| Event | Date | Length | Format |
| Third Quarter and Nine Months 2011 Earnings Call | November 21, 2011 | (17 min.) |
WMA |
| Second Quarter and First Six Months 2011 Earnings Call | August 15, 2011 | (18 min.) |
WMA |
| First Quarter 2011 Earnings Call | May 23, 2011 | (14 min.) |
WMA |
| 2010 Results Conference Call | March 21, 2011 | (31 min.) |
WMA |
| Third Quarter and Nine Months 2010 Earnings Call | November 21, 2010 | (17 min.) |
WMA |
| Second Quarter and First Six Months 2010 Earnings Call | August 23, 2010 | (31 min.) |
WMA |
| First Quarter 2010 Earnings Call | May 25, 2010 | (14 min.) |
WMA |
| 2009 Results Conference Call | March 23, 2010 | (30 min.) |
WMA |
| Third Quarter and Nine Months 2009 Earnings Call | November 11, 2009 | (36 min.) |
WMA |
| Second Quarter and First Six Months 2009 Earnings Call | August 17, 2009 | (23 min.) |
WMA |
| First Quarter 2009 Earnings Call | May 18, 2009 | (23 min.) |
WMA |
| 2008 Results Conference Call | March 30, 2009 | (19 min.) |
WMA |
| Third Quarter and Nine Months 2008 Earnings Call | November 24, 2008 | (29 min.) |
WMA |
| Second Quarter and First Six Months 2008 Earnings Call | August 18, 2008 | (16 min.) |
WMA |
| Agreement to Acquire the Balance Shares in Carmel Olefins | June 26, 2008 | (13 min.) |
WMA |
| First Quarter 2008 Earnings Call | May 21, 2008 | (40 min.) |
WMA |
| 2007 Results Conference Call | March 20, 2008 | (39 min.) |
WMA |
| Third Quarter and Nine Months 2007 Earnings Call | November 20, 2007 | (28 min.) |
WMA |
| Strategic Plan, November 2007 | November 07, 2007 | (28 min.) |
WMA |
| Second Quarter and First Six Months 2007 Earnings Call | August 20, 2007 | (21 min.) |
WMA |
| First Quarter 2007 Earnings Call | May 29, 2007 | (23 min.) |
WMA |
| Fiscal Year 2006 Earnings Call | March 22, 2007 | (25min.) |
WMA |