,068	1,373,057	$102,265,285
WEAV	Weave Communications, Inc.	+346,815	2,446,204	$14,652,761
INSM	INSMED Inc	+325,681	795,242	$84,788,702
ERO	Ero Copper Corp.	+289,116	1,540,063	$41,196,685
OLED	Universal Display Corp \Pa\	+254,490	364,719	$31,581,018
No positions match the current search.

Trimmed

Positions the filer reduced

25 positions

Ticker	Company	Δ Shares	Shares	Value
INDI	indie Semiconductor, Inc.	−3,331,919	15,914,169	$71,454,618
—		−2,319,314	377,378	$11,457,196
DAR	Darling Ingredients Inc.	−1,661,802	793,866	$43,360,960
CIFR	Cipher Digital Inc.	−1,628,462	1,451,537	$35,562,656
RXO	RXO, Inc.	−1,625,314	1,026,223	$28,313,492
GTX	Garrett Motion Inc.	−1,208,312	1,466,821	$53,142,924
UCTT	Ultra Clean Holdings, Inc.	−1,119,919	667,532	$95,183,387
COHU	Cohu Inc	−1,093,782	200,834	$14,843,640
AMTM	Amentum Holdings, Inc.	−786,239	4,143,971	$85,655,880
APGE	Apogee Therapeutics, Inc.	−760,744	303,739	$40,315,277
KNX	Knight-Swift Transportation Holdings Inc.	−675,589	1,410,955	$109,871,065
VREX	Varex Imaging Corp	−615,007	535,000	$5,580,050
HOPE	Hope Bancorp Inc	−597,086	2,422,011	$33,133,110
CRCL	Circle Internet Group, Inc.	−543,367	1,004,783	$62,929,559
ALAB	Astera Labs, Inc.	−533,612	154,601	$74,675,375
MDU	Mdu Resources Group Inc	−518,883	1,987,666	$42,158,395
PR	Permian Resources Corp	−512,589	1,558,616	$28,694,120
EBC	Eastern Bankshares, Inc.	−508,271	2,332,022	$51,864,169
CWK	Cushman & Wakefield Ltd.	−504,959	2,305,984	$30,877,125
FBP	First Bancorp /Pr/	−501,473	2,422,265	$63,148,448
IRT	Independence Realty Trust, Inc.	−492,980	2,376,740	$39,667,790
ENTG	Entegris Inc	−402,756	351,950	$63,301,727
LTH	Life Time Group Holdings, Inc.	−401,940	534,657	$21,835,391
SIGI	Selective Insurance Group Inc	−374,029	355,719	$34,508,300
MAT	Mattel Inc /De/	−369,113	1,322,310	$18,353,662
No positions match the current search.

New Positions

Positions the filer opened this quarter

25 positions

Ticker	Company	Shares	Value
DT	Dynatrace, Inc.	1,635,587	$71,818,625
PRIM	Primoris Services Corp	468,762	$46,463,689
SARO	StandardAero, Inc.	1,449,333	$43,349,550
ALKS	Alkermes plc.	659,562	$34,561,048
ETOR	eToro Group Ltd.	832,037	$32,840,500
ST	Sensata Technologies Holding plc	657,792	$31,402,990
MANE	Veradermics, Inc	254,876	$31,334,455
UAMY	United States Antimony Corp	4,297,224	$31,197,846
MOH	Molina Healthcare, Inc.	128,459	$29,378,573
HALO	Halozyme Therapeutics, Inc.	342,570	$26,812,953
SXI	Standex International Corp/De/	73,861	$26,417,863
UMAC	Unusual Machines, Inc.	1,168,543	$26,058,508
CLYM	Climb Bio, Inc.	1,939,019	$25,284,807
PRCH	Porch Group, Inc.	1,547,453	$23,273,693
NBIS	Nebius Group N.V.	78,322	$21,630,186
VRSK	Verisk Analytics, Inc.	118,091	$21,200,877
VIK	Viking Holdings Ltd	196,715	$20,590,159
TGTX	Tg Therapeutics, Inc.	368,813	$20,262,586
LITE	Lumentum Holdings Inc.	21,893	$18,785,507
WTS	Watts Water Technologies Inc	47,013	$18,403,238
HOOD	Robinhood Markets, Inc.	182,543	$18,305,412
YSS	York Space Systems Inc.	733,025	$18,047,075
SYRE	Spyre Therapeutics, Inc.	182,931	$16,240,614
FRT	Federal Realty Investment Trust	90,572	$11,180,207
DCI	DONALDSON Co INC	94,808	$8,510,914
No positions match the current search.

