| SC 13G | 2010-02-16 | THIRD AVENUE MANAGEMENT LLC | INVESTMENT TECHNOLOGY GROUP INC | 4,045,613 | 9.2% | EDGAR |
| SC 13G | 2010-01-29 | BlackRock Inc. | INVESTMENT TECHNOLOGY GROUP INC | 2,613,379 | 6.0% | EDGAR |
| SC 13G | 2009-02-13 | THIRD AVENUE MANAGEMENT LLC | INVESTMENT TECHNOLOGY GROUP INC | 2,637,172 | 6.1% | EDGAR |
| SC 13D/A | 2008-02-06 | D. E. SHAW LAMINAR PORTFOLIOS, L.L.C. | INVESTMENT TECHNOLOGY GROUP INC | 1,535,613 | 3.5% | EDGAR |
| SC 13D/A | 2007-09-27 | D. E. SHAW LAMINAR PORTFOLIOS, L.L.C. | INVESTMENT TECHNOLOGY GROUP INC | 4,396,235 | 9.9% | EDGAR |
| SC 13D/A | 2007-09-12 | D. E. SHAW LAMINAR PORTFOLIOS, L.L.C. | INVESTMENT TECHNOLOGY GROUP INC | 3,430,418 | 7.7% | EDGAR |
| SC 13D | 2007-06-12 | D. E. SHAW LAMINAR PORTFOLIOS, L.L.C. | INVESTMENT TECHNOLOGY GROUP INC | 12 | 6.2% | EDGAR |
| SC 13G/A | 2007-02-09 | GOLDMAN SACHS ASSET MANAGEMENT LP | INVESTMENT TECHNOLOGY GROUP INC | 135,343 | 0.3% | EDGAR |
| SC 13G/A | 2007-01-19 | BARCLAYS GLOBAL INVESTORS NA /CA/ | INVESTMENT TECHNOLOGY GROUP INC | 847,561 | 1.9% | EDGAR |
| SC 13G/A | 2006-07-10 | WELLINGTON MANAGEMENT CO LLP | INVESTMENT TECHNOLOGY GROUP INC | 939,750 | 2.2% | EDGAR |
| SC 13G/A | 2006-02-14 | WELLINGTON MANAGEMENT CO LLP | INVESTMENT TECHNOLOGY GROUP INC | 3,141,700 | 7.4% | EDGAR |
| SC 13G/A | 2006-02-14 | Sterling Capital Management LLC | INVESTMENT TECHNOLOGY GROUP INC | 13,700 | 0.0% | EDGAR |
| SC 13G | 2006-02-09 | BARCLAYS PLC | INVESTMENT TECHNOLOGY GROUP INC | 66,300 | 0.1% | EDGAR |
| SC 13G | 2006-02-06 | GOLDMAN SACHS ASSET MANAGEMENT LP | INVESTMENT TECHNOLOGY GROUP INC | 2,605,611 | 6.2% | EDGAR |
| SC 13G | 2006-01-26 | BARCLAYS GLOBAL INVESTORS NA /CA/ | INVESTMENT TECHNOLOGY GROUP INC | 1,214,010 | 2.9% | EDGAR |
| SC 13G | 2005-09-13 | WACHOVIA CORP NEW | INVESTMENT TECHNOLOGY GROUP INC | 1,722,547 | 4.1% | EDGAR |
| SC 13G/A | 2005-02-14 | WELLINGTON MANAGEMENT CO LLP | INVESTMENT TECHNOLOGY GROUP INC | 3,392,300 | 8.1% | EDGAR |
| SC 13G/A | 2005-02-14 | JUVONEN RONALD | INVESTMENT TECHNOLOGY GROUP INC | 309,470 | 0.7% | EDGAR |
| SC 13G | 2005-02-14 | BARCLAYS GLOBAL INVESTORS NA /CA/ | INVESTMENT TECHNOLOGY GROUP INC | 1,087,584 | 2.6% | EDGAR |
| SC 13G | 2005-02-14 | WACHOVIA CORP NEW | INVESTMENT TECHNOLOGY GROUP INC | 2,382,623 | 5.7% | EDGAR |