Ownership Submission
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, 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 *
  WADDELL & REED FINANCIAL INC
 2. Date of Event Requiring Statement (Month/Day/Year)
05/14/2014		 3. Issuer Name and Ticker or Trading Symbol
MARRONE BIO INNOVATIONS INC [MBII]
(Last)
(First)
(Middle)
6300 LAMAR AVENUE		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) __X__ Other (specify below)
1
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

OVERLAND PARK, KS 66202		 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
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 2,014,583
I
See Footnotes (1) (2) (3)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
WADDELL & REED FINANCIAL INC
6300 LAMAR AVENUE
OVERLAND PARK, KS 66202		     X   1
WADDELL & REED FINANCIAL SERVICES INC
6300 LAMAR AVENUE
OVERLAND PARK, KS 66202		     X   1
WADDELL & REED INC /KS/
6300 LAMAR AVENUE
OVERLAND PARK, KS 66202		     X   1
WADDELL & REED INVESTMENT MANAGEMENT CO
6300 LAMAR AVENUE
OVERLAND PARK, KS 66202		     X   1
IVY INVESTMENT MANAGEMENT CO
6300 LAMAR AVENUE
OVERLAND PARK, KS 66202		     X   1

Signatures

/s/ J.J.Richie, Attorney-In-Fact 02/07/2018
**Signature of Reporting Person Date
/s/ J.J.Richie, Attorney-In-Fact 02/07/2018
**Signature of Reporting Person Date
/s/ J.J.Richie, Attorney-In-Fact 02/07/2018
**Signature of Reporting Person Date
/s/ J.J.Richie, Attorney-In-Fact 02/07/2018
**Signature of Reporting Person Date
/s/ J.J.Richie, Attorney-In-Fact 02/07/2018
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) This Form 3 is being filed by Waddell & Reed Financial, Inc. ("WDR") on behalf of itself and Waddell & Reed Financial Services, Inc. ("WRFSI"), Waddell & Reed, Inc. ("WRI"), Waddell & Reed Investment Management Company ("WRIMCO"), and Ivy Investment Management Company ("IICO" and, together with WDR, WRFSI, WRI, and WRIMCO, the "Reporting Persons").
(2) The securities reported herein are beneficially owned by one or more open-end investment companies or other managed accounts which are advised or sub-advised by IICO, an investment advisory subsidiary of WDR (a publicly traded company) or WRIMCO (an investment advisory subsidiary of WRI). WRI is a broker-dealer and underwriting subsidiary of WRFSI, and WRFSI is a subsidiary of WDR. Pursuant to investment sub-advisory contracts, IICO and WRIMCO are granted investment power and, in most cases, voting power, over securities owned by sub-advisory clients. Therefore, IICO and/or WRIMCO may be deemed the beneficial owner of the securities covered by this Form 3. Indirect "beneficial ownership," if any, of any such securities is attributed to the respective parent companies solely because of the parent companies' control relationship to WRIMCO and IICO.
(3) The reported amount reflects the amount of securities that the Reporting Persons may be deemed to beneficially own immediately following the transaction requiring the filing of this Form 3. In accordance with Instruction 5(b)(iv) of Form 3, the entire amount of the Issuer's securities that the Reporting Persons may be deemed to beneficially own is reported herein. Each of WDR, WRFSI, WRI, WRIMCO, and IICO disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), beneficial ownership of such securities, except to the extent of its indirect pecuniary interest therein, and this report shall not be deemed an admission that any of the Reporting Persons is the beneficial owner of such securities for purposes of Section 16 of the Exchange Act or for any other purpose.
 
Remarks:
Exhibit List:

Exhibit 24.1 - Power of Attorney; Exhibit 24.2 - Power of Attorney; Exhibit 24.3 - Power of Attorney; Exhibit 24.4 - Power of Attorney; Exhibit 24.5 - Power of Attorney; Exhibit 99.1 - Joint Filer Information

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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