Sold Out

Positions the filer fully exited

24 positions

Ticker	Company	Shares	Value
MRVL	Marvell Technology, Inc.	540,979	$53,583,969
DIOD	Diodes Inc /Del/	592,499	$40,443,981
APH	Amphenol Corp /De/	124,757	$31,526,093
QDEL	QuidelOrtho Corp	1,752,613	$28,795,431
DPZ	Dominos Pizza Inc	62,733	$22,507,973
ECG	Everus Construction Group, Inc.	143,499	$16,941,491
ANET	Arista Networks, Inc.	136,947	$16,814,352
TSCO	Tractor Supply Co /De/	362,574	$16,424,602
RMD	Resmed Inc	65,224	$14,641,483
CZR	Caesars Entertainment, Inc.	503,396	$13,304,756
KLAC	Kla Corp	8,099	$11,925,048
LULU	lululemon athletica inc.	77,472	$11,860,963
NDAQ	Nasdaq, Inc.	106,895	$9,074,316
TTD	Trade Desk, Inc.	321,192	$7,287,846
GDYN	Grid Dynamics Holdings, Inc.	1,129,076	$6,435,733
ROST	Ross Stores, Inc.	26,507	$5,742,211
VRDN	Viridian Therapeutics, Inc.\DE	158,371	$3,097,736
SHLS	Shoals Technologies Group, Inc.	97,840	$643,787
PSN	Parsons Corp	11,310	$612,662
ALHC	Alignment Healthcare, Inc.	18,820	$331,608
LKQ	Lkq Corp	8,916	$261,862
—		584,311	$0
—		12,509	$0
—		395,546	$0
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

300 tracked positions · $10,728,147,297 total · filing declares 300 positions · $10,728,145,572 · as of Jun 30, 2026

