Investor Presentaiton

| Wealth Management & Noninterest Income Listed as the 18th Largest Independent Investment Advisers in Massachusetts by the Boston Business Journal in 2022 Client Wealth Assets ($M) Net Client Flows ($M) 2018 2019 2020 2021 $4,853 $4,168 $4,016 Starting AUM YTD 2022 $2,971 $2,760 $3,287 $3.994 $4.656 $3,453 Acquired AUM* 339 $2,877 Net Flows (176) (69) 90 (166) Net Market (35) 532 437 572 (645) Impact Ending AUM $2,760 $3,287 $3,994 $4,656 $3,845 Custody Assets 117 165 174 197 171 2018 2019 2020 2021 2022 Total WM Assets $2,877 $3,453 $4,168 $4,853 $4,016 Wealth Management Revenue ($M) $35.0 $29.8 $26.5 $25.2 Noninterest Income ($M) NII was 25% of Revenue in 2022 $44.3 $39.5 $36.4 $33.0 $16.7 0.81% 0.84% 0.81% AUM AUM AUM Fee Fee Fee 0.79% AUM Fee 0.78% AUM Fee 2018 2019 2020 2021 YTD 2022 $22.5 2018 2019 2020 2021 YTD 2022 Wealth Management All Other CAMBRIDGE BANCORP *Acquired in our merger with Wellesley Bancorp, Inc. AUM is comprised of approximately 61% equities, 26% fixed income, and 13% cash/other as of June 30, 2022. AUM Fee represents the weighted average fee on Assets Under Management during the period. 10

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