2026 Q2 Portfolio Activity
In 2026 Q2, FRONTIER CAPITAL MANAGEMENT CO LLC maintained a portfolio of 324 distinct positions. The most significant new addition was DYNATRACE INC, now representing 0.67% of the total fund value. They heavily accumulated shares in APPLIED OPTOELECTRONICS INC, increasing the position by 243.2%. The fund also reduced its exposure to DARLING INGREDIENTS INC by 67.7%.
Position History
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Total Positions
324
Quarter
2026 Q2
Top Holding
FTAI (3.0%)
Top 10 Concentration
14.5%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-50 of 324
FRONTIER CAPITAL MANAGEMENT CO LLC Full Holdings List — 2026 Q2
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
FTAI
FTAI AVIATION L...
|
Industrials | 2.98% | 2.67% |
#1
Prev: #1
|
5.2 |
—
|
121,282 | 11.4% |
P
S
|
1,183,492 | $320,170,153 |
$36.44
+435.1%
|
2022 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
GVA
GRANITE CONSTR ...
|
Industrials | 1.65% | 1.46% |
#2
3
Prev: #5
|
2.7 |
—
|
-68,855 | -5.8% |
P
S
|
1,118,881 | $176,872,715 |
$42.61
+187.5%
|
2016 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
ALK
ALASKA AIR GROU...
|
Industrials | 1.65% | 1.28% |
#3
6
Prev: #9
|
2.2 |
—
|
11,056 | 0.3% |
P
S
|
3,384,643 | $176,678,385 |
$36.85
+14.8%
|
2010 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
AAOI
APPLIED OPTOELE...
|
Technology | 1.35% | 0.25% |
#4
144
Prev: #148
|
4.0 |
—
|
691,172 | 243.2% |
P
S
|
975,318 | $144,503,042 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
AKAM
AKAMAI TECHNOLO...
|
Technology | 1.25% | 1.22% |
#5
6
Prev: #11
|
3.0 |
—
|
100,004 | 9.6% |
P
S
|
1,136,573 | $134,354,286 | 2012 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ASH
ASHLAND INC
|
Basic Materials | 1.23% | 1.09% |
#6
9
Prev: #15
|
1.0 |
—
|
87,219 | 4.6% |
P
S
|
1,999,908 | $131,773,923 | 2002 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LSCC
LATTICE SEMICON...
|
Technology | 1.17% | 0.58% |
#7
38
Prev: #45
|
3.0 |
—
|
216,530 | 35.8% |
P
S
|
821,848 | $125,709,914 | 1999 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
BPOP
POPULAR INC
|
Financial Services | 1.11% | 1.10% |
#8
6
Prev: #14
|
0.9 |
—
|
-75,703 | -9.5% |
P
S
|
725,227 | $119,067,801 | 2012 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MDB
MONGODB INC
|
Technology | 1.05% | 0.54% |
#9
47
Prev: #56
|
3.4 |
—
|
119,782 | 55.9% |
P
S
|
334,098 | $112,223,606 | 2017 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
UTHR
UNITED THERAPEU...
|
Healthcare | 1.04% | 1.54% |
#10
7
Prev: #3
|
0.9 |
—
|
-45,894 | -18.2% |
P
S
|
206,808 | $112,054,808 | 2008 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
KNX
KNIGHT-SWIFT TR...
|
Industrials | 1.02% | 1.23% |
#11
1
Prev: #10
|
0.4 |
—
|
-675,589 | -32.4% |
P
S
|
1,410,955 | $109,871,061 | 2017 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
EXP
EAGLE MATLS INC
|
Basic Materials | 0.96% | 1.19% |
#12
Prev: #12
|
0.4 |
—
|
-152,033 | -24.9% |
P
S
|
458,621 | $103,189,780 | 2011 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LRN
STRIDE INC
|
Consumer Defensive | 0.96% | 1.40% |
#13
7
Prev: #6
|
0.4 |
—
|
-357,581 | -23.1% |
P
S
|
1,191,710 | $102,773,099 | 2011 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
XPO
XPO INC
|
Industrials | 0.96% | 1.30% |
#14
6
Prev: #8
|
0.4 |
—
|
-152,472 | -23.4% |
P
S
|
499,601 | $102,563,111 | 2021 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
BBIO
BRIDGEBIO PHARM...
