13F Insight
DOSSIER · 13F-HR · Q2 2026

CANTILLON CAPITAL MANAGEMENT LLC

$665M in tracked AUM across 27 positions as of Q2 2026.

CC
CIK 0001279936 · last filed Jun 30, 2026
Total AUM
$665M
as of Q2 2026
Holdings
27
—
positions
Whale Score
71
71
strong
Activity
—
no data
changes this Q
AI Analysis · Q2 2026
Comprehensive Analysis of CANTILLON CAPITAL MANAGEMENT LLC (SEC 13F)
1. Portfolio Overview

Cantillon Capital Management LLC reported a significant contraction in portfolio value for the quarter ended September 30, 2025. The total assets under management (AUM) decreased by 25.1%, dropping from $17.30 billion to $12.95 billion. This reduction is not solely attributable to market performance but is largely the result of a substantial shift in strategy involving the liquidation of...

The portfolio is highly concentrated, with the top 10 positions accounting for approximately 61.66% of the total portfolio value. The top 25 positions listed represent the entirety of the 50-holding portfolio, indicating a focused investment approach. The firm appears to be pivoting away from a broader diversification model toward a more concentrated selection of high-conviction names, specifically within the Technology and Financial Services sectors.

2. Key Holdings
Analysis generated by 13F Insight from SEC Form 13F filing data · Q2 2026. Methodology

Quarter at a glance — Q2 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q2 2026.

#HoldingValueSharesWeight
01
AVGO
BROADCOM INC
$71M187K10.6%02
GOOGL
ALPHABET INC
$61M171K9.2%03
TSM
TAIWAN SEMICONDUCTOR MANUFAC
$55M115K8.2%04
IBKR
INTERACTIVE BROKERS GROUP IN
$45M518K6.8%05
AMAT
APPLIED MATLS INC
$36M50K5.5%06
ADI
ANALOG DEVICES INC
$35M88K5.3%07
SPGI
S&P GLOBAL INC
$29M71K4.4%08
V
VISA INC
$29M84K4.3%09
MSFT
MICROSOFT CORP
$26M69K3.9%10
CBRE
CBRE GROUP INC
$24M181K3.7%

Filing history

2026Q2Jun 30
$665M▼ 95.6%
27 positionsView →2026Q1Mar 31
$15.1B▼ 18.6%
76 positionsView →2025Q4Dec 31
$18.5B▲ 1.8%
74 positionsView →2025Q3Sep 30
$18.2B▲ 5.0%
76 positionsView →2025Q2Jun 30
$17.3B▲ 12.0%
75 positionsLocked2025Q1Mar 31
$15.4B▼ 6.7%
74 positionsLocked2024Q4Dec 31
$16.5B▲ 1.2%
72 positionsLocked2024Q3Sep 30
$16.4B▲ 9.3%
76 positionsLocked2024Q2Jun 30
$15.0B▼ 5.9%
78 positionsLocked2024Q1Mar 31
$15.9B▲ 6.2%
74 positionsLocked2023Q4Dec 31
$15.0B▲ 11.0%
74 positionsLocked2023Q3Sep 30
$13.5B▼ 5.8%
78 positionsLocked
Showing 12 of 86