X0306 5 2018-12-31 0 0 1 0001403475 Bank of Marin Bancorp BMRC 0001580739 Situ Min 504 REDWOOD BOULEVARD, SUITE 100 NOVATO CA 94947 0 1 0 0 Principal Accounting Officer Common Stock 2018-11-27 4 J 0 649 0.00 A 1298 D Common Stock 2018-08-10 4 J 0 8.5443 0.00 A 2325.7194 I By ESOP Common Stock 2018-11-08 4 J 0 9.4381 0.00 A 2335.1575 I By ESOP Common Stock 2018-11-27 4 J 0 2335.1574 0.00 A 4670.3149 I By ESOP Stock Options (Right to Buy) 22.94 2024-04-01 Common Stock 100 40 D Stock Options (Right to buy) 24.825 2026-03-01 Common Stock 0 134 D Stock Options (Right to buy) 34.80 2027-03-01 Common Stock 140 280 D Stock Options (Right to buy) 33.575 2028-03-01 Common Stock 160 320 D On November 27, 2018, the common stock of Bank of Marin Bancorp split 2-for-1, resulting in the reporting person's ownership of 649 additional shares of common stock. Exempt under Rule 16A-11 Additional shares resulting from dividend reinvestments On November 27, 2018, the common stock of Bank of Marin Bancorp split 2-for-1, resulting in the reporting person's ownership of 2335.1574 additional shares of common stock. Exercisable 20% per year beginning on first anniversary date of grant This option was previously reported as covering 20 shares at an exercise price of $45.88 per share, but was adjusted to reflect the stock split that occurred on November 27, 2018. Exercisable 33% per year beginning on first anniversary date of grant This option was previously reported as covering 67 shares at an exercise price of $49.65 per share, but was adjusted to reflect the stock split that occurred on November 27, 2018. This option was previously reported as covering 140 shares at an exercise price of $69.60 per share, but was adjusted to reflect the stock split that occurred on November 27, 2018. This option was previously reported as covering 160 shares at an exercise price of $67.15 per share, but was adjusted to reflect the stock split that occurred on November 27, 2018. Nancy R. Boatright, Attorney-in-Fact 2019-01-31