Core Insights - Aon plc is a leading global professional services firm specializing in risk, retirement, and health solutions, operating in over 120 countries with significant competition from Marsh & McLennan Companies and Willis Towers Watson [1] Stock Performance and Analyst Ratings - Citigroup upgraded Aon's stock to a "Buy" rating on February 3, 2026, raising the price target from $402 to $412, indicating confidence in Aon's growth potential despite a slight stock decrease of 0.86% [2][6] - Aon's stock price fluctuated between $348.25 and $358.04, currently priced at $349.61, with a market capitalization of approximately $75.14 billion [4][6] Institutional Investor Activity - Principal Financial Group Inc. reduced its holdings in Aon by 1.8%, selling 4,701 shares, leaving them with 256,631 shares valued at about $91.5 million [3] - Flaharty Asset Management LLC acquired a new position in Aon valued at $274,000, while Mutual Advisors LLC increased its stake by 292.4%, indicating growing interest from institutional investors [3][6] Trading Volume and Market Interest - Today's trading volume for Aon is 1,074,129 shares, reflecting active investor interest and market attention following the recent upgrade by Citigroup [5][6]