X0303 4 2009-05-11 0 0001370946 Owens Corning OC 0001263972 D. E. SHAW LAMINAR PORTFOLIOS, L.L.C. 120 WEST FORTY-FIFTH STREET 39TH FLOOR NEW YORK NY 10036 1 0 0 1 See footnotes 2 and 3. 0001327537 D. E. Shaw Oculus Portfolios, L.L.C. 120 WEST FORTY-FIFTH STREET 39TH FLOOR NEW YORK NY 10036 1 0 0 1 See footnotes 2 and 3. 0001009268 D. E. SHAW & CO, L.P. 120 WEST FORTY-FIFTH STREET 39TH FLOOR NEW YORK NY 10036 1 0 0 1 See footnotes 2 and 3. 0001277502 D. E. SHAW & CO, L.L.C. 120 WEST FORTY-FIFTH STREET 39TH FLOOR NEW YORK NY 10036 1 0 0 1 See footnotes 2 and 3. 0001023870 SHAW DAVID E 120 WEST FORTY-FIFTH STREET 39TH FLOOR NEW YORK NY 10036 1 0 0 1 See footnotes 2 and 3. Common Stock 2009-05-11 4 S 0 150000 15.58 D 10737829 D Common Stock 2009-05-12 4 S 0 267449 15.0218 D 10470380 D Weighted average sale price for the transactions report on this line. Actual sales ranged in price from $15.00 to $15.27. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. D. E. Shaw & Co., L.P. ("DESCO LP"), as investment adviser to D. E. Shaw Laminar Portfolios, L.L.C. ("Laminar") and D. E. Shaw Oculus Portfolios, L.L.C. ("Oculus"); D. E. Shaw & Co., L.L.C. ("DESCO LLC"), as managing member of Laminar and Oculus; and David E. Shaw (as president and sole shareholder of D. E. Shaw & Co., Inc. ("DESCO, Inc."), which is the general partner of DESCO LP, and as president and sole shareholder of D. E. Shaw & Co. II, Inc. ("DESCO II, Inc."), which is the managing member of DESCO LLC) may be deemed, for purposes of Section 16 of the Securities Exchange Act of 1934, directors of the Issuer by virtue of DESCO LP employee David Lyon's service as member of the Issuer's board of directors. None of Laminar, Oculus, DESCO LP, DESCO LLC, or David E. Shaw serves as a director of the Issuer. (Continued from Footnote 2) In accordance with instruction 4(b)(iv), the entire number of shares of Common Stock of the Issuer that may be deemed to be beneficially owned by Laminar, Oculus, DESCO LP, or DESCO LLC was previously reported. None of DESCO LLC, DESCO, Inc., DESCO II, Inc., or David E. Shaw owns any shares of Common Stock directly, and each disclaims beneficial ownership of any of the securities reported, except to the extent of any pecuniary interest therein. DESCO LP disclaims beneficial ownership of the shares beneficially owned by Laminar and the shares beneficially owned by Oculus, except to the extent of any pecuniary interest therein. D. E. Shaw Laminar Portfolios, L.L.C. By: Rochelle Elias, Authorized Signatory 2009-05-13 D. E. Shaw Oculus Portfolios, L.L.C. By: Rochelle Elias, Authorized Signatory 2009-05-13 D. E. Shaw & Co., L.P. By: Rochelle Elias, Chief Compliance Officer 2009-05-13 D. E. Shaw & Co., L.L.C. By: Rochelle Elias, Chief Compliance Officer 2009-05-13 David E. Shaw By: Rochelle Elias, Attorney-in-fact for David E. Shaw 2009-05-13