LYTIR

Company · AON

Aon plc

Nasdaq's symbol directory lists AON on the New York Stock Exchange as “Aon plc Class A Ordinary Shares (Ireland)”.

In the 12 months to Nov 8, 2026: insiders bought on 1 occasion ($6.5M); insiders sold on 3 occasions ($1.7M); 3 planned-sale notices; 2 filings by holders of 5% or more; 1 congressional trade disclosure; 8 company reports (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider purchases and sales, by month (last 12 months)Insider purchases: $6.5M in total; Insider sales: $1.7M in total.Jul: Insider sales $1.7MSep: Insider purchases $6.5MDecJanFebMarAprMayJunJulAugSepOctNov
Insider purchases above the line: $6.5MInsider sales below: $1.7M
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. KNIGHT LESTER B bought on 1 day latest Sep 2, 2026 bought $6.5M
  2. Zeidel Darren, General Counsel sold on 3 days all under a 10b5-1 plan latest Jul 28, 2026 sold $1.7M
Every trade (4)
  1. BUYKNIGHT LESTER B bought Sep 2, 2026 20,000 shares 6 legs combined filing $6.5M
  2. SELLZeidel Darren, General Counsel sold Jul 28, 2026 1,900 shares 3 legs combined 10b5-1 plan (scheduled) filing $718K
  3. SELLZeidel Darren, General Counsel sold Jul 17, 2026 1,950 shares 3 legs combined 10b5-1 plan (scheduled) filing $726K
  4. SELLZeidel Darren, General Counsel sold Jul 7, 2026 600 shares 10b5-1 plan (scheduled) filing $216K

Planned sales · SEC Form 144

Notice given

A Form 144 is filed before an insider sells restricted stock. It states an intent; the sale, if it happens, appears later on a Form 4. Every recent notice

  1. Zeidel Darren filed Jul 28, 2026 Officer 1,900 shares planned sale date 07/28/2026 filing $718K
  2. Zeidel Darren filed Jul 17, 2026 Officer 1,950 shares planned sale date 07/17/2026 filing $726K
  3. Zeidel Darren filed Jul 7, 2026 Officer 600 shares planned sale date 07/07/2026 filing $216K

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. JPMORGAN CHASE & CO. filed Oct 16, 2026 Schedule 13G/A passive 14,312,078 shares filing 6.7%
  2. JPMORGAN CHASE & CO filed Jul 16, 2026 Schedule 13G passive 12,173,339 shares filing 5.6%

Congress · STOCK Act

The Althing

Periodic transaction reports. Amounts are the ranges members report; the trade date is when it happened, the report can come up to 45 days later.

  1. Alan Armstrong (R-OK): Purchase Mar 27, 2026 reported Jul 21, 2026 one of 703 trades the member reported that day Senate Stock $1,001 - $15,000

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Results of operations and financial condition filing Oct 28, 2026
  2. Entry into a material definitive agreement; Termination of a material definitive agreement; Creation of a direct financial obligation filing Sep 22, 2026
  3. Other events filing Sep 17, 2026
  4. Other events filing Sep 11, 2026
  5. Entry into a material definitive agreement; Regulation FD disclosure filing Aug 31, 2026
  6. Departure or appointment of directors or officers filing Aug 17, 2026
  7. Results of operations and financial condition filing Jul 29, 2026
  8. Departure or appointment of directors or officers; Submission of matters to a vote of security holders; Other events filing Jul 1, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.