X0205 3 2012-05-01 0 0001121702 METABOLIX, INC. MBLX 0001548650 Senechal Max C/O METABOLIX, INC. 21 ERIE STREET CAMBRIDGE MA 02139 0 1 0 0 VP, Bio-Based Chemicals Stock Option (right to buy) 11.76 2020-09-01 Common Stock 20000 D Stock Option (right to buy) 9.12 2021-02-11 Common Stock 10000 D Stock Option (right to buy) 2.66 2022-02-01 Common Stock 20000 D This stock option will vest and become exercisable in 16 quarterly installments over a period of four years from 09/01/2010. This stock option will vest and become exercisable in 16 quarterly installments over a period of four years from 02/11/2011. This stock option will vest and become exercisable in 16 quarterly installments over a period of four years from 02/01/2012. /s/ Sarah P. Cecil, attorney-in-fact 2012-05-03