Investor Presentaiton

I Stock Price Performance and Dividend Trend 125 Stock Price Performance Price Change (%) 100 75 50 25 0 -25 Dec '15 Jun '16 Dec '16 Jun'17 Dec '17 Jun '18 Dec '18 Jun '19 Dec '19 Jun '20 Dec '20 Jun' 21 Dec'21 Jun 22 NASDAQCM:CATC: 74.47 % S&P United States BMI Banks Index: 33.86 % -KBW Nasdaq Bank Index: 38.22 % $2.50 $1.96 $1.50 $0.50 2018 Declared Dividends 22 years of increased dividends (1999 – 2021) $2.04 2019 $2.38 $2.12 12% $1.92 2020 CAMBRIDGE BANCORP Source: S&P Global Market Intelligence 2022 as of June 30, 2022. 2022 Dividends includes all dividends declared through July 19, 2022. 2021 2022 25 25

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