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Mathematica Capital Management, LLC
> VLO
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 09/30/2008 | VALERO ENERGY CORP/TX | VLO | 138 | 54 | 4,000 | 1,000 | $28.99 |
| 06/30/2008 | VALERO ENERGY CORP/TX | VLO | 84 | -3,862 | 3,000 | -191,000 | $35.71 |
| 03/31/2008 | VALERO ENERGY CORP/TX | VLO | 3,946 | 3,946 | 194,000 | 194,000 | $49.16 |
| 12/31/2007 | VALERO ENERGY CORP/TX | VLO | 1,649 | 49 | 115,000 | 8,000 | $69.74 |
| 09/30/2007 | VALERO ENERGY CORP/TX | VLO | 1,600 | -600 | 107,000 | -6,000 | $66.88 |
| 09/30/2006 | VALERO ENERGY CORP/TX | VLO | 2,200 | 2,200 | 113,000 | 113,000 | $51.36 |
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