AON Aon plc Class A

together opposite · bar = ρ at each lag, −10 … 0 … +10 days · holdout ρ · click a card for the full picture

AON vs MRSH

Both indexed to 100 at 2026-05-11.

AON MRSH · range 86–132 · 2026-05-11 → 2026-11-06

Same day, ranked by what's left after the market and sector factors are removed ("beyond mkt").

MRSH Marsh

ρ +0.78beyond mkt +0.56holdout +0.79stable 100%robust

AJG Arthur J. Gallagher & Co.

ρ +0.74beyond mkt +0.51holdout +0.82stable 100%robust

BRO Brown & Brown, Inc.

ρ +0.73beyond mkt +0.45holdout +0.78stable 100%robust

WTW Willis Towers Watson Public Limited Company Ordinary Shares

ρ +0.70beyond mkt +0.45holdout +0.74stable 100%robust

KIE State Street SPDR S&P Insurance ETF

ρ +0.69beyond mkt +0.39holdout +0.68stable 100%robust

RYAN Ryan Specialty Holdings, Inc.

ρ +0.61beyond mkt +0.34holdout +0.65stable 100%robust

FORM FormFactor, Inc. FormFactor, Inc. Common Stock

ρ -0.32beyond mkt -0.05holdout -0.51stable 75%robust

Biggest shifts in same-day correlation over the last 63 trading days versus the year before.

FFIV F5, Inc. Common Stock

Δ -0.60recent -0.46prior +0.14beyond mkt +0.02

HPE Hewlett Packard Enterprise Company

Δ -0.54recent -0.57prior -0.03beyond mkt -0.00

DXPE DXP Enterprises, Inc. Common Stock

Δ -0.54recent -0.52prior +0.01beyond mkt +0.01

PRLB PROTO LABS, INC.

Δ -0.54recent -0.51prior +0.03beyond mkt -0.03

MBCE Monarch Blue Chips Elite Index ETF

Δ -0.53recent -0.44prior +0.09beyond mkt +0.08

NTAP NetApp, Inc. Common Stock

Δ -0.53recent -0.45prior +0.08beyond mkt +0.01

Strong beyond-the-market co-movement with few shared neighbours.

Symbol	beyond mkt	raw ρ	shared
MRSH Marsh	+0.56	+0.78	18
KIE State Street SPDR S&P Insurance ETF	+0.39	+0.69	13
AJG Arthur J. Gallagher & Co.	+0.51	+0.74	19
BRO Brown & Brown, Inc.	+0.45	+0.73	21
WTW Willis Towers Watson Public Limited Company Ordinary Shares	+0.45	+0.70	21