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
OMB APPROVAL
OMB Number: 3235-0287
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
STROMMEN JACK B.
   2. Issuer Name and Ticker or Trading Symbol
BIOLARGO, INC. [BLGO] 		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)
7108 31ST AVENUE NORTH		 3. Date of Earliest Transaction (Month/Day/Year)
03/28/2018
(Street)

MINNEAPOLIS, MN 55427		 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

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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. SEC 1474 (9-02)

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
Convertible Promissory Note $ 0.3 03/28/2018   P   $ 100,000   03/28/2018 04/20/2021(1) Common stock 333,333 $ 100,000 (2) $ 100,000 I Securities held by Sanatio Capital, LLC.
Warrant to Purchase Common Stock $ 0.48 03/28/2018   P   333,333   03/28/2018 04/20/2023 Common stock 333,333 (3) 3,590,476 (4) I Securities held by Sanatio Capital, LLC.

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
STROMMEN JACK B.
7108 31ST AVENUE NORTH
MINNEAPOLIS, MN 55427		   X      

Signatures

 /s/ John R. Browning, Attorney in fact   03/30/2018
**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).
(1) The maturity date of the Convertible Promissory Note is April 20, 2021.
(2) Represents the amount of cash investment and the principal amount due on the Convertible Promissory Note reported herein.
(3) The reported Warrant to Purchase Common Stock was received as part of a unit associated with a $100,000 investment by Reporting Person into Issuer's private securities offering, along with the Convertible Promissory Note reported herein. No separate consideration was given for the warrant.
(4) Includes warrants to purchase 3,257,143 common stock held by Reporting Person directly. Does not include 82,138 shares of Issuer's common stock purchasable by Reporting Person pursuant to Options.
 
Remarks:
The Convertible Promissory Note and Warrant reported in Table II were purchased as part of a unit in the issuer's private securities offering titled Spring 2018 Offering.

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

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.