Statement of Changes in Beneficial Ownership (4)

FORM 4

[X] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * Anderson Nicolas C	2. Issuer Name and Ticker or Trading Symbol AMERICAN RIVER BANKSHARES [ AMRB ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director                    _____ 10% Owner _____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle) 3100 ZINFANDEL DRIVE, STE. 450	3. Date of Earliest Transaction (MM/DD/YYYY) 8/6/2021
(Street) RANCHO CORDOVA, CA 95670 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	8/6/2021	8/6/2021	D		7461	D	(1)(2)(3)	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		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 of Derivative Security: 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

Explanation of Responses:
(1)	On August 6, 2021, pursuant to the Agreement and Plan of Merger ("Merger Agreement"), dated as of April 16, 2021 by and between Bank of Marin Bancorp ("BMRC") and American River Bankshares ("AMRB"), AMRB merged with and into BMRC ("Merger"), and each outstanding AMRB common share was converted into the right to receive 0.575 of a share of BMRC common stock, with cash payable in lieu of a fractional share in an amount equal to the fraction of a share of BMRC common stock which the holder would otherwise be entitled to receive multiplied by $33.59. In connection with the Merger, the reporting person has the right to receive, in exchange for all of the AMRB common shares reported in Table I, an aggregate of 4,290 shares of BMRC common stock and $2.69 in cash, with cash payable in lieu of a fractional share of BMRC common stock, subject to any required tax withholding under applicable law. [Contd. in FN2]
(2)	[Continued from FN1] On August 6, 2021, the effective date of the Merger, the closing price of BMRC common stock was $36.15 per share.
(3)	Amount of securities disposed of, pursuant to the Merger Agreement, includes AMRB restricted shares. At the effective time of the Merger, any vesting conditions applicable to outstanding restricted share awards under AMRB's equity incentive plans automatically accelerated in full and such restricted shares converted into, and will be exchanged for, the merger consideration as described in note (1) above, less any applicable taxes required to be withheld with respect to such vesting.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Anderson Nicolas C 3100 ZINFANDEL DRIVE, STE. 450 RANCHO CORDOVA, CA 95670	X

Signatures
/s/ Nicolas C. Anderson		8/9/2021
**Signature of Reporting Person		Date