Several other hedge funds and other institutional investors have also bought and sold shares of the company. Massachusetts Financial Services Co. MA raised its holdings in AON by 0.9% in the third quarter. Massachusetts Financial Services Co. MA now owns 21,442,730 shares of the financial services provider’s stock valued at $3,297,462,000 after acquiring an additional 191,770 shares in the last quarter. Mawer Investment Management Ltd. raised its holdings in AON by 2.9% in the second quarter. Mawer Investment Management Ltd. now owns 5,522,249 shares of the financial services provider’s stock valued at $757,487,000 after acquiring an additional 154,272 shares in the last quarter. Iridian Asset Management LLC CT raised its holdings in AON by…