2026 Q1 Portfolio Activity
In 2026 Q1, FRONTIER CAPITAL MANAGEMENT CO LLC maintained a portfolio of 324 distinct positions. The most significant new addition was ANTERO RESOURCES CORP, now representing 0.59% of the total fund value. They heavily accumulated shares in STRIDE INC, increasing the position by 864.1%. The fund also reduced its exposure to MONGODB INC by 29.1%.
Position History
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Total Positions
324
Quarter
2026 Q1
Top Holding
FTAI (2.7%)
Top 10 Concentration
15.3%
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 Q1
| 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 | 2.67% | 2.71% |
#1
Prev: #1
|
3.6 |
—
|
-234,369 | -18.1% |
P
S
|
1,062,210 | $260,241,381 |
$31.23
+711.3%
|
2022 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | ||
|
DAR
DARLING INGREDI...
|
Consumer Defensive | 1.56% | 1.04% |
#2
11
Prev: #13
|
2.6 |
—
|
-264,729 | -9.7% |
P
S
|
2,455,668 | $151,883,038 |
$33.88
+75.2%
|
2016 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | ||
|
UTHR
UNITED THERAPEU...
|
Healthcare | 1.54% | 0.94% |
#3
15
Prev: #18
|
4.1 |
—
|
71,525 | 39.5% |
P
S
|
252,702 | $149,847,285 |
$101.56
+459.7%
|
2008 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | ||
|
CRCL
CIRCLE INTERNET...
|
Financial Services | 1.52% | 0.95% |
#4
12
Prev: #16
|
3.6 |
—
|
418,046 | 37.0% |
P
S
|
1,548,150 | $147,709,033 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
GVA
GRANITE CONSTR ...
|
Industrials | 1.46% | 1.54% |
#5
2
Prev: #3
|
1.6 |
—
|
-70,167 | -5.6% |
P
S
|
1,187,736 | $142,385,805 | 2016 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
LRN
STRIDE INC
|
Consumer Defensive | 1.40% | 0.11% |
#6
231
Prev: #237
|
3.6 |
—
|
1,388,589 | 864.1% |
P
S
|
1,549,291 | $136,600,969 | 2011 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
AMTM
AMENTUM HOLDING...
|
Industrials | 1.32% | 1.78% |
#7
5
Prev: #2
|
1.0 |
—
|
-842,766 | -14.6% |
P
S
|
4,930,210 | $128,579,888 | 2025 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
XPO
XPO INC
|
Industrials | 1.30% | 1.04% |
#8
6
Prev: #14
|
1.0 |
—
|
-68,280 | -9.5% |
P
S
|
652,073 | $126,860,838 | 2021 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ALK
ALASKA AIR GROU...
|
Industrials | 1.28% | 1.22% |
#9
Prev: #9
|
3.0 |
—
|
1,092,815 | 47.9% |
P
S
|
3,373,587 | $124,080,520 | 2010 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
KNX
KNIGHT-SWIFT TR...
|
Industrials | 1.23% | 1.08% |
#10
2
Prev: #12
|
2.5 |
—
|
131,997 | 6.8% |
P
S
|
2,086,544 | $120,143,212 | 2017 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
AKAM
AKAMAI TECHNOLO...
|
Technology | 1.22% | 0.42% |
#11
66
Prev: #77
|
3.5 |
—
|
579,514 | 126.8% |
P
S
|
1,036,569 | $119,049,909 | 2012 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
EXP
EAGLE MATLS INC
|
Basic Materials | 1.19% | 1.20% |
#12
2
Prev: #10
|
2.5 |
—
|
65,305 | 12.0% |
P
S
|
610,654 | $115,688,414 | 2011 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
UCTT
ULTRA CLEAN HLD...
|
Technology | 1.14% | 0.94% |
#13
4
Prev: #17
|
0.5 |
—
|
-1,722,388 | -49.1% |
P
S
|
1,787,451 | $111,143,676 | 2018 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
BPOP
POPULAR INC
|
Financial Services | 1.10% | 1.26% |
#14
6
Prev: #8
|
0.9 |
—
|
-153,300 | -16.1% |
P
S
|
800,930 | $107,460,810 | 2012 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ASH
ASHLAND INC
|
Basic Materials | 1.09% | 0.89% |
#15
7
Prev: #22
|
2.9 |
—
|
487,400 | 34.2% |
P
S
|
1,912,689 | $106,364,617 | 2002 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ATI
ATI INC
|
Industrials | 1.04% | 1.49% |
#16
12
Prev: #4
|
0.4 |
—
|
-533,031 | -43.4% |
P
S
|
694,422 | $101,010,604 | 1999 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
JAZZ
JAZZ PHARMACEUT...
