Form 4 METABOLIX, INC. For: Apr 01 Filed by: HAASER CHARLES B

April 3, 2015 3:35 PM EDT

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person ^*

HAASER CHARLES B

(Last)

(First)

(Middle)

C/O METABOLIX, INC.

21 ERIE STREET

(Street)

CAMBRIDGE

02139

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
METABOLIX, INC. [ MBLX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
Chief Accounting Officer

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2015

4. If Amendment, Date of 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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	04/01/2015		A		37,698	A	$ 0 ⁽¹⁾ ⁽²⁾	38,698	D
Common Stock	04/01/2015		A		170,000	A	$ 0 ⁽¹⁾ ⁽³⁾	208,698	D
Common Stock								10,030	I	By 401(k) Plan ⁽⁴⁾

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 Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The securities awarded are in the form of restricted stock units ("RSUs") issued pursuant to the Issuer's 2014 Stock Option and Incentive Plan. Each RSU represents a contingent right to receive one share of the Issuer's common stock.

2. These RSUs were issued pursuant to the reporting person's election to convert a portion of his 2014 performance bonus from cash to equity. The RSUs will vest in their entirety on April 1, 2016. All RSUs that have not vested will automatically terminate if the reporting person's employment is terminated by the Company for cause or the reporting person voluntarily terminates his employment with the Company, subject to certain acceleration provisions set forth in the reporting person's employment agreement.

3. These RSUs were granted as part of the Issuer's long term incentive program for executive officers. The RSUs will vest in four (4) equal annual installments beginning on April 1, 2016. All RSUs that have not vested will automatically terminate upon the reporting person's termination of employment with the Issuer and its subsidiaries, subject to certain acceleration provisions set forth in the reporting person's employment agreement.

4. Shares acquired as Company matching contributions under the Metabolix, Inc. 401(k) Plan.

	/s/ Sarah P. Cecil, attorney-in-fact	04/03/2015
	** 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 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).
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.

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Form 4 METABOLIX, INC. For: Apr 01 Filed by: HAASER CHARLES B

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