FORM 4
☐ 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 *

Nordin Amy Beth		 2. Issuer Name and Ticker or Trading Symbol

CYANOTECH CORP [ CYAN ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
VP, HR, Secretary
(Last)          (First)          (Middle)

CYANOTECH CORPORATION, 73-4460 QUEEN KAAHUMANU HWY #102		 3. Date of Earliest Transaction (MM/DD/YYYY)

4/6/2023
(Street)

KAILUA-KONA, HI 96740		 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
(City)        (State)        (Zip)
Rule 10b5-1(c) Transaction Indication
☐ Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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 4/6/2023  M(1)  34 A$0 1586 D  
Common Stock 4/6/2023  F(2)  13 D$0.94 1573 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 Security3. Trans. Date3A. Deemed Execution Date, if any4. 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 Date7. 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units  (3)4/6/2023  A   100     (4) (4)Common Stock 100 $0 5042 D  
Restricted Stock Units  (3)4/6/2023  M     34   (5) (5)Common Stock 34 $0 5008 D  
Explanation of Responses:
(1) Represents the conversion upon vesting of restricted stock units into common stock.
(2) No stock was sold. On April 6, 2023, in connection with the vesting of 34 shares of stock, the Company withheld a total of 13 shares to satisfy a payroll tax liability incident to such vesting.
(3) Each restricted stock unit represents the contingent right to receive one (1) share of Cyanotech Common Stock.
(4) The restricted stock units vest as to 34 shares on April 6, 2023; 1,501 shares at July 29, 2023; 403 shares at July 30, 2023; 33 shares on April 6, 2024; 1,502 shares on July 29, 2024; 33 shares on April 6, 2025; 1,502 shares on July 29, 2025; and 34 shares on April 6, 2026, in each case subject to the reporting person's continued service with the Company on the vesting date.
(5) The restricted stock units vest as to 1,501 shares at July 29, 2023; 403 shares at July 30, 2023; 33 shares on April 6, 2024; 1,502 shares on July 29, 2024; 33 shares on April 6, 2025; 1,502 shares on July 29, 2025; and 34 shares on April 6, 2026, in each case subject to the reporting person's continued service with the Company on the vesting date.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Nordin Amy Beth
CYANOTECH CORPORATION
73-4460 QUEEN KAAHUMANU HWY #102
KAILUA-KONA, HI 96740

VP, HR, Secretary
Signatures
/s/Laura L. Taylor, by Power of Attorney4/10/2023
**Signature of Reporting PersonDate
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).
Note:File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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