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AON · Aon plc

Everything on this page is public record — SEC Form 4 filings and congressional disclosures — alongside any INSIDER SCANNER research case for this company.

Open-market buys6
Open-market sells0
Total purchased$6,549,688
Unique insiders buying1
Most senior buyerDirector
Avg price paid$327.48
Research cases0
Last filing2026-09-02

Average price paid is weighted by shares, so a large purchase counts for more than a small one. It is what insiders reported paying, not a target or a fair value.

Insider flow: Buying only — a count of disclosed transactions, not a rating or a recommendation.

Insider transaction timeline

Every reported transaction, positioned by trade date. Purchases sit above the axis, sales below; circle area is proportional to dollar value. No share-price line is drawn — this feed carries transaction prices only, and a price history inferred from them would imply market data the filings do not contain.

Open-market purchase Open-market sale
2026-09-02 — KNIGHT LESTER B · bought 1,440 @ $329.69 2026-09-02 — KNIGHT LESTER B · bought 1,739 @ $325.63 2026-09-02 — KNIGHT LESTER B · bought 367 @ $330.51 2026-09-02 — KNIGHT LESTER B · bought 4,145 @ $328.34 2026-09-02 — KNIGHT LESTER B · bought 5,097 @ $326.53 2026-09-02 — KNIGHT LESTER B · bought 7,212 @ $327.52
2026-09-022026-09-02

Insider cost basis

Share-weighted average price across 6 reported purchases, with the full range of prices paid. Purchases only — averaging a sale into an "insider cost" would describe a price nobody paid.

$325.63 $330.51
$327.48 weighted average insider purchase price

Insider participation

One row per insider, one cell per reported transaction, shaded by value. Repeat buying and activity clustered in time are visible at a glance.

KNIGHT LESTER B Director
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The analysis built on top of these filings

The filings above are public record and stay public here. What an account adds for $AON is the reading of them — and for this company, that is what the list below says it is, no more.

  • Insider cost basisShare-weighted average price paid across the 6 reported purchases, with the full range, against the current price.
  • Insider participationWho bought, how often, and how the buying is distributed across the people filing — one person repeating is not several agreeing.
  • Transaction timelineThe [{'transaction_date': '2026-09-02', 'insider_name': 'KNIGHT LESTER B', 'insider_title': 'Director', 'transaction_type': 'Open-market buy', 'shares': 1440.0, 'price': 329.69, 'value': 474753.6, 'is_buy': True}, {'transaction_date': '2026-09-02', 'insider_name': 'KNIGHT LESTER B', 'insider_title': 'Director', 'transaction_type': 'Open-market buy', 'shares': 1739.0, 'price': 325.63, 'value': 566270.57, 'is_buy': True}, {'transaction_date': '2026-09-02', 'insider_name': 'KNIGHT LESTER B', 'insider_title': 'Director', 'transaction_type': 'Open-market buy', 'shares': 367.0, 'price': 330.51, 'value': 121297.17, 'is_buy': True}, {'transaction_date': '2026-09-02', 'insider_name': 'KNIGHT LESTER B', 'insider_title': 'Director', 'transaction_type': 'Open-market buy', 'shares': 4145.0, 'price': 328.34, 'value': 1360969.3, 'is_buy': True}, {'transaction_date': '2026-09-02', 'insider_name': 'KNIGHT LESTER B', 'insider_title': 'Director', 'transaction_type': 'Open-market buy', 'shares': 5097.0, 'price': 326.53, 'value': 1664323.41, 'is_buy': True}, {'transaction_date': '2026-09-02', 'insider_name': 'KNIGHT LESTER B', 'insider_title': 'Director', 'transaction_type': 'Open-market buy', 'shares': 7212.0, 'price': 327.52, 'value': 2362074.24, 'is_buy': True}] reported transactions plotted over the window rather than listed, so concentration is visible.

Not available for AON today: no research case — nothing here has cleared the scoring threshold. Both appear on this page on their own if that changes.

A free account opens all of it.

Not financial advice. This page reports public filings and past research output. It is not a recommendation to buy or sell, and no price target here is a prediction. Trade at your own risk.