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 *
  MITSUI & CO LTD
 2. Date of Event Requiring Statement (Month/Day/Year)
05/09/2013		 3. Issuer Name and Ticker or Trading Symbol
BioAmber Inc. [BIOAU]
(Last)
(First)
(Middle)
2-1, OHTEMACHI 1-CHOME, CHIYODA-KU, 		 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 Original Filed(Month/Day/Year)
(Street)

TOKYO, M0 100-0004		 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 793,625
D
 
Common Stock 499,940
I
MCVP Technology Fund I, LLC (1)

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
Warrants (right to buy) 04/15/2011 04/15/2021 Common Stock 15,750 $ 10.547 I MCVP Technology Fund I, LLC (1)

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
MITSUI & CO LTD
2-1, OHTEMACHI 1-CHOME, CHIYODA-KU
TOKYO, M0 100-0004		     X    
MCVP TECHNOLOGY FUND I, LLC
C/O MITSUI & CO. GLOBAL INVESTMENT, INC.
200 PARK AVENUE
NEW YORK, NY 10166		     X    

Signatures

MITSUI & CO., LTD. By: /s/ Wataru Ebata Name: Wataru Ebata Title: General Manager, Principal Investment Division 05/09/2013
**Signature of Reporting Person Date
MCVP TECHNOLOGY FUND I, LLC, by Mitsui & Co. Global Investment, Inc., its manager By: /s/ Kenichi Kimura Name: Kenichi Kimura Title: President & CEO 05/09/2013
**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) The reported securities are owned directly by MCVP Technology Fund I, LLC. Mitsui & Co., Ltd., MCVP Holding, Inc. and Mitsui & Co. Venture Partners, III LLC may be deemed to beneficially own the reported securities but disclaim beneficial ownership of such securities except to the extent of their pecuniary interests therein.

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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