X0202 4 2007-11-09 1 0000920424 INVESTMENT TECHNOLOGY GROUP INC ITG 0001263972 D. E. SHAW LAMINAR PORTFOLIOS, L.L.C. 39TH FLOOR, TOWER 45 120 WEST FORTY-FIFTH STREET NEW YORK NY 10036 0 0 1 1 See footnotes 1 and 2 0001009268 D. E. SHAW & CO, L.P. 39TH FLOOR, TOWER 45 120 WEST FORTY-FIFTH STREET NEW YORK NY 10036 0 0 1 1 See footnotes 1 and 2 0001277502 D. E. SHAW & CO, L.L.C. 39TH FLOOR, TOWER 45 120 WEST FORTY-FIFTH STREET NEW YORK NY 10036 0 0 1 1 See footnotes 1 and 2 0001023870 SHAW DAVID E 39TH FLOOR, TOWER 45 120 WEST FORTY-FIFTH STREET NEW YORK NY 10036 0 0 1 1 See footnotes 1 and 2 0001419081 D. E. Shaw Synoptic Portfolios 2, L.L.C. 39TH FLOOR, TOWER 45 120 WEST FORTY-FIFTH STREET NEW YORK NY 10036 0 0 1 1 See footnotes 1 and 2 Common Stock 2007-11-14 4 P 0 700 43.24 A 4396392 D Common Stock 2007-11-14 4 P 0 200 43.25 A 4396392 D Common Stock 2007-11-14 4 P 0 100 43.27 A 4396392 D Common Stock 2007-11-14 4 P 0 300 43.30 A 4396392 D Common Stock 2007-11-14 4 P 0 800 43.32 A 4396392 D Common Stock 2007-11-14 4 P 0 300 43.35 A 4396392 D Common Stock 2007-11-14 4 P 0 200 43.38 A 4396392 D Common Stock 2007-11-14 4 P 0 100 43.39 A 4396392 D Common Stock 2007-11-14 4 P 0 300 43.42 A 4396392 D Common Stock 2007-11-14 4 P 0 400 43.45 A 4396392 D Common Stock 2007-11-15 4 P 0 200 41.74 A 4396392 D Common Stock 2007-11-15 4 P 0 300 41.82 A 4396392 D Common Stock 2007-11-15 4 P 0 100 41.86 A 4396392 D Common Stock 2007-11-15 4 P 0 500 41.88 A 4396392 D Common Stock 2007-11-15 4 P 0 100 41.92 A 4396392 D Common Stock 2007-11-15 4 P 0 100 41.93 A 4396392 D Common Stock 2007-11-15 4 P 0 100 42.28 A 4396392 D Common Stock 2007-11-15 4 P 0 200 42.31 A 4396392 D Common Stock 2007-11-15 4 P 0 300 42.32 A 4396392 D Common Stock 2007-11-15 4 P 0 300 42.33 A 4396392 D Common Stock 2007-11-15 4 S 0 720 42.25 D 4395672 D Common Stock 2007-11-15 4 S 0 1400 42.26 D 4394272 D Common Stock 2007-11-15 4 S 0 400 42.27 D 4393872 D Common Stock 2007-11-15 4 S 0 1200 42.28 D 4392672 D Common Stock 2007-11-15 4 S 0 601 42.29 D 4392071 D Common Stock 2007-11-15 4 S 0 300 42.30 D 4391771 D Common Stock 2007-11-15 4 S 0 3700 42.31 D 4388071 D Common Stock 2007-11-15 4 S 0 700 42.32 D 4387371 D Common Stock 2007-11-15 4 S 0 900 42.35 D 4386471 D Common Stock 2007-11-15 4 S 0 900 42.36 D 4385571 D The securities of the Issuer to which this form relates are held directly by D. E. Shaw Laminar Portfolios, L.L.C. ("Laminar") and D. E. Shaw Synoptic Portfolios 2, L.L.C. ("Synoptic"). D. E. Shaw & Co., L.P. ("DESCO LP"), as investment adviser to Laminar and Synoptic; D. E. Shaw & Co., L.L.C. ("DESCO LLC"), as managing member of Laminar and Synoptic; and David E. Shaw (as president and sole shareholder of D. E. Shaw & Co., Inc., which is the general partner of DESCO LP, and as president and sole shareholder of D. E. Shaw & Co. II, Inc., which is the managing member of DESCO LLC), may be deemed to be the beneficial owners of more than 10% of the Common Stock of the Issuer for purposes of Rule 16a-1(a) of the Securities Exchange Act of 1934. (Continued from Footnote 1) In accordance with General Instruction 4(b)(iv), the entire number of shares of Common Stock that may be deemed to be beneficially owned by Laminar, Synoptic, DESCO LP, DESCO LLC, or David E. Shaw are reported herein. Each of Laminar, Synoptic, DESCO LP, DESCO LLC, and David E. Shaw disclaims beneficial ownership of the securities listed in this Form 4, except to extent of any pecuniary interest therein. Due to system limitations for reporting transactions via EDGAR on Form 4, this Form 4 is the sixth of six Form 4s filed for the reporting persons covering transactions reported for the period of November 9, 2007 through November 15, 2007. D. E. Shaw Laminar Portfolios, L.L.C. By: D. E. Shaw & Co., L.L.C., as managing member By: /s/ Rochelle Elias, Chief Compliance Officer 2007-11-20 D. E. Shaw Synoptic Portfolios 2, L.L.C. By: D. E. Shaw & Co., L.L.C., as managing member By: /s/ Rochelle Elias, Chief Compliance Officer 2007-11-20 D. E. Shaw & Co., L.P. By: /s/ Rochelle Elias, Chief Compliance Officer 2007-11-20 D. E. Shaw & Co., L.L.C. By: /s/ Rochelle Elias, Chief Compliance Officer 2007-11-20 David E. Shaw By: /s/ Rochelle Elias, Attorney-in-Fact 2007-11-20