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LONDON--(BUSINESS WIRE)-- Ap19 FORM 8.3 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 Name of person dealing (Note 1) Millennium International Management LP Company dealt in Willis Towers Watson plc Class of relevant security to which the dealings being disclosed relate (Note 2) IE00BDB6Q211 Date of dealing 9th December 2020 Long Short Number (%) Number (%) (1) Relevant securities 1,407,476 (1.092%) 1,809 (0.001%) (2) Derivatives (other than options) - - (3) Options and agreements to purchase/sell 3,400 (0.003%) - Total 1,410,876 (1.095%) 1,809 (0.001%) 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 Purchase/sale Number of relevant securities Price per unit (Note 5) (USD) Purchase 43 207.57 Sale 23 211.41 Purchase 54 207.57 Sale 55 211.28 Sale 36 207.94 Sale 42 211.31 Sale 27 207.76 Sale 39 207.87 Sale 46 207.85 Sale 86 210.08 Sale 260 211.21 Sale 152 207.67 Sale 38 211.30 Sale 21 207.66 Sale 3 207.89 Sale 253 208.58 Sale 20 207.71 Purchase 680 207.57 Sale 4 207.57 Sale 58 208.00 Sale 146 207.83 Sale 71 208.65 Sale 98 208.20 Sale 20 207.18 Sale 56 208.10 Sale 128 208.43 Sale 14 207.24 Sale 122 207.92 Sale 51 208.32 Sale 77 208.14 Sale 54 208.73 Sale 42 206.39 Sale 67 206.67 Sale 261 208.55 Sale 58 208.72 Sale 46 208.86 Sale 6 208.94 Sale 167 208.21 Sale 1,166 208.13 Sale 56 209.04 Sale 100 208.09 Sale 18 208.03 Sale 90 207.30 Sale 85 207.75 Sale 40 207.70 Sale 65 207.61 Sale 537 208.40 Sale 15 207.69 Sale 13 207.35 Sale 16 207.62 Sale 63 207.55 Sale 10 208.63 Sale 22 207.53 Sale 66 207.72 Sale 43 207.16 Sale 61 208.27 Sale 50 207.44 Sale 36 207.37 Sale 51 207.31 Sale 27 207.79 Sale 2 207.36 Sale 16 207.48 Sale 6 210.38 Sale 116 211.41 Purchase 22 208.49 Purchase 20 208.01 Purchase 37 207.94 Purchase 4 209.11 Purchase 27 208.54 Purchase 6 208.66 Purchase 4 207.76 Purchase 8 207.97 Purchase 15 208.39 Purchase 2 208.51 Purchase 28 208.28 Purchase 41 208.70 Purchase 8 208.91 Purchase 8 207.78 Purchase 7 207.90 Purchase 2 209.40 Purchase 7 209.03 Purchase 16 208.92 Purchase 6 209.05 Purchase 10 208.80 Purchase 19 208.12 Purchase 4 207.87 Purchase 16 207.85 Purchase 42 208.34 Purchase 22 208.44 Purchase 2 208.89 Purchase 13 207.64 Purchase 9 207.67 Purchase 4 206.75 Purchase 2 208.97 Purchase 4 209.07 Purchase 40 208.48 Purchase 7 208.19 Purchase 4 208.68 Purchase 8 208.93 Purchase 4 208.85 Purchase 2 208.82 Purchase 3 206.62 Purchase 3 206.21 Purchase 3 206.19 Purchase 26 207.80 Purchase 3 207.66 Purchase 29 207.89 Purchase 12 208.60 Purchase 27 208.58 Purchase 26 208.11 Purchase 15 207.71 Purchase 3 208.46 Purchase 3 206.12 Purchase 6 206.61 Purchase 6 206.31 Purchase 192 207.57 Purchase 3 206.33 Purchase 6 206.57 Purchase 78 208.00 Purchase 44 207.88 Purchase 3 207.83 Purchase 32 208.50 Purchase 11 206.77 Purchase 12 208.65 Purchase 3 208.20 Purchase 13 207.84 Purchase 12 207.86 Purchase 6 209.33 Purchase 3 206.28 Purchase 6 206.51 Purchase 9 206.66 Purchase 7 206.63 Purchase 8 207.82 Purchase 6 207.73 Purchase 4 208.83 Purchase 1 206.18 Purchase 3 206.36 Purchase 6 206.13 Purchase 3 206.55 Purchase 1 206.42 Purchase 9 206.34 Purchase 4 207.18 Purchase 6 206.27 Purchase 1 206.24 Purchase 33 207.99 Purchase 6 207.38 Purchase 7 206.69 Purchase 4 206.72 Purchase 4 206.73 Purchase 4 207.23 Purchase 19 207.54 Purchase 16 207.95 Purchase 14 208.30 Purchase 18 208.10 Purchase 5 208.42 Purchase 3 207.10 Purchase 18 208.43 Purchase 21 208.76 Purchase 6 206.47 Purchase 3 206.32 