FRONTIER CAPITAL MANAGEMENT CO LLC
Q4 2025 Form 13-F

BOSTON, MASSACHUSETTS
CIK 0000351173 · CRD 106274 · SEC-registered investment adviser
$9.4B Reported Value Total

FRONTIER CAPITAL MANAGEMENT CO LLC reports 55 total accounts under management (AUM). There are 55 discretionary accounts valued at $9,597,310,562, and 0 non-discretionary accounts.

Source: Form ADV filed * Note that certain holdings are exempt from Form 13-F reporting, so the AUM totals may be greater than the Form 13-F total.
SEC Registered Discretionary Manager
Firm Brochure (Part 2A)
Private funds (Form ADV)
7 funds · $451.8M gross asset value
Other: $451.8M
Source: Form ADV filed 2026-09-01
Reported value
$9.4B
Quarter over quarter
+3.4%
Holdings
295
Top-10 concentration
15.1%

Filing Structure

Reports holdings for

Holdings reported by

Key People

Form ADV owners & control persons
Jillian Patricia Berggren
CONTROLLER
Sarah Jean Jankowski
CHIEF OPERATING OFFICER/MANAGING PARTNER
Robert E Phay
CHIEF COMPLIANCE OFFICER AND GENERAL COUNSEL
Q3 2025
Q1 2026
Go to latest

Coverage begins with the second quarter of 2013. Earlier quarters are not shown while their accuracy is being verified.

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Q4 2025 13F filing summary

Period of report December 31, 2025
Filed February 17, 2026
Form 13F-HR
Reported value $9.4B
Positions 295
Change in reported value -15.5%
New positions 25
Exited positions 27
Position turnover 16.2%
Top-10 concentration 15.1%

13F filings by quarter

Quarter Positions Value
Q2 2026 13F
Filed Aug 14, 2026
 300 $10.7B
Q1 2026 13F
Filed May 15, 2026
 291 $9.7B
Q4 2025 13F
Filed Feb 17, 2026
 295 $9.4B
Q3 2025 13F
Filed Nov 14, 2025
 297 $11.2B
Q2 2025 13F
Filed Aug 14, 2025
 294 $10.8B
Q1 2025 13F
Filed May 15, 2025
 283 $9.1B
Q4 2024 13F
Filed Feb 14, 2025
 285 $10.5B
Q3 2024 13F
Filed Nov 14, 2024
 281 $10.6B
Q2 2024 13F
Filed Aug 14, 2024
 279 $10.1B
Q1 2024 13F
Filed May 15, 2024
 269 $10.7B
Q4 2023 13F
Filed Feb 14, 2024
 263 $9.9B
Q3 2023 13F
Filed Nov 14, 2023
 267 $9.1B
Q2 2023 13F
Filed Aug 14, 2023
 261 $10.4B
Q1 2023 13F
Filed May 15, 2023
 257 $9.7B
Q4 2022 13F
Filed Feb 14, 2023
 262 $9.2B
Q3 2022 13F
Filed Nov 14, 2022
 268 $8.5B
Q2 2022 13F
Filed Jul 20, 2022
 274 $8.7B
Q1 2022 13F
Filed Apr 14, 2022
 267 $11.0B
Q4 2021 13F
Filed Jan 19, 2022
 274 $12.7B
Q3 2021 13F
Filed Oct 19, 2021
 280 $12.7B

33 earlier quarters on file — choose one from the quarter menu above.

Top 20 holdings · Q4 2025

# Holding Reported value % of portfolio
1 FTAI FTAI AVIATION LTD $255.2M 2.71%
2 AMTM AMENTUM HOLDINGS INC $167.4M 1.78%
3 GVA GRANITE CONSTR INC $145.1M 1.54%
4 ATI ATI INC $140.9M 1.49%
5 MDB MONGODB INC $126.8M 1.35%
6 ALAB ASTERA LABS INC $122.3M 1.3%
7 NTRA NATERA INC $119.5M 1.27%
8 BPOP POPULAR INC $118.8M 1.26%
9 ALK ALASKA AIR GROUP INC $114.7M 1.22%
10 EXP EAGLE MATLS INC $112.7M 1.2%
11 TER TERADYNE INC $110.6M 1.17%
12 KNX KNIGHT-SWIFT TRANSN HLDGS IN $102.2M 1.08%
13 DAR DARLING INGREDIENTS INC $97.9M 1.04%
14 XPO XPO INC $97.9M 1.04%
15 SANM SANMINA CORPORATION $95.9M 1.02%
16 CRCL CIRCLE INTERNET GROUP INC $89.6M 0.95%
17 UCTT ULTRA CLEAN HLDGS INC $88.9M 0.94%
18 UTHR UNITED THERAPEUTICS CORP DEL $88.3M 0.94%
19 ENTG ENTEGRIS INC $88.3M 0.94%
20 MKSI MKS INC. $88.0M 0.93%

Values as reported on the Q4 2025 Form 13F. Every position is in the holdings table below.

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