Aon plc stock holds near its yearly low as Citigroup sets a USD 435 target

Aon plc stock (ISIN IE00BLP1HW54) closed at USD 295.76 on the New York Stock Exchange on September 18, 2026, down 0.10 percent from the prior session. The price stood only USD 2.76 above the 52-week low of USD 293.00 and USD 86.58 below the 52-week high of USD 382.34, putting the current market position closer to the bottom of its annual range than to the top.

Citigroup keeps USD 435 target

The clearest recent stock-specific catalyst came from Citigroup. According to MarketBeat on September 21, 2026, the bank reaffirmed its Buy rating and set a USD 435 price target.

That target is USD 139.24 above the September 18 close, a difference of 47.08 percent according to the same dated report. The article also records a Moderate Buy consensus based on 12 Buy ratings, six Holds and one Sell, with an average target of USD 397.47.

Valuation and range tell two stories

MarketBeat reported a market capitalization of USD 62.74 billion and a price-earnings ratio of 16.30 on September 21, 2026. The combination of a valuation multiple below 20 and a share price near the annual low creates a clear split between the stock's trading position and the more constructive analyst consensus.

A separate September 21, 2026 assessment from GuruFocus placed the stock at USD 295.64 and its GF Value at USD 392.17, describing a 24.6 percent gap between the quoted price and that model value. This is a model-based valuation comparison, not a company forecast or a guarantee of future performance.

Stock remains near annual low

The September 18 close of USD 295.76 remains the reference market figure for this article because it is the latest completed trading session explicitly dated in the available price report. The 0.10 percent daily decline, the USD 62.74 billion market capitalization and the USD 293.00 to USD 382.34 52-week range frame the stock's current technical position without mixing currencies or exchanges.

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