Ownership Submission
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

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
DAVIS MICHAEL A /
  2. Issuer Name and Ticker or Trading Symbol
CYANOTECH CORP [CYAN]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
CYANOTECH CORPORATION, 73-4460 QUEEN KAAHUMANU HWY #102
3. Date of Earliest Transaction (Month/Day/Year)
11/30/2018
(Street)

KAILUA-KONA, HI 96740
4. If Amendment, Date Original Filed(Month/Day/Year)
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 (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
Cyanotech Corporation Common Stock 11/30/2018   A   3,488 A $ 3.5908 313,569 I By self as director of Skywords Family Foundation Inc.(1)
Cyanotech Corporation Common Stock 12/03/2018   A   618 A $ 3.6131 314,187 I By self as director of Skywords Family Foundation Inc.(1)
Cyanotech Corporation Common Stock               12,119 D  
Cyanotech Corporation Common Stock               31,250 I By Spouse
Cyanotech Corporation Common Stock               150,000 I By Self as co-trustee for trusts for the benefit of Mr. Davis's children
Cyanotech Corporation Common Stock               450,225 I By self as trustee of the Michael Arlen Davis Revocable Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
DAVIS MICHAEL A /
CYANOTECH CORPORATION
73-4460 QUEEN KAAHUMANU HWY #102
KAILUA-KONA, HI 96740
  X   X    

Signatures

 /s/ Dan Sprague, by Power of Attorney   12/03/2018
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
 
Remarks:
(1) Skywords is a 501(c)(3) charitable foundation, of which the Reporting Person and his spouse serve as the two directors.  The Reporting Person should not be deemed to be a beneficial owner of the shares held by Skywords under Rule 16a-2, however, the shares held by Skywords are included here for purposes of complete disclosure and in light of such shares having been previously disclosed on previous Forms 4 filed by the Reporting Person.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

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