FRONTIER CAPITAL MANAGEMENT CO LLC

CIK

351173

Location

Boston, MA

Portfolio Value

Mid $9,703,092,702

Diversification

Diversified

Filing Date

Global Rank

#423 / 8,621 ▲ 24 · as of Mar 2026

Top Industry

Biotechnology 7.4%

3Y Alpha vs SPY

+0.2%

Period ended 4 months ago

Filed May 15, 2026 · 2mo

25 quarters · since Mar 2020

Clone Performance

Jul 2023–Jul 2026 · vs SPY

Hypothetical growth of buying every stock this filer reported holding, rebalancing on each filing and indexed to the same start. Option positions cannot be bought this way and are left out.

Cloned portfolio

+67.9%

SPY

+67.9%

Annualised alpha

+0.0%

Max drawdown

−29.6%

Estimate. 13F holdings are quarter-lagged, so the clone rebalances about 45 days after each period end — when the filing becomes public — and it excludes option and short positions. It tracks 100% of reported value on average across 13 quarters. 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	23.0%	$2,231,296,573	53
Technology	19.4%	$1,878,939,984	61
Healthcare	15.9%	$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	5.2%	$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./TX	+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 · $9,703,092,702 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
FTAI	FTAI Aviation Ltd. Industrials	Reduced	1,062,210	-234,369	$260,241,450	+2.0%	2.68%
DAR	Darling Ingredients Inc. Consumer Defensive	Reduced	2,455,668	-264,729	$151,883,065	+55.1%	1.57%
UTHR	UNITED THERAPEUTICS Corp Healthcare	Added	252,702	+71,525	$149,847,231	+69.7%	1.54%
CRCL	Circle Internet Group, Inc. Financial Services	Added	1,548,150	+418,046	$147,708,991	+64.8%	1.52%
GVA	Granite Construction Inc Industrials	Reduced	1,187,736	-70,167	$142,385,791	−1.9%	1.47%
LRN	Stride, Inc. Consumer Defensive	Added	1,549,291	+1,388,589	$136,600,987	+1209.1%	1.41%
AMTM	Amentum Holdings, Inc. Industrials	Reduced	4,930,210	-842,766	$128,579,876	−23.2%	1.33%
XPO	XPO, Inc. Industrials	Reduced	652,073	-68,280	$126,860,802	+29.6%	1.31%
ALK	Alaska Air Group, Inc. Industrials	Added	3,373,587	+1,092,815	$124,080,529	+8.2%	1.28%
KNX	Knight-Swift Transportation Holdings Inc. Industrials	Added	2,086,544	+131,997	$120,143,203	+17.6%	1.24%
AKAM	Akamai Technologies Inc Technology	Added	1,036,569	+579,514	$119,049,949	+198.5%	1.23%
EXP	Eagle Materials Inc Basic Materials	Added	610,654	+65,305	$115,688,400	+2.6%	1.19%
UCTT	Ultra Clean Holdings, Inc. Technology	Reduced	1,787,451	-5,232,227	$111,143,703	−37.5%	1.15%
BPOP	Popular, Inc. Financial Services	Reduced	800,930	-153,300	$107,460,778	−9.6%	1.11%
ASH	Ashland Inc. Basic Materials	Added	1,912,689	+487,400	$106,364,635	+27.2%	1.10%
ATI	Ati Inc Industrials	Reduced	694,422	-533,031	$101,010,624	−28.3%	1.04%
JAZZ	Jazz Pharmaceuticals plc Healthcare	Added	517,284	+335,083	$97,792,540	+215.7%	1.01%
