Question 1

How many shares of AON does DIAMOND HILL CAPITAL MANAGEMENT INC own?

Accepted Answer

As of 2026-Q1, DIAMOND HILL CAPITAL MANAGEMENT INC holds 1.5M shares of AON (AON PLC).

Question 2

What is DIAMOND HILL CAPITAL MANAGEMENT INC's AON position worth?

Accepted Answer

As of 2026-Q1, DIAMOND HILL CAPITAL MANAGEMENT INC's AON position is worth $480.3M.

Question 3

Is DIAMOND HILL CAPITAL MANAGEMENT INC buying or selling AON?

Accepted Answer

In 2026-Q1, DIAMOND HILL CAPITAL MANAGEMENT INC decreased their AON position (-6.8% change in shares).

Question 4

When did DIAMOND HILL CAPITAL MANAGEMENT INC first buy AON?

Accepted Answer

Based on available 13F filings, DIAMOND HILL CAPITAL MANAGEMENT INC first reported a position in AON in 2026-Q1. They have held the position across 7 quarters.