|
Healthcare | 1.01% | 0.33% |
#17
93
Prev: #110
|
3.4 |
—
|
335,083 | 183.9% |
P
S
|
517,284 | $97,792,587 | 2022 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
TDW
TIDEWATER INC N...
|
Energy | 0.92% | 0.51% |
#18
39
Prev: #57
|
2.4 |
—
|
124,056 | 13.1% |
P
S
|
1,072,793 | $89,631,855 | 2012 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
APGE
APOGEE THERAPEU...
|
Healthcare | 0.92% | 0.38% |
#19
67
Prev: #86
|
3.4 |
—
|
584,030 | 121.6% |
P
S
|
1,064,483 | $89,597,516 | 2024 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ENTG
ENTEGRIS INC
|
Technology | 0.91% | 0.94% |
#20
1
Prev: #19
|
0.4 |
—
|
-292,792 | -28.0% |
P
S
|
754,706 | $88,481,754 | 2019 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
MPWR
MONOLITHIC PWR ...
|
Technology | 0.90% | 0.81% |
#21
2
Prev: #23
|
0.9 |
—
|
-4,419 | -5.3% |
P
S
|
79,699 | $87,138,539 | 2004 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
KEX
KIRBY CORP
|
Industrials | 0.88% | 0.16% |
#22
179
Prev: #201
|
3.4 |
—
|
511,397 | 384.7% |
P
S
|
644,329 | $85,618,420 | 2000 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ADC
AGREE RLTY CORP
|
Real Estate | 0.85% | 0.62% |
#23
14
Prev: #37
|
2.8 |
—
|
295,154 | 36.6% |
P
S
|
1,101,386 | $83,022,477 | 2021 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
SANM
SANMINA CORP
|
Technology | 0.85% | 1.02% |
#24
9
Prev: #15
|
0.8 |
—
|
-1,353 | -0.2% |
P
S
|
637,388 | $82,630,924 | 1999 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
INSM
INSMED INC
|
Healthcare | 0.79% | 0.53% |
#25
30
Prev: #55
|
3.3 |
—
|
184,717 | 64.8% |
P
S
|
469,561 | $76,782,611 | 2020 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ALAB
ASTERA LABS INC
|
Technology | 0.78% | 1.30% |
#26
20
Prev: #6
|
0.8 |
—
|
-47,128 | -6.4% |
P
S
|
688,213 | $75,428,174 | 2025 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
LBRT
LIBERTY ENERGY ...
|
Energy | 0.74% | 0.04% |
#27
249
Prev: #276
|
3.3 |
—
|
2,313,093 | 1277.0% |
P
S
|
2,494,222 | $71,833,608 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
BBIO
BRIDGEBIO PHARM...
|
Healthcare | 0.73% | 0.67% |
#28
2
Prev: #30
|
2.3 |
—
|
131,858 | 16.0% |
P
S
|
957,989 | $71,140,263 | 2024 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
BLDR
BUILDERS FIRSTS...
|
Industrials | 0.73% | 0.63% |
#29
5
Prev: #34
|
2.8 |
—
|
284,322 | 49.3% |
P
S
|
860,494 | $70,844,490 | 2020 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
BURL
BURLINGTON STOR...
|
Consumer Cyclical | 0.72% | 0.60% |
#30
10
Prev: #40
|
2.3 |
—
|
19,805 | 10.1% |
P
S
|
216,537 | $70,456,809 | 2016 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
PRDO
PERDOCEO ED COR...
|
Consumer Defensive | 0.71% | 0.60% |
#31
11
Prev: #42
|
0.8 |
—
|
-65,495 | -3.4% |
P
S
|
1,846,986 | $68,726,338 | 2020 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
WFRD
WEATHERFORD INT...
|
Energy | 0.71% | 0.59% |
#32
11
Prev: #43
|
0.8 |
—
|
10,956 | 1.5% |
P
S
|
725,497 | $68,617,486 | 2023 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
RCL
ROYAL CARIBBEAN...