TDW	Tidewater Inc Energy	Added	1,072,793	+124,056	$89,631,855	+87.0%	0.92%
APGE	Apogee Therapeutics, Inc. Healthcare	Added	1,064,483	+584,030	$89,597,534	+147.1%	0.92%
ENTG	Entegris Inc Technology	Reduced	754,706	-292,792	$88,481,731	+0.3%	0.91%
MPWR	Monolithic Power Systems, Inc. Technology	Reduced	79,699	-4,419	$87,138,901	+14.3%	0.90%
KEX	Kirby Corp Industrials	Added	644,329	+511,397	$85,618,437	+484.6%	0.88%
ADC	Agree Realty Corp Real Estate	Added	1,101,386	+295,154	$83,022,476	+43.0%	0.86%
SANM	Sanmina Corp Technology	Reduced	637,388	-1,353	$82,630,980	−13.8%	0.85%
INSM	INSMED Inc Healthcare	Added	469,561	+184,717	$76,782,614	+54.9%	0.79%
ALAB	Astera Labs, Inc. Technology	Reduced	688,213	-47,128	$75,428,144	−38.3%	0.78%
LBRT	Liberty Energy Inc. Energy	Added	2,494,222	+2,313,093	$71,833,593	+2048.4%	0.74%
BBIO	BridgeBio Pharma, Inc. Healthcare	Added	957,989	+131,858	$71,140,263	+12.6%	0.73%
BLDR	Builders FirstSource, Inc. Industrials	Added	860,494	+284,322	$70,844,471	+19.5%	0.73%
BURL	Burlington Stores, Inc. Consumer Cyclical	Added	216,537	+19,805	$70,456,809	+24.0%	0.73%
PRDO	PERDOCEO EDUCATION Corp Consumer Defensive	Reduced	1,846,986	-65,495	$68,726,349	+22.5%	0.71%
WFRD	Weatherford International plc Energy	Added	725,497	+10,956	$68,617,506	+22.7%	0.71%
RCL	Royal Caribbean Cruises Ltd Consumer Cyclical	Added	238,299	+22,449	$65,575,118	+8.9%	0.68%
LUNR	Intuitive Machines, Inc. Industrials	Added	3,513,799	+844,720	$65,216,109	+50.5%	0.67%
WTFC	Wintrust Financial Corp Financial Services	Reduced	462,012	-81,036	$64,191,947	−15.5%	0.66%
SAIA	Saia Inc Industrials	Reduced	182,492	-2,226	$64,105,789	+6.3%	0.66%
SILA	Sila Realty Trust, Inc. Real Estate	Added	2,696,692	+412,327	$63,857,666	+19.9%	0.66%
KYMR	Kymera Therapeutics, Inc. Healthcare	Added	759,848	+123,891	$63,287,739	+27.9%	0.65%
FBP	First Bancorp /Pr/ Financial Services	Reduced	2,923,738	-124,533	$62,451,043	−1.2%	0.64%
INDI	indie Semiconductor, Inc. Technology	Added	19,246,088	+402,594	$61,972,403	−6.8%	0.64%
RNST	Renasant Corp Financial Services	Reduced	1,702,713	-305,819	$61,519,020	−13.0%	0.63%
NTRA	Natera, Inc. Healthcare	Reduced	294,347	-227,403	$58,866,456	−50.8%	0.61%
AR	ANTERO RESOURCES Corp Energy	NEW	1,349,237	NEW	$57,261,618	NEW	0.59%
ELAN	Elanco Animal Health Inc Healthcare	Reduced	2,362,526	-213,976	$56,535,247	−3.0%	0.58%
LSCC	Lattice Semiconductor Corp Technology	Reduced	605,318	-373,321	$56,149,297	−22.0%	0.58%
P	Everpure, Inc. Technology	Added	944,522	+63,597	$55,764,578	−5.5%	0.57%
EBC	Eastern Bankshares, Inc. Financial Services	Reduced	2,840,293	-121,450	$55,556,131	+1.8%	0.57%
SIGI	Selective Insurance Group Inc Financial Services	Added	729,748	+114,530	$55,015,701	+6.9%	0.57%
FR	First Industrial Realty Trust Inc Real Estate	Reduced	946,365	-51,892	$54,747,215	−4.2%	0.56%
TER	Teradyne, Inc Technology	Reduced	183,204	-388,036	$54,312,657	−50.9%	0.56%