Metabolix to Conduct a Webcast of Its Second Quarter 2009 Earnings Call

Richard Eno, the Company’s President and CEO, and Joseph Hill, CFO, will host a conference call on the same day at 4:30 p.m. (Eastern) to discuss the results of the second fiscal quarter ended June 30, 2009, and answer questions from the investor audience. To participate, dial toll-free 1-800-260-6066 or 1-913-312-1278 (international). The passcode is 8148088. The conference call will be webcast and can be accessed from the Company’s website at www.metabolix.com in the investor relations section.

To listen to a telephonic replay of the conference call, dial toll-free 1-888-203-1112 or 1-719-457-0820 for international callers and enter passcode 8148088. The replay will be available beginning at 7:30 p.m. (Eastern) on Wednesday, July 29, 2009 and will last through 11:59 PM (Eastern) August 5, 2009. In addition, the webcast will be archived on the Company’s website in the investor relations section.

About Metabolix

Founded in 1992, Metabolix, Inc. is an innovation driven bioscience company focused on providing sustainable solutions for the world’s needs for plastics, chemicals and energy. The Company is taking a systems approach, from gene to end product, integrating sophisticated biotechnology with advanced industrial practice. Metabolix is now developing and commercializing Mirel™, a family of high performance bioplastics which are biobased and biodegradable alternatives to many petroleum based plastics. Metabolix is also developing a proprietary platform technology for co-producing plastics, chemicals and energy, from crops such as switchgrass, oilseeds and sugarcane.

For more information, please visit www.metabolix.com.

(MBLX-E)

ICR
Anthony Gallo, 203-682-8335 (Investor Relations)
ir@metabolix.com