Purchase 3 206.23 Purchase 33 208.18 Purchase 18 208.59 Purchase 7 208.57 Purchase 23 208.52 Purchase 6 206.29 Purchase 9 206.58 Purchase 4 206.65 Purchase 4 207.04 Purchase 4 207.14 Purchase 4 208.23 Purchase 2 208.16 Purchase 19 208.33 Purchase 4 206.74 Purchase 2 207.25 Purchase 18 207.56 Purchase 3 207.92 Purchase 1 208.31 Purchase 5 208.32 Purchase 9 208.22 Purchase 2 208.87 Purchase 9 208.56 Purchase 43 208.14 Purchase 1 209.10 Purchase 2 209.00 Purchase 1 208.67 Purchase 4 207.17 Purchase 6 206.43 Purchase 2 209.20 Purchase 5 208.38 Purchase 2 208.64 Purchase 10 208.71 Purchase 3 206.26 Purchase 7 207.81 Purchase 38 208.53 Purchase 4 208.73 Purchase 16 208.78 Purchase 3 209.28 Purchase 1 209.21 Purchase 12 207.07 Purchase 2 209.02 Purchase 3 207.93 Purchase 3 207.02 Purchase 3 206.39 Purchase 8 208.81 Purchase 13 208.75 Purchase 3 206.30 Purchase 1 209.23 Purchase 11 208.55 Purchase 32 208.72 Purchase 9 208.61 Purchase 20 208.86 Purchase 2 208.96 Purchase 2 209.16 Purchase 3 206.40 Purchase 5 208.94 Purchase 1 209.39 Purchase 13 208.21 Purchase 1 208.26 Purchase 1 209.27 Purchase 15 208.13 Purchase 2 209.22 Purchase 2 209.19 Purchase 1 209.04 Purchase 3 209.09 Purchase 8 208.95 Purchase 14 208.74 Purchase 6 208.88 Purchase 19 208.08 Purchase 2 208.69 Purchase 4 206.78 Purchase 24 208.05 Purchase 44 208.06 Purchase 26 208.02 Purchase 11 207.96 Purchase 15 207.91 Purchase 16 208.09 Purchase 24 208.03 Purchase 9 207.30 Purchase 9 207.32 Purchase 2 208.77 Purchase 7 207.20 Purchase 9 207.12 Purchase 14 207.70 Purchase 16 207.61 Purchase 30 208.40 Purchase 21 207.69 Purchase 7 207.58 Purchase 9 207.35 Purchase 7 207.45 Purchase 24 208.04 Purchase 7 207.52 Purchase 7 207.62 Purchase 7 207.68 Purchase 7 208.79 Purchase 7 207.74 Purchase 4 208.25 Purchase 15 207.41 Purchase 9 207.50 Purchase 25 207.55 Purchase 15 208.36 Purchase 4 207.60 Purchase 1 208.15 Purchase 12 208.45 Purchase 1 208.47 Purchase 7 207.59 Purchase 7 207.53 Purchase 1 209.25 Purchase 8 207.16 Purchase 10 207.63 Purchase 2 208.90 Purchase 7 207.65 Purchase 3 206.56 Purchase 4 207.06 Purchase 4 207.05 Purchase 1 208.84 Purchase 15 207.98 Purchase 9 207.28 Purchase 16 208.49 Sale 1 208.49 Purchase 33 207.94 Sale 1 208.54 Sale 1 208.28 Purchase 100 207.90 Sale 1 207.85 Sale 1 207.64 Sale 1 206.75 Sale 1 208.68 Purchase 19 207.66 Sale 1 208.60 Purchase 177 207.57 Sale 49 207.57 Sale 102 208.00 Sale 1 207.88 Sale 2 207.83 Sale 1 206.18 Sale 1 206.42 Sale 1 206.24 Sale 1 206.69 Purchase 104 207.95 Sale 1 208.10 Sale 1 206.59 Sale 1 208.76 Sale 1 207.24 Sale 1 208.59 Sale 1 208.57 Sale 1 207.14 Sale 1 208.33 Sale 1 207.92 Sale 1 208.22 Sale 1 208.87 Sale 105 209.00 Sale 102 208.67 Sale 1 208.38 Sale 114 208.64 Sale 1 208.99 Purchase 69 207.81 Sale 1 208.73 Sale 1 208.78 Purchase 40 207.93 Sale 1 208.81 Sale 1 208.75 Sale 1 208.72 Sale 1 208.62 Purchase 16 206.85 Sale 1 209.09 Sale 1 208.08 Sale 2 208.06 Purchase 8 207.96 Sale 1 208.09 Sale 1 207.75 Sale 1 208.40 Sale 1 208.79 Purchase 175 207.77 Purchase 1 207.50 Sale 1 208.47 Product name, e.g. call option Number of securities Exercise price per unit (Note 5) 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. Is a Supplemental Form 8 attached? (Note 9) NO Date of disclosure 10th December 2020 Contact name Milos Naumovic Telephone number +44 203 650 8203 If a connected EFM, name of offeree/offeror with which connected If a connected EFM, state nature of connection (Note 10)

Answer: Form 8.3 - Willis Towers Watson plc