Compare
Aon plc vs Marsh McLennan
Aon plc (AON) and Marsh McLennan (MRSH) side by side, from official filings: what insiders, members of Congress and funds reported. These are counts of what was filed, not a view on either stock.
| Aon plc AONNYSE · Insurance Brokers | Marsh McLennan MRSHNYSE · Insurance Brokers | |
|---|---|---|
| Insider records, last 12 months | 134 | 150 |
| Congress trades, last 12 months | 1 | 5 |
| Fund positions reported, last 12 months | 138 | 198 |
| Federal contract awards, last 12 months | 0 | 0 |
| Open-market purchases by insiders since 2006 | 45 | 26 |
| Open-market sales by insiders since 2006 | 1,875 | 279 |
| Last open-market purchase by an insider | Sep 4, 2026 | Jul 31, 2025 |
| Next results | Oct 29, 2026 | Oct 15, 2026 |
Counts of records OQRO holds, by their date. Insider history since 2006 comes from the SEC's insider transactions data sets and every filing since. Planned and automatic sales are included in the sales.
Common questions
Which has had more insider buying, Aon plc or Marsh McLennan?
Since 2006, Aon plc insiders reported 45 open-market purchases against 26 for Marsh McLennan, in SEC Forms 4 and 5. Counts depend on the number of insiders and how long each company has been listed.
Do members of Congress trade AON or MRSH?
In the last 12 months, members of Congress disclosed 1 trades in Aon plc (AON) and 5 in Marsh McLennan (MRSH), each reported as a value range on a periodic transaction report.
When did insiders last buy AON and MRSH?
Aon plc: Sep 4, 2026. Marsh McLennan: Jul 31, 2025. Dates are those of the SEC filings.
See the record behind any of these
Each company page opens free with one real filing and the counts of the last 12 months. OQRO Pro adds the full history of every insider and company since 2006, the screener, alerts, Congress trades and fund moves.
Aon plc pageMarsh McLennan pageRare insider trades this weekAll comparisons
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