SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response: 0.5

1. Name and Address of Reporting Person* ARDSLEY ADVISORY PARTNERS (Last) (First) (Middle) 262 HARBOR DRIVE (Street) STAMFORD CT 06902 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 04/28/2017	3. Issuer Name and Ticker or Trading Symbol MARRONE BIO INNOVATIONS INC [ MBII ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	3,681,580	I	See Footnotes(1)(2)(3)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* ARDSLEY ADVISORY PARTNERS (Last) (First) (Middle) 262 HARBOR DRIVE (Street) STAMFORD CT 06902 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ARDSLEY PARTNERS I (Last) (First) (Middle) 262 HARBOR DRIVE (Street) STAMFORD CT 06902 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* HEMPLEMAN PHILIP J (Last) (First) (Middle) 262 HARBOR DRIVE (Street) STAMFORD CT 06902 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Ardsley Partners Renewable Energy Fund, L.P. (Last) (First) (Middle) 262 HARBOR DRIVE (Street) STAMFORD CT 06902 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Ardsley Partners Fund II, L.P. (Last) (First) (Middle) 262 HARBOR DRIVE (Street) STAMFORD CT 06902 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Ardsley Duckdive Fund, L.P. (Last) (First) (Middle) 262 HARBOR DRIVE (Street) STAMFORD CT 06902 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Ardsley Partners Institutional Fund, L.P. (Last) (First) (Middle) 262 HARBOR DRIVE (Street) STAMFORD CT 06902 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Ardsley Partners Advanced Healthcare Fund, L.P. (Last) (First) (Middle) 262 HARBOR DRIVE (Street) STAMFORD CT 06902 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. This Form 3 is being filed by Ardsley Advisory Partners (the " Advisor") on behalf of itself and Ardsley Partners I (the "General Partner"), Ardsley Partners Renewable Energy Fund, L.P. (the "Renewable Energy Fund"). Ardsley Partners Fund II, L.P. (the "Fund II"), Ardsley Duckdive Fund, L.P. (the "Duckdive Fund"), Ardsley Partners Institutional Fund, L.P. (the "Institutional Fund"), Ardsley Partners Advanced Healthcare Fund, L.P. (the "Healthcare Fund") and Philip J. Hempleman ("Hempleman" and, together with the Advisor, the General Partner, the Renewable Energy Fund, the Fund II, the Duckdive Fund, the Institutional Fund and the Healthcare Fund, the "Reporting Persons"). The General Partner serves as general partner to the Renewable Energy Fund, the Fund II, the Institutional Fund and the Healthcare Fund. Hempleman is the Managing Partner of the Advisor and the General Partner and serves as the general partner to the Duckdive Fund.

2. This amount reflects the amount of securities held by the Reporting Persons immediately following the transaction requiring the filing of this statement. In accordance with Instruction 5(b)(iv) of Form 3, the entire amount of the Issuer's securities held by Reporting Persons is reported herein. Each of the General Partner, the Advisor and Hempleman, disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his/its indirect pecuniary interest therein, and this report shall not be deemed an admission that either the General Partner and the Advisor are the beneficial owner of such securities for purposes of Section 16 or for any other purposes.

3. Cont'd from Footnote 2: Hempleman is the Managing Partner of the General Partner and the Advisor and serves as the general partner to the Duckdive Fund and disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his/its indirect pecuniary interest therein, and this report shall not be deemed an admission that Hempleman is the beneficial owner of such securities for purposes of Section 16 or for any other purposes.

	/s/ Steve Napoli, Partner of Ardsley Advisory Partners	05/05/2017
	** Signature of Reporting Person	Date
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 5 (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 Number.