Metabolix Inc.

Cambridge, Mass. • 617-492-0505 • www.metabolix.com

Exchange and Ticker: Nasdaq: MBLX

Filing Range: 5.8M shares at $12.00 to $14.00

Offering Price: $14.00

Close on First Day: $15.50

Close on 11/30/06: $16.80

Offering Size: $95.2M

Shares Outstanding: 19,394,430M

Underwriter: Piper Jaffray Cos.

Co-managers: Ardour Capital Investments LLC/Thomas Weisel Partners LLC/Jefferies & Co. Inc.

Company Counsel: Goodwin Procter LLP

Manager Counsel: Latham & Watkins

Auditor: Pricewaterhouse Coopers LLP

Market Capitalization on 11/30/06: $324.9M

DESCRIPTION

Develops and plans to commercialize environmentally sustainable, economically attractive alternatives to petrochemical-based plastics, fuels and chemicals. The company’s strategy is to develop technology platforms that integrate advanced biotechnology with current industrial practice and to commercialize these platforms with industry leading strategic partners. The company plans to use renewable agricultural feedstock as a manufacturing input. The biodegradability of PHA Natural Plastics can potentially address many of the issues associated with petrochemical-based products. The company’s PHA Natural Plastics degrade into water and carbon dioxide.

VENTURE BACKERS

Archer Daniels Midland, State Farm Insurance, The Vertical Group and Westfield Capital Management.

Source: Thomson Financial