Insiders are generally long-term investors due to restriction in making short-term profits. In contrast, wealth management institutions always have short-term investment. Wall St. Watchdog reveals information regarding the insiders and institutions which recently decreased stock shares of Aon Corporation (NYSE:AON).

SEC data indicate that these institutions significantly reduced their stock shares of Aon Corporation in Q3 2011:

• ARTISAN PARTNERS HOLDINGS LP: On 06/30/2011, held 5,047,457 shares, worth $257,420,307. On 09/30/2011, held 0 shares.
• IVORY INVESTMENT MANAGEMENT. L.P.: On 06/30/2011, held 1,844,478 shares, worth $94,068,378. On 09/30/2011, held 0 shares.
• STEVENS CAPITAL MANAGEMENT LP: On 06/30/2011, held 217,521 shares, worth $11,093,571. On 09/30/2011, held 0 shares.
• UBS OCONNOR LLC: On 06/30/2011, held 213,800 shares, worth $10,903,800. On 09/30/2011, held 0 shares.
• PARA ADVISORS LLC: On 06/30/2011, held 125,000 shares, worth $6,375,000. On 09/30/2011, held 0 shares.

About the company: Aon Corporation is an insurance services holding company. The Company is comprised of risk and insurance brokerage consulting. Aon’s services include helping manage risk for clients, negotiating and placing insurance risk with other carriers, and advicing clients related to health and benefits, retirement, compensation, strategic human capital, and human resource outsourcing.

Competitors to Watch: Arthur J. Gallagher & Co. (NYSE:AJG), Brown & Brown, Inc. (NYSE:BRO), Marsh & McLennan Companies, Inc. (NYSE:MMC), Willis Group Holdings PLC (NYSE:WSH), CNinsure Inc. (NASDAQ:CISG), Fortegra Financial Corp (NYSE:FRF), InsWeb Corporation (NASDAQ:INSW), eHealth, Inc. (NASDAQ:EHTH), and American Insurance Group (NYSE:AIG).

(Note: Data regarding Aon Corporation’s stock holdings are sourced from whalewisdom.com. All data are assumed to be accurate.)

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