DOSSIER · 13F-HR · Q1 2026

FRONTIER CAPITAL MANAGEMENT CO LLC

FRONTIER's pension fund based in Greenwich, CT $9.7B in tracked AUM across 291 positions as of Q1 2026.

F
FRONTIER·Greenwich, CT·Pension Fund
CIK 0000351173 · last filed Mar 31, 2026
Total AUM
$9.7B
1.5%
vs prior
Holdings
291
positions
Whale Score
55
55
tracked
Activity
no data
changes this Q
Top sector
Financials
7% weight
concentration
AI Analysis · Q1 2026 · Q1 2026
Comprehensive Analysis of SEC 13F Filing: Frontier Capital Management Co LLC
1. Portfolio Overview

Frontier Capital Management Co LLC reported a significant contraction in portfolio value for the quarter ended September 30, 2025. The total assets under management (AUM) decreased by 42.4%, dropping from $10.80 billion to $6.23 billion. This substantial reduction is likely driven by a combination of realized losses from asset liquidations, market depreciation, and active capital return to i...

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
G3730V105
FTAI AVIATION LTD
$260M1.1M2.7%
02
DAR
DARLING INGREDIENTS INC
$152M2.5M1.6%
03
UTHR
UNITED THERAPEUTICS CORP DEL
$150M253K1.5%
04
CRCL
CIRCLE INTERNET GROUP INC
$148M1.5M1.5%
05
GVA
GRANITE CONSTR INC
$142M1.2M1.5%
06
LRN
STRIDE INC
$137M1.5M1.4%
07
AMTM
AMENTUM HOLDINGS INC
$129M4.9M1.3%
08
XPO
XPO INC
$127M652K1.3%
09
ALK
ALASKA AIR GROUP INC
$124M3.4M1.3%
10
KNX
KNIGHT-SWIFT TRANSN HLDGS IN
$120M2.1M1.2%

Filing history

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