|
Healthcare | 0.95% | 0.73% |
#15
13
Prev: #28
|
2.9 |
—
|
415,068 | 43.3% |
P
S
|
1,373,057 | $102,265,291 | 2024 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LBRT
LIBERTY ENERGY ...
|
Energy | 0.91% | 0.74% |
#16
11
Prev: #27
|
2.9 |
—
|
1,226,444 | 49.2% |
P
S
|
3,720,666 | $97,444,254 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
SANM
SANMINA CORP
|
Technology | 0.89% | 0.85% |
#17
7
Prev: #24
|
0.4 |
—
|
-259,277 | -40.7% |
P
S
|
378,111 | $95,692,357 | 1999 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
UCTT
ULTRA CLEAN HLD...
|
Technology | 0.89% | 1.14% |
#18
5
Prev: #13
|
0.4 |
—
|
-1,119,919 | -62.7% |
P
S
|
667,532 | $95,183,387 | 2018 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
RARE
ULTRAGENYX PHAR...
|
Healthcare | 0.89% | 0.47% |
#19
47
Prev: #66
|
2.9 |
—
|
656,754 | 30.0% |
P
S
|
2,847,936 | $95,092,590 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
PODD
INSULET CORP
|
Healthcare | 0.88% | 0.37% |
#20
75
Prev: #95
|
3.4 |
—
|
449,993 | 260.8% |
P
S
|
622,506 | $94,776,509 | 2007 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MOD
MODINE MFG CO
|
Consumer Cyclical | 0.86% | 0.45% |
#21
47
Prev: #68
|
3.3 |
—
|
139,829 | 68.5% |
P
S
|
343,868 | $91,819,607 | 2008 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
FLS
FLOWSERVE CORP
|
Industrials | 0.85% | 0.35% |
#22
82
Prev: #104
|
3.3 |
—
|
770,843 | 166.7% |
P
S
|
1,233,291 | $91,460,894 | 2000 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
KEX
KIRBY CORP
|
Industrials | 0.84% | 0.88% |
#23
1
Prev: #22
|
0.8 |
—
|
22,225 | 3.4% |
P
S
|
666,554 | $90,631,405 | 2000 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ALGT
ALLEGIANT TRAVE...
|
Industrials | 0.84% | 0.50% |
#24
37
Prev: #61
|
2.8 |
—
|
164,132 | 27.3% |
P
S
|
765,347 | $90,004,856 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
PSTG
EVERPURE INC
|
Technology | 0.82% | 0.57% |
#25
21
Prev: #46
|
2.3 |
—
|
175,518 | 18.6% |
P
S
|
1,120,040 | $88,247,971 | 2018 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
AMTM
AMENTUM HOLDING...
|
Industrials | 0.80% | 1.32% |
#26
19
Prev: #7
|
0.8 |
—
|
-786,239 | -15.9% |
P
S
|
4,143,971 | $85,655,891 | 2025 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
KYMR
KYMERA THERAPEU...
|
Healthcare | 0.79% | 0.65% |
#27
11
Prev: #38
|
0.8 |
—
|
-18,982 | -2.5% |
P
S
|
740,866 | $84,955,104 | 2024 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
INSM
INSMED INC
|
Healthcare | 0.79% | 0.79% |
#28
3
Prev: #25
|
3.3 |
—
|
325,681 | 69.4% |
P
S
|
795,242 | $84,788,663 | 2020 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ATI
ATI INC
|
Industrials | 0.77% | 1.04% |
#29
13
Prev: #16
|
0.3 |
—
|
-274,454 | -39.5% |
P
S
|
419,968 | $82,775,691 | 1999 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
RNST
RENASANT CORP
|
Financial Services | 0.71% | 0.63% |
#30
11
Prev: #41
|
0.8 |
—
|
76,240 | 4.5% |
P
S
|
1,778,953 | $75,676,661 | 2010 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ALAB
ASTERA LABS INC
|
Technology | 0.70% | 0.78% |
#31
5
Prev: #26
|
0.3 |
—
|
-533,612 | -77.5% |
P
S
|
154,601 | $74,675,474 | 2025 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
RCL
ROYAL CARIBBEAN...
|
Consumer Cyclical | 0.69% | 0.67% |
#32
1
Prev: #33
|
0.8 |
—
|
-4,336 | -1.8% |
P
S
|
233,963 | $74,290,271 | 1999 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
PVLA
PALVELLA THERAP...
