X0508 4 2024-07-12 1 0000711772 CAMBRIDGE BANCORP CATC 0001981319 Smith Jeffrey F. C/O CAMBRIDGE BANCORP 78 BLANCHARD ROAD, SUITE 400 BURLINGTON MA 01803 0 1 0 0 EVP/Head of Wealth Mgmt 0 Common Stock 2024-07-12 4 D 0 8811 D 0 D Disposed of pursuant to the Agreement and Plan of Merger dated as of September 19, 2023, by and between Cambridge Bancorp ("Cambridge"), Cambridge Trust Company, Eastern Bankshares, Inc. ("Eastern"), Eastern Bank and Citadel MS 2023, Inc., in exchange for the right to receive 43,667 Eastern restricted stock awards, with the same terms, restrictions and vesting schedules as such existing Cambridge restricted stock award. /s/ Joseph P. Sapienza, as Attorney-In Fact 2024-07-15