As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 4/10/24  Hartmann Charles Jason            4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 4/10/24  Johansen Jennifer M.              4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 4/10/24  Nordin Amy Beth                   4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 4/10/24  Jensen Glenn                      4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 4/10/24  Ladin Felicia I                   4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 4/10/24  Custer Matthew Keith              4          Dir.,Off.²  1:7K   Cyanotech Corp.                   RDG Filings/FA           
 4/10/24  Cysewski Gerald R                 4          Other²      1:7K   Cyanotech Corp.                   RDG Filings/FA           
  4/9/24  Nasdaq Stock Market LLC           25-NSE©                2:4K   Cyanotech Corp.                                            
 2/27/24  Jensen Glenn                      4          Officer²    1:5K   Cyanotech Corp.                   RDG Filings/FA           
 2/21/24  Ladin Felicia I                   4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 2/21/24  Cysewski Gerald R                 4          Other²      1:7K   Cyanotech Corp.                   RDG Filings/FA           
 2/21/24  Jensen Glenn                      4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 2/21/24  Johansen Jennifer M.              4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 2/21/24  Kakuk Collette Nicole             4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 2/21/24  Hartmann Charles Jason            4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 2/21/24  Nordin Amy Beth                   4          Officer²    1:7K   Cyanotech Corp.                   RDG Filings/FA           
 2/14/24  Cyanotech Corp.                   8-K:3        2/8/24   11:159K                                   RDG Filings/FA           
  2/8/24  Cyanotech Corp.                   10-Q       12/31/23   69:5.4M                                   RDG Filings/FA           
12/20/23  Davis Michael A                   SC 13D/A               1:88K  Cyanotech Corp.                   Shartsis Friese LLP      
12/19/23  Davis Michael A                   4          Dir.,%Own.² 1:6K   Cyanotech Corp.                   RDG Filings/FA           

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¹	Filing/Form Types:  /A
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	8-K	Current Report — Form 8-K { Item 1: Business & Operations;  2: Financial Info;  3: Securities & Trading;  4: Accountants & Accounting;  5: Governance & Management;  6: Asset-Backed Securities;  7: Disclosures;  8: Events;  9: Financials }.
	10-Q	Quarterly Report — Form 10-Q.
	25-NSE	Notice by a Securities Exchange of the Removal from Listing and Registration of Matured, Redeemed or Retired Securities — Form 25.
	SC 13D	Statement of Acquisition of Beneficial Ownership by an “Active” Investor — Schedule 13D.
	/A	Amendment to, or Amended version of, a previous Filing of this Type.
	©	This Filing was a Confirming copy.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.