|
Consumer Cyclical | 0.67% | 0.64% |
#33
Prev: #33
|
2.3 |
—
|
22,449 | 10.4% |
P
S
|
238,299 | $65,575,119 | 1999 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
LUNR
INTUITIVE MACHI...
|
Industrials | 0.67% | 0.46% |
#34
37
Prev: #71
|
2.8 |
—
|
844,720 | 31.6% |
P
S
|
3,513,799 | $65,216,109 | 2025 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
WTFC
WINTRUST FINL C...
|
Financial Services | 0.66% | 0.81% |
#35
11
Prev: #24
|
0.8 |
—
|
-81,036 | -14.9% |
P
S
|
462,012 | $64,191,994 | 2019 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
SAIA
SAIA INC
|
Industrials | 0.66% | 0.64% |
#36
4
Prev: #32
|
0.8 |
—
|
-2,226 | -1.2% |
P
S
|
182,492 | $64,105,753 | 2006 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
SILA
SILA REALTY TRU...
|
Real Estate | 0.66% | 0.57% |
#37
13
Prev: #50
|
2.3 |
—
|
412,327 | 18.0% |
P
S
|
2,696,692 | $63,857,674 | 2024 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
KYMR
KYMERA THERAPEU...
|
Healthcare | 0.65% | 0.53% |
#38
18
Prev: #56
|
2.3 |
—
|
123,891 | 19.5% |
P
S
|
759,848 | $63,287,740 | 2024 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
FBP
FIRST BANCORP C...
|
Financial Services | 0.64% | 0.67% |
#39
8
Prev: #31
|
0.8 |
—
|
-124,533 | -4.1% |
P
S
|
2,923,738 | $62,451,034 | 2016 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
INDI
INDIE SEMICONDU...
|
Technology | 0.64% | 0.71% |
#40
11
Prev: #29
|
0.8 |
—
|
402,594 | 2.1% |
P
S
|
19,246,088 | $61,972,404 | 2023 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
RNST
RENASANT CORP
|
Financial Services | 0.63% | 0.75% |
#41
13
Prev: #28
|
0.8 |
—
|
-305,819 | -15.2% |
P
S
|
1,702,713 | $61,519,021 | 2010 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
NTRA
NATERA INC
|
Healthcare | 0.61% | 1.27% |
#42
35
Prev: #7
|
0.2 |
—
|
-227,403 | -43.6% |
P
S
|
294,347 | $58,866,433 | 2019 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
AR
ANTERO RESOURCE...
|
Energy | 0.59% | — |
#43
Prev: #—
|
3.7 |
—
|
1,349,237 | — |
NEW
|
1,349,237 | $57,261,618 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ELAN
ELANCO ANIMAL H...
|
Healthcare | 0.58% | 0.62% |
#44
8
Prev: #36
|
0.7 |
—
|
-213,976 | -8.3% |
P
S
|
2,362,526 | $56,535,237 | 2023 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
LSCC
LATTICE SEMICON...
|
Technology | 0.58% | 0.76% |
#45
18
Prev: #27
|
0.2 |
—
|
-373,321 | -38.1% |
P
S
|
605,318 | $56,149,310 | 1999 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
PSTG
EVERPURE INC
|
Technology | 0.57% | 0.63% |
#46
11
Prev: #35
|
2.2 |
—
|
63,597 | 7.2% |
P
S
|
944,522 | $55,764,556 | 2018 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
EBC
EASTERN BANKSHA...
|
Financial Services | 0.57% | 0.58% |
#47
1
Prev: #46
|
0.7 |
—
|
-121,450 | -4.1% |
P
S
|
2,840,293 | $55,556,122 | 2024 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
SIGI
SELECTIVE INS G...
|
Financial Services | 0.57% | 0.55% |
#48
4
Prev: #52
|
2.2 |
—
|
114,530 | 18.6% |
P
S
|
729,748 | $55,015,677 | 2001 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
FR
FIRST INDL RLTY...
|
Real Estate | 0.56% | 0.61% |
#49
10
Prev: #39
|
0.7 |
—
|
-51,892 | -5.2% |
P
S
|
946,365 | $54,747,215 | 2023 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
TER
TERADYNE INC
|
Technology | 0.56% | 1.17% |
#50
39
Prev: #11
|
0.2 |
—
|
-388,036 | -67.9% |
P
S
|
183,204 | $54,312,729 | 1999 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 |
Showing 1-50 of 324 holdings