DOSSIER · 13F-HR · Q1 2026

CANTILLON CAPITAL MANAGEMENT LLC

CANTILLON's family office based in London, UK — $15.1B in tracked AUM across 76 positions as of Q1 2026.

C

CANTILLON·London, UK·Family Office

CIK 0001279936 · last filed Mar 31, 2026

Total AUM

$15.1B

▼ 12.2%

vs prior

Holdings

76

—

positions

Whale Score

68

68

tracked

Activity

—

no data

changes this Q

Top sector

Tech

43% weight

concentration

AI Analysis · Q1 2026 · Q1 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...

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

BROADCOM INC

$1.3B4.1M8.3%

02

ALPHABET INC

$1.1B3.7M7.1%

03

TAIWAN SEMICONDUCTOR MANUFAC

$843M2.5M5.6%

04

INTERACTIVE BROKERS GROUP IN

$754M11.2M5.0%

05

S&P GLOBAL INC

$658M1.5M4.4%

06

ANALOG DEVICES INC

$608M1.9M4.0%

07

CBRE GROUP INC

$533M3.9M3.5%

08

APPLIED MATLS INC

$520M1.5M3.5%

09

VISA INC

$519M1.7M3.5%

10

INTERCONTINENTAL EXCHANGE IN

$463M2.9M3.1%

Filing history

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