| SC 13G/A | 2012-02-13 | BlackRock Inc. | NISOURCE INC/DE | 17,257,687 | 6.1% | EDGAR |
| SC 13G | 2012-02-09 | STATE STREET CORP | NISOURCE INC/DE | - | 5.4% | EDGAR |
| SC 13G/A | 2012-02-08 | VANGUARD GROUP INC | NISOURCE INC/DE | 16,289,306 | 5.8% | EDGAR |
| SC 13G | 2011-02-11 | STATE STREET Corp | NISOURCE INC/DE | - | 5.1% | EDGAR |
| SC 13G | 2011-02-10 | VANGUARD GROUP INC | NISOURCE INC/DE | 15,209,271 | 5.5% | EDGAR |
| SC 13G/A | 2011-02-02 | BlackRock Inc. | NISOURCE INC/DE | 22,884,984 | 8.2% | EDGAR |
| SC 13G | 2010-02-12 | STATE STREET Corp | NISOURCE INC/DE | - | 5.2% | EDGAR |
| SC 13G | 2010-02-12 | AXA FINANCIAL INC | NISOURCE INC/DE | 19,729,034 | 7.2% | EDGAR |
| SC 13G | 2010-01-29 | BlackRock Inc. | NISOURCE INC/DE | 25,052,615 | 9.1% | EDGAR |
| SC 13G | 2009-02-05 | BARCLAYS GLOBAL INVESTORS NA /CA/ | NISOURCE INC/DE | 6,336,432 | 2.3% | EDGAR |
| SC 13G | 2008-02-06 | BARCLAYS GLOBAL INVESTORS NA /CA/ | NISOURCE INC/DE | 5,713,909 | 2.1% | EDGAR |
| SC 13G | 2007-01-23 | BARCLAYS GLOBAL INVESTORS NA /CA/ | NISOURCE INC/DE | 6,199,797 | 2.3% | EDGAR |
| SC 13G/A | 2006-02-10 | CAPITAL RESEARCH & MANAGEMENT CO | NISOURCE INC/DE | 4,685,090 | 3.6% | EDGAR |
| SC 13G/A | 2005-02-14 | CAPITAL RESEARCH & MANAGEMENT CO | NISOURCE INC/DE | 15,089,310 | 5.7% | EDGAR |
| SC 13G/A | 2004-02-13 | CAPITAL RESEARCH & MANAGEMENT CO | NISOURCE INC/DE | 19,031,870 | 7.3% | EDGAR |
| SC 13G | 2004-02-10 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | NISOURCE INC/DE | 5,214,515 | 2.0% | EDGAR |
| SC 13G | 2003-02-13 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | NISOURCE INC/DE | 13,827,032 | 5.6% | EDGAR |
| SC 13G/A | 2002-02-14 | FMR CORP | NISOURCE INC/DE | 4,212,960 | 2.0% | EDGAR |
| SC 13G/A | 2002-02-11 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | NISOURCE INC/DE | 9,158,153 | 4.4% | EDGAR |
| SC 13G | 2001-10-10 | NISOURCE INC/DE | AMERIGAS PARTNERS LP | - | - | EDGAR |