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LONDON--(BUSINESS WIRE)-- FORM 8.3 Amendment to Purchase and Sales IRISH TAKEOVER PANEL DISCLOSURE UNDER RULE 8.3 OF THE IRISH TAKEOVER PANEL ACT, 1997, TAKEOVER RULES, 2013 DEALINGS BY PERSONS WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE 1. KEY INFORMATION 2. INTERESTS AND SHORT POSITIONS (a) Interests and short positions (following dealing) in the class of relevant security dealt in (Note 3) Number (%) Number (%) (1) 382,526 0.17% 2,782,136 1.22% (2) 698,961 0.31% 34,308 0.02% (3) 0 0.00% 0 0.00% (4) 1,081,487 0.48% 2,816,444 1.23% (b) Interests and short positions in relevant securities of the company, other than the class dealt in (Note 3) Class of relevant security: Long Short Number (%) Number (%) (1) Relevant securities (2) Derivatives (other than options) (3) Options and agreements to purchase/sell Total Ap20 1. DEALINGS (Note 4) (a) Purchases and sales Number of relevant securities 7 7 10 11 22 23 45 45 47 61 66 110 146 300 309 320 563 735 1,000 1,560 2,787 2,868 2,884 2,905 3,497 3,609 3,766 4,154 4,630 6,906 7,108 7,387 7,495 10,268 15,589 15,742 21,600 21,875 22,206 23,903 32,077 38,752 95,029 115,684 1 1 1 1 1 2 2 3 3 17 23 45 100 100 100 108 110 145 190 200 254 300 300 300 300 387 399 400 414 414 429 430 484 501 638 699 700 900 941 1,301 1,424 1,661 1,797 1,900 2,068 2,868 3,152 3,656 5,143 5,899 6,194 7,288 8,993 10,866 16,000 18,873 22,169 46,726 80,229 96,370 116,257 (b) Derivatives transactions (other than options transactions) unit Long 2,868 202.3689 USD (c) Options transactions in respect of existing relevant securities (i) Writing, selling, purchasing or varying Product name, e.g. call option Writing, selling, purchasing, varying etc. Number of securities to which the option relates (Note 7) Exercise price Type, e.g. American, European etc. Expiry date Option money paid/received per unit (Note 5) (ii) Exercising Product name, e.g. call option Number of securities Exercise price per unit (Note 5) (d) Other dealings (including transactions in respect of new securities) (Note 4) Nature of transaction (Note 8) Details Price per unit (if applicable) (Note 5) Ap21 2. OTHER INFORMATION Agreements, arrangements or understandings relating to options or derivatives Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating to the voting rights of any relevant securities under any option referred to on this form or relating to the voting rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is referenced. If none, this should be stated. None 020 3134 7213

Answer: FORM 8.3 - AON PLC - AMENDMENT