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

Showing 1–50 of 300 positions by value · page 1 of 6

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
FTAI	FTAI Aviation Ltd. Industrials	Added	1,183,492	+121,282	$320,170,090	+23.0%	2.98%
GVA	Granite Construction Inc Industrials	Reduced	1,118,881	-68,855	$176,872,708	+24.2%	1.65%
ALK	Alaska Air Group, Inc. Industrials	Added	3,384,643	+11,056	$176,678,364	+42.4%	1.65%
AAOI	Applied Optoelectronics, Inc. Technology	Added	975,318	+691,172	$144,503,114	+501.2%	1.35%
AKAM	Akamai Technologies Inc Technology	Added	1,136,573	+100,004	$134,354,294	+12.9%	1.25%
ASH	Ashland Inc. Basic Materials	Added	1,999,908	+87,219	$131,773,938	+23.9%	1.23%
LSCC	Lattice Semiconductor Corp Technology	Added	821,848	+216,530	$125,709,870	+123.9%	1.17%
BPOP	Popular, Inc. Financial Services	Reduced	725,227	-75,703	$119,067,768	+10.8%	1.11%
MDB	MongoDB, Inc. Technology	Added	334,098	+119,782	$112,223,518	+113.9%	1.05%
UTHR	UNITED THERAPEUTICS Corp Healthcare	Reduced	206,808	-45,894	$112,054,778	−25.2%	1.04%
KNX	Knight-Swift Transportation Holdings Inc. Industrials	Reduced	1,410,955	-675,589	$109,871,065	−8.5%	1.02%
EXP	Eagle Materials Inc Basic Materials	Reduced	458,621	-152,033	$103,189,725	−10.8%	0.96%
LRN	Stride, Inc. Consumer Defensive	Reduced	1,191,710	-357,581	$102,773,070	−24.8%	0.96%
XPO	XPO, Inc. Industrials	Reduced	499,601	-152,472	$102,563,089	−19.2%	0.96%
BBIO	BridgeBio Pharma, Inc. Healthcare	Added	1,373,057	+415,068	$102,265,285	+43.8%	0.95%
LBRT	Liberty Energy Inc. Energy	Added	3,720,666	+1,226,444	$97,444,242	+35.7%	0.91%
SANM	Sanmina Corp Technology	Reduced	378,111	-259,277	$95,692,331	+15.8%	0.89%
UCTT	Ultra Clean Holdings, Inc. Technology	Reduced	667,532	-1,119,919	$95,183,387	−14.4%	0.89%
RARE	Ultragenyx Pharmaceutical Inc. Healthcare	Added	2,847,936	+656,754	$95,092,583	+107.1%	0.89%
PODD	Insulet Corp Healthcare	Added	622,506	+449,993	$94,776,538	+161.8%	0.88%
MOD	Modine Manufacturing Co Consumer Cyclical	Added	343,868	+139,829	$91,819,633	+107.7%	0.86%
FLS	Flowserve Corp Industrials	Added	1,233,291	+770,843	$91,460,860	+169.0%	0.85%
KEX	Kirby Corp Industrials	Added	666,554	+22,225	$90,631,347	+5.9%	0.84%
ALGT	Allegiant Travel CO Industrials	Added	765,347	+164,132	$90,004,807	+84.7%	0.84%
P	Everpure, Inc. Technology	Added	1,120,040	+175,518	$88,247,951	+58.3%	0.82%
AMTM	Amentum Holdings, Inc. Industrials	Reduced	4,143,971	-786,239	$85,655,880	−33.4%	0.80%
KYMR	Kymera Therapeutics, Inc. Healthcare	Reduced	740,866	-18,982	$84,955,104	+34.2%	0.79%
INSM	INSMED Inc Healthcare	Added	795,242	+325,681	$84,788,702	+10.4%	0.79%
ATI	Ati Inc Industrials	Reduced	419,968	-274,454	$82,775,692	−18.1%	0.77%
RNST	Renasant Corp Financial Services	Added	1,778,953	+76,240	$75,676,660	+23.0%	0.71%
ALAB	Astera Labs, Inc. Technology	Reduced	154,601	-533,612	$74,675,375	−1.0%	0.70%
RCL	Royal Caribbean Cruises Ltd Consumer Cyclical	Reduced	233,963	-4,336	$74,290,271	+13.3%	0.69%
PVLA	Palvella Therapeutics, Inc. Healthcare	Added	478,833	+104,798	$73,175,259	+56.9%	0.68%
DT	Dynatrace, Inc. Technology	NEW	1,635,587	NEW	$71,818,625	NEW	0.67%
INDI	indie Semiconductor, Inc. Technology	Reduced	15,914,169	-3,331,919	$71,454,618	+15.3%	0.67%
ADC	Agree Realty Corp Real Estate	Reduced	943,005	-158,381	$71,423,198	−14.0%	0.67%
LUNR	Intuitive Machines, Inc. Industrials	Reduced	3,173,434	-340,365	$67,879,753	+4.1%	0.63%
JAZZ	Jazz Pharmaceuticals plc Healthcare	Reduced	277,279	-240,005	$66,815,920	−31.7%	0.62%
SAIA	Saia Inc Industrials	Reduced	151,477	-31,015	$63,796,053	−0.5%	0.59%
ENTG	Entegris Inc Technology	Reduced	351,950	-402,756	$63,301,727	−28.5%	0.59%
FBP	First Bancorp /Pr/ Financial Services	Reduced	2,422,265	-501,473	$63,148,448	+1.1%	0.59%
CRCL	Circle Internet Group, Inc. Financial Services	Reduced	1,004,783	-543,367	$62,929,559	−57.4%	0.59%
HUBB	Hubbell Inc Industrials	Added	119,997	+94,929	$62,782,430	+410.3%	0.59%
AXSM	Axsome Therapeutics, Inc. Healthcare	Added	254,280	+51,214	$62,240,115	+81.3%	0.58%
FLEX	Flex Ltd. Technology	Added	382,135	+20,549	$61,932,619	+161.7%	0.58%
WTFC	Wintrust Financial Corp Financial Services	Reduced	384,593	-77,419	$61,811,786	−3.7%	0.58%
TDW	Tidewater Inc Energy	Reduced	894,796	-177,997	$59,620,257	−33.5%	0.56%
ATMU	Atmus Filtration Technologies Inc. Consumer Cyclical	Added	1,157,930	+415,709	$59,042,850	+40.1%	0.55%
JBL	Jabil Inc Technology	Reduced	152,187	-12,640	$58,665,044	+34.0%	0.55%
BLDR	Builders FirstSource, Inc. Industrials	Reduced	651,389	-209,105	$58,286,287	−17.7%	0.54%

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.