Sec Form 4 Filing - Morton Mawae @ CYANOTECH CORP - 2019-10-16

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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Morton Mawae 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 _____ Officer (give title below) X __ Other (specify below) Former CEO and Director (Last) (First) (Middle) 73-4460 QUEEN KAAHUMANU HWY #102 3. Date of Earliest Transaction (MM/DD/YY) 10/16/2019 (Street) KAILUA-KONA, HI96740 4. If Amendment, Date Original Filed (MM/DD/YY) 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)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 10/16/2019 A( 1 ) 5,700 A $ 0 22,515 D Common Stock 10/16/2019 D( 2 ) 1,610 D $ 0 20,905 D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 Stock Options $ 3.35 ( 3 ) ( 4 ) Common Stock 75,000 75,000 D Stock Options $ 3.83 ( 3 ) ( 4 ) Common Stock 45,000 45,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Morton Mawae 73-4460 QUEEN KAAHUMANU HWY #102 KAILUA-KONA, HI96740 Former CEO and Director Signatures /s/Laura L. Taylor, by Power of Attorney 10/17/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Grant of shares made pursuant to the Separation Agreement between the issuer and the reporting person, dated as of June 3, 2019 (the "Separation Agreement"), a copy of which is attached to and made a part of the issuer's Current Report on Form 8-K, filed with the Securities and Exchange Commission on June 7, 2019; transaction exempt from Section 16(b) of the Securitities Exchange Act of 1934, as amended (the "Exchange Act"), pursuant to Rule 16b-3 thereunder. ( 2 )Shares withheld pursuant to the Separation Agreement to satisfy tax withholding obligations; transaction exempt from Section 16(b) of the Exchange Act pursuant to Rule 16b-3 thereunder. ( 3 )Pursuant to Separation Agreement, all stock options are fully vested as of May 22, 2019. ( 4 )Pursuant to Separation Agreement, all stock options will expire on December 6, 2019.

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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