X0202 4 2007-06-12 0 0001121702 METABOLIX, INC. MBLX 0001377832 Strobeck Matthew C/O METABOLIX, INC. 21 ERIE STREET CAMBRIDGE MA 02139 1 0 0 0 Common Stock 2007-06-12 4 S 0 200 20.33 D 40665 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-06-12 4 S 0 11969 20.71 D 28696 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-06-12 4 S 0 600 20.75 D 28096 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-06-12 4 S 0 400 20.8 D 27696 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-06-12 4 S 0 586 20.81 D 27110 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-06-12 4 S 0 100 20.82 D 27010 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-06-12 4 S 0 6682 20.85 D 20328 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-06-12 4 S 0 1100 20.86 D 19228 I By Guggenheim Portfolio Company, LLC Common Stock 2007-06-12 4 S 0 10428 20.87 D 8800 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-06-12 4 S 0 1600 20.88 D 7200 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-06-12 4 S 0 200 20.89 D 7000 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-06-12 4 S 0 3000 20.9 D 4000 I By Guggenheim Portfolio Company XIX, LLC Common Stock 2007-05-12 4 S 0 4000 21.13 D 0 I By Guggenheim Portfolio Company XIX, LLC Common Stock 382087 I By Westfield Life Sciences Fund II L.P. Common Stock 67427 I By Westfield Life Sciences Fund L.P. Common Stock 54486 I By Westfield Microcap Fund L.P. The reporting person is a senior investment analyst at Westfield Capital Management Company, LLC, and shares voting and investment power over shares held by Guggenheim Portfolio Company XIX, LLC, Westfield Life Science Fund II L.P., Westfield Life Science Fund L.P. and Westfield Microcap Fund L.P. /s/ Sarah P. Cecil, attorney-in-fact 2007-06-14