Lester B Knight, Director at Aon plc, bought 20,000 shares of AON on 2 September 2026 — $6,549,688 of their own company’s stock at $327.48 a share.

That price is the entry above, and it is a real one: a Form 4 discloses the price actually paid, so this is what they paid — the average across the separate lines of the filing — rather than an estimate. It is what they paid on their own trade date, and it is not a price available now.

Filed 3 September 2026. This post is dated when that filing reached us, because that is the first moment anyone here could have acted on it.

One person buying a lot is the whole signal here. Grants, option exercises, tax withholdings and scheduled 10b5-1 plan purchases are excluded, because none of them is somebody choosing to put money in today; so are purchases by holders who are neither officers nor directors, which are funds building a position rather than a person making a decision. An automated tracker of public SEC filings, not a recommendation.