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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 23rd December 2020 Long Short Number (%) Number (%) (1) Relevant securities 1,388,529 (1.077%) 2,641 (0.002%) (2) Derivatives (other than options) - - (3) Options and agreements to purchase/sell 4,000 (0.003%) - Total 1,392,529 (1.080%) 2,641 (0.002%) 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) Sale 10 209.58 Sale 10 209.66 Sale 4 209.22 Purchase 63 208.78 Purchase 30 212.54 Purchase 30 211.96 Sale 38 210.34 Purchase 35 212.12 Sale 15 208.87 Purchase 1 209.67 Purchase 30 211.70 Purchase 5 209.84 Sale 1 211.44 Sale 1 210.52 Sale 4 209.37 Sale 2 209.47 Purchase 6 210.77 Sale 1 209.70 Sale 1 209.14 Purchase 5 209.68 Sale 1 209.88 Sale 1 209.35 Sale 1 210.14 Sale 15 209.18 Sale 10 209.33 Sale 1 209.22 Sale 10 209.21 Sale 30 209.00 Sale 20 209.02 Sale 1 208.48 Sale 2 208.93 Purchase 5 210.18 Purchase 30 211.86 Sale 2 211.86 Sale 15 208.86 Sale 1 211.49 Sale 4 208.99 Sale 1 209.97 Sale 1 209.06 Purchase 3,306 208.82 Sale 1 208.83 Sale 1 209.09 Sale 25 208.95 Sale 1 209.03 Sale 15 208.73 Sale 1 208.94 Sale 1 208.88 Sale 1 208.56 Sale 15 208.69 Sale 4 208.84 Sale 2 208.85 Sale 5 208.89 Sale 4 208.57 Sale 1 208.66 Sale 1 208.72 Sale 1 209.49 Sale 1 209.12 Sale 15 208.52 Purchase 5 209.63 Sale 1 209.71 Sale 15 209.13 Sale 295 210.34 Sale 100 211.47 Sale 2 211.95 Sale 100 209.67 Sale 106 209.84 Sale 100 212.06 Sale 100 209.58 Sale 100 209.00 Sale 100 209.86 Sale 200 209.02 Sale 75 208.93 Sale 23 208.86 Sale 118 208.82 Sale 100 211.36 Sale 68 208.73 Sale 100 209.96 Sale 100 208.35 Sale 721 210.50 Sale 100 211.83 Sale 57 210.34 Sale 52 209.84 Sale 5 209.75 Sale 79 211.42 Sale 5 210.45 Sale 62 209.51 Sale 40 209.47 Sale 10 210.05 Sale 10 209.54 Sale 5 209.58 Sale 10 209.92 Sale 5 209.14 Sale 53 209.99 Sale 53 210.01 Sale 5 209.57 Sale 3 209.81 Sale 2 209.61 Sale 10 209.55 Sale 1 209.90 Sale 36 209.78 Sale 5 209.69 Purchase 71 209.18 Sale 1 209.18 Sale 34 209.31 Sale 13 209.23 Sale 5 209.20 Sale 5 209.00 Sale 3 209.17 Sale 1 209.26 Sale 5 209.02 Sale 29 208.77 Purchase 41 208.93 Sale 39 208.86 Sale 37 209.28 Sale 10 210.09 Sale 5 208.76 Sale 35 208.96 Sale 5 208.92 Sale 38 209.03 Sale 3 208.73 Sale 1 209.30 Sale 5 208.97 Sale 10 209.04 Sale 10 209.07 Sale 10 208.89 Sale 10 208.53 Sale 5 208.72 Sale 2 210.23 Sale 58 210.28 Sale 5 209.83 Purchase 94 211.52 Sale 100 208.79 Sale 100 208.87 Sale 100 209.84 Sale 100 209.75 Sale 140 209.80 Purchase 60 209.14 Sale 120 209.14 Sale 29 209.88 Sale 345 209.35 Sale 30 209.81 Sale 30 209.91 Sale 170 209.90 Sale 100 209.82 Sale 30 209.29 Sale 300 209.78 Sale 300 209.24 Sale 675 209.18 Purchase 100 209.33 Sale 336 209.33 Purchase 50 209.22 Sale 300 209.22 Sale 349 209.19 Purchase 150 209.23 Sale 200 209.23 Purchase 100 209.21 Sale 305 209.21 Purchase 100 209.25 Sale 200 209.25 Sale 102 209.20 Purchase 40 209.17 Sale 190 209.17 Sale 71 209.86 Sale 100 209.87 Sale 300 209.26 Sale 104 209.02 Purchase 23 209.34 Sale 100 209.34 Purchase 440 208.81 Sale 200 208.86 Sale 70 209.28 Sale 105 208.96 Sale 22 209.10 Sale 3,073 208.82 Purchase 100 208.83 Sale 100 208.83 Sale 100 209.09 Purchase 160 208.80 Sale 300 209.03 Sale 130 209.79 Purchase 21 208.94 Sale 100 208.94 Sale 100 208.88 Sale 100 208.56 Sale 200 208.74 Sale 100 209.30 Sale 100 208.78 Sale 100 209.04 Purchase 359 208.84 Sale 100 209.05 Sale 100 208.85 Sale 100 208.98 Purchase 100 209.15 Sale 100 208.66 Sale 4 209.32 Sale 100 208.51 Sale 100 208.71 Sale 100 208.68 Product name, e.g. call option Number of securities Exercise price per unit (Note 5) Call Option 400 (4 options with multiplier 100) 210 USD 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 24th 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