SEC Form 4

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	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	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* Peoples Oliver P (Last) (First) (Middle) C/O METABOLIX, INC. 21 ERIE STREET (Street) CAMBRIDGE MA 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) X Director 10% Owner X Officer (give title below) Other (specify below) VP Research, CSO
	3. Date of Earliest Transaction (Month/Day/Year) 10/01/2007
	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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/01/2007		S(1)		12,000	D	$24.068(3)	320,762	D
Common Stock								16,346	I	By George Stormont Trust(2)

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Transaction effected pursuant to a rule 10b5-1 trading plan established by the reporting person on 3/15/07.

2. Held by a trust for the benefit of certain family members. The reporting person disclaims beneficial ownership except to the extent of his pecuniary interest, if any.

3. Price reflected is the average sale price for the shares sold. Please see attached Exhibit 99 for a complete list of all sales by sale price.

	/s/ Sarah P. Cecil, attorney-in-fact	10/02/2007
	** 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.

Exhibit 99 to Form 4 filed on behalf of Oliver P.
Peoples for Transaction Date 10/1/07

PRICE	QUANTITY

$24.0600  200
$24.0800  300
$24.1200  100
$24.1300  100
$24.1500  300
$24.1700  200
$24.2000  100
$24.2200  500
$24.2300  200
$24.2400  200
$24.2700  400
$24.2800  100
$24.3300  100
$24.3400  200
$23.9400    2
$23.9800  100
$24.0200  200
$24.0300  100
$24.0500  299
$24.0700  200
$24.0800  200
$24.1200  200
$24.1300  200
$24.1500  100
$24.1600  100
$24.1700  100
$24.1800  100
$24.2000  199
$24.2300  200
$24.2600  400
$24.2700  100
$24.2800  100
$24.3000  100
$23.4400  100
$23.4500  321
$23.4600  200
$23.6700  200
$23.6900  200
$23.7400  300
$23.8500  100
$23.8600  100
$23.8800  200
$23.9300  100
$23.9400  279
$23.9500  100
$23.9700  300
$23.9900  300
$24.0000  100
$24.0300  100
$24.2400  200
$24.2500  100
$24.2700  193
$24.2800 1,200
$24.3300  300
$24.3400  200
$24.3600  100
$24.3900  100
$24.4100  207
$24.4200  400