SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
	Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person* Colombo Russell A (Last) (First) (Middle) 504 REDWOOD BLVD., SUITE 100 (Street) NOVATO CALIFORNIA 94947 (City) (State) (Zip) UNITED STATES (Country)	2. Issuer Name and Ticker or Trading Symbol Bank of Marin Bancorp [ BMRC ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)
	2a. Foreign Trading Symbol
	3. Date of Earliest Transaction (Month/Day/Year) 04/01/2024	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person
	4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock								43,560	I	As Trustee of Colombo Family Trust
Common Stock								2,551	D
Common Stock								13,692	I	By IRA

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options (Right to Buy)	$22.94	04/01/2024		H(1)			8,400	04/01/2019(2)	04/01/2024	Common Stock	8,400	$0	0	D
Stock Options (Right to Buy)	$25.38	03/02/2025		H(3)			14,340	03/02/2018(4)	03/02/2025	Common Stock	14,340	$0	0	D
Stock Options (Right to Buy)	$24.83	03/01/2026		H(5)			14,820	03/01/2019(4)	03/01/2026	Common Stock	14,820	$0	0	D
Stock Options (Right to Buy)	$34.8							(4)	03/01/2027	Common Stock	10,360		10,360	D
Stock Options (Right to Buy)	$33.58							(6)	03/01/2028	Common Stock	5,420		5,420	D
Stock Options (Right to Buy)	$33.58							(4)	03/01/2028	Common Stock	11,540		11,540	D
Stock Options (Right to Buy)	$44.45							(4)	03/01/2029	Common Stock	10,030		10,030	D
Stock Options (Right to Buy)	$40.1							(4)	03/02/2030	Common Stock	7,430		7,430	D
Stock Options (Right to Buy)	$38.25							(4)	03/01/2031	Common Stock	4,723		4,723	D

Explanation of Responses:

1. The stock option was granted on April 1, 2014 and vested in equal annual installments over five years, becoming fully exercisable on April 1, 2019. The option expired unexercised on April 1, 2024. This Form 4 is being filed late due to an administrative oversight.

2. Exercisable 20% per year beginning on first anniversary date of grant.

3. The stock option was granted on March 2, 2015 and vested in equal annual installments over three years, becoming fully exercisable on March 2, 2018. The option expired unexercised on March 2, 2025. This Form 4 is being filed late due to an administrative oversight.

4. Exercisable 33% per year beginning on first anniversary date of grant.

5. The stock option was granted on March 1, 2016 and vested in equal annual installments over three years, becoming fully exercisable on March 1, 2019. The option expired unexercised on March 1, 2026. This Form 4 is being filed late due to an administrative oversight.

6. Exercisable 33% per year beginning on first anniversary date of grant.

	/s/ Krissy Meyer, Attorney-in-Fact	05/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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* Form 4: SEC 1474 (03-26)