|
Healthcare | 0.68% | 0.48% |
#33
32
Prev: #65
|
2.8 |
—
|
104,798 | 28.0% |
P
S
|
478,833 | $73,175,272 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
DT
DYNATRACE INC
|
Technology | 0.67% | — |
#34
Prev: #—
|
3.8 |
—
|
1,635,587 | — |
NEW
|
1,635,587 | $71,818,625 | 2020 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
INDI
INDIE SEMICONDU...
|
Technology | 0.67% | 0.64% |
#35
5
Prev: #40
|
0.8 |
—
|
-3,331,919 | -17.3% |
P
S
|
15,914,169 | $71,454,618 | 2023 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ADC
AGREE RLTY CORP
|
Real Estate | 0.67% | 0.85% |
#36
13
Prev: #23
|
0.8 |
—
|
-158,381 | -14.4% |
P
S
|
943,005 | $71,423,199 | 2021 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LUNR
INTUITIVE MACHI...
|
Industrials | 0.63% | 0.67% |
#37
3
Prev: #34
|
0.8 |
—
|
-340,365 | -9.7% |
P
S
|
3,173,434 | $67,879,752 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
JAZZ
JAZZ PHARMACEUT...
|
Healthcare | 0.62% | 1.01% |
#38
21
Prev: #17
|
0.2 |
—
|
-240,005 | -46.4% |
P
S
|
277,279 | $66,815,854 | 2022 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
SAIA
SAIA INC
|
Industrials | 0.59% | 0.66% |
#39
3
Prev: #36
|
0.7 |
—
|
-31,015 | -17.0% |
P
S
|
151,477 | $63,796,150 | 2006 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ENTG
ENTEGRIS INC
|
Technology | 0.59% | 0.91% |
#40
20
Prev: #20
|
0.2 |
—
|
-402,756 | -53.4% |
P
S
|
351,950 | $63,301,760 | 2019 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
FBP
FIRST BANCORP C...
|
Financial Services | 0.59% | 0.64% |
#41
2
Prev: #39
|
0.7 |
—
|
-501,473 | -17.2% |
P
S
|
2,422,265 | $63,148,454 | 2016 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
CRCL
CIRCLE INTERNET...
|
Financial Services | 0.59% | 1.52% |
#42
38
Prev: #4
|
0.2 |
—
|
-543,367 | -35.1% |
P
S
|
1,004,783 | $62,929,568 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
HUBB
HUBBELL INC
|
Industrials | 0.59% | 0.13% |
#43
171
Prev: #214
|
3.2 |
—
|
94,929 | 378.7% |
P
S
|
119,997 | $62,782,657 | 2023 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
AXSM
AXSOME THERAPEU...
|
Healthcare | 0.58% | 0.35% |
#44
55
Prev: #99
|
2.7 |
—
|
51,214 | 25.2% |
P
S
|
254,280 | $62,240,116 | 2022 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
FLEX
FLEX LTD
|
Technology | 0.58% | 0.24% |
#45
108
Prev: #153
|
2.2 |
—
|
20,549 | 5.7% |
P
S
|
382,135 | $61,932,675 | 2000 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
WTFC
WINTRUST FINL C...
|
Financial Services | 0.58% | 0.66% |
#46
11
Prev: #35
|
0.7 |
—
|
-77,419 | -16.8% |
P
S
|
384,593 | $61,811,710 | 2019 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
TDW
TIDEWATER INC N...
|
Energy | 0.56% | 0.92% |
#47
29
Prev: #18
|
0.7 |
—
|
-177,997 | -16.6% |
P
S
|
894,796 | $59,620,257 | 2012 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ATMU
ATMUS FILTRATIO...
|
Consumer Cyclical | 0.55% | 0.43% |
#48
26
Prev: #74
|
3.2 |
—
|
415,709 | 56.0% |
P
S
|
1,157,930 | $59,042,838 | 2024 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
JBL
JABIL INC
|
Technology | 0.55% | 0.45% |
#49
22
Prev: #71
|
0.7 |
—
|
-12,640 | -7.7% |
P
S
|
152,187 | $58,665,019 | 1999 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
BLDR
BUILDERS FIRSTS...
|
Industrials | 0.54% | 0.73% |
#50
21
Prev: #29
|
0.2 |
—
|
-209,105 | -24.3% |
P
S
|
651,389 | $58,286,271 | 2020 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 |
Showing 1-50 of 324 holdings