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| 5/19/2008 | BKCVHY | S&P gives Transcontinental notes BBB- |
| 5/19/2008 | BKCVHY | Fitch gives Transcontinental notes BBB |
| 5/19/2008 | BK | Transcontinental Gas to repay revolver debt with notes proceeds |
| 11/15/2007 | BKCVHY | Moody's lifts Williams from junk |
| 7/20/2007 | BKCVHY | Fitch affirms Williams Cos. |
| 9/27/2006 | BK | Moody's introduces new ratings |
| 5/4/2006 | BKCVHY | S&P raises Williams |
| 4/6/2006 | BKCVHY | Fitch gives Transcontinental Gas Pipe Line notes BB+ |
| 12/14/2004 | BKCVHY | S&P rates Transcontinental Gas Pipeline notes B+ |