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AON — Aon plc

Financials · Insurance Agents, Brokers & Service · NYSE

CIK 0000315293 · FYE 1231 · All Form 4 filings on EDGAR ↗

Formerly: AON CORP (until 2012-04-02)

1Insiders filing

6Transactions

+$6.5MReported buys

−$0Reported sells

0Cluster events

Window in data: 2026-09-02 → 2026-09-02 · Data as of 2026-09-04

Insiders

Insider	Role	Txns	Reported value
KNIGHT LESTER B	Director	6	$6.5M

Transaction history

Filing date	Trade date	Ticker	Insider	Type	Shares	Price	Value	Cluster
2026-09-03	2026-09-02	AON	KNIGHT LESTER B Director	P	1,739	$325.63	+$566k	—
2026-09-03	2026-09-02	AON	KNIGHT LESTER B Director	P	5,097	$326.53	+$1.7M	—
2026-09-03	2026-09-02	AON	KNIGHT LESTER B Director	P	7,212	$327.52	+$2.4M	—
2026-09-03	2026-09-02	AON	KNIGHT LESTER B Director	P	4,145	$328.34	+$1.4M	—
2026-09-03	2026-09-02	AON	KNIGHT LESTER B Director	P	1,440	$329.69	+$475k	—
2026-09-03	2026-09-02	AON	KNIGHT LESTER B Director	P	367	$330.51	+$121k	—

Known data limitations

Form 4 lag: insiders have 2 business days to file after a trade (weekends and holidays extend this), and this site re-ingests once daily — a transaction can appear here roughly three business days after it happened.
13F lag: quarterly 13F-HR holdings cover the prior quarter-end and are due 45 days after it — every institutional position shown here is at least 45 days old by construction, often more.
CUSIP→ticker gaps: 13F positions are reported by CUSIP; some holdings cannot be matched to a current ticker (delistings, corporate actions, thin metadata) and appear without one or are omitted from ticker-level views.
EDGAR timing variability: institutions file at different hours and days within their windows; amended filings (4/A, 13F-HR/A) can restate earlier periods, so historical aggregates may change between batches.

Insider Atlas is a descriptive research site, not investment advice — see the methodology for the full provenance chain.