Jan Kalff, Director at AON CORP (AOC), sold 4,000 shares at $40.85 ($163K) on 2010-05-07, disclosed to the SEC on 2010-05-10.
Open-market sale of $163k AOC by Director. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Nothing distinguishes this filing.