| Filed On | Filing |
|---|---|
| 24 Jun 2016 | FORM 11-K |
| 24 Jun 2016 | FORM 11-K |
| 25 Jun 2015 | FORM 11-K |
| 25 Jun 2015 | FORM 11-K |
| 27 Jun 2014 | FORM 11-K |
| 27 Jun 2014 | FORM 11-K |
| 27 Jun 2014 | FORM 11-K |
| 22 Nov 2013 | FORM 11-K |
| 28 Jun 2013 | FORM 11K |
| 27 Jun 2013 | FORM 11K |
| 27 Jun 2013 | FORM 11K |
| 27 Jun 2013 | FORM 11K |
| 27 Jun 2012 | FORM 11-K |
| 26 Jun 2012 | NICOR GAS THRIFT FORM 11-K FOR 12-31-11 |
| 26 Jun 2012 | NICOR COMPANIES SIP FORM 11-K FOR 12-31-11 |
| 26 Jun 2012 | BIRDSALL, INC RSP FORM 11-K FOR 12-31-11 |
| 29 Jun 2011 | FORM 11-K |
| 29 Jun 2010 | FORM 11-K |
| 29 Jun 2009 | FORM 11-K |
| 27 Jun 2008 | FORM 11K |
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